JPH089421B2 - A device for moving back and forth of the moving body and moving up and down the lift. - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus capable of remotely operating a front-rear moving body having an elevating table for longitudinal movement and elevating the elevating table at a desired position.

[0002]

2. Description of the Related Art Conventionally, the following devices have been known as this type of device. That is, an article transport path that faces the front-back direction,
And a front-rear moving body having an elevating table provided so as to be able to move back and forth along the article transport path, and the bottom of the article is fitted from the four corners to the upper part of both front and rear ends of the article transport path. It is an apparatus in which four positioning guides for holding an article immovably are provided in a protruding manner. In this device, for example, after the article fitted in the rear side positioning guide is floated by the elevation of the lifting platform, the front-rear moving body is advanced to convey the article above the front positioning guide, and the lifting platform is moved. Is lowered to fit the article into the positioning guide. As a mechanism for moving up and down the lift table, a mechanism for moving a vertically long rack up and down by a motor drive, a fluid pressure cylinder facing up and down, and the like are used. As a mechanism for moving the back-and-forth moving body back and forth, a mechanism for moving back and forth by rotating a ball screw provided along the article transport path is used.

[0003]

Disadvantages of the Prior Art The conventional device has the following drawbacks. That is, the front-rear moving body requires a height dimension which is equal to or greater than the sum of the total length of the rack or the fluid pressure cylinder and their vertical movement strokes. Special wiring for supplying power and sending compressed fluid to the fluid pressure cylinder
Since a piping mechanism was required, the size of the entire device was increased. Moreover, since a ball screw having a length substantially equal to the front-rear moving distance is required, the front-rear moving distance cannot be increased so much.

[0004]

[Means for Solving the Disadvantages] The present invention adopts the following means in order to eliminate the above disadvantages. That is, two drive endless belts that are parallel in the left and right facing the front-back direction,
And a front-rear moving body having an elevating table, and one of the drive endless belts is fixed to the front-rear moving body and the other is hung on a wheel rotatably provided on the front-rear moving body, and the wheel and the elevating table are They are connected via an elevating mechanism that changes the wheel rotation into vertical movement.

[0005]

The present invention has the following functions. The elevating table is moved up and down by a vertical motion converted by an elevating mechanism in response to rotation of a wheel provided on a front-rear moving body. These wheels and the lifting mechanism can be downsized in the height direction, unlike a rack or a fluid pressure cylinder that is long in the vertical direction. This wheel is rotated by another drive endless belt that is parallel to the drive endless belt (timing belt, etc.) that moves the front-rear moving body back and forth. No need to install equipment.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. In this specification, the front means the right side of FIG. 2, the rear means the left side of FIG. 2, the left means the upper side of FIG. 2, and the right means the lower side of FIG. First, an outline will be described. As shown in FIG. 1, it has two left and right driving endless belts 1 and 2 which are parallel to each other in the front-rear direction, and a front-rear moving body 3. One drive endless belt 1 is a part between the front and rear wheels 7 (lower side)
Are fixed to the front-rear moving body 3, and the front-rear moving body 3 is included to form an endless structure. The other drive endless belt 2 is itself endless, and a part (upper side) between the front and rear wheels 8 is hung on the wheel 5 rotatably provided on the front and rear moving body 3.

The front-rear moving body 3 has a lifting table 4,
The lifting table 4 is connected to a lifting mechanism 6 (for example, a crank mechanism) that converts the rotation of the wheel 5 into vertical movement.

The drive endless belts 1 and 2 are provided with a drive device 10 provided between the wheels 7 and 8 on one end side thereof.
Are driven simultaneously or separately. When driven at the same time, the driving directions of the two are in a relationship of traveling in opposite directions in comparison between the upper side and the lower side.
That is, when the drive endless belt 1 on the side where the front-rear moving body 3 is fixed is driven in the arrow direction, the front-rear moving body 3 travels in the same direction as the lower side, and as a matter of course, the wheel provided on the front-rear moving body 3 is driven. 5 also runs in the same direction. On the other hand, the other end of the drive endless belt 2 travels at the same speed and in the same direction as the front-rear moving body 3 (wheel 5), so that no rotational force is applied to the wheel 5 (drive endless belt 2). (Because the relative movement of the wheel 5 with respect to 2 does not occur), therefore, the lift base 4 also does not move up and down. However, when only the drive endless belt 1 on the side fixed to the front-rear moving body 3 is stopped in this state, the wheel 5 rotates in the direction of the white arrow as the front-rear moving body 3 (wheel 5) stops traveling. Since the force is applied, the lifting table 4 moves up and down via the lifting mechanism 6.

