JP5354489B2 - Slide drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slide drive device slide-driving a plurality of heads by one driving source and setting the pitch between heads in the plurality of heads with high flexibility. <P>SOLUTION: In the slide drive device 1, a fixed head 30 is connected to a movable head 31 by a bolt 303 and a nut 316. The movable head 31 is connected to a movable head 32 by a bolt 313 and a nut 236, and the movable head 32 is connected to a movable head 33 by a bolt 323 and a nut 336. A rotary driving force is transmitted to the bolts 303, 313 and 323 respectively through gears 301, 302, 311, 312, 321 and 322. The gear 301 is fixed to a shaft 21, and the gears 311 and 321 are slidable in the extending direction of the shaft 21. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a slide drive device, and more particularly to a slide drive device capable of slidingly driving a plurality of heads with a single drive source.

In a wide field such as production equipment and storage equipment, a slide driving device that slides a plurality of heads is used. For example, the slide driving device is used in a transfer device that holds a plurality of workpieces conveyed on a conveyor and changes the pitch between the workpieces and transfers the workpieces to another location.
In order to slide drive a plurality of heads, it is possible to employ a device having a drive source for each head. However, from the viewpoint of device size and cost, the number of drive sources can be as much as possible. One is desirable. For example, Patent Document 1 proposes a slide driving device that can slide-drive a plurality of heads with a single driving source and that can make the pitches of the heads the same during sliding.

The slide drive device proposed in Patent Document 1 employs a configuration in which a plurality of heads are connected to each other by an X-shaped link and a head located at an end is driven by a motor. In this way, in the slide drive device in which the plurality of heads are connected to each other by the X-shaped link, the plurality of heads can be slid and driven by the X-shaped link, and the same pitch is maintained. A plurality of heads can be slid and driven.
JP 2004-76770 A

  However, in the slide drive device proposed in Patent Document 1, since a plurality of heads are connected by X-shaped links, a slide drive mode can be adopted in addition to slide drive while maintaining an equal pitch. For example, the sliding drive cannot be performed so that only a part of the heads have different pitches. Therefore, the slide drive device proposed in Patent Document 1 cannot be configured with a high degree of freedom applied to the surrounding situation.

  The present invention has been made in order to solve the above-described problem, and allows a plurality of heads to be slid by a single drive source, and the pitch between the heads in the plurality of heads has a high degree of freedom. It is an object of the present invention to provide a slide drive device that can be set.

In order to achieve the above object, the present invention adopts the following configuration.
The slide drive device according to the present invention includes a base, a rotating shaft, a fixed portion, and first and second movable heads.
The base serves as a position reference in the slide drive device according to the present invention.
The rotating shaft is rotationally driven by receiving a rotational driving force.

The position of the fixing portion in the extending direction of the rotation axis is fixed to the base.
The first and second movable heads are provided to be slidable with respect to the base in a direction along the extending direction of the rotation axis.
In the slide drive device according to the present invention, the fixed portion and the first movable head are coupled by the first and second coupling members. The position of the first connecting member in the extending direction of the rotating shaft is fixed with respect to the fixed portion, and the first connecting member is rotated by receiving a rotational driving force from the rotating shaft, and the second connecting member is the first movable head. It is fixed to. The first connecting member and the second connecting member have one male screw, the other has a female screw corresponding to the male screw, and are connected to each other by screwing. The screwing depth between them changes according to the amount of rotation of the first connecting member.

  In the slide drive device according to the present invention, the first movable head and the second movable head are coupled by the third and fourth coupling members. The third connecting member is fixed with respect to the first movable head in the extending direction of the rotating shaft, and rotated by receiving a rotational driving force from the rotating shaft. The fourth connecting member is It is fixed to the movable head. The third connecting member and the fourth connecting member have one male screw, the other has a female screw corresponding to the male screw, and are connected to each other by screwing. The screwing depth between them changes according to the amount of rotation of the third connecting member.

  The slide drive device according to the present invention has the above-described configuration, and in the extending direction of the rotation shaft, the pitch between the fixed portion and the first movable head is screwed between the first connecting member and the second connecting member. Corresponding to the depth, the pitch between the first movable head and the second movable head corresponds to the screwing depth between the third connecting member and the fourth connecting member.

