JPS59182723A - Borer for endless rubber belt for delivery of papers - Google Patents

Abstract

PURPOSE:To easily obtain a perforated endless rubber belt for delivery of papers by suction force by a method in which an endless rubber belt is laid between paired pulley in a tensed state and bored by a punch and a die provided between the pulleys. CONSTITUTION:In providing large numbers of holes 25 in a endless rubber belt 3 for delivery of papers while sucking them, the endless rubber belt 3 is laid between paired pulleys 1 and 2 in a tensed state (preferably in the same state as in practically tensed use condition) and bored by pressing is from both sides by a punch 4 and a bottom die between the paired pulleys 1 and 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endless rubber belt perforation device for conveying paper sheets.

Endless belts are commonly used in office equipment such as plain paper copying machines, diazo copying machines, and facsimile machines to transport paper sheets. There are two methods: one uses the frictional force generated between the belt and the endless belt, and the other uses the suction force by sucking paper sheets through nine holes provided in the endless belt.

The present invention relates to an endless belt using the latter method, and more specifically, to an apparatus for forming suction holes in an endless belt.

Conventional endless belts of this type are made of rubber materials with high friction resistance, cotton cloth, rigid fiber cloth, etc. as reinforcing members, in order to ensure frictional resistance between the pulleys and the tension during use. It has a configuration that embeds. Therefore, the elongation of the endless belt itself is almost negligible (
In order to successfully transmit rotational force to this endless belt using a pulley, it is necessary to reduce the tolerance of the diameter of the pulley and to apply considerable tension by adjusting the fixing position of the pulley.

For this reason, the manufacturing of the pulley requires great care and skill, which not only takes time but also requires a motor for driving the pulley.
Bearings have drawbacks such as a large load being applied to the parts, which shortens the life of the lamp.

In view of this, in the present invention, an endless rubber belt having no reinforcing member at all is used as the endless belt.

In this case, as in the conventional endless belt, the endless rubber belt is folded in half and a large number of suction holes are formed at regular intervals by inserting a perforation bonder at predetermined intervals, as shown in Fig. 8. Even if you try to drill a large number of suction holes at two equal intervals using a plurality of punches that are set at equal intervals in advance, the ends will not be completely folded in half and will be curved. At the same time, since there are variations in the length of the endless rubber belt, the pitch of the suction holes at the ends is different from the pitch at other parts.

As a result, the elongation rate of the endless rubber belt changes, the circumferential speed of the endless rubber belt fluctuates, and the disadvantage is that paper sheets cannot be conveyed at a constant speed.

In addition, in order to eliminate this drawback, it is possible to fit an endless rubber belt to the mantle and punch holes for suction, but in this case, the outer diameter of the mandrel must be larger than the inner diameter of the endless rubber belt. Of course, it takes time and effort to attach the endless rubber belt. In addition, when the circumference from the en 1 to the rubber bell 1 changes, or when changing the pitch of the suction holes, etc., the outer diameter of the mantle.

It has drawbacks such as the need to change the distance between the punch and the punch.

An object of the present invention is to solve the above-mentioned drawbacks by providing a punching device that can punch a plurality of suction holes at equal intervals with a simple operation even if the circumferential length of an endless rubber belt changes. do.

In order to achieve this object, the perforating device of the present invention includes a pair of pulleys whose mutual spacing is adjustable in order to suspend an endless rubber belt for conveying paper sheets in an extended state.
It is characterized by having a punch and a die facing each other in the thickness direction, sandwiching an endless rubber belt for transporting paper sheets between a pair of pulleys.

The present invention will be explained in detail below with reference to the attached drawings showing examples.

Figures 1 and 2 are schematic diagrams showing the principle of the perforation device of the present invention. Figure 1 shows the state in which the endless rubber belt is suspended or removed, and Figure 2 shows the state in which the endless rubber belt is suspended or removed. This shows the state in which suction holes are drilled in the rubber heald.

(1) is a driving pulley C, (2) is a driven pulley, (3) is an endless rubber belt, (4) is a punch, and (5) is a die.

