JPS622172Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a conveyor device for conveying workpieces. 2. Description of the Related Art When assembling a workpiece, such as a car, a line is formed to transport the body of the car between each assembly process, and a conveyor is used in this line. This conveyor includes a shuttle plate type conveyor that is placed on rollers laid on the floor and moves on the floor by the rotation of the rollers, and a conveyor that is wound between a pair of drive bodies. Slat conveyors and the like are known in which a workpiece can be placed on a flat portion formed between the driving bodies and transported.

However, each of these conveyors had the following drawbacks.

In other words, the shuttle plate conveyor has
Since the shuttle moves back and forth within the floor groove, it is necessary to provide the necessary space for its movement, and when the shuttle plate moves within that space, a gap is created between the rear end of the shuttle plate in the direction of movement and the floor groove. There is a danger that a worker may fall into this gap, and since the conveyor is wrapped between a pair of drive bodies, there is a danger that the worker may fall into this gap. Since areas other than the conveyor surface do not contribute to conveyance, there is a drawback that conveyance efficiency is poor compared to the length of the conveyor.

Furthermore, the slat conveyor has the disadvantage that it is difficult to position the workpieces loaded on the conveyor because the conveyor is elongated due to the stretching action between the drive bodies.

The present invention has been made in view of the above, and its purpose is to provide a conveyor system that eliminates the above-mentioned drawbacks and has only the advantages obtained by each type of conveyor.

The feature of the present invention is that a slat conveyor having slats formed integrally with the shuttle plate conveyor is placed in the conventional gap at both ends of the shuttle plate conveyor in the moving direction. .

The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 is a schematic side cross-sectional view of an embodiment of the present invention, in which a groove formed in a floor surface F is shown.
Slut conveyors 2 are arranged on both sides of the shuttle plate conveyor 1 in the FA and FB.

As shown in FIG. 2, the shuttle plate conveyor 1 includes a roller 1a that is rotatably supported by a frame S embedded in a groove FA, and a roller 1a that is rotatably supported by a frame S embedded in a groove FA.
a, and a shuttle plate 1b slidably disposed via means not shown.

On the other hand, as shown in FIG. 3, the slat conveyor 2 is attached to a frame 2a provided in the groove FB so as to face each other in the workpiece conveyance direction (arrow shown in FIG. 1) in this frame 2a. A pair of support shafts 2b are arranged with an interval at least equal to or longer than the length of the workpiece, a chain sprocket 2c serving as a drive body is rotatably attached to each of the support shafts 2b, and these chain sprockets. The spindle 2 of the chain 2d wound between the legs 2c
The same chain 2d in the extension part with a length between b
A slat 2e is fixed to the upper part of the piece, and a rail 2f is located on the lower surface of the chain 2d and extends so as to come into contact with the lower surface of the chain 2d.
(See Figure 1).

Moving direction of shuttle plate conveyor 1 (first
As shown in FIG. 4, the front and rear ends of the slat conveyor 2 (in the direction of the arrow in the figure) are fixed to the upper part of the chain 2d and formed integrally with the slat conveyor 2. has been done.

A motor M serving as a driving body for rotationally driving one of the chain sprockets 2c is provided on one side of the groove FB in which the slat conveyor 2 is disposed. The slat conveyor 2 is reciprocated by an amount of movement corresponding to the distance between the axes of the slat conveyor 2, thereby causing the slat conveyor 2 to reciprocate.

When the slat conveyor 2 reciprocates, the shuttle plate conveyor 1 follows the reciprocating movement.

In addition, in FIG. 1, lifters to be described later are arranged at both ends of the workpiece in the transport direction (arrows in FIG. 1) for carrying the workpiece W into or out of the slat conveyor 2. , on the movement path of the shuttle plate conveyor 1 and on the side of the slat conveyor 2, when these conveyors move back, means are arranged to stop the workpiece W at the forward movement (transfer direction) position and prevent the work W from moving back. ing.

That is, the lifter is located in the groove FC formed near the groove FB in which the slat conveyor 2 is arranged, as shown in FIG.
Specifically, it faces the lower surface of a truck 3 (see FIG. 1), which will be described later.

The groove FC extends in a direction perpendicular to the conveying direction of the workpiece W, and the lifter 4 can move within the groove FC in the perpendicular direction.

The lifter 4 is of a self-propelled type and has a fork extending perpendicular to the plane of FIG.
When carrying out the workpiece W, the fork is inserted into the lower surface of the cart 3, and the workpiece W is lifted and moved in a direction perpendicular to the transport direction.

Further, when carrying in the workpiece W, the lifter 4 performs an operation opposite to that when carrying out the workpiece W, and brings the workpiece W onto the slat conveyor 2.

Further, the lifter 4 ascends and descends when carrying in and out the workpiece W, and also rises when the conveyor moves backward to hold the workpiece W in the position during forward movement.

