JPS6185946A - Treatment table - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an improvement of a medical treatment table, particularly a dental treatment table, in which a back seat can be raised and lowered with respect to a seat seat. Utility Model Publication No. 40-623 concerning the application.
Utility patent application No. 56-87022 and Utility application No. 58-174421
and Japanese Unexamined Patent Publication No. 1983-1989 filed by a person other than the applicant. -695
Regarding the improvement of the treatment table provided in No. 58.

<Prior Art> Among the above-mentioned known treatment tables, as shown in FIG. 12(a), before and after the tilting movement of the treatment table Sa by the action of the driving source 3a, the head and back of the patient are moved toward the back seat base. The treatment table disclosed in Japanese Utility Model Publication No. 40-623, which prevents sliding along the line 2a, and the treatment table shown in FIG. 12(b) which is a further improvement of this table.
As shown in 1987, the circumferential velocity of the backseat base 2b relative to the seat base 1b when standing up and tilting is uniform during the up-and-down movement process due to the action of the constant-velocity drive source 3b.
- The treatment table 8b disclosed in Japanese Patent No. 87022, and the Utility Model Application No. 1983-
17442111 JP-A-58-6955 shown in Figure (d)
Japanese Patent No. 8 discloses an actuating device 8d' for a dental chair Sd that is improved so that the patient will not be placed in an unreasonable posture even when the backrest 2d is tilted significantly with respect to the seat 1d.

<Problems to be Solved by the Invention> Among these prior art techniques, those shown in FIGS. 12(a) and 12(b) are
It has a structure in which the back seat bases 2m+2b are rolled into the lower part of the seat bases 1a+1b when the seat bases 1a*1b are laid down, and furthermore, as shown in FIG.
In b), the circumferential speed of the backsheet base is made substantially uniform during the up-and-down movement. However, in both cases, the backseat bases 2a+2b are rotated around 01101 and %01loz is below the upper surface of the seat bases 1a+1b, so the virtual center of rotation of the patient's lumbar vertebrae on the seat bases 1a+1b is However, it could not be said that the patient's discomfort had been completely eradicated. On the other hand, in both FIGS. 12(C) and 12(d), the virtual center of rotation of the lumbar vertebrae is set at 0104 on the seat bases 3c and 3d, so the patient's discomfort is generally reduced to 0104. It was done. However, Fig. 12(c), @
In FIG. 12(a), there remained a problem in manufacturing and mechanically making it difficult to completely eliminate patient discomfort. The problem is that in Fig. 12(c), an arc-shaped slide rod 6c was adopted to prevent rattling in the width direction of the seat, but it is difficult to manufacture an arc-shaped slide rod, and the accuracy is low. In addition, in the mechanism shown in FIG. 12(d), the roller 4d75E is provided on the seat base 1d, and one arcuate plate 5d is Since it is only provided on the backsheet base 2d, when the arcuate plate 5d slides due to the ups and downs of the backsheet base 2d, it must be in contact with the rollers at least a distance equal to the width of the left and right rollers 4d. There is. However, the length of the arc-shaped plate 5d must be at least equal to this length. When the back seat base 2d falls down, the arc-shaped plate 5d and the seat base 1d may collide, and when the back seat base 2d is raised, a cushion member (not shown) attached to the back seat base 1d and a cushion attached to the seat base 1d. It is necessary to devise ways to eliminate gaps with other members (not shown). In addition, in the mechanism shown in FIG. 12(d), since the position of the roller 4d with respect to the seat base 1d is fixed, increasing the distance between the rollers increases the mechanical safety of supporting the back seat base 2d. However, as mentioned above, there are drawbacks. For this reason, it has become necessary to keep the undulation angle of the backsheet base small.

Means for Solving the Problems> The treatment table of the present invention includes a seat base, a back seat base, and a drive source articulated and held by the seat base and the back seat base. A treatment table in which a back seat base can be moved up and down relative to a seat base by actuation of a driving source, the seat base having rollers and arcuate grooves or arcuate plates spaced apart at an end of the back seat base. or by disposing an arcuate groove or an arcuate plate that extends to the position iK of the circular groove or plate and the roller, and engages with the roller at the end of the bank sheet base on the seat sheet base side. A mating arc-shaped groove or arc-shaped plate and the arc-shaped plate [one or the rollers that engage with the arc-shaped plate are spaced apart, or the rollers that engage with the arc-shaped groove or the arc-shaped plate are spaced apart] It is characterized by its location.

Effect> The present invention has a structure in which two arcuate grooves or arcuate plates are engaged with one roller each or a combination of a pair of upper and lower rollers. Alternatively, the arcuate groove or arcuate plate is only required for a distance corresponding to the rolling distance of the pair of upper and lower rollers, and if the rollers are positioned further away from the upper surface of the seat base, the arrangement can be made without any problem. For this reason.