  In the slide drive device according to the present invention, the fixed portion and the first movable head are coupled by the first and second coupling members, and the first movable head and the second movable head are the third and fourth. It is connected by a connecting member. In the slide drive device according to the present invention, one of the first connecting member and the second connecting member has a male screw, and the other has a female screw corresponding thereto. The third connecting member and the fourth connecting member have the same configuration.

  In the slide drive device according to the present invention, the pitch between the fixed portion and the first movable head during driving, and the pitch between the first movable head and the second movable head are the first connecting members. And the second connecting member and the third connecting member and the fourth connecting member are respectively defined by the screwing depth. Therefore, in the slide drive device according to the present invention, the sliding direction and the sliding amount of the first movable head relative to the fixed portion are defined by the threading direction and the screw pitch of the first connecting member and the second connecting member. Similarly, the sliding direction and sliding amount of the second movable head with respect to the first movable head are defined by the threading direction and screw pitch of the third connecting member and the fourth connecting member.

Therefore, in the slide drive device according to the present invention, the plurality of heads can be slid by receiving the rotational driving force from one drive source, and the pitch between the heads in the plurality of heads can be increased with a high degree of freedom. Can be set.
In the slide drive device according to the present invention, even when three or more movable heads are provided, the movable heads can be driven to slide in the same manner as described above by using the same coupling mechanism.

In the slide drive device according to the present invention, the following variations can be employed as an example.
In the slide drive device according to the present invention, the first gear is attached to the first connecting member, and the second gear that meshes with the first gear is attached to the rotating shaft. And by this structure, the rotational driving force of a rotating shaft is transmitted to a 1st connection member via a 1st gear and a 2nd gear. Similarly, a third gear is attached to the third connecting member, and the third gear meshes with the third gear and slides in the extending direction of the rotating shaft in conjunction with the first movable head. Install the gear. With this configuration, the rotational driving force of the rotating shaft is transmitted to the third connecting member via the third gear and the fourth gear.

In addition to the above, in the slide drive device according to the present invention, a pulley and a belt can be used to transmit the rotational driving force between the rotary shaft, the first connecting member, and the third connecting member.
In the slide drive device according to the present invention, one guide rail is provided along the extending direction of the rotation shaft, and the first movable head and the second movable head are both slidable on the guide rail. It is possible to adopt a configuration such as

  In the slide drive device according to the present invention, the threading direction in the first connecting member and the second connecting member is the same as the threading direction in the third connecting member and the fourth connecting member. A configuration can be employed. When such a configuration is employed, the first movable head and the second movable head are slid in the same direction according to the rotational driving force from the driving source.

  In the slide drive device according to the present invention, the threading direction in the first connecting member and the second connecting member is opposite to the threading direction in the third connecting member and the fourth connecting member. be able to. When such a configuration is adopted, the first movable head and the second movable head are slid in the opposite directions in accordance with the rotational driving force from the driving source.

  In the slide drive device according to the present invention, the screw pitch in the first connecting member and the second connecting member and the screw pitch in the third connecting member and the fourth connecting member can be made the same. When such a configuration is employed, the sliding amount of the first movable head relative to the fixed portion and the sliding amount of the second movable head relative to the first movable head can be made the same.

  In the slide drive device according to the present invention, the screw pitch in the first connecting member and the second connecting member can be different from the screw pitch in the third connecting member and the fourth connecting member. When such a configuration is adopted, the sliding amount of the first movable head relative to the fixed portion can be made different from the sliding amount of the second movable head relative to the first movable head. For example, when the screw pitch in the first connecting member and the second connecting member is made larger than the screw pitch in the third connecting member and the fourth connecting member, the sliding amount of the first movable head with respect to the fixed portion is set. The sliding amount of the second movable head relative to the first movable head can be increased according to the ratio of the screw pitch.

  In the slide drive device according to the present invention, the drive source that generates the rotational drive force may be outside the device or may be fixed to the base.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Note that the embodiment described below is used as an example for easily explaining the structural features of the present invention and the effects obtained from the characteristic configurations. Except for the technical essential features, there is no limitation on the following contents.

[Embodiment 1]
1. Configuration The configuration of the slide drive device 1 according to the first embodiment will be described with reference to FIG.
As shown in FIG. 1, the slide drive device 1 according to the first embodiment includes a housing 10 that is open on the upper side in the Z-axis direction and a motor 20 that is joined to one end in the X-axis direction. The motor 20 is a stepping motor, and is connected to a motor driver and a motor controller (not shown) by an extended cord.

