JPH0146363B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a binding cord breakage sensing device for a binding machine used in a binder or combine harvester.

[Prior art]

A conventional device of this kind, as illustrated and explained in Japanese Utility Model Application No. 54-160640, has a movable piece that is placed in contact with the inside of a bundle of tying strings from which strings are sequentially drawn out from the inner periphery, and the tying work is carried out. As the advance string is gradually consumed and the inner diameter increases, the movable piece follows and displaces, and when the movable piece displaces beyond a certain level, for example, an alarm is activated.

In this prior art device, the tip of the arm of the movable piece is in contact with the inner circumferential surface of the binding string, so when the string is let out from the inner circumferential surface, it gets entangled with the tip of this arm and smooths the binding cord. There was a defect in which the string could not be fed out.

In addition, there was a drawback that it required a lot of work when setting the string bundle for the first time.

[Problem that the invention seeks to solve]

This invention aims to eliminate the defects of conventional devices and create a device that can be used for actual work.

In other words, by positioning a sensing body that detects a breakage of a string in contact with the outer circumferential surface of a bundle of tied strings from which strings are sequentially fed out from the inside (inner periphery), the sensing body can prevent any disturbance from occurring to the drawn-out string. This allows the tying string to be smoothly fed to the tying machine without having to feed the tying cord.

Furthermore, when setting a new bundle of tied strings in the string storage device, in the case of the above-mentioned conventional device, it is necessary to insert the movable piece into the inner periphery of the string bundle.

On the other hand, in the present invention, since the sensing body is simply pressed against the outer circumferential surface of the bundle of tied strings, the bundle of strings can be set relatively easily.

[Means to solve the problem]

In order to solve the above-mentioned technical problem, this invention
The following technical measures will be taken. That is, a string storage device is configured to store a bundle of tied strings that is wound to a certain thickness of string layer and fed out from the inside to a tying machine sequentially, and the string is inserted into the string storage device from above. A sensing element is provided at the bottom of the string storage device that presses against the lower outer peripheral surface of the stored bundle of tied strings while maintaining a predetermined spring pressure. When it becomes thinner than this, the string layer is recessed and moved inward, and the switch is turned on due to the movement of the sensing body.

〔Example〕

First, its configuration will be explained.

The storage case 1 has an open top, a receiving surface 6 for a bundle of binding strings at the bottom, and a string outlet 7 on one side, and can be fixed to the frame of a machine (for example, a combine harvester, a binder, etc.) as appropriate. It is worn and equipped.

The bundle of cords 2 is formed into a cylindrical shape with a constant thickness of cord layers, and is a so-called inner-wrap bundle of cords that can be sequentially drawn out from the string inside one side. It is covered with a thin resin film.

The sensing body 3 is composed of a sensing piece 8 and a switch 4.

First, the switch 4 is detachably attached to a mounting piece 9 fixed to the bottom surface of the storage case 1.

The sensing piece 8 is connected to the switch 4 to turn it on and off, and is inserted through an opening 12 formed in the receiving surface 6 of the storage case 1 to connect the binding string inside the storage case 1. It is provided to protrude from the receiving surface 6 so as to come into contact with the outer peripheral surface of the bundle 2.

The sensing piece 8 is provided in contact with the outer circumferential surface of the bundle of tied strings 2 with a constant pressing force by a spring 10.

Further, the sensing piece 8 and the switch 4 are such that when the sensing piece 8 presses the outer peripheral surface of the binding string bundle 2 with a constant pressure, the switch 4 is in the "off" state, and the sensing piece 8 is in the "off" state. The structure is such that the switch is turned on when it moves inside the bundle of binding strings due to its restoring force.

The alarm device 5 is installed near the cockpit of the aircraft (eg, combine harvester, binder), and is configured to issue an alarm when the switch 4 is turned on.

Note that the alarm device 5 is not limited to this, and may be a warning light, a machine stop device, a binding machine stop device, or the like.

The configuration of the sensing body 3 is also not limited to the configuration and mounting position of the embodiment.

Reference numeral 11 denotes a vibration isolating member that receives the bundle of tied strings 2.

Next, its effect will be explained.

First, tie the bundle of cords 2 to the vibration isolating member 1 of the storage case 1.
1, the sensing piece 8 protruding from the receiving surface 6 will be pushed downward (in the direction of arrow A) by its weight, so the sensing piece 8
moves downward (in the direction of arrow A) against the spring 10 and presses the outer circumferential surface of the bundle of tied strings 2 with a constant pressure. At this time, switch 4 is in the "off" position.

Next, the strings are sequentially fed out from inside the bundle of tied strings 2 through the string feeding opening 7 as the tying machine performs the binding operation.

In such a process of unwinding the binding cord, the sensing piece 8 is located on the outer peripheral surface of the bundle of binding cords 2, so that the cord is not disturbed and is smoothly unrolled.

Then, as the tying process progresses and the amount of string wrapped around the bundle of tied strings 2 decreases due to the consumption of strings, and the thickness of the string layer becomes thinner, the sensing piece 8 detects that the pressing force of the spring 10 overcomes the resistance force of the string layer. The string layer is turned inward and deformed together with the resin film.

That is, when the thickness of the string layer of the sensing piece 8 becomes thinner,
Due to its restoring force, the spring 10 moves inward of the bundle of tied strings 2 (in the opposite direction of arrow A), turning the switch 4 on.

Therefore, the alarm 5 is activated to alert the operator.

[Action/Effect]

This invention has a configuration in which a sensing body is provided which contacts the lower outer circumferential surface of the bundle of binding cords with a predetermined pressure so that the strings of the bundle of binding cords are drawn out sequentially from the inside of the cord storage device. When the remaining amount is running low, the sensor not only notifies the operator, but also has a unique sensor that does not cause any obstruction to the binding cord that is being fed out during the binding work and allows the binding cord to be fed out smoothly and reliably. It has an effect.

In addition, when storing a bundle of tied strings in a string storage device, although the string storage device has a sensing element, it can be loaded from the top very easily, and the movable piece can be set at a predetermined position on the inner circumferential surface of the string bundle as in the past. Alternatively, after setting the binding cord, there is no need to attach a band body to the upper side of the binding cord.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, with FIG. 1 being a side sectional view, FIG. 2 being a side sectional view showing the operation, and FIG. 3 being a front view. 1...Storage case, 2...Bundle of binding string, 3...Sensing body, 4...Switch, 5...Alarm device, 6...Receiving surface, 7...String feed opening, 8...Sensing piece, 9 ……
Mounting piece, 10... Spring, 11... Vibration isolating member.

Claims (1)

[Claims] 1. A string storage device capable of storing a bundle of tied strings wound to a certain thickness of string and sequentially drawn out from the inside, and the lower outer periphery of the bundle of tied strings inserted into the string storage device from above and stored. A sensing body that contacts the surface with a predetermined pressure is provided at the bottom of the string storage device, and the sensing body
A binding cord breakage sensing device for a speed tying machine having a structure in which a switch can be operated when the string layer thickness of the binding cord bundle becomes thinner and moves inward of the cord bundle.