JPH0544324Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a table conveyor driven by a chain.

[Conventional technology]

Electrical products, small mechanical devices, etc. are assembled on conveyors and sent to the next process by assembly lines.

The conveyor used in this assembly line operation was a belt conveyor or a roller conveyor with a table placed on top.

[Problem that the invention attempts to solve]

However, in the case of a belt conveyor, since each item to be assembled is placed on the same belt, it is not possible to stop the item in an accurate position, which makes it difficult to automate the work.

Further, in the case of a roller conveyor or the like, a conveyor is also required to return the transported table to its original position, and as a result, there is a problem in that a large installation area is required.

Therefore, the present inventor devised a table conveyor in which pairs of chains are arranged in parallel and the chains are connected by a connecting rod.However, in a table conveyor using such chains, the returning chain always goes in the opposite direction. placed at the bottom of the chain,
For this reason, there was a problem in that during assembly, small parts such as screws could accidentally fall onto the table, which is the back side of the table, and get caught in adjacent connecting rods that make up the table.

The present invention was developed in view of these circumstances, and the table surface is flat and strong, so that even if small parts such as screws are dropped, they will not be damaged.
To provide a table conveyor which can smoothly start and stop a table stand constituted by a plurality of connecting rods without getting caught in each connecting rod.

[Means for solving problems]

The table conveyor according to the present invention that meets the above object includes a pair of endless chains arranged in parallel inside a drive chain consisting of a pair of endless chains arranged in parallel and meshing with a sprocket rotationally driven by a motor. A driven chain consisting of an end chain is provided, one side of a U-shaped spring is attached to the side of the driven chain on the drive chain side, and a friction plate is provided on the other side of the U-shaped spring. The friction plate is brought into pressure contact with the side of the drive chain to transmit power from the drive chain to the driven chain, and the pair of driven chains are connected to each other using a pair of connecting pins so that the outside thereof is flat. The tables are connected by a plurality of connecting rods that form a table base, and tapered portions that contract inward from the center of the connecting pin attachment position are formed on the front and rear side surfaces of the connecting rods in the front and back direction of conveyance. Moreover, a V-shaped gap formed by the tapered portions of the adjacent connecting rods and expanding toward the inner side of the connecting rods is a turning portion of the driven chain and constitutes a table base surface of the connecting rods. A substantially V-shaped gap is formed that widens toward the outer side, and small parts can be discharged at the turning section.

[Effect]

The table conveyor according to the present invention connects the driven chains arranged in two rows in parallel by a plurality of connecting rods of the same shape, and the outside of the connecting rods is flat. If the driven chain is straight, the connecting rods form a flat table.

Since each connecting rod is connected to the driven chain from both sides by a pair of connecting pins, the flat surface is always stable even if an eccentric load is applied to the connecting rod.

In addition, the side part of the connecting rod is tapered from the inside from the center of the connecting pin attachment position, and a stepped part is formed symmetrically on the inside, so that it can be smoothly turned when the driven chain turns at the turning part. The table can be turned, and if a small item such as a screw falls onto the table, it will fall into the groove formed from the tapered side, but this tapered groove has a certain gap. Since it turns and opens while forming, the fallen small object falls to the bottom when turning and does not get caught in the gap between the connecting rods.

The driven chain, which is a component of the table base, is frictionally driven while contacting the drive chain via a U-shaped spring with a friction plate attached to one end, so that an unreasonable load is not applied to the table base. If a large number of table stands are placed on the same conveyor, it is possible to stop each table stand alone.

〔Example〕

Next, an embodiment embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.

Here, FIG. 1 is a side view of a connecting rod constituting a table conveyor according to an embodiment of the present invention, FIG. 2 is a partial plan view of the table conveyor, and FIG. 3 is a view taken in the direction of arrow A-- in FIG. A side view and FIG. 4 are schematic side views of the table conveyor.

As shown in FIGS. 1 and 2, a table stand 1 used in a table conveyor according to an embodiment of the present invention
0 is a plurality of aluminum connecting rods 11
The outer portions of the connecting rods 11 are flat so that when the connecting rods 11 are lined up, they form a flat surface.

The connection rod 11 is attached to the connection rod 1.
Match the pitch of the driven chain 12 on the side of 1,
Holes 13 and 14 having the same size as the connecting pin of the driven chain 12 are formed, and the hole 1
Slightly longer connecting pins 15 and 16 are fitted into the holes 3 and 14 from both sides.

The front and rear sides of the connecting rod 11 are approximately parallel to each other on the outside of the attachment positions of the connecting pins 15 and 16, but are tapered inwardly on the inside of the connecting pins 15 and 16. As shown in Figure 1, even when bent, each connecting rod 11
The wheels do not collide with each other and can turn with sufficient clearance at the turning point.