  A housing 10 in the slide drive device 1 houses one fixed head 30 and three movable heads 31 to 33. The movable heads 31 to 33 are slidable on the guide rail 11 laid on the bottom surface of the casing 10 on the lower side in the Z direction. The movable heads 31 to 33 are provided with holes penetrating in the X-axis direction, and a shaft 21 connected to the rotating shaft of the motor 20 passes through them.

2. Main Configuration Related to Slide Drive The main configuration related to the slide drive in the slide drive device 1 will be described with reference to FIG.
As shown in FIG. 2, the motor 20 in the slide drive device 1 is fixed to the housing 10, and a rotating shaft 20 a extends in the X-axis direction. The rotating shaft 20 a of the motor 20 is connected to the shaft 21 via the coupling 22. The shaft 21 has a square cross-sectional shape and extends in the X-axis direction.

As described above, the slide drive device 1 has one fixed head 30 and three movable heads 31 to 33. The fixed head 30 and the movable heads 31 to 33 are arranged in the order of the fixed head 30, the movable head 31, the movable head 32, and the movable head 33 along the extending direction of the shaft 21 from the motor 20 side.
As with the motor 20, the fixed head 30 is fixed in position with respect to the housing 10 serving as a position reference (base) of the apparatus. The fixed head 30 includes a head block 300, gears 301 and 302 and a bush 304 housed inside thereof, and a bolt 303 whose tip protrudes leftward in the X-axis direction. Here, the gear 301 rotates as the shaft 21 rotates, and is fixed to the shaft 21 in the X-axis direction.

  The movable head 31 and the movable head 32 have head blocks 310 and 320, respectively. The movable head 31 includes gears 311, 312 and bushes 314, 315 housed inside the head block 310, a bolt 313 whose tip protrudes leftward in the X-axis direction, and a bolt 303 in the fixed head 30. And a corresponding nut 316. The movable head 32 also includes gears 321 and 322, bushes 324 and 325, a bolt 323, and a nut 326.

The gears 311, 312 in the movable heads 31, 32 rotate with the rotation of the shaft 21, respectively, and are slidable along the extending direction (X-axis direction) of the shaft 21. Nuts 316 and 326 in the movable heads 31 and 32 are fixed to the head blocks 310 and 320, respectively.
The movable head 33 includes a head block 330 and a nut 336 housed inside the head block 330. The nut 336 is provided at a position corresponding to the bolt 323 of the movable head 32 and is fixed to the head block 330.

  As shown in FIG. 2, when the fixed head 30 and the movable heads 31 to 33 are close to each other in the X-axis direction, the tips of the bolts 303, 313, and 323 are located between the adjacent heads 31, 32, and 33. Each head block 310, 320, 330 is penetrated. For this reason, the head blocks 320 and 330 are provided with recesses 320a and 330a so that the tips of the bolts 303 and 313 do not contact each other.

  As shown in FIG. 2, in the slide drive device 1, the movable heads 31 to 33 are close to the fixed head 30 side by rotating the rotation shaft 20 a of the motor 20 in the direction A. That is, the shaft 21 is rotated with the rotation of the motor 20, and the bolts 303, 313, 323 are screwed into the nuts 316, 326, 336 via gears 301, 302, 311, 312, 321, 322 associated therewith. Go. In the slide drive device 1, the pitch between the fixed head 30 and the movable heads 31 to 33 is defined by the screwed amounts of the bolts 303, 313, and 323 to the nuts 316, 326, and 336.

3. The separated state of the fixed head 30 and the movable heads 31 to 33 In the above, the state in which the fixed head 30 and the movable heads 31 to 33 are close together with the main configuration related to the slide drive of the slide drive device 1 has been described with reference to FIG. Hereinafter, a state in which the fixed head 30 and the movable heads 31 to 33 are separated from each other in the slide drive device 1 will be described with reference to FIG. 3 shows a state in which the rotation shaft 20a of the motor 20 is rotated in the direction B by a predetermined amount from the state shown in FIG.

