JPH01109097A - Cutter for rubber hose - Google Patents

Abstract

PURPOSE: To cut a rubber hose to a prescribed length accurately by forwarding the rubber hose at a prescribed speed along a guide member and retreating at a slow speed after stopping at the point of time when its tip passes a detection means and providing a supply means for stopping at the detection means passing time. CONSTITUTION: A rubber hose H supplied forward by rubber hose supply means 1A, 1B is guided and moved with a small resistance in the guide members 22-24 with a favorable sliding property and stopped at the point of time when its tip passes a detection means 3A. In this state, the rubber hose H is compressed and deformed in a length direction by the resistance received in moving. Thereafter, the rubber hose H is retreated at the slower speed than its advance time and stopped at the place where its tip passes the detection means 3A again. Meantime, the compression and deformation of the length direction of the rubber hose H are dissolved and the rubber hose H is guided by the guide members 22-24 without meandering. In this state, the cutting member 51 is lowered and the rubber hose H is cut accurately to a prescribed length by the cutting member 51.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cutting device that accurately cuts continuously supplied rubber hose into arbitrary set lengths.

[Prior Art] A thin-walled rubber hose with a relatively small diameter of about 10φ has a large amount of free deformation, so it is necessary to develop a device to cut it into a predetermined length. Conventionally, for example, a device as shown in Fig. 4 was used. are doing.

In the figure, the continuous rubber host I is the guide roller 63
The feed rollers 62, which are movable up and down, are lowered and pressed against the feed rollers 61 to be fed forward to the next guide belts 7A and 7B.

A pair of guide belts 7A and 7B are provided above and below in the same direction as the supply belt 61, and the rubber hose H is connected to the cholera held 7.
It is supplied between A and 7B. The rubber hose H is held in a substantially straight state by the guide belts 7A, 7B and guide plates 71, 72 (Fig. 5) provided on both sides of these belts, and the hose tip is moved by the detection photoelectric switch 3A, 3B provided at an arbitrary setting position. When the supply roller and belts 7A and 7B stop, the supply belt 61 and the guide belt 7
A cutting blade 51 provided between A and 7B descends to cut the rubber hose H to a predetermined length.

Note that 8A and 8B in the figure are detection photoelectric switches provided to determine the vertical movement timing of the supply roller 62, and when the hose tip reaches this position, the supply roller 62
is forced to rise.

[Problem to be solved by the invention J] By the way, according to the above conventional structure, since the rubber hose is pulled between the upper and lower guide belts, it is unavoidable that the hose stretches, and the guide plate is not connected to the guide belt. Because the rubber hose is provided with a certain amount of clearance on both sides, it is easy for the hose to meander, and due to these factors, even if the end of the rubber hose is positioned and cut as described above, the length of the hose after cutting will vary considerably. There was a problem.

SUMMARY OF THE INVENTION The present invention aims to solve these problems and to provide a rubber hose cutting device that can accurately cut a soft rubber hose to a desired length.

[Means for solving the problem] The configuration of "Ki-ni" El is explained in Fig. 1 and Fig. 2.
The rubber hose cutting device is actuated by an external signal to feed the continuous rubber hose H forward at a predetermined speed or backward at another predetermined speed slower than the above speed, and has good sliding properties. The rubber hose supplying means I has a guide surface having a slightly larger cross-sectional shape along the outer periphery of the rubber hose (I).
a guide member 2 that receives and guides the rubber hose I supplied from A,]B; detection means 3A and 3B that are provided at predetermined positions along the guide member 2 and detect the passage of the tip of the rubber hose H; A cutting means 5 is provided at a predetermined position between the detection means 3A, 3B and the rubber hose supply means IA, IB, and is activated by an external signal to cut the rubber hose H, and the rubber hose supply means IA, IB are actuated. The rubber hose H is moved forward, and when its tip passes the detection means 3A, 3B, the rubber hose H is stopped, reversed and retreated, and when the tip of the retreating tip passes the detection means 3A, 3B again, the rubber hose H is stopped. The cutting means 5 is provided with a control means (encircle) for stopping the cutting means 5 and operating the cutting means 5.

