JPH038266Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a movement mechanism for a work table used in dental treatment and the like.

Prior Art FIG. 6 is a diagram for explaining an example of a conventional dental table moving mechanism, in which 1 is a dental treatment chair, 2 is a work table, and 3 is an arm for moving the work table. One end of the arm 3 is rotatably attached to a fixed portion on the chair side about a point _P1 , and the other end is rotatably attached to the work table 2 at a point _P2 . Therefore, the work table 2 is capable of circular motion of Q ₁ centered on point P ₁ and rotational motion of Q ₂ centered on point P ₂ , but the work table 2 can be moved at the solid line position of A _1. When moving from A ₂ to the dashed-dotted line position, or from A ₂ position to A ₁ position,
If you simply push the work table 2 in the direction of arrow B ₁ or arrow B ₂ , the work table will mainly
P It rotates around _one point, and the relative position of work table 2 with respect to chair 1 changes. In other words, the work table 2 does not move parallel to the chair 1. In actual use, various dental treatment instruments, medicines, etc. are placed on the work table 2.
Auxiliary items such as gauze and absorbent cotton are mounted, and therefore it is preferable that the work table 2 is moved in parallel to the chair 1. However, in the conventional work table movement mechanism described above, in order to move the work table 2 in parallel, , a force is applied to work table 2 that causes arm 3 to rotate around point _P1 , and work table 2 is applied to work table 2 regardless of the movement of arm 3.
It is necessary to simultaneously apply a force to maintain the chair 1 in its initial state, that is, parallel to the chair 1, and the method of applying the force is complicated, making it difficult to operate. Further, the work table described above is manually moved, and the user must go near the work table when operating it, which is very troublesome to operate. In particular, when patients get on and off the treatment chair, it is necessary to move the work table to a position where it does not get in the way of getting on and off the treatment chair.Moreover, recent treatment chairs can be raised and lowered, so it is necessary to move the work table to a position that does not interfere with the patient getting on and off the treatment chair. However, in such cases, the work table must be moved to a position that is easier to treat as the chair is raised or lowered. However, the work table had to be manually adjusted each time, which was extremely inconvenient.

Purpose The present invention was made to solve the above-mentioned drawbacks of the prior art, and in particular, to provide a work table moving mechanism that can move the work table parallel to the chair by remote control. It was made for the purpose of

Structure Fig. 1 is an overall plan view for explaining one embodiment of the present invention, Fig. 2 is a perspective view of the main parts, and Fig. 3 is an exploded part. A work table, 13 is a first horizontal arm that connects the chair side fixed part and the work table side, and 14 is a work table 12 at the tip of the first horizontal arm.
15 is a gear motor, 16 is a gear motor mounting plate, 17 is a gear rotated by the gear motor 15, and the gear motor 15 is connected to the motor mounting plate 16 by a bolt 18. attached to the motor mounting plate 16
is attached to the chair-side fixing part 11 with bolts 19, and the gear 17 is attached to the rotating shaft of the gear motor 15. The motor mounting plate 16 is the first
The first horizontal arm 13 has a flat part 16a on which one end of the first horizontal arm 13 is rotatably attached, and one end of the first horizontal arm 13 is attached to the flat part with a bolt 20 and a nut 21.
At this time, the pulley 22 and the gear 23 are also attached coaxially, so that the rotation of the gear 17 is transmitted to the gear 23. A partial gear 25 having a pulley 24 coaxially is rotatably attached to the other end of the first horizontal arm 13, and the rotation of the pulley 22 is transmitted to the pulley 24 via a belt 26. It is becoming more and more like this. Gears 27, 28, 29, 30 are provided around this partial gear with pulley 25, and as will be described later, the first horizontal arm 13
In a certain rotation angle range, the rotation of the partial gear 25 with a pulley is directly transmitted to the gear 27, that is, the gear 30,
29, 28, and in other rotation angle ranges, the gear 2 is transmitted via 30, 29, 28.
7, and rotates the gear 27 in the opposite direction compared to when it is directly transmitted to the gear 27. FIG. 4 is a plan view for explaining the relationship between the partial gear 25 with a pulley and the gears 27 to 30, and the partial gear 25 with a pulley has approximately 12 mm as shown.
A partial gear 25 with a pulley is provided over an angular range of 0, and in the illustrated state, the partial gear 25 and 27 with a pulley mesh with each other, and the gear 27 rotates in a direction opposite to the rotational direction of the partial gear 25 with a pulley. When the partial gear 25 with a pulley further rotates, the engagement between the partial gears 25 and 27 with a pulley is released, and the partial gear 25 with a pulley and the gear 30 mesh with each other, and the rotation of the partial gear 25 with a pulley is caused by the rotation of the partial gear 25 with a pulley. 28
The signal is transmitted to the gear 27 via the gear 27, and the gear 27 rotates in the opposite direction. The rotation of the gear 27 is on the vertical axis 31
to one end of the second horizontal arm 14, and then to the work table 12 via a vertical shaft 32 provided at the other end of the second horizontal arm 14.
transmitted to. That is, when the gear motor 15 is rotated, the gear 17 is rotated, and the rotation is caused by the rotation of the gear 23.
The rotation of the first horizontal arm 13 is transmitted to the pulley-equipped partial gear 25 via the belt 26, and the first horizontal arm 13 is rotated. In a certain rotation angle range (for example, 120) of the arm 13, the rotation of the partial gear 25 with a pulley is directly transmitted to the gear 27, and in another rotation angle range (for example, 120), the rotation of the partial gear 25 with a pulley is transmitted to the gear 30, It is transmitted to gear 27 via 29 and 28, and this time rotates gear 27 in the opposite direction. That is, in FIG. 1, when the work table 12 is located between 12 and 12' and moves from the position 12 to the position 12', the partial gear 25 with pulley and the gear 27 are engaged. In the range, when the first horizontal arm 13 moves in the direction of arrow A, the second horizontal arm 14 moves counterclockwise in the direction of arrow B, and the work table 12 moves in the direction of arrow C. Next, the work table 12 is 12'
and 12'', and when moving from the 12' position to the 12'' position, the rotation of the partial gear 25 with a pulley is transmitted to the gear 27 via the gears 30, 29, and 28, and the gear 27 The first
When the horizontal arm 13 of is moved in the direction of arrow A,
The second horizontal arm 14 is rotated in the direction of arrow B' (rotation direction opposite to direction B=clockwise), and work table 12 is also moved in direction C. When moving the work table 12 from the 12'' position to the 12' position and back to the 12 position, the work table 12 is moved in the D direction through the reverse route.

