JPH0342915Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a moving device such as a movable table,
The present invention relates to a moving device such as a movable table that can stably and smoothly support and move the movable cart on a track.

(Prior art) Conventionally, as a moving device for a movable table, two shafts are arranged side by side on a stem that stands up from a dental unit base, etc., and the two shafts are slid on a moving cart having two through holes. It is known that the shaft is configured so that it can be inserted freely and moved freely in the axial direction of the shaft.
Publication No. 26527).

(Problem to be Solved by the Invention) However, when the movable cart is inserted into the through-holes of the two parallel shafts of the conventional device and moved, the two shafts must be aligned with precise parallelism. Unless the through hole is provided so that it substantially matches the outer diameter of the shaft, stable and smooth movement of the mobile cart will be difficult.

The reason is that when the distance between the two shafts becomes different in the middle, the central axis of the through hole and the central axis of the shaft become misaligned, and as a result, large braking friction acts between them. On the other hand, in order to avoid this, if we try to eliminate the braking friction by making the through hole larger and loosening the sliding movement with the shaft, backlash etc. will occur, making it difficult to smoothly support and move the mobile cart. This is because it becomes impossible to do so.

Therefore, in order to support and move the mobile cart stably and smoothly, it is necessary to install two shafts in parallel with accurate parallelism and with the diameter of the through hole equal to the diameter of the shaft. However, it is difficult to arrange two shafts in parallel with such precision in terms of manufacturing.

In addition, if the load of a movable table, etc. is applied unevenly to the end of the moving cart, upward stress will be applied to the outer side facing the load side, and the shaft will be lifted upward and curved, causing the moving cart to stable and smooth movement of the vehicle cannot be guaranteed.

(Means for solving the problems) The present invention has been made in view of the above problems.
A moving device such as a movable table that ensures stable and smooth support and movement of a movable cart, that is, a moving device such as a movable table that is equipped with a movable cart to which the base end of the movable table is attached and a track. , the movable trolley supports a movable table, etc. so as to receive an unbalanced load of the movable table, etc. inward, and is provided with an inner wheel and an outer wheel at its lower part, and the track is arranged on the lower surface of the inner wheel. and an outer track consisting of an upper track and a lower track provided opposite the lower and upper surfaces of the outer wheel, and the distance between the upper track and the lower track of the outer wheel is set as above. This is a moving device for a movable table, etc., characterized by being slightly longer than the diameter of the outer wheels.

In the device of the present invention, the outer track is composed of an upper track and a lower track, and the outer wheels of the moving truck are positioned between them.

The reason for this configuration is that, as shown in Fig. 3, the movable trolley 2, on which the load of the table, etc. attached to the upper side by the arm 5 is biased inward, is constructed of inner and outer tracks. Simple support mechanism 1
In order to support the movable trolley 2 easily by a and 1b, and even if there are ups and downs on the track, the movable trolley 2 is subjected to frictional resistance due to the following operating reasons.
This is to ensure that the movement of the

That is, in the device of the present invention, the inner wheels 2a of the movable trolley 2 and the inner track 1a are in contact with each other, and the outer wheels 2a' and the upper track 1b of the outer track are in contact with each other, and the outer wheels 2a' and the outer track are in contact with each other. There is a slight gap between the lower track 1a' and the two are in a non-contact state, but if there are undulations on the track midway, the undulations by the slight distance can be absorbed, and the stability of the movable trolley 2 is improved. This is because smooth movement can be ensured.

Further, it is usually preferable to arrange two or more pairs of inner wheels 2a and outer wheels 2a' of the movable cart in the device of the present invention, one behind the other, thereby completely preventing the movable cart from tilting in the front-back direction during movement.

In order to prevent the movable trolley 2 from coming off the track or swinging laterally, the inner track 2a may be formed into a slightly depressed groove shape instead of being flat, for example.

Furthermore, in order to completely prevent the movable dolly 2 from coming off the track or shaking sideways during movement, for example, the movable dolly support track 1c should be sandwiched between the movable dolly support track 1c and the lower surface of the movable dolly. Rotating bodies 2d, 2d', 2c, 2 that come into sliding contact with the track
It is preferable to provide c'.

The rotary body may be, for example, one composed of at least one pair of vertical shafts 2e, 2e' and rollers 2c, 2c' fitted therein.

In this way, when the load of the movable table or the like is biasedly applied to the end portion of the movable dolly, the movable dolly can be moved stably and smoothly.

Further, the outer raceway may be assembled by fixing the side part of the upper raceway to the upper surface of a support that is erected on the side of the lower raceway, or the outer raceway may be constructed with a U-shaped cross section. good.

(Example) An example of the device of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view showing the main parts of a moving device such as a movable table that is an embodiment of the present invention, and FIG. 2 is an external view showing the case where the present invention is applied to a dental unit.
Figure 3 is a partially enlarged cross-sectional view of the moving trolley in Figure 2;
FIG. 4 is a partially enlarged bottom view of the movable cart shown in FIG. 2.

