JPS5921612Y2 - Clutch device in binding machine - Google Patents

Description

[Detailed description of the invention] The present invention is a clutch mechanism of a binding machine for intermittently rotating a knot by the operation of a door. The purpose of this is to prevent the clutch from engaging once by holding the clutch body, thereby making the clutch mechanism operate more smoothly and reliably.

In this type of clutch mechanism, the clutch is operated by the rotation of the cam body due to the rotation of the door shaft, but in conventional devices, the contact position between the cam body and the roller shifts from the recess of the cam body to the circumferential surface. Since this involves a sudden change in the position of the clutch spring receiver, there is a risk of abnormalities such as the clutch engaging once even during binding work.

This invention combines a clutch spring receiver that operates by contacting a cam body with a clutch arm body via a packer shaft and a spring body, and when the clutch is activated, the tip of the clutch arm body first comes into contact with the cam body. The clutch spring receiver is held in place, the clutch pin is securely released, and the clutch is operated smoothly and reliably.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

A culm rake rod 2, a tying needle 3, and a culm receiving rod 4 are arranged on one side of the tying passage 1 at the end of the tying passage 1, and a knot building is provided on the other side of the tying passage 1. , a knot 5 consisting of a string holder, etc. is provided.

In addition, the culm receiving rod 4 that supports the door 26 is connected to the door shaft 6.
An operating arm 7 is fixed to the lower end of the door shaft 6, and a projecting pin 8 is projected from the tip of the operating arm 7, which is bored into the rear end of the clutch arm 9. It is engaged with the elongated hole 10.

A spring support piece 11 is fixed to the tip side of the clutch arm 9, and the clutch arm 9 is attached to the packer shaft 12.
A catch 15 for receiving and receiving the clutch spring 14 is protrudingly provided on one side of the clutch spring receiver 13, which is pivoted concentrically with the clutch spring receiver 13, and a roller 16 is rotatably pivoted on the other end arm 13a. A bolt 17 passing through the clutch spring 14 is installed between the spring receiving piece 11 fixed to the clutch arm 9 and the catch seat 15 fixed to the clutch spring receiver 13.
Screw the nut 18 onto the tip threaded portion 17a of 7.

A clutch pin 21 that moves up and down in the axial direction is fitted near the outer periphery of a clutch cam 20 fixed to a clutch shaft 19,
A protrusion 22 protruding from the end side of the clutch arm 9 is configured to engage and disengage from a notch (not shown) of the clutch pin 21.

The clutch pin 21 is a spring provided at the bottom of the clutch pin 21, which faces the clutch cam 20 and constantly presses upward against the clutch gear 23 provided at the top. 20, the clutch pin 21, and the clutch gear 23 constitute a one-turn clutch 24.

The outer periphery of the clutch cam 20 has a circumferential surface 20 a that contacts the roller 16 of the clutch spring receiver 13 and a concave circumferential surface 2 .
0 b, and the roller 1 of the clutch spring receiver 13
When the clutch spring receiver 13, the clutch arm 9, and the operating arm 7 are connected to each other in an appropriate manner, the culm receiving rod 4 is configured to rotate.

When the tying machine operates, the planted culm is pulled up at an appropriate angle by the lifting protrusion of the pulling device, and the base of the plant is harvested by the reaping device, and at the same time, the culm is conveyed on the culm guide plate by the horizontal conveyor. The shell culm is guided into the bundling passage 1 of the bundling device, and is scraped into the bundling passage 1 by the culm scraping rod 2, and the scraped culm is stopped by the culm receiving rod 4.

When the amount of the culm that has been scraped reaches a certain amount, the culm retaining rod 4 rotates counterclockwise around the door shaft 6, as shown in Figures 4 and 5. The clutch arm 9 rotates clockwise (in the direction of arrow α) about the packer shaft 12 while compressing the clutch spring 14 by the interlocking actuating arm 7.

FIG. 4a shows the clutch disengaged state, and the clutch cam 20
The gap S1 between the tip of the clutch arm 9 and the clutch arm 9 is the movement distance S2 of the clutch arm 9 until the clutch pin 21 is activated.
(See Figure 4) (S1=S2).

In the one-turn clutch 24, when the protrusion 22 of the clutch arm 9 comes off the notch of the clutch pin 21, the clutch pin 21 protrudes upward due to the pushing force of the spring and comes into contact with and engages the constantly rotating clutch gear 23. As a result, the binding clutch is engaged (in Fig. 4, the clutch spring 14 is compressed so that Sl<82), and the clutch cam 20 and clutch shaft 19 rotate in the direction of the arrow β and are interlocked with this. The knotting section 5 is activated and the knotting operation is performed at the same time.

