JPH08175641A - Conveyance device - Google Patents

Abstract

PURPOSE: To provide a conveyance device which can carry out highly efficient conveyance with two conveyance bases. CONSTITUTION: Two rails 11, 12 are laid in parallel to a conveyance line, on each of which conveyance bases 21, 22 are installed so as to run independently. The height positions of the respective conveyance bases can be switched. At the time of forward movement, they run at a high position, and at the time of backward movement, they run at such a low position as does not make any interference with the above movement. Height switching is carried out by driving an actuator to chance the height of the rails 11, 12. It is thus possible to improve conveyance efficiency with minimum equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating transfer apparatus for transferring, for example, a substrate on which a semiconductor chip or the like is mounted, a frame-shaped product or other articles, and more specifically, a single transfer line at the same height. The present invention relates to a transfer device that reciprocates one transfer table.

[0002]

2. Description of the Related Art As a conventional conveying device of this type, FIG.
The ones shown in were known. In this device, a chain or a belt is extended in a loop shape along a transfer line 51 in a horizontal plane, and a carrier table 52, on which a conveyed object is mounted and conveyed, circulates and travels by the chain or belt. are doing.

[0003]

However, in such a transporting device, since two or more transporting pedestals 52, ... Travel by one belt or chain, these transporting pedestals 52 ,. Cannot operate independently. In addition, there is a problem that a large number of conveyors are required to efficiently convey the articles.

Therefore, the present invention is to provide a transfer device capable of high-speed transfer with a small number of transfer bases.
Its purpose is. Further, it is an object of the present invention to provide a carrier device capable of carrying articles to the same height position on one carrier line. Further, it is an object of the present invention to provide a carrier device capable of increasing the speed of the carrier table and enhancing the carrying capacity.

[0005]

According to a first aspect of the present invention, there is provided a pair of rails extending along a transfer line and arranged in parallel, and a pair of rails provided so as to run on these rails respectively. Conveyance provided with a pair of conveyors that travel back and forth along a conveyor line in a vertical plane that includes the height position switching means that can change the height position of these conveyors with respect to the horizontal plane including the conveyor line. It is a device. Here, the transport line is at least two points separated by a predetermined distance in the horizontal plane.
It is composed by connecting two points. Further, the vertical plane including the transport line is a surface that includes the transport line and is vertical to the horizontal plane when the transport line is configured on the horizontal plane.

The invention according to claim 2 is the transport apparatus according to claim 1, wherein the height position switching means vertically moves each transport table with respect to each rail.

The invention according to claim 3 is the transfer device according to claim 1, wherein the height position switching means moves the pair of rails up and down within a vertical plane. This vertical plane is a vertical plane that includes the transportation line.

[0008]

According to the invention described in claims 1 to 3, the pair of conveyors independently travel to convey the conveyed object to the same height position. Therefore, for example, it is possible to cope with a conveyance line that requires work such as processing at a fixed position, and it is possible to convey a conveyed object at high speed.
Specifically, while the upper carriage is moving, the other carriage can return to the lower carriage at another speed. Therefore, the number of times of transportation can be increased, and the transportation capacity is enhanced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of a carrying device according to the present invention.

As shown in these figures, in this carrying device, two carrying positions (A), which are separated in the horizontal plane,
It is configured to convey the conveyed object along a conveying line which is a straight line between (B). A pair of rails 11,
12 are juxtaposed so as to extend along this conveyance line. The pair of rails 11 and 12 are arranged in parallel in a horizontal plane with a predetermined gap therebetween, and the rails 11 and 12 are provided so as to be vertically movable in a vertical plane (vertical plane). .

The pair of transport bases 21 and 22 are provided so that they can travel back and forth on these rails 11 and 12, respectively. Reference numerals 31 and 32 denote drive motors for moving the transport bases 21 and 22, respectively.
The configuration is such that each 42 is driven and rotated. Rotating shaft 4
1, 42 are gearboxes 51, 5 of the respective carriages 21, 22.
They are respectively screwed into the carriage 2, and rotate in both forward and reverse directions to reciprocate the carriages 21 and 22 along the rails 11 and 12. The rotary shafts 41, 42 and the motors 31, 32 are fixed at the same height position.

