JPS6392514A - Structure for top plate of conveying roller chain - Google Patents

Abstract

PURPOSE:To perform assembly work with no necessity for using a machine screw or the like, by like, by setting a top plate to be a forming article of organic high molecular material of soft quality and providing flat tubular parts, which hold both end parts of a receiving plate, and flat protrusive parts in both ends of a horizontal main plate part. CONSTITUTION:A top plate 8 consists of a forming article of polyurethane resin or the like of soft quality, and a horizontal main plate part (a) forms its both end sides in a flat tubular shape, being able to hold both end parts of a receiving plate 6, while the main plate part (a) is equipped in its reverse side with a protrusive part 10 fitted to a hole 7 formed in the receiving plate 6. A wall part (b), opposed to the protrusive part 10, its provided only in the point end from the protrusive part 10, and when said top plate 8 is mounted to the receiving plate 6, the top plate 8, which fits its one side tubular part 9 to one of the receiving plate 6 and curves the other side tubular part to the upper fits the protrusive part 10 to the hole 7 while fitting the other end of the receiving plate 6 to the tubular part 9a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a top plate of a conveyor roller chain.

[Conventional technology and its problems]

An example of a conventional conveyance roller chain will be explained using the drawings of the present invention. FIG. 1 shows a part of the conveyance roller chain, and this roller chain 1 has rollers as shown in FIGS. 2, 3, and 3. A pair of left and right link plates 3 supporting 2
and a pin link plate 4, and a horizontal receiving plate 6 facing outward is connected to the upper edge of the roller link plate 3 and the pin link plate 4 via an upright leg portion 5.

A top plate (not shown) made of, for example, a metal plate with holes on the upper surface is placed over the left and right receiving plates 6, and screw holes 7 ( The screw through holes in the top plate form countersink holes for fitting the heads of countersunk screws, and the top plate is fixed to the receiving plate 6 with screws.

By the way, the work of attaching the top plate to each roller link plate and pin link plate with screws is extremely complicated, as the operation of screwing nuts onto the screws and tightening the nuts is extremely complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a top plate for a conveyor roller chain that does not require screws to attach the top plate to a receiving plate.

[Means for solving problems]

In order to solve the above problems, the present invention provides that the top plate attached to the receiving plate is made of a soft organic polymer molded product and can tightly hold both ends of the receiving plate on both end sides of the horizontal main plate. a flat cylindrical part, and the three walls of the cylindrical part are located on the back side of the horizontal main plate part as one wall, and the back side of the one wall is tightly fitted into a hole formed in the receiving plate. The top plate of the conveyor roller chain is provided with a flat protrusion, and the wall portion facing the protrusion is located only on the side beyond the protrusion.

[For production] Attach the top plate to the receiving plate in the following order.

First, the cylindrical part on one side of the top plate is fitted into one end of the receiving plate, and the other side is curved upward so that the protrusion passes over the hole in the receiving plate and is deeply fitted, and then the cylindrical part on one side of the top plate is fitted. By fitting the other side cylindrical part to the other end of the receiving plate and fitting the protrusion of the other side cylindrical part into the corresponding hole, the horizontal main plate part of the top plate is restored to a straight line. The protrusions also fit into the corresponding holes, and the top plate is fitted into the receiving plate and cannot be removed.

〔Example〕

In FIG. 2, 8 is a top plate, which is made of a molded product of a soft organic polymer such as thermoplastic polyurethane resin, and both ends of the horizontal main plate part a tightly hold both ends of the receiving plate 6. The three-sided walls bzcXd of this cylindrical part 9 are located on the back side of the horizontal main plate part a as one wall, and the back surface of the one-sided wall a is formed with a receiving plate 6. It is provided with a flat protrusion 10 that tightly fits into the hole (originally a screw hole) 7.

Further, the wall portion facing the protrusion 10 is formed only on the side beyond the protrusion 10. Although not shown, the upper surface of the top plate may be knurled.

To attach the top plate 8 to the receiving plate 6, first fit the cylindrical part 9 on one side of the top plate 8 to one end of the receiving plate 6, and curve the other side upward so that the protrusion 10 is circular. The protrusion 10 is passed over the circular hole 7 and deeply fitted while being careful not to fit into the hole 7, and then the cylindrical part 9a on the other side of the top plate 8 is fitted to the other end of the receiving plate 6. At the same time, by fitting the protrusion 10a into the corresponding circular hole 7a and restoring the horizontal main plate part a to a straight line, the protrusion 10 on one side also fits into the corresponding circular hole 7, and in this state, the top plate 8 is stuck in the receiving plate 6 and cannot be removed.

However, when replacing the top plate 8, by pushing up the center part of the top plate 8 from below the chain with a screwdriver, etc., the protrusion 10.10a will be partially detached from the hole 7.7a, allowing it to be moved to either the left or right. Therefore, by removing the moved cylindrical part (for example, the cylindrical part 9) from one end of the receiving plate 6, and then bending the removed part upward, the other cylindrical part can also be removed.

〔effect〕

The structure of the top plate of the conveyance roller chain of the present invention provides the following effects.

The top plate attached to the receiving plate connected to the upper edge of the roller link plate or pin link plate is a soft organic polymer molded product that can tightly hold both ends of the receiving plate on both ends of the horizontal main plate. It has a flat cylindrical shape, the three walls of the cylindrical part are located on the back side of the one wall made of the horizontal main plate part, and the back side of the one wall has a flat protrusion that tightly fits into the hole of the receiving plate,
The wall portion of the cylindrical portion facing this protrusion is only on the outside of the protrusion, so when installing this top plate on a receiving plate, first attach the cylindrical portion on one side of the top plate. Fit into one end of the top plate and curve the other side upward to allow the protrusion to pass over the hole in the backing plate and fit deeply, then fit the cylindrical part on the other side of the top plate to the other end of the backing plate. At the same time, by fitting the protrusions of the other side cylindrical part into the corresponding holes and restoring the top plate to a straight line, the protrusions on one side also fit into the corresponding holes, and the top plate becomes the receiving plate. This eliminates the trouble of attaching nuts to the screws and tightening them, which is the case when fixing the top plate of a conventional conveyor roller chain to the receiving plate with screws.

[Brief explanation of the drawing]

Fig. 1 is a front view of a portion of an example of a conveying roller chain equipped with the top plate of the present invention, Fig. 2 is an enlarged exploded perspective view of the main parts of the same, and Fig. 3 is an enlarged view taken along the line ■-■ in Fig. 1. FIG.

Claims (1)

[Claims] In a roller chain for conveyance, a horizontal receiving plate facing outward is connected to the upper edge of the roller link plate and the pin link plate via an upright leg, and a top plate is attached to the upper surface of the receiving plate. The plate is a molded product made of a soft organic polymer and is provided with flat cylindrical parts on both end sides of a horizontal main plate part that can tightly hold both ends of the receiving plate, and the three walls of the cylindrical part are arranged in the horizontal direction. It is located on the back side of the main plate having one wall, and the back side of the one wall has a flat protrusion that tightly fits into the hole formed in the receiving plate, and the wall opposite to this protrusion has a protrusion. A structure of a top plate of a conveyor roller chain characterized by having only the front side of the top plate.