The driving pulley (1) is connected to a drive source such as a motor, and transmits rotational force to the endless rubber belt (3). The distance between the driven pulley (2) and the driving pulley (1) can be adjusted, and both pulleys (1) and (2)
As shown in Figure 1, by reducing the interval between
The endless rubber belt (3) can be easily suspended and removed. Also, both pulleys (1)
By increasing the interval (2), as shown in FIG. 2, the endless rubber belt (3) can be stretched by 2 to 3%, giving the same tension as when in use.

In this state, the endless rubber bells 1 to (3) located between both pulleys fil (21) are in an extended state, so by reciprocating the punch (4), the plurality of suction holes are equally spaced. Then, by running the endless rubber belt (3) for a predetermined length and reciprocating the punch (4), a plurality of suction holes are again bored at equal intervals. By repeating the operation, a large number of suction holes (25) can be bored at 9 equal intervals around the entire circumference of the endless rubber belt (3).
(See Figure 3). After that, by bringing both pulleys (1) (21) closer together, the endless rubber belt (3) can be easily removed.

Endless rubber belt manufactured as described above (3
) to transport the paper sheets (26), air can be sucked through the suction hole (25), and the paper sheets (26)
) can be fed at the same speed as the endless rubber heald (3) (see Figure 7).

FIG. 4 is a front view of the punching device, and FIG. 5 is a side view of the center longitudinal section of FIG. 4.

(1) is a driving pulley, (2) is a driven pulley, (3) is an endless rubber belt, (4) is a punch, and (5) is a hole with a slightly larger diameter than the punch (4). For example, the die has a hole with a large diameter of 20 μm), and
) is a motor that transmits rotational force to the driving pulley (1), (7) is a cylinder device that horizontally moves the driven pulley (2) to adjust the distance between it and the driving pulley (1), and (8) ) is a spur gear, (9) is a spur gear (8)
(10) is a cylinder device that reciprocates the rack (9), and (11) is a rack that engages with the rack (
(9) is a stopper that regulates the amount of movement of the punch (4); (12) is a cylinder device that lowers the punch (4);
3) is a pressing plate that holds the endless rubber belt (3) between it and the die (5) when the punch (4) is lowered.

Furthermore, (14) and (15) are the guide shafts, and (16)
are coil springs, (17) and (18) are bearing cases, (19) and (20> are cam clutches, (21) and (22) are timing pulleys, and (23) is a timing belt. , (24) is a scrap removal port.

The operation of the punching device configured as described above is as follows.

If the driven pulley (2) approaches the driving pulley (1) by operating the cylinder device (n), the endless rubber belt (3) can be easily moved between both pulleys (11F21
can be suspended between and then the cylinder device (7)
By moving back, both pulleys (11 (2+) are separated, and the endless rubber belt (3) is stretched by about 2 to 3% to give the same tension as when in use, thereby completing the preparation for the drilling operation.

Thereafter, the punch (4) is punched by the cylinder device (12).
) is lowered, first the endless rubber belt (3) is held between the press plate (13) and the die (5), and then only the punch (4) is lowered to release a plurality of pieces onto the endless rubber belt (3). A suction hole (25) can be formed. Next, cylinder mounting W〈12)
The punch (4) is raised, and the endless rubber belt (3) is made to travel a predetermined distance in the following manner. That is, the rack (9) is moved forward by the cylinder device (10), the forward movement of the rack (9) is converted into rotational force by the spur gear (8), and this rotational force is transferred to the cam clutch (19) and the bearing case. (17) and (18) to the driving pulley (1), which allows the endless rubber belt (3) to travel a predetermined distance, then the cam clutch (19) is disengaged and the cylinder device (10) Move the rack (9) back and prepare for the next run of the endless rubber belt (3).

After that, the punch (4) is lowered and raised, and the rack (
By repeating the forward and backward movements of step 9) a desired number of times, the suction holes (
25) can be drilled.

After perforating the endless rubber belt (3) as described above, the cylinder device (the driven pulley (by force)
2) is brought close to the driving pulley (1) and the endless rubber belt (3) is easily removed in preparation for the next drilling operation.