Further, the means for preventing the backward movement of the workpiece W is constituted by a lifter 5, and the lifter 5 is placed on the side of the groove FA along the conveyance direction of the workpiece W in the installation area of the shuttle plate conveyor 1, as shown in FIG. It is fixed in a groove FD formed on the side, and the upper stage faces the lower surface of the workpiece W, more specifically, the lower surface of the trolley 3, which will be described later.

The lifter 5 is provided in the groove FD at a position corresponding to the forward stroke of the workpiece W, and is raised during the backward movement of the shuttle plate conveyor 1, as shown by the two-dot chain line in FIG. The workpiece W is held in a reciprocating position.

The shuttle plate conveyor 1 and the slat conveyor 2 are arranged so that the surfaces exposed from the floor are at the same level, so that there are no steps between each conveyor, and
Since the conveyors are fixed together at their ends, there are no gaps between the conveyors.

As shown in FIGS. 1 and 5, on the top surface of the conveyor line constituted by each of these conveyors, only one of the wheels 3a and 3b of the trolley 3, which is the member that carries the work, is is a wheel stopper 1 provided on the top surface of the shuttle plate conveyor 1.
c, and this trolley 3 is moved by the operation of each conveyor.

In the conveyor line configured as described above, the conditions during workpiece conveyance are as follows.

The base end of the conveyor device in the conveyance direction, in other words,
When a means (not shown) detects that a workpiece W has been loaded on the slat conveyor 2 located at the workpiece loading section, the motor M moves the workpiece W onto the slat conveyor 2 located at the end of the conveyance direction, in other words, the slat conveyor 2 located at the workpiece unloading section. The rat conveyor 2 is driven, and the rat conveyor 2 and the shuttle plate conveyor 1 driven therewith are respectively moved in the transport direction shown by the arrow in FIG. 1, thereby displacing the workpiece W by the forward movement distance.

Next, when the motor M moves back, the slat conveyor 2 and the shuttle plate conveyor 1 return to their original positions. At this time, work W
are lifters 4 and 5 placed on the side of the conveyor.
As the following movement with the conveyor is cut off due to the rise of the conveyor, the backward movement is inhibited. Therefore, the conveyor does not follow the backward movement of each conveyor, but stays at the position displaced by the forward movement of the conveyor.

Hereinafter, each conveyor reciprocates according to the reciprocating rotation of the motor M, but the work W on the same conveyor is
Since the conveyor is displaced only when it moves forward, as a result,
Move in the transport direction. When the workpiece W reaches the end portion in the transport direction, a detection means (not shown) provided at the same portion detects that the workpiece W has reached the end portion, and the workpiece is transferred to the lifter 4 driven by the detection means. (see FIG. 6), the slat conveyor 2 is carried out.

As described above, according to the present invention, within the space for installing the shuttle plate conveyor, the end portion when the shuttle plate conveyor moves, specifically, the groove and the end portion in the moving direction of the conveyor. By arranging a slat conveyor, you can eliminate the gap that occurs between the shuttle plate conveyor and the shuttle plate conveyor. Since the shuttle plate conveyor only needs to slide, there is no need to provide a special drive source for the shuttle plate conveyor, and the structure of the conveyor line can be simplified. , only serves as the driving part and loading/unloading part of the shuttle plate conveyor, so there is no need for a long extension part for transporting the workpieces, and as a result, the length of the transport path relative to the length of the chain can be minimized. More specifically, since the length of the extended portion can be set only to the length of the workpiece, the extension of the extended portion can be minimized, and the workpiece can be accurately positioned.

In the embodiment of the present invention, only one of the slat conveyors provided at both ends of the shuttle plate conveyor is driven by a motor, but both of the slat conveyors, that is, the conveyor line is driven by a motor. It is also possible to drive each of the slat conveyors in the work loading and unloading sections forward and backward, respectively.

[Brief explanation of the drawing]

FIG. 1 is a schematic side cross-sectional view showing an embodiment of the present invention, and FIGS. 2, 3, and 5 are indicated by the arrows -,
4 is a partial enlarged view of FIG. 1, and FIG. 6 is a cross-sectional view of FIG. 1 as viewed from the direction indicated by the arrow. 1...Shuttle plate conveyor, 1b...Shuttle plate, 2...Slat conveyor, 2d
...Chain, 2e...Slut, M...Motor.

Claims (1)

[Claims for Utility Model Registration] 1. In a conveyor line obtained by a shuttle plate conveyor, slat conveyors are arranged at both ends of the shuttle plate conveyor in the direction of movement, and the slat conveyor is connected to both ends of the shuttle plate conveyor in the direction of movement. A conveyor device characterized by being integrally formed with a conveyor. 2. The conveyor device according to claim 1 of the above-mentioned utility model registration, characterized in that at least one of the slat conveyors is driven.