JPH0112585Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, a binding machine in which a discharging arm is attached to a support member of a knot section via a link, and the discharging arm is operated by a bevel gear of the knot section linked to a one-turn clutch, has a drive pin attached to the bevel gear. One type has a stopper protruding from the bevel gear so that even after the bevel gear has stopped, the ejection arm continues to eject until it comes into contact with the stopper to improve bundle ejection performance, and the other type has the ejection arm connected to the bevel cam with a link so that the bevel cam stops. There was a system in which the ejection arm stopped at the same time, but in the former case, the ejection arm could stop at any point between the drive pin and the stopper, making the stopping position unstable and causing the ejection arm to stop at the stopper when stopped. As a result of the collision, not only the stopper is worn out but also the transmission device is damaged, and in the latter case, the ejection arm stops at a position that protrudes outward as shown by the solid line in Figure 1, which becomes a hindrance and prevents the bundle from being ejected. There were drawbacks such as low performance.

The purpose of the present invention is to improve the above-mentioned drawbacks, and the discharging arm is attached to the support member of the joint via a link, and is protruded from the bevel gear of the joint that is linked to the one-turn clutch. A binding machine in which a drive pin is connected to the discharge arm so as to be able to move toward and away from the discharge arm so that the discharge arm operates due to inertia even after the bevel gear stops during bundle discharge, wherein the discharge arm is provided with a locking portion, The support member is characterized in that an elastic stopper is attached to the support member, the elastic stopper facing within the rotation locus of the return stroke of the discharge arm and engaged by the locking member.

The embodiments shown in the drawings will be explained below.
Reference numeral 1 denotes a focusing transmission case provided at the bottom of the chain case 2, which includes a power transmission case 3, a needle 4, and a door 5.
A knot part 7 is provided in the upper part of the chain case 2 with a convergence part 6 in between, and the knot part 7 has a building 9 surrounded by a knot guide 8 and a holder 10.
, a joint shaft 11 operatively connected to a one-turn clutch activated by the sensing operation of the door 5 through a timing shaft and a chain case 2, and a bevel gear 12 attached to the joint shaft 11 for driving the building 9, the holder 10, etc. It consists of

Further, a boss 13a that is protruded from one end of the release arm 13 and constitutes a locking portion is connected to a ring body 14 at the base.
a is rotatably connected by a pin 15 to the tip of a crank arm 14 which is supported by the node shaft 11 via a bearing, and the other end of the ejection arm 13 is fixed by a link 16 and pins 18 and 19. It is connected to 17.

Further, as the bevel gear 12 rotates, the drive pin 20 protruding from the bevel gear 12 comes into contact with a protrusion 14b fixed to the crank arm 14, thereby operating the discharge arm 13.

A plate-shaped elastic stopper 23 is screwed onto the bracket 21 fixed to the fixing member 17, and has a recess 22 in the middle thereof, and the recess 22 faces within the rotation locus of the boss 13a.

When the above-mentioned bundling machine is installed at the straw discharge section of the combine harvester, the straw discharged from the culm of the threshing device is raked by the raking wheel toward the collecting section, and the bundler 3 further moves the waste straw to the collecting section. and converge on the front of the door 5.

When the bundled amount reaches a predetermined amount and the clutch is engaged once, the needle 4 winds the bundled straw around the bundled waste straw, and the bevel gear 12 operates to operate the bill 9 and holder 10, thereby tying the straw.

During this time, the drive pin 20 is rotating together with the bevel gear 12, but the discharge arm 13 has stopped at the position shown in FIG. 3 at the end of the previous bundle discharge.
The drive pin 20 rotates together with the bevel gear 12 under no load from the position shown in FIG. 1, comes into contact with the protrusion 14a at the position shown in FIG.
2 rotates a little over 20 degrees, the tip of the discharge arm 13 enters the focusing section and pushes the bundle backwards,
After removing the knots on the way, release the bundle.

At that time, the drive pin 20 pushes out the ejection arm 13 (protrusion 14a) to the position shown in FIGS. 1 and 3 (when the ejection arm 13 reaches the position shown by the chain line in FIG. 3), and the bevel gear 12 However, the discharge arm 13 continues to rotate further due to inertia, and stops when the boss portion 14a pushes up the elastic stopper 23 and enters the recess 22 thereof.

The stop position, that is, the start position of the discharge arm 13 is about 20 degrees before the end point a of the movement stroke of the rotation locus A, and at the initial stage when the discharge arm 13 enters the focusing section 6 from this position, it corresponds to the predetermined angle rotation of the bevel gear 12. Since the amount of movement is small, the starting torque of the ejection arm 13 is small and the ejection arm 13 can be started without difficulty, and the drive pin 20 can be moved to the protrusion 14.
It is possible to reduce the impact sound that collides with b.

In the present invention, as described above, the ejection arm is attached to the support member of the nodule part via a link, and the drive pin protruding from the bevel gear of the nodule part linked to the one-rotation clutch is connected to the ejection arm so as to be able to move toward and away from the said ejection arm. In the bundling machine, the discharging arm is configured to operate due to inertia even after the bevel gear stops during bundle discharging, the discharging arm is provided with a locking portion, and the supporting member is provided with a locking portion that is configured to rotate during the return stroke of the discharging arm. Since an elastic stopper facing into the trajectory and engaged by the above-mentioned locking member is attached, the ejection arm can rotate greatly due to inertia and eject the bundle far away, but it does not protrude outwards significantly. It doesn't get in the way.

In addition, during the return stroke due to inertia, the locking member engages with the elastic stopper and the ejection arm stops, so the stopping position can be kept constant, and when the arm stops, it can be stopped using a stopper protruding from a bevel gear. A large impact is not generated, and stopping noise and wear or damage of the transmission part can be prevented quietly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a front view of the binding machine, FIG. 2 is a sectional view of the main part, and FIG. 3 is a front view of the knot discharger. 6... Focusing part, 7... Nodule part, 11... Nodule shaft, 12... Bevel gear, 13... Release arm,
14...Crank arm, 14b...Protrusion, 20
... Drive pin, 23 ... Elastic stopper.

Claims (1)

[Claims for Utility Model Registration] (1) The ejection arm is attached to the support member of the joint part via a link, and a driving pin protruding from a bevel gear of the joint part linked to the one-turn clutch is moved toward and away from the said ejection arm. In the binding machine, the discharging arm is configured to be freely connected and operated by inertia even after the bevel gear stops during bundle discharging. A discharging device for a binding machine, characterized in that it is equipped with an elastic stopper that faces within the rotation locus of the stroke and is engaged by the locking member. (2) The discharging device for a binding machine according to claim 1, wherein the elastic stopper faces toward the end of the rotation trajectory of the discharging arm return stroke.