While the roller 16 that is in contact with the outer circumference of the clutch cam 20 is in contact with the cam circumferential surface 20 a (from the position shown in Figure 4 to the position shown in Figure 4 C), the actuating arm 7 is in a free state and the clutch arm is closed. 9 and the clutch spring receiver 13 are in a stopped state, and if the clutch cam 20 continues to operate,
The roller 16 enters the recessed peripheral surface 20b of the clutch cam 20.

While the clutch arm 9, clutch spring 14, and clutch spring receiver 13 slide on the guide wall, the packer shaft 12
When it rotates clockwise [in the direction of arrow γ (Fig. 4 d)], the culm retaining rod 4 rotates outward of the binding passage 1, and at the same time, it moves out of phase with the door shaft 6. The culm release tool 25 is rotated clockwise to complete the binding and release the culm outward from the binding passage 1.

The roller 1 is pivotally connected to the clutch spring receiver 13.
6 is caused by the rotation of the clutch cam 20.
When moving from the concave circumferential surface 20b to the circumferential surface 20a (positions from FIG. 4 d to FIG. 4 e), the clutch spring receiver 13
is gradually lifted, and the culm retaining rod 4 rotates clockwise and returns to its original position.

When the clutch arm 9 returns to its original position, the protrusion 22 of the clutch arm 9 rotates and comes into contact with the notch of the clutch pin 21, pressing the clutch pin 21 downward against the spring.

Then, the engagement between the clutch gear 23 and the clutch pin 21 is disengaged, whereby the clutch cam 20 interrupts one revolution and assumes the position shown in FIG. 4a.

As described above, the present invention combines a spring receiver and a clutch arm body that operate by contacting a cam body through a packer shaft and a spring body, and when the clutch is operated, the tip of the clutch body first comes into contact with the cam body. Since the clutch spring receiver is held close to the circumferential surface of the cam body, the roller pivotally connected to the clutch spring receiver is rotated by the rotation of the clutch cam.
When transitioning from the concave peripheral surface of the clutch cam to the circumferential surface,
The roller of the clutch spring receiver is lifted close to the circumferential surface of the cam body, and the protrusion of the clutch arm smoothly engages with the notch of the locking pin, ensuring reliable operation of the one-turn clutch. This prevents the waste straw from entering and being released without being tied up.

In some clutch mechanisms of this type, a collar is interposed as a stopper in the clutch spring body, but in the present invention, this collar may be omitted.

[Brief explanation of drawings]

FIG. 1 is a plan view of a clutch mechanism according to the present invention, FIG. 2 is a partial sectional view as viewed from the side, and FIG. 3 is a perspective view. FIGS. 4a to 4e are schematic diagrams showing the operation of the clutch mechanism according to the present invention in plan view, and FIG. 5 is a plan view showing the operation of the clutch mechanism and the door. 6... Door shaft, 9... Clutch arm, 12... Packer shaft, 13... Clutch spring receiver, 14... Clutch spring, 16
...Roller, 17 ...Bolt, 19
...Clutch shaft, 20...Clutch cam, 21...Clutch pin.

Claims (1)

[Scope of utility model registration request] A culm release tool is disposed on one side of the bundling passage so as to be out of phase with a culm raking rod, a tying needle, and a culm receiving rod that is interlocked and connected to a tying clutch device, and a culm release tool is disposed on the other side. In a binding machine that has a knot section consisting of a knot building and a string holder, and these are linked appropriately, the cam body is
A part of the circumferential surface is cut out to form a circumferential surface section 20a and a four-part circumferential surface section 20b to form a clutch cam 20 fixed to the clutch shaft 19, and the engagement side with the operating arm 7 interlocked with the door is formed. A clutch arm 9 having a V-shaped bent portion and a clutch spring receiver 13 and a clutch arm 9 which is pivotally supported by a packer shaft 12 is provided on both the cam body contact side and the clutch spring receiver 13. A roller 16 that comes into contact with the peripheral surface of the clutch cam 20 is provided in the part, and a clutch spring 14 is interposed between the clutch spring receiver 13 and the clutch arm 9,
The contact side tip of the clutch cam 20 of the clutch arm 9 is positioned at least outwardly from the contact surface of the roller 16 with respect to the clutch shaft 19 and in front of the rotation side of the clutch cam 20 with respect to the roller 16, and the clutch cam 20
A clutch device for a binding machine, characterized in that the tip of the clutch arm 9 comes into contact with the clutch spring receiver 13 before the roller 16 when the clutch arm 9 rotates.