JPH0346754Y2 - - 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. 4 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 very inconvenient.

Purpose The present invention was made in order to solve the above-mentioned drawbacks of the conventional technology, and provides a work table moving mechanism that can move the work table parallel to the chair and can extend the distance of movement. It was made for the purpose of providing.

Configuration Fig. 1 is a plan view for explaining one embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is a perspective view of main parts,
Figure 4 is an explanatory diagram of rotation transmission, in which 10 is a fixed table, 20 is a work table, and fixed table 1
0 is fixed relative to chair 1, for example. 1
Reference numerals 1 and 12 denote a pair of side plates, on which a guide 14 for horizontally moving a movable body 13 that supports and moves a work table 20 is fixedly installed, and a threaded rod 15 is rotatably supported in parallel with the guide 14. are doing. Inside the movable body 13, a threaded rod 15 is screwed into an insertion hole (not shown) through which the guide 14 is inserted and guided.
A female screw (not shown) is drilled through which the movable body 13 is horizontally moved by rotation of 5, and a shaft 16, which rotatably supports the work table 20 and is a part of the rotation transmission mechanism described later, is fixed in the upper part. It is set up. The axis 1
6 is provided with a horizontal arm 17 that rotates around an axis, and a shaft 19 that is rotated by a rotation transmission mechanism or manually is fitted to one end of the horizontal arm 17. The other end on the opposite side is sandwiched between stoppers 40 and 41 which are fixed in parallel to the guide 14 near the inner side of the side plates 11 and 12 arranged on the fixed table. It has a length that makes contact with. The shaft 19 is constructed integrally with the vertical shaft 18, for example, and a work table 20 is rotatably disposed at the other end. Further, the threaded rod 15 is arranged on the fixed table 1 and is rotationally driven by the rotation of a motor 30 that can rotate in forward and reverse directions, and the rotation is transmitted by being supported by a pulley 31 inserted into the motor shaft and the side plate 11. This is accomplished by a pulley 33 inserted into one end of a threaded rod 15 and a belt 32 stretched between these pulleys 31 and 33. In the above configuration, when the motor 30 is rotated now, the threaded rod 15 is rotated by the rotation of the motor 30, and the movable body 13 is translated in the direction of arrow A. At this time, the work table 20 is rotated.
moves horizontally while maintaining the illustrated posture _P1 . As the movable body 13 approaches the side plate 12, the tip of the horizontal arm 17 comes into contact with the stopper 40, and the horizontal arm 17
rotates clockwise around the shaft 16 to reach the state _P3 , and in this state, the movable body 13 comes into contact with the side plate 12, stops the motor by operating a switch (not shown), and moves the work table 20 in the direction of arrow A. movement will stop. Thereafter, the work table 20 can be electrically or manually rotated around the axis 19 to take the posture _P2 shown by the broken line.

Effects As is clear from the above explanation, according to the present invention, the horizontal arm 17 is moved between the stoppers 40 and 41 by the movable body 13, and by rotating the arm when it hits these stoppers, the fixed table Reduce the upper movement, and
The travel distance of the work table can be increased.

[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 front view, Fig. 3 is a perspective view of main parts, and Fig. 4 is a conventional work table moving mechanism. FIG. 3 is a configuration diagram for explaining an example of a mechanism. 10... Fixed table, 11, 12... Side plate,
13... Moving body, 14... Guide, 15... Threaded rod, 16... Rotating shaft, 17... Horizontal arm, 18
... Vertical axis, 20 ... Work table, 30 ...
Motor, 40, 41...stop.

Claims (1)

[Scope of utility model registration request] a moving body that moves on a fixed table fixed to a dental treatment chair in a direction parallel to the dental treatment chair;
a pair of stoppers bored at both ends of the fixed table; a horizontal arm rotatably disposed on the movable body; and a work table rotatably disposed at one end of the horizontal arm. and a drive mechanism for moving the movable body, and the horizontal arm has an end opposite to the end on the side where the work table is arranged extending from the rotation axis of the movable body. . A dental table moving mechanism, wherein the extension part contacts the stopper, and after the extension part contacts the stopper, the horizontal arm rotates.