As shown in FIG. 3, when the rotating shaft 20 a of the motor 20 is rotated in the direction B, the shaft 21 connected thereto is also rotated in the same direction B. Although not shown in FIGS. 1 and 2, the left end of the shaft 21 in the X-axis direction is supported by a flange-shaped bearing 23.
As shown in FIG. 3, in the slide drive device 1, when the shaft 21 is rotated in the direction B, the bolt 303 to which rotation is transmitted via the gears 301 and 302 is applied to the nut 316 of the movable head 31. Rotate in the direction of exiting. Since the position of the fixed head 30 is fixed with respect to the casing 10 as a base, the nut 316 of the movable head 31 is pushed to the left in the X-axis direction by the bolt 303. The pushed movable head 31 moves to the left along the extending direction (X-axis direction) of the shaft 21. Since the gear 311 in the movable head 31 is slidable in the extending direction of the shaft 21, the sliding drive of the movable head 31 is not hindered.

The bolts 313 and 323 of the movable heads 31 and 32 also rotate in the direction in which they are removed from the nuts 326 and 336 as the shaft 21 rotates. For this reason, the movable heads 32 and 33 are also separated from the movable heads 31 and 32, respectively.
Here, in the slide drive device 1 according to the present embodiment, since the screw cutting direction and the screw pitch of the bolts 303, 313, and 323 are the same, each head 30 to 33 when the rotating shaft 20a of the motor 20 is rotated. These pitches are the same.

4). Application Example of Slide Drive Device 1 An application example of the slide drive device 1 according to the present embodiment having the above-described configuration will be described with reference to FIG.
As shown in FIG. 4, the slide drive device 1 according to this embodiment can be applied to a transfer system that transfers workpieces 55 to 58 conveyed by four conveyors 50 to 53 to a container 59. it can. Specifically, suction pads 60 to 63 are attached to the heads 30 to 33 (see FIGS. 1 to 3) in the slide drive device 1. The entire slide drive device 1 is movable in the Y-axis direction and the Z-axis direction.

  First, the slide drive device 1 stands by at the upper part of the manual side end of the conveyors 50 to 53 with the suction pads 60 to 63 spaced apart in the X axis direction. That is, in the slide drive device 1, the heads 30 to 33 shown in FIG. 3 are in a separated state in a state of waiting on the upper part of the Y axis direction labor side ends of the conveyors 50 to 53. Here, since the pitch of the suction pads 60 to 63 is defined by the rotation amount of the motor 20, even when the pitch of the conveyors 50 to 53 is slightly changed due to a layout change or the like, it can be dealt with.

  Next, when the workpieces 55 to 58 are transferred to the ends of the conveyors 50 to 53 in the Y axis direction, the entire slide driving device 1 is lowered downward in the Z axis direction. The downward movement of the slide drive device 1 in the Z-axis direction is executed by, for example, an air cylinder (not shown). When the suction pads 60 to 63 come into contact with the top portions of the workpieces 55 to 58, the workpieces 55 to 58 are sucked by the suction pads 60 to 63.

  Next, the slide drive device 1 moves upward above the container 59 on the near side in the Y-axis direction after ascending upward in the Z-axis direction while maintaining the suction state of the workpieces 55 to 58 by the suction pads 60 to 63. . At this time, the motor 20 in the slide drive device 1 (see FIGS. 1 to 3) rotates, and the pitch of the suction pads 60 to 63 is reduced to a state corresponding to the partition of the container 59.

Thereafter, the slide drive device 1 descends downward in the Z-axis direction, throws the workpieces 55 to 58 into the container 59, ascends upward in the Z-axis direction, and further moves to the back side in the Y-axis direction to move to the standby position. Return to.
As described above, even when the interval between the conveyors 50 to 53 is slightly changed, the slide driving device 1 according to the present embodiment can cope, but the size of the container 59, the partition interval, and the like are changed. Even in the case of the case, it can be dealt with within a certain range.

5. Superiority In the slide drive device 1 according to the present embodiment, the three movable heads 31 to 33 can be slid and driven at a constant pitch by one motor 20. Since the slide amount can be controlled by the rotation amount of the motor 20, the stop position related to the slide drive can be set according to the incidental equipment, and a slight change occurs in the corresponding equipment due to a layout change or the like. In this case, it is not necessary to replace the slide drive device 1 itself.

Further, the pitch of the heads 30 to 33 is defined by the screwing amounts of the bolts 303 to 323 with respect to the nuts 316 to 336 corresponding to the rotation amount of the motor 20, so that there is little error and high accuracy can be ensured. it can.
[Embodiment 2]
1. Configuration A slide drive device 2 according to Embodiment 2 will be described with reference to FIG. In FIG. 5, only the part corresponding to FIG. 2 showing the main part of the slide drive device 1 according to the first embodiment is extracted and drawn, but the other configurations are the same as described above. Also in FIG. 5, the same reference numerals are given to portions having the same configuration as that of the slide drive device 1 according to the first embodiment, and the following description is omitted.