Although the above example has been shown in which the pulley 22 is rotated integrally by the gear 23, as shown in FIG.
a and 17b, and the gear 23 is composed of gears 23a and 23b.
By engaging the gears 17b and 23b, the rotational speed of the gears 23a and 23b can be changed.
The rotation speed of the second horizontal arm 14 and the rotation speed of the second horizontal arm 14 can be changed separately, and the work table 12 can be moved while maintaining a desired speed and positional relationship.

Effects As is clear from the above explanation, according to the present invention, by rotating the gear motor 15 forward and backward, the work table 12 can be moved back and forth parallel to the chair, so the work table can be remotely controlled. Furthermore, the work table does not require extra space to move, and the work table can be moved without changing its positional relationship, making treatment work very easy. Furthermore, when the treatment chair is raised and lowered, the work table is automatically moved to a desired position in accordance with the raising and lowering of the treatment chair,
When the patient gets on and off the treatment chair, by pressing a predetermined switch, the work table can be moved to a desired position where it does not interfere with getting on and off the treatment chair, allowing efficient treatment work.

[Brief explanation of the drawing]

FIG. 1 is a plan view for explaining an embodiment of the dental table moving mechanism according to the present invention, FIG. 2 is a perspective view of the main parts, FIG. 3 is an exploded view, and FIG.
FIG. 5 is a detailed plan view of the vicinity of the gear 25, and FIG. 5 is a configuration diagram of main parts for explaining a modified embodiment of the present invention. FIG. 6 is a configuration diagram for explaining an example of a conventional work table moving mechanism. be. DESCRIPTION OF SYMBOLS 11...Chair side fixing part, 12...Work table, 13...First horizontal arm, 14...Second horizontal arm, 15...Gear motor, 22, 24...
...Pulley, 26...Belt, 22, 25, 27,
28, 29, 30...gears.

Claims (1)

[Scope of utility model registration request] a first horizontal arm having one end rotatably pivoted to the chair-side fixing part; a pulley concentric with the rotatable shaft disposed at one end of the first horizontal arm; A partial gear with a pulley that is disposed on the other end side of the horizontal arm of 1 and transmits the rotation of the pulley via a belt, a plurality of gears that engage with the partial gear with a pulley, and one of the plurality of gears. Any one
a second horizontal arm having one end fixed to the vertical shaft and the other end fixed to the work table, when the first horizontal arm is rotated; In a certain angular range, the partial gear with a pulley meshes with one of the plurality of gears to rotate the second horizontal arm in one positive direction, and in another angular range, the partial gear with a pulley meshes with one of the plurality of gears, and the second horizontal arm is rotated in one positive direction. A dental table moving mechanism, characterized in that it is rotated in the opposite direction by meshing with another gear of the plurality of gears.