The height position switching means capable of changing the height position of the carriages 21 and 22 above the horizontal plane is configured to vertically move the rails 11 and 12 with respect to the horizontal plane. For example, the tips of the piston rods of the actuators 61 and 62 are connected to the lower surfaces of the rails 11 and 12, respectively. The rails 11 and 12 are moved up and down by driving the actuators 61 and 62 to move the piston rods in and out. Carrier 21,
The respective mounting table portions (upper end portions) 21A and 22A of 22 are the supporting portions 71 and 72 of the gear boxes 51 and 52, respectively.
On the other hand, it is supported by two vertical bars so as to be vertically movable.

Therefore, in this transfer apparatus, as shown in FIG. 4, the frame (transferred object) W is placed on the mounting table portions 21A and 22A of the transfer tables 21 and 22 at the position (A). Then, the motors 31 and 32 are driven in order, and the carriages 21 and 22 are sequentially moved toward the position (B) after a certain period of time. At this time, the carriages 21 and 22 maintain a constant height position. It is assumed that the traveling of each of the carriages 21 and 22 is performed independently. Transport platform 2 stopped at position (B)
The frame W is taken out of the frames 1 and 22. Then, the carriages 21 and 22 travel toward the position (A) while changing their height positions so as not to interfere with each other. That is, the carriages 21 and 22 travel on the upper side when moving forward and on the lower side when returning. Then, in this case, the frame W may be processed at the position (C) which is an intermediate portion between the positions (A) and (B) during the transportation.

As described above, since the two conveyors 21 and 22 are set on the same conveyor line, the conveyors 21 and 22 can be independently moved at appropriate speeds according to the kind of conveyed objects. At this time, when one of the carriages 21 and 22 is moved up and down, it can pass under the other when returning. Therefore, it is possible to perform efficient transportation by making the traveling speed of the transported material different from that at the time of transportation.

The number of carriages and rails is not limited to two. For example, one rail may be configured to run two or more carriages. In this case, for example, each carrier may be configured to travel on the upper part and the lower part of one rail. By using one rail in this way, the equipment can be further simplified. Further, it may be configured such that only the carrier is moved up and down without moving the rail up and down. In this case, the driving device for traveling is provided independently for each carrier. Further, when traveling the above-mentioned respective carriages, it is needless to say that the traveling position may be detected to automatically control the height, speed and the like during the traveling.

[0016]

According to the present invention, for example, when an object is conveyed between two positions, the conveying line can be shortened. In addition, the number of carriages can be reduced. In addition, high-speed transportation can be realized. In addition, the two conveyors can be driven at independent speeds,
It is possible to flexibly cope with high-speed transportation and addition of specific work. For example, the number of times of transportation can be increased, and the transportation capacity is enhanced.

[Brief description of drawings]

FIG. 1 is a front view showing a carrying device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a carrying device according to an embodiment of the present invention.

FIG. 3 is a side view showing a carrying device according to an embodiment of the present invention.

FIG. 4 is a front view showing a carrying device according to an embodiment of the present invention.

FIG. 5 is a schematic view showing a conventional transfer device.

[Explanation of symbols]

 11,12 Rails 21,22 Transport platform 61,62 Actuator

Claims (3)

[Claims] 1. A pair of rails that extend along a transfer line and are arranged in parallel, and each of which is provided so as to be able to travel on these rails, and reciprocates along a transfer line in a vertical plane including the transfer line. A transfer device comprising a pair of transfer bases and a height position switching means capable of changing the height positions of these transfer bases with respect to a horizontal plane including a transfer line. 2. The transfer device according to claim 1, wherein the height position switching means moves each transfer table up and down with respect to each rail. 3. The transfer device according to claim 1, wherein the height position switching means moves the pair of rails up and down within a vertical plane.