[Operation 1] The rubber hose supplied forward by the rubber hose supply means is guided and moved within a guide member having good sliding properties with a small resistance, and is stopped when its tip passes through the detection means. In this state, the rubber hose is slightly compressed and deformed in the length direction due to the resistance received during movement.

Thereafter, the rubber hose is moved backward at a slower speed than when it was moved forward, and when its tip passes through the detection means again, it is stopped and cut.

[Effects] According to the device of the present invention, compressive deformation in the longitudinal direction of the rubber hose is eliminated by the backward movement during cutting, and the rubber hose is guided without meandering by the guide member having a cross-sectional shape along the outer periphery of the rubber hose. Therefore, the rubber hose between the cutting means and the detecting means has an accurate predetermined length, and variations in the length of the hose after cutting are extremely small.

[Example] FIG. 1 shows an example of the present invention. In the figure, IA,
IB is a hose supply roller provided vertically with a certain gap, and these supply rollers IA and 1B are rotated forward at high speed (for example, 35 m/m1n) or at low speed (for example, 35 m/m1n) by the drive mechanism of the enclosure. For example, it is reversed at a speed of 3 m/m1n).

The continuous rubber hose H is connected to the supply roller IA,
It is sandwiched between the IBrr 8 and fed forward to the next-stage guide device 2 when the roller rotates normally.

The guide device 2 extends horizontally and includes the supply roller IA,
The first half guide section 2a has a chevron-shaped tip that extends near the opposing part of the IB and follows the outer periphery of the roller, and the second half guide section 2b is provided at a small distance behind this guide section and also extends horizontally.
The first half guide part 2a is a prismatic guide member 2 made of a material with good sliding properties such as Teflon resin and having a through hole in the center that is slightly larger than the outer diameter of the rubber hose H.
1.

The second half guide part 2b is provided longer than the maximum cutting length of the rubber hose H, and as shown in FIG.
．． 24 is divided into upper and lower parts, and the lower part is also divided into left and right parts. Semicircular concave surfaces 25a and 25b having a slightly larger cross-section are formed along the outer periphery of the rubber hose H at the centers of opposing surfaces of the upper and lower guide members 22 to 24, respectively, and are supplied and guided by the supply rollers IA and IB. Device 2
The rubber hose H that has reached the above-mentioned guide members 21,22 to
24 through holes and concave surfaces 25a and 25b, the movement is guided with low resistance without meandering.

The upper guide member 22 and the pair of lower guide members 23.
24 is a holding plate 26.27.2 on the upper surface or lower surface, respectively.
8 and the retaining plate 27. of the lower guide member 23.24.
28 can be opened and moved in the direction of the arrow in the figure by a circuit mechanism.

A main dispensing chute 9 having an opening 91 facing the second half guide section 2b is provided below the second half guide section 2b, and the holding plate 27.2
The main dispensing chute 9 receives the falling rubber hose H when the opening 8 is opened and discharges it as a product.This main dispensing chute 9 receives the falling rubber hose H and discharges it as a product. An auxiliary dispensing chute 92 is attached for dispensing non-defective products.

In the second half guide section 2b, there are supply rollers IA on both sides in the middle,
An auxiliary optical fiber 4A (one is shown in the figure) and main optical fibers 3A and 3B are provided at a position close to the IB and at a predetermined position spaced apart from the IB.
, 3A, 3B face between the upper guide member 22 and the lower guide member 23, 24, and each pair is opposed to each other. Each of the optical fibers 4A, 3A, and 3B serves as an optical fiber switch.

Further, a cutting blade 51 is provided at an upper position between the first half guide part 2a and the second half guide part 2b and is supported by a drive cylinder 52 to constitute the cutting means 5, and when the cutting blade 51 is lowered, this part is cut. Rubber hose H is cut.

The supply rollers IA, IB, the drive cylinders 52 and the holding plates 27, 28 are operated by the circuit controller in the sequence described below.

The operation of the apparatus will be explained below with reference to the flowchart shown in FIG.

