JPH0633790Y2 - Stem culm bundling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is provided with a pressure sensitive member that is displaced against the biasing force of a spring for setting the focusing pressure as the focusing pressure increases. The present invention relates to a stem-cullet binding device configured to activate a one-rotation clutch for binding operation via an operating member when a displacement amount due to an increase in focusing pressure reaches a predetermined amount.

[Conventional technology]

Conventionally, as a stem-culm bundling device configured as described above, there is one shown in JP-A-63-102612, and in this reference, a spring for setting a focusing pressure is configured as a compression type and The pressure member is a rotary type.

[Problems to be solved by the device]

Here, considering the binding operation by taking the stem-culm binding device of the above-mentioned example as an example, the cutting stems are fed into the binding space by the scraping movement of the packer, and the cutting stems fed into the binding space are fed. As the amount of culms increases, the packer's scraping movement force is more strongly transmitted to the pressure-sensitive member via the cutting stems.

Then, when the cutting culm in the binding space reaches a predetermined amount, the scraping motive force of the packer displaces the operation member linked with the pressure-sensitive member by a predetermined amount against the biasing force of the spring for setting the focusing pressure. The binding operation is started.

However, as described above, in the structure in which the spring is applied to the pressure-sensitive member, the pressure-sensitive member may be largely retracted at the timing when the scraper motive force of the packer is applied, and the binding string may be loosened.

In other words, in this type of stalk-and-bundle binding device, the direction in which the pressure-sensitive member is retracted by the motive force of the packer is the same as the direction in which the string between the string holder and the needle is stretched, and the pressure-sensitive member is largely moved during the binding operation. When retracted, the cord is pulled out from the needle by this retraction, and as a result, the cord is in a slack state, and when the cord is bound, the cord is in a loose state, which may result in a bundled stem culm that is not well organized.

Incidentally, in one bundling operation, the packer retracts the pressure sensitive member at the timing of starting the bundling operation as described above and at the timing immediately before the start of the operation of the needle. The latter of the timings also causes the string to loosen.

Therefore, it is possible to increase the urging force of the spring for setting the focusing pressure, but simply increasing the urging force increases the amount of cutting stem culms that are bundled at once, and the diameter of the bundled stem culm bundle is increased. However, there is not much improvement in the looseness of the string.

An object of the present invention is to obtain a stalk-and-bundle binding device which is less likely to cause loosening of the binding cord by reasonable modification.

[Means for Solving the Problems]

The feature of the present invention is that, as described at the beginning, the pressure sensitive member that is displaced against the biasing force of the spring for setting the focusing pressure is operated when the displacement amount of the pressure sensitive member due to the increase of the focusing pressure reaches a predetermined amount. In a stalk-and-bundle binding device configured to activate a one-rotation clutch for binding operation via a member, the pressure-sensitive member is further displaced toward this side based on a point displaced to a position at which the one-rotation clutch is activated. Is provided with a displacement limit setting mechanism that determines the limit of the movement of the operation member that interlocks with the pressure-sensitive member by contact with a member that serves as a reaction force receiving member of the focus setting spring. Yes, its action and effect are as follows.

[Action]

According to the above feature, when the displacement amount of the pressure-sensitive member reaches the amount that activates the one-rotation clutch with the increase of the pressure of the concentrated stem culm, the displacement of the operating member due to the displacement of the pressure-sensitive member is caused. When the one-rotation clutch for binding operation is activated and the pressure continues to increase, the displacement limit toward this side is based on the point at which the pressure-sensitive member is displaced to the position where the one-rotation clutch is activated. The displacement limit setting mechanism that determines the displacement limits the displacement, so that the pressure-sensitive member does not retreat significantly.

Further, since the retreat of the pressure-sensitive member is restricted after the one-turn clutch is activated in this way, a high pressure acts on the collected cutting stalks to bind them in a compressed state.

[Effect of device]

Therefore, by a relatively simple modification of providing a displacement limit setting mechanism that can be configured with a stopper or the like, a stem-and-bundle binding device in which the phenomenon of pulling extra strings from the needle during binding is eliminated and the binding strings are less likely to loosen can be obtained. It was.