Next, a specific structure will be described. As shown in FIG. 3, the drive endless belts 1 and 2 and the front-rear moving body 3 are
It is housed in a base frame 11 that is long in the front-rear direction. Further, the lifting tables 4 (there are two front and rear) included in the front-rear moving body 3 also sink in the base frame 11 in the lowered state. As shown in FIG. 2, upper surface openings 12 are formed on the upper surfaces of the front and rear ends of the base frame 11 so that the lifting platform 4 can be lifted and floated above the base frame 11. Further, these upper surface openings 12 are connected to each other by a slit 13 for allowing the front-rear moving body 3 to move back and forth while the elevating table 4 is kept raised. Around the top opening 12, a positioning guide 14 for fitting and holding the bottom of the article W to be conveyed is fixedly provided.

As shown in FIGS. 4 and 5, two guide rails 20 and 21 are provided in the base frame 11 and are parallel to each other in the front-rear direction. (1) A holding tool 1 that fits in the front and rear slidable manner
8 and a roller 19 rolling on the other side (21) are provided. The elevating mechanism 6 described above is provided on the left end side of the front-rear moving body 3. The lifting mechanism 6 includes a bearing 17 that rotatably holds the rotary shaft 15 of the wheel 5, a short lever 25 that projects radially from the output end of the rotary shaft 15, and a short lever 25. Has a long lever 26 swingably connected to the projecting end portion thereof, and a support base 27 of the lifting table 4 is swingably connected to an upper end portion of the long lever 26. As shown in FIG. 6, one lift base 4 is provided at each of the front and rear ends of the support base 27 (two in total). Reference numeral 16 in FIG. 5 is a guide wheel that guides the drive endless belt 2 to be hung on the wheel 5. The support stand 27
Are held by two supporting members 29, and the lower ends of the supporting members 29 are bent toward the right side of the front-back moving body 3 so as to have an L shape as shown in FIG. . The bent ends are connected to each other by the connecting plate 30. On the other hand, the standing substrate 2 is provided at the right end of the front-back moving body 3.
2 is provided, and the standing board 22 is provided with two front and rear guide rails 23 facing up and down on the side facing the connecting plate 30. A holding tool 31 is attached to the connecting plate 30 so as to be vertically slidably fitted on each guide rail 23.

A drive unit 10 (see FIG. 1) for driving the drive endless belts 1 and 2 simultaneously or separately uses a differential gear mechanism (differential) as shown in FIG. . That is, the main shaft 35 that pierces and holds the wheels 7 and 8 of the drive endless belts 1 and 2 in a freely rotatable state.
Is provided with a child rod 36 penetrating with its axis orthogonal to each other. A planet bevel gear 37 is rotatably held at one end of the child rod 36, and a balance weight 39 is attached to the other end thereof. Has been. Wheel 7 of drive endless belt 1
Bevel gears 41, 42 meshing with the planet bevel gear 37 are fixed to the wheel 8 of the drive endless belt 2 via a transmission wheel 40. And
The rotational force of the main motor 50 is input to the transmission wheel 40 via the belt 51, and the rotational force of the sub motor 52 is input to the transmission wheel 45 attached to one end of the main shaft 35 via the belt 53. Has become. The operation of this drive device 10 will be described later.

[0012]

Next, the operation of the embodiment apparatus will be described. Now, as shown in FIG. 3, the case where the articles W are held by the rear side positioning guide 14 of the base frame 11 and the articles W are conveyed to the front side positioning guide 14 will be described. In order to stop the front-rear moving body 3 under the rear side positioning guide 14, the drive endless belt 1 to which the front-rear moving body 3 is fixed is stopped. That is, the main motor 50 (see FIG. 7) is kept in a stopped state with a braking force. If only the sub-motor 52 is operated in this state, the child rod 36 turns as the main shaft 35 rotates, and the planetary bevel gear 37 also turns. Since the bevel gear 41 is also stopped by the stop of the main motor 50, the planetary bevel gear 37 meshing with the main motor 50 is rotated at the same time as turning, and this rotation is transmitted to the other bevel gear 42. Therefore, the bevel gear 42 rotates and only the drive endless belt 2 is driven to travel.