First, the supply rollers IA and IB are rotated forward at high speed to forwardly supply the rubber hose I to the guide device 2 (step 101).
). The rubber hose H passes through the through hole of the guide member 21, reaches between the concave surfaces 25a and 25b of the guide members 22 to 24, is guided horizontally with low resistance and without meandering, and passes through the auxiliary optical fibers 4A and 4B. Make this into sticky rice (Step 02). The rubber hose I is further advanced and passes through the main optical fibers 3A and 3B, causing them to become glutinous, and the supply rollers IA and IB are stopped (steps 103 and 104).

In this state, the rubber hose I (is slightly contracted and deformed in the length direction due to resistance during high-speed movement).

Therefore, the supply rollers IA and IB are then reversely rotated at low speed (step 105), and the rubber hose H is retreated until the hose tip passes through the main optical fibers 3A and 3B again and allows light to pass through the supply rollers IA and IB. , 1B (steps 106 and 107).

As a result, the deformation occurring in the rubber hose H is eliminated, and the rubber hose H is positioned within the guide device 2 without meandering or longitudinal deformation.

In step 108, it is confirmed that the tip of the rubber hose H has not retreated beyond the auxiliary optical fibers 4A, 4B, and if it has retreated, it is determined that the feeding is abnormal and the auxiliary dispensing chute is advanced in step 113. ), cutting blade 51
is operated downward (steps 109 and 110) to cut the rubber hose I4. Thereafter, the lower guide member 27.2
8 is opened and the rubber hose 4 after cutting is discharged (steps 111 and 112).

In this way, accurately cut rubber hoses can be obtained. According to experiments conducted by the inventors, the present cutting device can reduce the variation in cutting length to about 1/10 compared to the conventional cutting device.

Incidentally, in the above-mentioned embodiment, an auxiliary optical fiber is not particularly required since abnormalities in feeding hardly occur.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, FIG. 1 is a schematic perspective view of a cutting device, and FIG. 2 is a cross-sectional view of a guide device, taken along the line ■-■ in FIG. 1. 3 are sequence flowcharts of the cutting device, FIGS. 4 and 5 show conventional examples, FIG. 4 is a schematic perspective view of the cutting device, FIG. 5 is a sectional view of the guide section, and FIG. FIG. 2 is a sectional view taken along line v-v of IA, IB... Rubber hose supply roller (rubber hose supply means) 2... Guide device 21.22.23.24... Guide member 25a, 25
b... Concave surface (guide surface) 3A, 3B... Main optical fiber (detection means) 4A, 4B... Auxiliary optical fiber (auxiliary detection means) 5... Cutting means 51... Cutting blade 52. ...Drive cylinder I4...Rubber hose 2nd WI

Claims (2)

[Claims] (1) A rubber hose supply means that is activated by an external signal to supply a continuous rubber hose forward at a predetermined speed or retreat at another predetermined speed slower than the above speed, and the rubber hose is made of a material with good sliding properties; a guide member having a guide surface with a slightly larger cross-sectional shape along the outer periphery of the rubber hose for receiving and guiding the rubber hose supplied from the rubber hose supply means; a detection means for detecting passage of the tip; a cutting means provided at a predetermined position between the detection means and the rubber hose supply means and actuated by an external signal to cut the rubber hose; and a cutting means for activating the rubber hose supply means to cut the rubber hose. At the same time, when the tip of the rubber hose passes through the detection means, the rubber hose is stopped, and then reversed and retreated, and when the tip of the retreating tip passes the detection means again, the rubber hose is stopped and the cutting means is activated. A rubber hose cutting device comprising a control means for cutting the rubber hose. (2) An auxiliary detection means is provided along the guide member at a position spaced apart from the detection means by a certain distance toward the rubber hose supply means, and the control means is arranged such that the tip of the rubber hose passes through the detection means when retracting and The rubber hose cutting device according to claim 1, wherein the rubber hose cutting device is configured to detect abnormality in rubber hose feeding when the rubber hose has not passed through the auxiliary detection means.