JPH0735156Y2 - Slider device - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to a slider device,
More specifically, the present invention relates to a slider device having a plurality of screw shafts and a slider, and having a function of moving a corresponding slider by rotation of the screw shafts.

[0002]

2. Description of the Related Art Conventionally, a device has been widely used in which a slider is moved to a target position, stopped and held there, and a predetermined work is performed in that state. .

In this case, the slider is normally moved by a feed action by rotation of a screw shaft, but in the case of a device having a plurality of sliders and moving them independently,
As many screw shafts and motors etc. as drive sources are provided corresponding to each slider, and each screw shaft is rotated by a correspondingly provided motor etc. via a drive mechanism. The reality is that they are moved independently.

However, in this case, a number of drive sources and drive mechanisms such as motors corresponding to the respective sliders are required, resulting in a large scale device and high cost.

In addition, in the case of this type of device, the braking force for stopping / holding the slider at the target position tends to be insufficient, or it is difficult to properly set the driving force of the motor or the like. is there.

Conventionally, in this type of device, a brake mechanism for holding the slider at a target stop position is not specially provided, and a brake built in a motor or the like is generally used as it is. , In this case, the braking force is
Since it is determined according to the driving force of the slider, the holding force for the slider is often insufficient.

For example, when the slider is moved, it is often moved in an empty state, that is, when nothing is placed on the slider. In this case, the load applied to the slider is small, so that a motor with a small driving force is sufficient. However, on the other hand, if an object is placed on the slider at a fixed position, the load on the slider will increase, and the brake provided in a small motor or the like will have the disadvantage that the braking force and holding force will be insufficient. is there.

[0008]

The device of the present invention has been devised to solve such a problem, and its gist is (a) a drive source and (b) the drive source. A drive shaft that is directly driven to rotate; (c) a plurality of screw shafts that are provided so as to be connectable to and disconnectable from the drive shaft and that are rotated by receiving drive force from the drive shaft in the connected state; A plurality of sliders which are arranged corresponding to a plurality of screw shafts and are slid in the same direction or different directions by a feeding action based on the rotation of the corresponding screw shafts; and (e) fixed to the drive shaft. A drive gear and a first driven gear fitted to the screw shaft such that they cannot rotate relative to each other and are relatively movable in the axial direction thereof, and directly with the drive gear when the first driven gear moves. The drive by mechanical or indirect engagement or disengagement. A plurality of coupling / releasing mechanisms that operatively couple or uncouple the shaft and the screw shaft; A second driven gear, and a brake mechanism that is provided in a fixed state and includes a fixed gear that meshes with the second driven gear when the connection is released, and that locks the corresponding screw shaft based on the meshing of the gears. (G) A moving means for moving the first and second driven gears in the axial direction of the corresponding screw shaft to operate the coupling / releasing mechanism and the brake mechanism.

[0009]

In the device of the present invention, one of the plurality of connecting / disconnecting mechanisms works to bring the drive shaft and the corresponding screw shaft into a connected state.

In this state, the driving force from the drive shaft is transmitted to the screw shaft to rotate the screw shaft, and the corresponding slider is slid by the screw feeding action of the screw shaft. Then, when the target position is reached, the coupling / releasing mechanism performs the releasing operation, specifically, the first driven gear is disengaged from the drive gear, and the transmission of the driving force from the drive shaft is cut off.

At the same time, the brake mechanism works to mesh the second driven gear with the fixed gear to prevent the screw shaft from rotating, and hold the slider in a stopped state at the target position.

In the device of the present invention, these operations are performed for each of the plurality of screw shafts, and each screw shaft receives the driving force from the single drive source and is rotated independently of each other. The corresponding slider is slid and moved, and stopped and held at each target position.

As described above, in the device of the present invention, each of the plurality of sliders is driven by the driving force from the common driving source. Therefore, according to the present invention, the device can be made compact and the cost can be reduced.

Further, since the rotation of the screw shaft and the movement of the slider are prevented based on the meshing of the gears, a large braking force can be obtained, and a brake built in a drive source such as a motor. Since it is not necessary to use, the driving force of the motor or the like can be properly set separately from the braking force.

Further, since the slider is stopped at the target position based on the meshing of the gears, it has the feature that the reproducibility of the stop position is good.

According to the present invention, it is possible to accurately stop the slider at the same position as the previous time by engaging the gears in the brake mechanism with the same meshing teeth as when the brake was stopped last time.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 2, reference numeral 10 is a main body of the apparatus, on which the first, second and third sliders 12, 14, 1 are mounted.
6 are provided.

The first and second sliders 12 and 14 are provided so as to be movable in the same direction on a common guide rail 18 laid on the main body 10, and the third slider 16 is a first slider. A guide rail 20 provided on the slider 12 is movable in a direction perpendicular to the first and second sliders 12 and 14.

A motor 22 is provided on the first slider 12, and a drive bevel gear 26 is fixed upward on a drive shaft 24 of the motor 22. Three first, second, and third screw shafts 28, 30, and 32 extend from the first slider 12 in opposite directions or in directions different from each other by 90 degrees. Second slider 1
4, screwed to the third slider 16.

A first driven bevel gear 36 is provided at the tip of each of the screw shafts 28, 30, 32 so as not to rotate relative to each of the screw shafts 28, 30, 32 and to move relative to the axial direction. .