It is possible to have a structure in which the undulation angle of the backsheet base body can be increased. In addition, the circumferential speed of the back seat base during the up-and-down movement process is almost completely uniform, eliminating the patient's fear caused by unbalanced circumferential speed. Since the base rotates around an appropriate position on the upper surface of the base, the position of the patient's head and the headrest match regardless of the undulations of the backrest base, thereby reducing the risk of slippage and other problems caused by discrepancies. To provide an excellent treatment table that eliminates the feeling of pleasure and eliminates the need for the operator to readjust the headrest position.

<Example> Embodiments of the treatment table of the present invention will be explained based on the accompanying drawings.

Fig. 1 is a partially cutaway perspective view of the first embodiment of the treatment table of the present invention, Fig. 2 is a partially cutaway plan view, Figure @3 is a side view of the same portion, and Fig. 4 is a partially cutaway side view of the treatment table of the present invention. A partially cutaway side view of the second embodiment, Fig. 5 is a partially cutaway side view of the same @3 embodiment, @6
The figure is a partially cutaway plan view of the fourth embodiment, FIG. 7 is a sectional view taken along the line ■-■ in FIG. 3, and FIG. 8 is a cross-sectional view taken along the line ■-■ in FIG.
The line cross-sectional view @9 is the IX-IX line cross-sectional view in Figure @5.
FIG. 10 is a sectional view taken along the line X--X in FIG. 6. FIG. 11 is a principle diagram showing the up-and-down movement of the back sheet base in each embodiment of the present invention.

In the figure, a treatment table S is constructed by surrounding a base portion, that is, a skeleton portion, with an appropriate cushioning material, cover material, etc. On the treatment table S, the patient P moves up and down around the virtual rotation center O of the lumbar vertebrae as the back seat rises and falls, but the back seat is connected to the seat at its lower end, and the patient P moves up and down around this connection point. In this case, since the rotation center point O of the lumbar vertebrae is different from the rotation center point O of the lumbar vertebrae, the patient's head and back will shift due to the ups and downs of the back seat. Therefore, in this type of treatment table, as in the prior art, when the bank seat is tilted, the lower end of the back seat generally makes an arcuate movement and slides under the seat.

1 to 3 and 7, the first embodiment of the treatment table according to the present invention has a vertical adjustment device (
(not shown) upper seat base 1, rollers 40, 40 and arc-shaped yso, so arranged on both row side surfaces 11111 of the back seat side in order from the edge side to the inside, and a bank seat base 20 seats. Side end both sides 12.1
2, the arcuate groove 50+ is sequentially arranged inward from the edge side.
rollers 45 and 45 which are loosely fitted in a rollable manner to the roller 50; and an arcuate groove 5595 in which the rollers 40 and 40 are loosely fitted in a rollable manner.
5 and this guide holding means 10.
The back seat base 2 is held movably up and down with respect to the seat base 1 via
and a drive source 3 which is articulated and held by the back seat base 2 and performs an expansion and contraction driving action. In the construction example, an arcuate groove 501.5 provided in the seat base l
The radius of curvature of 0 is selected to be larger than the radius of curvature of the arcuate groove 55.55 provided in the backsheet base 2. And the roller 40.4G (i: The lower end of the back seat base 2 rotatably supported is an arcuate groove 50150 of the seat base 2 whose center of curvature 1 approximately coincides with the virtual rotation center O of the lumbar vertebrae of the patient P. roller 40 +
Its motion trajectory is regulated by the tangent of 40.

4 and 8 show a treatment table S according to a second embodiment of the present invention, which is different from that of the first embodiment. Arc groove 50.
55 have the same radius of curvature. Other structures and movements are the same as in the first embodiment, but manufacturing costs are reduced because the same arcuate grooves are used.

5 and 9 show a treatment table S according to a third embodiment of the present invention, in which an arcuate plate 60 having the same radius of curvature as the arcuate groove 50*55 in the first embodiment is placed at the position Δ. , 65 are attached, and rollers 40, 45 are arranged vertically and oppositely to each hold the arc-shaped plates 60t65. This also exhibits an excellent effect in preventing rattling in the first and second embodiments, in which the rollers 40 and 45 are loosely fitted in the arcuate groove 50° 55 for rolling. Also second
It goes without saying that an arcuate plate having the same radius of curvature as in the embodiment can be used.