  As shown in FIG. 5, the slide drive device 2 according to the second embodiment is different from the slide drive device 1 according to the first embodiment in terms of the pitch and length of the bolts 343 of the movable head 34 and the corresponding movable devices. The screw pitch of the nut 356 of the head 35 is different. Specifically, the bolt 343 in the movable head 34 has a screw pitch 1.5 times and a length 1.5 times that of the bolts 303 and 353 in the other heads 30 and 35.

The nut 356 in the movable head 35 has a screw pitch 1.5 times that of the other nuts 346 and 366 corresponding to the bolts 343 having a screwing relationship. In the movable head 36, a through hole 360 a is provided in the head block 360 so that the bolt 356 does not come into contact with the movable head 36.
Other configurations in the slide drive device 2, for example, the motor 20, the shaft 21 connected to the motor 20, and the gears 301, 302, 341, 342, 351, 352 provided on the heads 30, 34, 35, 36, and The bushes 304, 344, 345, 354, 355 and the like are the same as those of the slide drive device 1 according to the first embodiment.

2. The separation state of the fixed head 30 and the movable heads 34 to 36 With respect to the slide drive device 2 shown in FIG. 5, the separation state of the fixed head 30 and the movable heads 34 to 36 when the motor 20 is rotationally driven will be described with reference to FIG. To do.
As shown in FIG. 6, in the slide drive device 2, bolts 303, 343, and 353 are driven via gears 301, 302, 341, 342, 351, and 352 by the rotational drive of the motor 20 (see FIG. 5). The nuts 346, 356, and 366 rotate in the direction to be removed from the nuts 346, 356, and 366, respectively. At this time, since the pitch of the bolt 343 is set to 1.5 times that of the other bolts 303 and 353, the displacement is 1.5 times that of the other bolts 303 and 353 even at the same rotation amount. It becomes.

As described above, in the slide drive device 2 according to the second embodiment, the three movable heads 34, 35, and 36 can be slid and driven by the rotation of one motor 20, and the heads 30 and 34 are driven. in the separated state of to 36, the distance _{P 3} between the distance _{P 1} and the movable head 35 and the movable head 36, of the distance _{P 2} of the movable head 34 and the movable head 35, and the fixed head 30 and the movable head 34 On the other hand, it can be 1.5 times.

Note that, as described above, the bolt 343 is 1.5 times as long as the other bolts 303 and 353, so that the bolt 343 is separated from the nut 356 even in the separated state as shown in FIG. There will never be a complete loss.
As described above, the slide driving device 2 according to the present embodiment, by changing than the thread pitch of the bolt 343 in the other, it can be 1.5 times greater than the distance P ₂ on the other. Therefore, in the slide drive device 2 according to the present embodiment, in addition to the superiority of the slide drive device 1 according to the first embodiment, the slide drive device 2 is separated while being driven by one motor 20 (see FIG. 5). distance P ₂ a can be different from the other.

[Embodiment 3]
1. Configuration A slide drive device 3 according to Embodiment 3 will be described with reference to FIG. In FIG. 7, only the part corresponding to FIG. 2 showing the main part of the slide drive device 1 according to the first embodiment is extracted and drawn, but the other configurations are the same as described above. In FIG. 7 as well, portions having the same configuration as that of the slide drive device 1 according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  As shown in FIG. 7, the slide drive device 3 according to the third embodiment is different from the slide drive device 1 according to the first embodiment in the threading direction of the bolt 373 in the fixed head 37 and the bolt 393 in the movable head 39. The main feature is that is leftward (reverse screw). Note that the screw pitches of the three bolts 373, 383, and 393 are the same.

The nuts 386 and 406 in the movable heads 38 and 40 are reversely threaded corresponding to the bolts 373 and 393 having a screwing relationship, and the nut 396 in the movable head 39 is usually corresponding to the bolt 383. The right hand screw is cut.
Other configurations in the slide drive device 3, for example, the motor 20, the shaft 21 connected to the motor 20, gears 371, 372, 381, 382, 391, and 392 provided in the heads 37 to 39, and further a bush 374. About 384, 385, 394, 395 etc., it is the same as that of the slide drive device 1 concerning the said Embodiment 1. FIG.