In particular, in the present invention, since the cord is wound around the compressed cutting culm, the swelling of the cutting culm after bundling causes the string to be strained, and the loosening of the string is further unlikely to occur.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

As shown in Fig. 4 and Fig. 7, a pair of left and right weeding tools (1), (1), a single raising device (2), a clipper-type mowing for cutting the planting stem culm A device (3), a back plate (4) for supporting the cutting stalks from the rear, and a bundling unit for discharging a predetermined amount of the cutting stalks sent to the right side of the machine body while being supported by the back plate (4). Each of the devices (A) is provided in the front part of the airframe having a single traveling wheel (5), an engine (6), and a steering handle (7) to form a binder.

As shown in FIGS. 4 and 5, the binding device (A)
Is a packer (8) for feeding the cutting stems into the binding space (S), a needle for winding a string (not shown) around the cutting stems fed in the binding space (S) in a standing posture, and a string guide plate (8). The knot building (11) provided in (10), the string holder (12), the discharge arm (13) for sending the bundle stems to the outside of the machine, and the sensing as a pressure-sensitive member for starting the binding operation. It has a door (14).

As shown in FIGS. 3 to 5, the packer (8) constantly receives power from a rotary shaft (16) protruding above the binding case (15) through a crank arm (not shown), The knot building (11), the timing gear (17) for driving the string holder (12), and the needle (9) include a drive shaft (18) for driving a crank arm (not shown) of the needle (9). The transmission system is configured so that power is transmitted through the one-rotation clutch (C) provided coaxially.

As shown in FIGS. 1 to 3, a one-turn clutch (C)
Is a gear (19) that is loosely fitted in the drive shaft (18) and constantly rotates
And a transmission projection (20) provided on this gear (19),
The rotation cam (22) connected to the drive shaft (18) via the key (21) and the end of the rotation cam (22) that is formed by rocking.
Is pivotally supported by the rotating cam (29) so that it can be switched between the posture (interfering posture) that enters into the rotational locus of the vehicle and the rotational trajectory of the transmission projection (20) that is separated from the end (posture that does not interfere). The clutch arm (23), the swing shaft (24) of the sensing door (14), the arm (25), and the engaging pin (26).
And an operating member (27) linked through the rotary shaft (1
6) is swingably supported, and the operation member (27) is swingably supported around the pin (28), and is located at one end side of a compression spring (31) for setting a focusing pressure described later. Spring receiving bracket (29) serving as a reaction force receiving member, and a focusing pressure setting that is externally fitted to the rod (30) extending between the spring receiving bracket (29) and the operating member (27). Compression spring (31), collar (32) fitted over the rod (30) to restrict excessive displacement of the sensing door (14), and roll shaft formed on the rotating cam (22) at the end of binding operation. Having a return arm (34) for forcibly restoring the operation member (27) by contact with the (33), the binding operation is performed as follows.

That is, when the cutting culm in the binding space (S) reaches a predetermined amount due to the scraping of the packer (8), the pressing force from the packer (8) transmitted to the sensing door (14) through the cutting culm is increased. By swinging the operating member (27) around the pin (28), the engagement between the locking claw (27a) formed on the operating member (27) and the clutch arm (23) is released. As a result, the clutch arm (23) swings in a posture in which it interferes with the transmission projection (20) by the urging force of the tension spring (35).

In addition, the swinging of the operating member (27) is thus performed against the biasing force of the compression spring (31), and further, the operating member (27) at the start of the operation of the binding device (A) in this manner. 2 and the collar (32) as a displacement amount setting mechanism for setting the maximum displacement amount in the swinging of the operating member (27) at the timing described later, as shown in FIG.
The large swing of 7) is blocked to prevent excessive displacement of the sensing door (14).

The collar (32) is an example of a displacement limit setting mechanism for setting the maximum displacement amount of the operating member (27), and as described above, an excessive size of the sensing door (14) associated with the operating member (27). By regulating the displacement, it is possible to bind the stem culms to a state where the string is not loose.