CjI, Figures 6 and 10 show a treatment table S according to a fourth embodiment of the present invention, in which virtual centers of rotation of the lumbar vertebrae of the patient P are located on the sides of both rows of the back seat side end of the seat base 1. An arcuate groove 70.70 having a center of curvature a that substantially coincides with O is provided, and the groove 70.70 is loosely fitted into this arcuate groove 70.70 on both sides of the seat side end of the backseat base 2. The two rollers 90 and 95 that are in contact with each other are arranged at intervals that allow stable support even if the backsheet base body 2 is largely tilted.

It can be easily inferred that instead of the arcuate grooves 70, an arcuate plate can be used as in the third embodiment. Further, if space is available, the groove can be divided into two arcuate grooves with different radii of curvature. Considering the above four embodiments with reference to FIG. 11, line segment AB (A'B'
) shows the locus of the up-and-down movement of the back seat base 2, and O(a) shows the virtual center of rotation of the patient's lumbar vertebrae on the seat base 1 at the seat J,. In the case of the first embodiment and the third actual example, one person is at the upper end position of the backsheet, B is at the lower end position of the backsheet, C is the roller 45 disposed on the backsheet base 2, and A, B, C and A' + B'
+ Roller 40 disposed on the sheet base 1? i-, which remains in place regardless of the ups and downs of the backsheet base 2;
When the drive source 3 (shown as a hydraulic cylinder in the figure) draws the lower part of the backseat base 2 toward the seat base 1, the upper and lower ends of the backseat base move from positions A and H to positions A', Change to position 13'.

Show the trajectory. In the case of the second embodiment, the seat base 1
The roller 40 is arranged so that the position D of the roller 40 coincides with the position C, and the position remains the same as the position C regardless of the ups and downs of the back sheet base 2. ,Man,
gl for B, A', B'.

This is the same as the third embodiment. Next, in the case of the fourth implementation column,
Rollers 90 and 95 arranged on the backsheet base 2
The upright state of the backsheet base 2 is shown as C and D, respectively, and the fallen state is shown as C' and D', respectively, and the other A and B
, A', and B' are the same as in the @11 third embodiment.

As can be seen from the schematic diagrams of the four embodiments described above, the back seat base 2 changes from the standing position of the person B to the lying position A'B'
And, except for moving in the opposite direction, the distance between the rollers 40° 45 and the rollers 9G, 95 is the shortest when the backsheet base 2 is erected in the first to third embodiments. The length is configured to be the longest when the backsheet is folded down, and in the fourth embodiment, it is configured to be constant regardless of the ups and downs of the backsheet. And @1
- In the third embodiment, even if the distance between the rollers changes due to the ups and downs of the backsheet base 2, the results are as shown in FIG. 12(d).

There is no need for an extra length of the arcuate plate, and only the length of the arcuate j4 or the arcuate plate is required for the rolling of the roller. Furthermore, when the bank seat base 2 is laid down and the most mechanical stability is required for the seat base 1, the distance between the rollers is
Since 4 is an open T-configuration, the effect of creating a sturdy structure can also be obtained. In the fourth embodiment, although there is no relative change in the distance between the rollers due to the ups and downs of the backsheet base 2, the distance between the rollers is arranged vertically as shown in B and D in FIG. It is possible to create a configuration that does not require a long arc-shaped plate.

In addition, all of these four embodiments have a backsheet base 2
When the top of the P moves from the person to the A/ due to the ups and downs, it draws an arcuate trajectory centered on the patient's 1 m 4 iu virtual rotation center 0, which almost perfectly corresponds to the movement of the patient P's head. Furthermore, since the telescoping movement of the first driving source 3 is converted into a complete circular arc movement, if the speed of the telescoping movement is constant, the angular velocity of the arc movement is also constant. It can eliminate the fear caused by fluctuations in acceleration.

It should be noted that the above embodiments are just a few examples, and for example, the width of the seat base may be configured to be wider than the width of the back seat base by υ, as long as the width does not deviate from the present invention. It goes without saying that other embodiments can also be adopted.

<Effects of the Invention> As described above, according to the configuration of the treatment table S of the present invention, the length of the extra arc-shaped plate or arc-shaped groove is not required, and the undulation angle of the back sheet base can be set sufficiently. Along with
It is possible to provide a treatment table that does not create a gap between the cushions between the back seat base and the seat base when the back seat base is raised and lowered. In particular, by allowing the backsheet base to have a sufficient undulating angle, it is possible to provide a dental treatment table that can be used in a wide range of dental treatments, from a vertically standing position for prosthetics to a horizontally lying position for general preservation.

Furthermore, since the backseat base is rotated around the virtual rotational position of the patient's lumbar vertebrae on the upper surface of the seat base, discomfort resulting from a misalignment between the patient's head and the headrest due to the ups and downs of the backseat base. The patient's fear can be eliminated by sweeping the backsheet substrate completely and making the circumferential speed of the backsheet substrate almost completely uniform during the up-and-down movement process. Taken together, the usefulness of the present invention is extremely large.