That is, in this apparatus, the drive bevel gear 26 on the drive shaft 24 meshes with the first driven bevel gears 36 of the screw shafts 28, 30, 32 by the movement of the first driven bevel gears 36. Drive shaft 24 and each screw shaft 2
8, 30, 32 are connected to each other, or the gears are disengaged from each other to release the connection.

In the case of the device of this example, the screw shaft 28 is the drive shaft 2.
4 is connected to the guide rail 18 by the screw feed action of the screw shaft 28.
The third slider 16 is slid in the same direction as above, together with the first slider 12.

On the other hand, when the screw shaft 30 is connected to the drive shaft 24, the second slider 14 is independently moved in the left-right direction on the guide rail 18 by the feeding action of the screw shaft 30.

Alternatively, the third screw shaft 32 may be the drive shaft 24.
, The third slider 16 is moved in the direction perpendicular to the moving direction of the first and second sliders 12 and 14 by the feeding action of the third screw shaft 32. Then, at the target position, it is held in a stopped state by the brake mechanism. The braking action of this braking mechanism will be described in detail later.

1 and 3 show an example in which two screw shafts orthogonal to each other are driven by the same drive motor. In these figures, 38 and 40 are the first and second screw shafts,
One end side of each is rotatably held by the holding body 42, and is screwed to the first slider 44 and the second slider 46 at the screwing portion 34.

As shown in FIG. 1, a first driven bevel gear 36 and a second driven bevel gear 48 rotate on the screw shafts 38, 40 in opposite directions to each other and rotate relative to the screw shafts 38, 40. Impossible, it is fitted so that it can move relative to the axial direction. A fixed gear 54 is provided on the holding body 42 so as to face the second driven bevel gear 48.

The above-mentioned first and second driven bevel gears 36 and 4
8 is operatively connected to a switching cylinder 52 via a connecting plate 50, by which the first and second driven bevel gears 36 and 48 are respectively fixed to the drive bevel gear 26 on the drive shaft 24 and the fixed gear. 54 and 54 are engaged with each other.

In the case of the apparatus of this example, the first and second driven bevel gears 36 and 48 on the first screw shaft 38 are the switching cylinders 5.
When pushed out to the left by 2 in the figure, the drive bevel gear 26 on the drive shaft 24 and the first driven bevel gear 36 mesh with each other to connect the drive shaft 24 and the first screw shaft 38.

Therefore, in this state, the driving force from the driving shaft 24 is transmitted to the first screw shaft 38, and the slider 44 is slid by the screw feeding action.

On the other hand, the first and second driven bevel gears 36 and 48
When the switch cylinder 52 is pulled rightward in the figure, the second driven bevel gear 48 meshes with the fixed gear 54, and the first driven bevel gear 36 moves the drive bevel gear 26.
Will be in a state of being separated from. That is, the connection between the drive shaft 24 and the first screw shaft 38 is released, and at the same time, the brake mechanism operates and the first screw shaft 38 is prevented from rotating.

At this time, the first on the second screw shaft 40,
The second driven bevel gears 36 and 48 are pushed out by the switching cylinder 52, so that the second screw shaft 40 and the drive shaft 24
And are connected, and the driving force of the driving shaft is transmitted to the second screw shaft 40. As a result, the second slider 46 is guided by a guide rail (not shown) and slidably moved.

As described above, in the device of this embodiment, a plurality of screw shafts and sliders can be driven by a single drive source, and the device can be made compact and inexpensive. Further, since the brake mechanism corresponding to each slider is separately provided, the driving force and the braking force of the drive source can be separately set appropriately.

Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, in the present invention, a single drive source can drive three or more screw shafts, and the device of the present invention can be applied to various uses.

[Brief description of drawings]

FIG. 1 is a diagram of a slider device according to an embodiment of the present invention.

FIG. 2 is a diagram of a slider device according to another embodiment of the present invention.

FIG. 3 is a perspective view of a main part of the slider device shown in FIG.

[Explanation of symbols]

 12, 14, 16, 44, 46 Slider 22 Motor 24 Drive shaft 26 Drive bevel gear 28, 30, 32, 38, 40 Screw shaft 36 First driven bevel gear 48 Second driven bevel gear 52 Switching cylinder 54 Fixed gear

Claims (1)

[Scope of utility model registration request] 1. A drive source, (b) a drive shaft that is directly driven to rotate by the drive source, and (c) a drive shaft that is connectable / separable from the drive shaft. A plurality of screw shafts that are rotated by receiving a driving force and (d) are arranged corresponding to these plurality of screw shafts, and slide in the same direction or different directions by the feeding action based on the rotation of each corresponding screw shaft. A plurality of sliders to be moved; and (e) a drive gear fixed to the drive shaft and a first driven gear fitted to the screw shaft such that they cannot rotate relative to each other but can move relative to each other in the axial direction. , A plurality of coupling / releasing mechanisms for operatively coupling or uncoupling the drive shaft and the screw shaft by direct or indirect engagement or disengagement with the drive gear as the first driven gear moves And (f) that of the plurality of screw shafts It includes a second driven gear that is relatively non-rotatable and relatively movable in the axial direction thereof, and a fixed gear that is provided in a fixed state and that meshes with the second driven gear when the connection is released. A brake mechanism for preventing rotation of the corresponding screw shaft based on meshing, and (g) moving the first and second driven gears in the axial direction of the corresponding screw shaft to activate the coupling / releasing mechanism and the brake mechanism. A slider device comprising: a moving unit.