Next, the transmission projection (20) comes into contact with the clutch arm (23) displaced by the swing, and the gear (19) and the rotary cam (22) start integral rotation, whereby the needle (9).
And the timing gear (17) start to operate in synchronization,
When the needle (9) winds a string around the stem culm in the binding space (S), the string is brought to the positions of the knot building (11) and the string holder (12) to form a knot.

By the way, even when the needle (9) winds the string around the stem culm, the packer (8) scrapes the stem culm into the binding space (S), so that the collar (32) senses at this timing as well. It is designed to prevent excessive swinging of the door (14).

Next, when the rotary cam (22) further rotates, the needle (9) starts to retract, and the roller (36) provided on the spring receiving bracket (29) causes the rotary cam (2) to move.
When the spring receiving bracket (29) reaches the concave surface (22a) of 2) and is allowed to freely swing around the drive shaft (16), the sensing door (14) is also in a freely swingable state. Reached
After that, the discharge arm (13) operates along the locus (T) shown in FIG. 4 to detect the sensing door (14).
The bundled stem culms are sent out without being disturbed.

Then, after the bundled stems have been discharged in this way, the roller (36) first contacts the outer peripheral edge of the rotating cam (22) to lock the locking claw (27a) of the operating member (27). The one-rotation clutch (22) is returned to the pre-starting posture and the clutch arm (23) is engaged with the locking claw (27a), so that the binding operation can be stopped.

As shown in FIGS. 5 and 6, the drive shaft (37) of the timing gear (17) is supported by the bracket (38) mounted on the upper surface of the binding case (15), the upper end side of which is supported. Arm portions (38a) and (38a) for attaching the string guide plate (10) to the (38), and the discharge arm (13).
A stay (38b) that supports the base end of the is integrally formed.

Further, as shown in FIG. 5, above the binding device (A), a fall prevention plate made of an elastic body (to prevent fall of stem stems fed into the binding space (S) to the outside of the machine ( 39) is further provided so that the planted stem culm can be smoothly raised, as shown in FIG. 4, the stem extends from the rear surface of the weeding tool (1) on the right side of the machine to the string guide plate (10). The rod (40) for guiding the culm is arranged in a smoothly curved manner.

[Another embodiment]

In addition to the above embodiments, the present invention can be implemented in various ways, for example, by configuring the displacement limit setting mechanism with a pin that regulates the displacement of the operating member, and the stem-culm binding device is provided in a combine or the like. Is also good.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a stem-culm bundling device according to the present invention.
FIG. 2 is a cross-sectional view showing the single-rotation clutch when stopped, FIG. 2 is a cross-sectional view showing the single-rotation clutch at the time of starting the binding operation, FIG. 3 is a cross-sectional view showing the linkage of the single-rotation clutch, and FIG. 4 is a binder. FIG. 5 is a side view of the binding device, FIG. 6 is a perspective view of the bracket, and FIG. 7 is an overall side view of the binder. (14) …… Sensing door, (27) …… Operating member, (29)…
… Reaction force receiving member, (31) …… Spring, (32) …… Displacement limit setting mechanism, (C) …… One-turn clutch.

Claims (1)

[Scope of utility model registration request] 1. A pressure-sensitive member (14) is provided which is displaced against the biasing force of a spring (31) for setting the focusing pressure as the focusing pressure increases. The pressure-sensitive member (14) increases the focusing pressure. Is a stem-and-bundle binding device configured to activate a one-rotation clutch for binding operation (C) via an operating member (27) when the displacement amount associated with the pressure-sensitive member (14). The displacement limit setting mechanism (32) that determines the limit of the displacement toward this side, based on the point where the clutch is displaced to the position where the one-rotation clutch (C) is activated, by using the reaction force of the focusing setting spring (31). A stem-and-culm bundling device provided at a position where movement of the operating member (27) interlocking with the pressure-sensitive member (14) is regulated by contact with a member (29) serving as a receiver.