[Brief explanation of the drawing]

@ Figure 1 is a partially cutaway perspective view of the first embodiment of the treatment table of the present invention, Figure 2 is a partially cutaway plan view, Figure 3 is a side view of the same portion, and Figure 4 is the treatment table of the present invention. FIG. 5 is a partially cutaway side view of the second embodiment, and FIG. 5 is a partially cutaway side view of the third embodiment.
The figure is a partially cutaway plan view of the fourth cusp example (Fig. 7 is a cross-sectional view of ■-■ green in Fig. 3, and Fig. 8 is a -■-
■Heddle cross-sectional view Figure 9 is a cross-sectional view taken along the line IX-IX in Figure 5, Figure 10 is a cross-sectional view taken along the line X-X in Figure 6, and Figure 11 is the up-and-down movement of the backsheet base in each embodiment of the present invention. Principle diagram showing Fig. 12 fa), (b), (cl
, (d) are explanatory diagrams showing a treatment table and its assisting device according to the prior art. (Explanation of symbols) 1--Seat base, 2--Back seat base. 3... Drive source, 11--Back seat side end of seat base, 12- Seat side end of back seat base, 40.45.90.95-Roller, 50#55170
... Arc groove, 60.65 - arc plate, 1... center of curvature of arc groove and arc plate, 0 - virtual center of rotation of patient's lumbar vertebrae, P - patient, S - Treatment table. -And more-

Claims (1)

[Claims] 1. Seat base (1) and back seat base (2)
And these seat base (1) and back seat base (
The treatment table (S) has a drive source (3) articulated with and held by the treatment table (S), and the back seat base (2) can be moved up and down with respect to the seat base (1) by the operation of the drive source. )
, a roller (40) and an arcuate groove (
50) or arc-shaped plates (60) are arranged at intervals, or arc-shaped grooves (70) or arc-shaped plates extending between the arc-shaped grooves or at the positions of the arc-shaped plate (60) and the roller (40) are arranged. At the same time, the back sheet base (2)
The roller (40) is attached to the seat side end (12) of the seat.
) or arcuate plate (65) that engages with the arcuate groove (55) or arcuate plate (65
) and the arcuate groove (50) or the arcuate plate (
60), or rollers (90) and (95) that engage with the arcuate groove (70) or the arcuate plate, are arranged at intervals. A distinctive treatment table. 2. The arcuate grooves (50), (55) or the arcuate plate (
60) and (65), the center of curvature (a) is aligned with the virtual center of rotation (O) of the lumbar vertebrae of the patient (P) who lies on the upper surface of the seat base (1) of the treatment table. A treatment table according to claim 1. 3. The arcuate grooves (50), (55) or the arcuate plate (
60) and (65) form perfect circular arcs, the treatment table according to claim 1. 4. The rollers (40) and (45) form an upper and lower pair and freely roll to sandwich the arcuate plates (60) and (65) from above and below. treatment table. 5. The treatment table according to claim 1, wherein the rollers (40) and (45) rotatably roll in the arcuate grooves (50) and (55), respectively. 6. Claims 2, 3, and 4, wherein the arcuate plates (60) and (65) have the same curvature.
A treatment table described in any of the sections. 7. Claims 2, 3, and 4, wherein the arcuate plates (60) and (65) have different curvatures.
A treatment table described in any of the sections. 8. Claims 2, 3, and 5, wherein the arcuate grooves (50) and (55) have the same curvature.
A treatment table described in any of the sections. 9. The treatment table according to claim 5, wherein the arcuate grooves (50) and (55) have different curvatures. 10. The arcuate groove (70) or the arcuate plate has its center of curvature (a) set at the virtual center of rotation (O) of the lumbar vertebrae of the patient (P) lying on the upper surface of the seat base (1) of the treatment table. A treatment table according to claim 1, which is made to conform to the following. 11. The treatment table according to claim 1, wherein the arcuate groove (70) or the arcuate plate forms a perfect circular arc. 12. The treatment table according to claim 1, wherein the rollers (90) and (95) form a pair of upper and lower rollers to freely roll and sandwich the arcuate plate from above and below. 13. The treatment table according to claim 1, wherein the rollers (90) and (95) are rotatably in contact with each other in the arcuate groove (70). 14. The arcuate grooves (50), (55), (70) or the arcuate plates (60) (65) are connected to the seat base (1)
and the treatment table according to any one of claims 1 to 9, which is provided on both left and right sides of the back seat base (2).