2. Driving of Slide Drive Device 3 The slide drive of the slide drive device 3 according to Embodiment 3 will be described with reference to FIGS.
First, as shown in FIG. 7, in the slide drive device 3, in one state, the bolts 373 and 393 are respectively pulled out to the middle with respect to the nuts 386 and 406, respectively. 396 is screwed in. When in this state, the fixed head 37 and the movable head 38 has a spacing distance P _4, having a movable head 39 and the movable head 40 both distance P _6. In the slide drive unit 3, because the threaded direction and thread pitch of the bolt 373 and the bolt 393 is set to the same, also the distance P ₆ and the distance P ₄ are set to be the same.

On the other hand, the movable head 38 and the movable head 39 are close to each other because the bolt 383 is screwed into the nut 396.
Next, as shown in FIG. 8, when the rotation shaft of the motor 20 is rotated in the direction C, the bolt 373 and the bolt 393 are screwed into the nut 386 and the nut 406, respectively. On the other hand, the bolt 383 rotates in a direction to come out from the nut 396. Accordingly, the movable head 38 and the movable head 39 are separated from each other.

Here, in the slide drive device 3 according to the present embodiment, since the bolts 373, 383, 393 are both formed with the same screw pitch, the movable head 39 is in a state where the hook is also fixed in the extending direction of the shaft 21. Become. Specifically, the pitch P ₅ of the fixed head 37 and the movable head 39 in the state of FIG. 7, and the pitch P ₇ of the fixed head 37 and the movable head 39 in the state of FIG. 8 equal.

As described above, in the slide drive device 3 according to the present embodiment, for example, workpieces are chucked at two locations, between the fixed head 37 and the movable head 38 and between the movable head 39 and the movable head 40. be able to. Even when the size of the workpiece is changed, it can be dealt with by controlling the number of revolutions of the motor 20 within a certain range.
Note that the slide drive device 3 according to the present embodiment can also drive the plurality of movable heads 38 and 40 by the single motor 20.

[Summary]
The superiority of the configuration described in the first to third embodiments will be described below.
In each of the slide drive devices 1 to 3 according to the first to third embodiments, the fixed heads 30 and 37 as the fixed portions and the movable heads 31, 34 and 38 as the first movable head are the first and the third, respectively. They are connected by bolts 303 and 373 as second connecting members and nuts 316, 346 and 386. Further, the movable heads 31, 34, 38 as the first movable head and the movable heads 32, 35, 39 as the second movable head are respectively bolts 313, 343, as third and fourth connecting members. 383 and nuts 326, 356, and 396.

  In each of the slide driving devices 1 to 3 according to the first to third embodiments, the distance (pitch) between the fixed heads 30 and 37 and the movable heads 31, 34, and 38 and the movable heads 31 and 34 during driving. , 38 and the movable heads 32, 35, 39 are defined by the screwing depths of the bolts 303, 313, 343, 373, 383 with respect to the nuts 316, 326, 346, 356, 386, 396. Is done. Accordingly, in the slide driving devices 1 to 3, the plurality of movable heads 31, 32, 33, 34, 35, 36, 38, 39, and 40 can be slid by the single motor 20, and variously according to the design of the bolt and nut. The drive form can be realized. Specifically, the sliding direction and the sliding amount are defined by the screw cutting direction and screw pitch of the bolt and the corresponding nut.

From the above, a high degree of freedom in design can be realized as in the slide drive devices 1 to 3 according to the first to third embodiments.
[Modification]
The configuration of the slide drive device 4 according to the modification will be described with reference to FIG.
As shown in FIG. 9, one fixed head 41 and three movable heads 42 to 44 are arranged along the extending direction of the shaft 21 in that each slide according to the first to third embodiments. It is the same as that of the drive apparatuses 1-3. The slide drive device 4 according to this modification is different from the slide drive devices 1 to 3 according to the first to third embodiments in the rotation transmission mechanism from the shaft 21 to the bolts 413, 423, and 433. . That is, in the slide drive device according to this modification, the fixed head 41 is provided with two pulleys 411 and 412, similarly, the movable head 42 has pulleys 421 and 422, and the movable head 43 has pulleys 431 and 431. 432 is provided.

