JPS6129715Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a feed roller, and more specifically, to a feed roller in which uneven wear is eliminated by dividing the roller into a plurality of parts and replacing the positions of the divided rollers. It is.

For example, when sewing leather, the leather is cut to reduce the thickness of specific areas in order to improve workability and avoid increasing the thickness of the overlapping areas.

As shown in Fig. 1, the feed roller used in this leather plowing work has a boss 2 made of metal such as aluminum or iron for inserting the drive shaft 1, and a rubber mixed with diamond sand at the center of the boss 2. A drum-shaped crown-shaped roller main body 3, which has a maximum diameter and gradually decreases in diameter toward the end, is fixed by firing. However, in this case, there is a drawback that even if the roller main body 3 partially wears out, the entire roller must be replaced, and since the roller is relatively worn out, the cost of replacing it is high, and the roller main body 3 is prone to contact with the leather. As a result, static electricity is generated and the leather scraps scraped during the leather plowing process are rolled up and adhered to each other, causing large variations in the thickness of the plow in the leather being processed depending on the amount and thickness of the attached leather scraps, and in extreme cases. The drawback was that the leather was partially torn off during processing.

This invention aims to eliminate the above-mentioned drawbacks, and its features are that the boss for inserting the drive shaft is removable, and the main body of the roller attached to this boss is arranged in multiples of 2. To provide a feed roller which is divided into two unit roller structures each having a similar shape, and whose mounting position can be changed between the two similar roller structures when attached to the boss. It is. An embodiment of this invention shown in the drawings will be described in detail below.

Fig. 2 is an exploded perspective view of the feed roller of this invention, and numeral 11 has a flange 12 at one end and a split groove 13 in which the pin of the drive shaft mentioned above engages, and a retaining ring 16 and a threaded part 14 for attachment at the other end. , and a boss for attaching a drive shaft with a key 15 integrally attached to the center thereof, and is made of metal such as aluminum or iron. Reference numeral 17 designates a roller main body that has a boss insertion hole 18 and a keyway 19 in the center, and is composed of two unit roller structures 20a to 20d each having a similar shape.This roller main body 17 is made of metal or hard material. It is made of rubber or synthetic resin and has small pitch knurling 21 on its surface, but it may be a smooth surface depending on the purpose of use.

FIG. 3 shows the state before assembly as a feed roller, in which four unit roller structures 20a to 20d are shown.
First, the unit roller structures 20b and 20c are brought into contact with the sides with the larger end diameters, and then the unit roller structures 20a and 20d are placed on both sides of the unit roller structures 20b and 20c with the sides with the larger end diameters facing each other. are brought into contact with the end faces of the unit roller structures 20b and 20c, and the key grooves 19 are aligned to form the roller main body 17.

Next, as shown in FIGS. 4 and 5, the boss 11 is inserted from one end of the roller main body 17 into the boss insertion hole 17 at a position where its key 15 matches the key groove 19, and the roller main body 17 A retaining ring 16 is screwed onto the threaded portion 14 of the boss 11 exposed at the other end, and the roller main body 17 is clamped between the collar 12 and the retaining ring 16, thereby completing the feed roller.

The feed roller of this invention has the above structure, and the procedure for changing the position of the unit roller structure will be described below.

Due to use, a part of the roller main body 17 is worn out,
If workability becomes poor during plowing of leather, etc., remove the drive shaft from the boss 11 and remove the retaining ring 16.
After removing the unit roller structures 20a and 20, change the positions of the two similar unit roller structures, for example, if one of the two ends is noticeably polished,
By reversing the positions of d, the unit roller structures 17a and 17d are deformed by abrasion without changing the overall shape of the roller main body 17.
The position of can be reversed.

In the case of the unit roller structures 20b and 20c, by changing the direction of both of them and replacing them alternately, the shape of the crown-shaped roller, which is exactly the same as before the replacement, remains unchanged, together with the unit roller structures 20a and 20d, which were not changed. Only the position of the unit roller structure, which is particularly susceptible to wear, is changed. To replace these, remove the retaining ring 16 screwed onto the boss 11, and
1 from the roller main body 17 and disassembled into unit roller structures, and in the case of the second replacement, by replacing with a unit roller structure prepared in advance, For example, by replacing only two of the unit roller components, it will be as good as new.

As mentioned above, the boss for inserting the drive shaft is made removable, and the roller main body attached to this boss is divided into multiples of 2 to form a unit roller structure in which at least two of each have a similar shape. However, when attaching to the boss, it is possible to change the mounting position between two similar roller components, so in the case of one edge of the roller, it is possible to replace only that part,
By replacing the unit roller structures at the same position, the rollers can be used for a long period of time, and compared to replacing the entire unit, the rollers can be used interchangeably at a much lower cost and are resource-saving.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional feed roller and drive shaft.
Figures 2 to 5 all show one embodiment of the feed roller of this invention, with Figure 2 being an exploded perspective view, Figure 3 being a perspective view of the roller assembly and boss immediately before assembly, and Figure 3 being a perspective view of the roller assembly and boss immediately before assembly. FIG. 4 is a perspective view when the assembly is completed, and FIG. 5 is a cross-sectional view of the state shown in FIG. 4. 11... Boss, 12... Tsuba, 13... Warizo, 1
4...Screw part, 15...Key, 16...Retaining ring,
17... Roller main body, 18... Hole, 19... Keyway, 20a to 20d... Unit roller structure, 2
1... Rowlet.

Claims (1)

[Scope of utility model registration request] The boss for inserting the drive shaft is made removable, and the main body of the roller to be attached to this boss is divided into multiples of 2 to form a unit roller structure in which at least two of each have a similar shape. A feed roller characterized in that the mounting position of two similar roller structures can be changed when mounted.