In addition, the scraps generated during the drilling operation are removed from the die (5).
The waste removal port (24
) can be easily taken out. As is clear from the above explanation, even if the circumference of the endless rubber belt (3) changes, the suction holes (25) can be accurately drilled by simply changing the interval between the pulleys fl) [2). I can do it.

In addition, in the above embodiment, both pulleys (1) (2
) is made smaller than the width of the endless rubber belt (3) (see Figure 6).

This is to automatically position the center of the pulley (11 (2+) and the endless rubber belt (3). After applying a predetermined tension to the endless rubber belt (3), the motor (6) rotates. The force is applied to the timing pulley (21), timing belt (23), timing pulley (22), and bearing case (17).
(18) to the driving pulley (1), the center can be positioned by simply running the endless rubber belt (3) about 10 times. To explain in more detail, the endless rubber belt (3) has both pulleys (11 (when suspended in an extended state between 21, both end edges are pulleys +1) (at both end ends of 21 in the direction of the rotational axis). This prevents the endless rubber belt (3) from meandering left and right during the circular movement, and by making the circular movement about 10 times, the width of the curved part in the direction of the rotation axis becomes equal, completing the center positioning. Therefore, the pulley can be made into a simple cylindrical shape, making it easy to manufacture the pulley, and the operator does not have to perform any special work for centering, making it possible to create an endless rubber belt as a whole. It is possible to simplify the drilling work for the suction holes (25) and increase the pitch accuracy of the suction holes (25).However, if the difference in width between the pulley and the endless rubber belt is too small, the positioning will not be effective. , if the difference is too large, the endless belt will move to other parts (e.g. pulley drive shaft)
Because of the rubbing, the ratio of the widths of the two should be approximately 1.15 to 1.5:
It is preferable to spell it as 1.

As described above, the present invention provides a system in which the mutual spacing is adjustable.
An endless rubber belt for transporting paper sheets is suspended in an extended state between a pair of pulleys, and the punching and endless rubber belt travel a fixed distance between the pair of pulleys improves the pitch accuracy of the suction holes. It not only makes it easier to suspend and remove the endless belt, but it also has the unique effect of improving the efficiency of the drilling operation as a whole.

In addition, if the width of the pulley is made smaller than the width of the endless rubber belt, the special work for centering the endless rubber bells 1 to 1 becomes inconsequential, making it easier to manufacture the pulley. , the drilling efficiency can be further improved.

[Brief explanation of drawings]

Figures 1 and 2 are schematic diagrams showing the principle of the present invention. Figure 1 shows the state in which the endless rubber belt is suspended and removed, and Figure 2 shows the endless rubber belt with suction holes. 3 is a perspective view of the endless rubber bell 1 to show the state in which drilling is completed, FIG. 4 is a front view showing the specific configuration of the drilling device, and FIG. 5 is a side view of the central vertical section of FIG. 4. Figure 6 shows the relationship between the cone dress rubber belt and the pulley. Figure 7 is a schematic diagram showing how the perforated endless rubber belt is used. Figure 8 shows how the endless rubber belt is folded in half and perforated. Schematic diagram showing the state. (1)... Driving pulley, (2)... Driven pulley, (3)... Endless rubber bell l-, (4)...
Punch, (5)...tie. Patent applicant: Sumitomo Rubber Industries, Ltd. Figure 1 Figure 2 Figure 3 Figure 6 Figure 3 Figure 7 Figure 8

Claims (1)

[Scope of Claims] 1. It has a pair of pulleys whose mutual spacing is adjustable to suspend an endless rubber belt for transporting paper sheets in an extended state, and a belt for transporting paper sheets is provided between the pair of pulleys. An endless rubber belt perforation device for conveying paper sheets, characterized by having a bunch d3 and a die facing each other in the thickness direction while sandwiching the endless rubber belt. 2. An endless rubber belt perforation device for transporting paper sheets as claimed in claim 1, in which the endless rubber belt for transporting paper sheets is suspended in an extended state by a pair of pulleys, and the same tension as in use is given to the endless rubber belt for transporting paper sheets. . 3. The endless rubber belt perforation device for conveying paper sheets according to claim 1, wherein the width of the pulley is smaller than the width of the endless rubber belt for conveying paper sheets.