The pulleys 411, 421, and 431 are respectively attached to the shaft 21 side. Among these, the position of the pulley 411 is fixed in the extending direction with respect to the shaft 21. On the other hand, the pulleys 412, 422, and 432 are attached to bolts 413, 423, and 433, respectively.
Round belts 417, 427, and 437 are stretched between the pulleys 411, 421, and 431 and the pulleys 412, 422, and 432, respectively.

Other configurations of the slide drive device 4, for example, the motor and the shaft 21 connected to the motor, and nuts 426, 436, 446 provided on the heads 42 to 44, and further bushes 414, 424, 425, 434, 435 These are the same as those of the slide drive device 1 according to the first embodiment.
In the slide drive device 4 according to the present modification, the rotational driving force from the shaft 21 is transmitted via bolts 431, 423 via pulleys 411, 412, 421, 422, 431, 432 and round belts 417, 427, 437 instead of gears. , 433.

The slide drive device 4 having the above configuration also has the same advantage as the slide drive device 1 according to the first embodiment.
Of course, it is also possible to combine the embodiments as in the second and third embodiments as variations with respect to the slide drive device 4 according to this modification.
[Other matters]
In each of the slide drive devices 1 to 4 according to the first to third embodiments and the modified examples, one fixed head 30, 37, 41 and three movable heads 31, 32, 33, 34, 35, 36, 38, 39 are used. , 40, 42, 43, 44 are used as an example, but the number of movable heads can be increased or decreased.

Further, in each of the slide driving devices 1 to 4 according to the first to third embodiments and the modified examples, the motor 20 is employed as a driving source that generates the rotational driving force. However, other than this, a rotary actuator, a gasoline, or a diesel engine is used. It is also possible to adopt.
Further, in each of the slide driving devices 1 to 4 according to the first to third embodiments and the modified examples, the movable heads 31, 32, 33, 34, 35, 36, 38, 39, 40 are mounted on one guide rail 11. , 42, 43, and 44 are slidably driven, but two or more guide rails can be used. Moreover, when using two or more guide rails, they do not need to be on the same plane.

Further, in the slide drive device 2 according to the second embodiment, the screw pitch of the bolts 343 in the movable head 34 is 1.5 times that of the others, but can be made larger than 1.5 times or vice versa. Further, it can be made smaller than 1.5 times. Design can be performed in relation to peripheral equipment.
In the first to third embodiments and the modified examples, the configuration in which the fixed heads 30, 37, and 41 are fixed to the housing 10 is employed. And in a variant, the position of the bolt or nut may be directly fixed to the housing 10). That is, the head blocks 300, 370, and 410 may not be provided. In this case, a bolt or nut can be considered as a reference for the pitch with the movable head.

Moreover, it is also possible to combine suitably the main characteristics of each of the slide drive devices 1 to 4 according to the first to third embodiments and the modified examples. For example, it is possible to adopt a configuration in which the pitch and the threading direction of the bolt are different.
Further, in each of the slide drive devices 1 to 4 according to the first to third embodiments and the modified examples, the configuration in which the motor 20 is fixed to the housing 10 is adopted. However, the drive source (motor or the like) is not necessarily the device. It is not necessary to be provided within. For example, it is also possible to employ a configuration in which the end of the shaft 21 is extended from the housing 10 and the rotational driving force is transmitted from the outside to the shaft 21 only when slide driving is necessary.

  Furthermore, although one application example of the slide drive device according to the present invention is shown in FIG. 4, the application of the slide drive device according to the present invention is not limited to this. For example, a sensor for measuring dimensions (for example, a non-contact displacement sensor) is attached to each of a plurality of heads, and the apparatus is used as a device for measuring dimensions at once for a plurality of workpieces that have flowed through a conveyor line or the like. be able to. And even in the case of such an application example, in the slide drive device according to the present invention, the displacement amount of the head can be changed according to the rotation amount of the motor. Even a slight change can be handled.

  INDUSTRIAL APPLICABILITY The present invention is useful for realizing a slide drive device that can set a slide form of a plurality of heads according to the situation of peripheral equipment.

1 is a perspective view showing a configuration of a slide drive device 1 according to Embodiment 1. FIG. 1 is a cross-sectional view showing a main configuration of a slide drive device 1. 2 is a cross-sectional view showing a main configuration relating to slide drive of the slide drive device 1. FIG. 1 is a perspective view showing a transfer system using a slide drive device 1. FIG. 6 is a cross-sectional view showing a main configuration of a slide drive device 2 according to Embodiment 2. FIG. 3 is a cross-sectional view showing a main configuration of a slide drive device 2. FIG. 6 is a cross-sectional view showing a main configuration of a slide drive device 3 according to Embodiment 3. FIG. 3 is a cross-sectional view showing a main configuration of a slide drive device 3. FIG. It is sectional drawing which shows the main structures of the slide drive device 4 which concerns on a modification.