As described above, when the drive endless belt 2 travels independently, the lifting mechanism 6 is actuated by the rotation of the wheel 5 with respect to the front-rear moving body 3 in the stopped state, and the lifting platform 4 is moved up and down. As I did. By stopping the traveling drive of the drive endless belt 2 at the time when the lifting platform 4 has finished moving up (upper limit position stopped state), the article W held by the rear side positioning guide 14 has its bottom surface moved to the positioning guide 14. Ascend to a height that does not interfere.

After stopping the drive endless belt 2 (sub motor 52), only the main motor 50 is operated next. This allows the wheel 7 to pass through the transmission wheel 40.
Rotates to drive the driving endless belt 1. Further, since the bevel gear 41 also rotates together with the transmission wheel 40, this rotation causes the planet bevel gear 37 whose turning motion is stopped and held by the rotation of the sub motor 52 to rotate, so that the planet bevel gear 37 can rotate. The rotation is further transmitted to the other bevel gear 42. Therefore, in this case, the drive endless belt 2 is also driven to travel. At this time, the rotating directions of the bevel gears 41 and 42 are opposite to each other, and the traveling directions of the drive endless belts 1 and 2 are opposite to each other when comparing the upper side and the lower side. As described above, the traveling drive in the opposite direction of the drive endless belts 1 and 2 causes the front-rear moving body 3 to move back and forth without moving the lift base 4 up and down. Therefore, as described above, the article W floated and held above the rear side positioning guide 14 is conveyed above the front side positioning guide 14 while floating. After the conveyance, the lowering operation of the elevating table 4 is performed by the action substantially opposite to that described above, and the article W is held by the front side positioning guide 14.

In the present invention, for example, the rear side positioning guide 14 of the base frame 11 is positioned inside the clean warehouse, the front side positioning guide 14 is positioned outside the clean warehouse, and wafers and the like are stored from the clean warehouse. It can be used when the cassette is automatically taken out. In the present invention, the driving of the drive endless belts 1 and 2 in the opposite directions is not limited, and they may be in the same directions. In this case, a portion (upper or lower side) where the front-rear moving body 3 is fixed to the drive endless belt 1 and the wheel 5 to the drive endless belt 2
The part (top or bottom) to which is attached may be on the same side. Further, the driving device 10 as described above
Alternatively, the drive endless belts 1 and 2 may be individually driven and controlled by different motors. Further, the elevating mechanism 6 includes the short lever 25 and the long lever 2 described above.
In addition to the one in which the eccentric cam 6 is connected, an eccentric cam may be attached to the rotary shaft 15, and the bearing base 27 of the lift 4 may be replaced with a cam follower rolling on the eccentric cam.

[0016]

The present invention has the following effects due to the above-mentioned configuration. When moving up and down the lift table, a wheel that rotates with a drive endless belt and a lift mechanism that changes this wheel rotation into vertical movement are used, and racks and fluid pressure cylinders that are long in the vertical direction are not required. The height can be reduced. Further, since the wheels are rotated by the drive endless belt, it is not necessary to provide a driving device such as a motor or a fluid pressure cylinder in the front and rear moving bodies, and a special wiring / piping mechanism for supplying power or compressed fluid. Is unnecessary, and the overall size can be reduced. Furthermore, by simply changing the length of the drive endless belt, the front-rear moving distance of the front-rear moving body can be freely changed, which makes it easy to deal with various installation sites and also allows the front-rear moving distance to be increased. .

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining the outline of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a side view showing an embodiment of the present invention.

4 is an enlarged cross-sectional view taken along line IV-IV of FIG. 3 (see a portion corresponding to line IV-IV of FIG. 1).

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

7 is a cross-sectional view of a driving device (see a portion corresponding to line VII-VII in FIG. 1).

[Explanation of symbols]

 1, 2 Drive endless band 3 Front-rear moving body 4 Lifting platform 5 Wheels 6 Lifting mechanism

Claims (1)

[Claims] 1. A front-rear moving body having two parallel drive left and right driving endless belts facing the front-rear direction, and a front-rear moving body having a lifting table. Is mounted on a wheel rotatably provided on the front-rear moving body, and the wheel and the lifting platform are connected via an elevating mechanism that changes the wheel rotation into vertical movement. apparatus.