A trapezoidal flesh part 17 is formed in a stepped and symmetrical manner on the inside of the table base 10 to increase the overall strength and to prevent small objects such as screws from being temporarily attached while the table base 10 is being returned. Even if a component falls, it will fit into the groove formed by the adjacent tapered portions 18 and be latched.

The driven chain 12 is an end chain (only one side of the pair of driven chains is shown in FIGS. 2 and 3), and a drive chain 19 that is an endless chain is disposed on the side thereof. There is. This endless chain 19 is arranged on both sides of the upper part of the main body of the table conveyor 20 as shown in FIG. There is.

Note that the straight portion of the drive chain 19 is the third
As shown in the figure, plate-shaped guide members 22 and 23 made of synthetic resin or the like are provided at the upper and lower intermediate portions, so that the drive chain 19 can move smoothly in a straight line, and the connecting rod 11 can be attached. Plate-shaped guide members 24 and 25 are attached to the upper and lower sides of the driven chain 12, which is
2 and 19 are designed to allow smooth straight and semicircular turns.

One side of a U-shaped spring 26 is attached to the outside of the driven chain 12, and a friction plate 2 made of synthetic resin is attached to the other side of the spring 26.
7 is mounted so as to transmit the force of the drive chain 19 to the driven chain 12 by means of frictional force.

In addition, as shown in FIG. 4, the drive chain 19
A chain tensioning device 27 is provided in the table conveyor to maintain tension in the chain while always maintaining the length of the entire table conveyor.

Next, the table conveyor 2 according to the embodiment
0 will be explained in more detail. When the drive chain 19 is moved, the driven chain 12, which is pressed by the spring 26, follows along the upper and lower guide members 24, 25, whereby the table base 10 is moved. , resulting in an endless movement along the drive chain 19.

If a small part such as a screw falls from the upper part when the table base 10 moves at the lower part, it will fall into the groove formed by the tapered part 18, but will continue to move horizontally and form a semicircular shape. When the turning position is reached, the groove opens outward and the small part falls to the bottom, and the small part smoothly slides onto the table base 10 without getting caught on the adjacent part of the connecting rod 11.
can be activated.

[Effect of idea]

As is clear from the above description, in the table conveyor according to the present invention, both ends of the plurality of connecting rods are connected to the driven chain by paired connecting pins, and the outer sides thereof are flat. ,
When the driven chain is in a straight line, a substantially completely flat table base can be constructed.

Since the adjacent side portions of the connecting rod have tapered portions that contract inward from the connecting pin mounting position, it is possible to turn smoothly. Furthermore, since the driven chain is provided with a tapered portion that opens outward when the driven chain turns, small parts that have fallen from the upper part fall smoothly and are removed from the table conveyor.

In addition, in the driven chain, power is transmitted by a U-shaped spring with a friction plate on one side of the drive chain, so if there is an overload or it is necessary to stop one table base. In this case, the table base can be stopped while the drive chain remains in motion.

[Brief explanation of the drawing]

Fig. 1 is a side view of a connecting rod constituting a table conveyor according to an embodiment of the present invention, Fig. 2 is a partial plan view of the table conveyor, and Fig. 3 is a side view taken along arrow A-A in Fig. 2. , FIG. 4 is a schematic side view of the table conveyor. Explanation of symbols, 10... Table stand of table conveyor, 11... Connecting rod, 12... Driven chain, 13, 14... Hole, 15, 16... Connecting pin, 17... Flesh part, 18... Taper Part, 19...
...Drive chain, 20...Table conveyor, 2
1... Variable speed motor, 22-25... Guide member, 26... Spring, 27... Friction plate, 27
a...Chain tension device.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of endless chains arranged in parallel inside a drive chain consisting of a pair of endless chains arranged in parallel that mesh with a sprocket that is rotationally driven by a motor. A driven chain consisting of an end chain is provided, one side of a U-shaped spring is attached to the side of the driven chain on the drive chain side, and a friction plate is provided on the other side of the U-shaped spring. The friction plate is brought into pressure contact with the side of the drive chain to transmit power from the drive chain to the driven chain, and the pair of driven chains are connected to each other using a pair of connecting pins so that the outside thereof is flat. The tables are connected by a plurality of connecting rods that form a table base, and tapered portions that contract inward from the center of the connecting pin attachment position are formed on the front and rear side surfaces of the connecting rods in the front and back direction of conveyance. Moreover, a V-shaped gap formed by the tapered portions of the adjacent connecting rods and expanding toward the inner side of the connecting rods is a turning portion of the driven chain and constitutes a table base surface of the connecting rods. A table conveyor characterized in that a substantially V-shaped gap is formed that widens toward the outer side, and small parts can be discharged at the turning section. (2) The table conveyor according to claim 1, wherein the connecting rod is made of aluminum.