Explanation of symbols

1, 2, 3, 4. 9. Slide drive device Housing 11. Guide rail 20. Motor 21. Shaft 22. Coupling 23. Bearing 30, 37, 41. Fixed head 31, 32, 33, 34, 35, 36, 38, 39, 40, 42, 43, 44. Movable head 50, 51, 52, 53. Conveyors 55, 56, 57, 58. Workpiece 59. Container 60, 61, 62, 63. Suction pad 300,310,320,330,340,350,360,370,380,390,400,410,420,430,440. Head block 301,302,311,312,321,322,341,342,351,352,371,372,381,382,391,392. Gear 303,313,323,343,353,373,383,393,413,423,433. Bolts 304, 314, 315, 324, 325, 344, 345, 354, 355, 374, 384, 385, 394, 395. 414, 424, 425, 434, 435. Bush 316,326,346,356,366,386,396,406,426,436,446. Nut 411,412,421,422,431,432. Pulleys 417, 427, 437. Round belt

Claims (7)

A base to be a position reference,
A rotating shaft that receives rotational driving force to rotate,
A fixed portion in which the position of the rotating shaft in the extending direction is fixed with respect to the base;
One guide rail provided along the extending direction of the rotating shaft;
A first movable head and a second movable head provided on the guide rail so as to be slidable in a direction along an extending direction of the rotation shaft with respect to the base;
The rotating shaft has at least the same length as the guide rail,
The fixed portion and the first movable head are connected by first and second connecting members,
The position of the first connecting member in the extending direction of the rotating shaft is fixed to the fixed portion, and the first connecting member is rotated by receiving a rotational driving force from the rotating shaft,
The second connecting member is fixed to the first movable head,
One of the first connecting member and the second connecting member has a male screw, the other has a female screw corresponding to the male screw, and are connected to each other by screwing. , The screwing depth between each other changes according to the amount of rotation of the first connecting member,
The first movable head and the second movable head are connected by third and fourth connecting members,
The relative position of the third connecting member in the extending direction of the rotary shaft is fixed with respect to the first movable head, and the third connecting member is rotated by receiving a rotational driving force from the rotary shaft,
The fourth connecting member is fixed to the second movable head,
One of the third connecting member and the fourth connecting member has a male screw, the other has a female screw corresponding to the male screw, and are connected to each other by screwing. And the screwing depth between them changes according to the amount of rotation of the third connecting member,
In the extending direction of the rotation axis,
The pitch between the fixed portion and the first movable head corresponds to the screwing depth between the first connecting member and the second connecting member,
The slide drive device, wherein a pitch between the first movable head and the second movable head corresponds to a screwing depth between the third connecting member and the fourth connecting member. A first gear is attached to the first connecting member,
A second gear that meshes with the first gear is attached to the rotating shaft,
The rotational driving force of the rotating shaft is transmitted to the first connecting member via the first gear and the second gear,
A third gear is attached to the third connecting member,
The rotating shaft is attached with a fourth gear that meshes with the third gear and slides in the extending direction of the rotating shaft in conjunction with the first movable head.
The slide drive device according to claim 1, wherein the rotational driving force of the rotary shaft is transmitted to the third coupling member via the third gear and the fourth gear. The threading direction in the first connecting member and the second connecting member and the threading direction in the third connecting member and the fourth connecting member are the same direction. The slide drive device according to claim 1 or 2. The threading direction in the first connecting member and the second connecting member is opposite to the threading direction in the third connecting member and the fourth connecting member. The slide drive device according to claim 1 or 2. 5. The screw pitch in the first connecting member and the second connecting member and the screw pitch in the third connecting member and the fourth connecting member are the same. 5. A slide drive device according to claim 1. 5. The screw pitch in the first connecting member and the second connecting member is different from the screw pitch in the third connecting member and the fourth connecting member. 5. The slide drive device described. A driving source for generating a rotational driving force is fixed to the base,
The slide drive device according to any one of claims 1 to 6, wherein the drive source transmits a rotational drive force to the rotary shaft .

Images