In FIGS. 2 and 3, 1 is a floor surface, and the side floor surface, which is the moving direction of the movable table 4, etc., has an inner raceway 1a polished to a smooth surface and an outer surface cut into a groove shape. The upper surfaces of the tracks 1a' are arranged in parallel.

Above the lower track 1a', there is provided an upper track 1b fixed to a plurality of upright supports 1b'.

Note that there is a slight gap between the outer wheel 2a' and the lower track 1a', and they are not in constant contact with each other.

Further, in the center of the inner track 1a and the lower track 1a', there is a movable bogie support track 1 for preventing derailment and rolling.
b has been installed.

Reference numeral 2 denotes a mobile cart, and on its lower surface there are two pairs of freely rotatable wheels 2a, 2a', 2 supported by a shaft.
b and 2b' are arranged opposite to each other.

Furthermore, in the center of the lower surface, there is a vertical shaft 2.
Rollers 2c, 2c', 2d, 2d' (Figs. 3 and 4) having bearings etc. on e, 2e', 2f, and 2f' face each other on both sides of the movable trolley support track 1c so as to sandwich them. It is mounted on the shaft.

In this example, when the load of the movable table 4 etc. is concentrated on the end of the movable trolley 2, a rotatable inner wheel 2 pivoted on the side of the movable trolley 2 is used.
a and 2b slide and rotate on the inner track 1a and the upper track 1b to support the movable trolley 2.

Note that the outer raceway 1a' cut into the floor surface 1 does not normally come into contact with the outer wheel 2a'.

Next, FIG. 2 shows a case where the embodiment of the present invention is applied to a dental unit 3.

A movable trolley 2 consisting of the above-mentioned track and a movable trolley 2 is attached to the side of the dental unit mounting base, which is the floor surface 1, and a movable table 4 is attached to the movable trolley 2 via an arm 5.

As explained in detail above, the device of the present invention can be used not only as a device for moving the movable table of a dental unit, but also widely applicable to other movable tables where the load is concentrated on the side of the movable cart. can.

(Effects of the invention) As detailed above, the present invention provides a moving device for a movable table, etc., which includes a movable cart to which the base end of the movable table, etc. is attached, and a track. It supports a movable table, etc. so as to receive unbalanced loads inward, and has an inner wheel and an outer wheel at the bottom.
The track is composed of an inner track laid on the lower surface of the inner wheel, and an outer track consisting of an upper track and a lower track provided opposite the lower and upper surfaces of the outer wheel, and Since the distance between the upper track and the lower track is set to be slightly longer than the diameter of the outer wheel, a simple support mechanism consisting of the inner and outer tracks can be used to support the moving trolley, which has loads such as tables biased towards the inside. Can be easily supported in a movable manner.

Moreover, even if there are ups and downs along the track, the movement of the mobile cart is not hindered, and stable and smooth movement can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of a moving device such as a movable table that is an embodiment of the present invention, and FIG. 2 is an external view showing the case where the present invention is applied to a dental unit.
Figure 3 is a partially enlarged cross-sectional view of the moving trolley in Figure 2;
FIG. 4 is a partially enlarged bottom view of the movable cart shown in FIG. 2. 1...Floor surface, 1a...Inner track, 1a'...Outer track, 1b...Top track, 1b'...Column, 1c...
...Moving trolley support track, 2...Moving trolley, 2a, 2
b...Inner wheel, 2a', 2b'...Outer wheel, 2
c, 2c', 2d, 2d'... roller, 3... dental unit, 4... movable table, 5... arm.

Claims (1)

[Claims for Utility Model Registration] (1) In a moving device such as a movable table, etc., comprising a movable trolley to which the base end of the movable table, etc. is attached, and a track, the movable trolley is configured to carry an unbalanced load of the movable table, etc. It supports a movable table etc. by receiving it inward, and has an inner wheel and an outer wheel at its lower part, and the track is
an inner track laid on the lower surface of the inner wheel;
An outer track consisting of an upper track and a lower track provided opposite the lower and upper surfaces of the outer wheel, and the interval between the upper track and the lower track of the outer track is slightly longer than the diameter of the outer wheel. A moving device such as a movable table, characterized by: (2) A moving device such as a movable table is characterized in that it includes a movable trolley support track and a rotating body that is located on the lower surface of the movable trolley and slides into sliding contact with the track so as to sandwich the movable trolley support track. A utility model registration claim 1 for moving and mounting a movable table, etc. (3) The movable table, etc. as set forth in claim 1 or 2 of the utility model registration claim, wherein the outer track is constructed by constructing an upper track and a lower track via supports. Mobile device. (4) The movable table, etc. according to claim 2 or 3 of the utility model registration claim, wherein the rotating body comprises at least one pair of vertical shafts and a roller fitted thereto. mobile device.