JPH0616754U - Slider device - Google Patents

Abstract

(57) [Abstract] [Object] An object of the present invention is to provide a slider device having a plurality of sliders that can move independently of each other, having a simple structure, and being inexpensive. [Structure] A drive shaft 2 that outputs a drive force from a drive source 22.
4 is fixed with a bevel gear 26, while a plurality of sliders 4
4 and 46 are moved by the screw feeding action of the corresponding screw shafts 38 and 40, and the screw shafts 38 and 40 and the drive shaft 24 are fixedly mounted on the drive shafts. , Bevel gear 3 movably provided on
6 and 6 are coupled to each other by a coupling / releasing mechanism to transmit the driving force. Further, the screw shaft that is disconnected from the drive shaft 24 is prevented from rotating based on the meshing of the gears of the brake mechanism including the fixed gear 54 and the second driven bevel gear 48, and the corresponding slider is stopped. Hold on.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slider device, and more particularly to a slider device having a plurality of screw shafts and sliders, and having a function of moving the corresponding sliders by rotation of the screw shafts.

[0002]

[Problems to be solved by conventional techniques and devices]

 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, it corresponds to each slider. A number of screw shafts and a motor as a drive source are provided, and each screw shaft is rotated through a drive mechanism by a correspondingly provided motor, etc., so that each slider is independently moved. The reality is that they are allowed to do so.

However, in this case, a drive source and a drive mechanism such as motors are required in a number corresponding to the respective sliders, 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. There is.

Conventionally, in this type of device, a break 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. However, in this case, since the braking force is determined in correspondence with the driving force of the motor or the like, there is a disadvantage that 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, since the load applied to the slider is small, a motor having a small driving force is used. 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 braking force and holding force will be insufficient with a brake equipped on a small motor, etc. Will occur.

[0008]

[Means for Solving the Problems]

 The device of the present invention has been devised to solve such a problem, and its gist is (a) a drive source, and (b) a drive shaft directly rotated by the drive source, (C) A plurality of screw shafts that are provided so as to be connectable / separable to / from the drive shaft and that are rotated by receiving the drive force from the drive shaft in the connected state; and (d) Corresponding to the plurality of screw shafts. A plurality of sliders, which are slidably moved in the same direction or in different directions by a feeding action based on the rotation of the corresponding screw shafts; (e) a drive gear fixed to the drive shaft; A direct driven gear that includes a first driven gear fitted to each of the screw shafts such that they cannot rotate relative to each other and is relatively movable in the axial direction thereof, and directly or indirectly meshes with the drive gear as the first driven gear moves. Or actuating the drive shaft and the screw shaft by releasing the mesh A plurality of coupling / releasing mechanisms for coupling or uncoupling with each other; and (f) a second driven gear that is provided on each of the plurality of screw shafts such that they cannot rotate relative to each other and can move relative to each other in the axial direction thereof. A brake mechanism that is provided in a fixed state and that includes a fixed gear that meshes with the second driven gear when the connection is released, and that prevents rotation of the corresponding screw shaft based on the meshing of the gears; And moving means for moving the second driven gear in the axial direction of the corresponding screw shaft to operate the coupling / releasing mechanism and the brake mechanism.

[0009]

[Action and effect of the device]

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

In this state, the driving force from the drive shaft is transmitted to the screw shaft, the screw shaft is rotated, 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 a releasing operation, specifically, the first driven gear is disengaged from the drive gear to cut off the transmission of the driving force from the drive shaft.

At the same time, the brake mechanism works to mesh the second driven gear with the fixed gear to prevent rotation of the screw shaft, 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.

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

Further, since the slider is stopped at the target position based on the meshing of the gears, it has a feature that the reproducibility of the stop position is also 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 of the brake mechanism with the same meshing teeth as when the brake was stopped last time.

[0017]

【Example】

 Next, an embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 2, reference numeral 10 denotes a main body of the apparatus, on which the first, second and third sliders 12, 14, 16 are arranged.

The first and second sliders 12, 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 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 in 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 directions opposite to each other or in directions different from each other by 90 degrees. 10, the second slider 14, and the third slider 16 are screwed together.

A first driven bevel gear 36 is provided at the tip of each of the screw shafts 28, 30, 32 so as not to be rotatable relative to the screw shafts 28, 30, 32 and relatively movable in the axial direction. There is.

That is, in this device, the drive bevel gear 26 on the drive shaft 24 meshes with the first driven bevel gear 36 of each screw shaft 28, 30, 32 by the movement of the first driven bevel gear 36, and thus, The drive shaft 24 and the screw shafts 28, 30, 32 are connected to each other, or the gears are disengaged from each other so that the connection is released.

In the case of the device of the present example, when the screw shaft 28 is connected to the drive shaft 24, the first and second sliders 12 and 14 move on the guide rail 18 by the screw feeding action of the screw shaft 28. The third slider 16 is slid together with the first slider 12 in the same direction.

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

FIGS. 1 and 3 show an example in which two screw shafts orthogonal to each other are driven by the same drive motor. In these drawings, reference numerals 38 and 40 denote first and second screw shafts, one end side of which is rotatably held by a holding body 42, and the screwing portion 34 has a first slider 44 and a second slider 46. It is screwed to.

As shown in FIG. 1, the first driven bevel gear 36 and the second driven bevel gear 48 are opposite to each other in the respective screw shafts 38, 40 and are in phase with respect to the screw shafts 38, 40. It is mounted so that it cannot rotate and can move relative to the axial direction. Further, the holding body 42 is provided with a fixed gear 54 so as to face the second driven bevel gear 48.

The first and second driven bevel gears 36, 48 are operatively connected to the switching cylinder 52 via a connecting plate 50, and the first and second driven bevel gears 36, 48 are connected by the cylinder. Are selectively meshed with the drive bevel gear 26 and the fixed gear 54 on the drive shaft 24, respectively.

In the case of the device of the present example, when the first and second driven bevel gears 36 and 48 on the first screw shaft 38 are pushed to the left in the figure by the switching cylinder 52, the drive bevel on the drive shaft 24 is driven. The bell gear 26 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, when the first and second driven bevel gears 36 and 48 are pulled rightward in the figure by the switching cylinder 52, the second driven bevel gear 48 meshes with the fixed gear 54, and the first driven bevel gear 36 is moved. Is separated from the drive bevel gear 26. 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 and second driven bevel gears 36, 48 on the second screw shaft 40 are pushed out by the switching cylinder 52, so that the second screw shaft 40 and the drive shaft 24 are connected to each other, The driving force of the drive shaft is transmitted to the second screw shaft 40. As a result, the second slider 46 is slid while being guided by a guide rail (not shown).

As described above, in the device of this example, 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.