JPH04346712A - General-purpose knotter - Google Patents

Abstract

PURPOSE:To obtain a general-purpose knotter capable of knotting even article to be knotted such as soft and weak vegetable with proper tension force and maintaining good knotting operation even using a rubber string being readily expandable and having large coefficient of friction. CONSTITUTION:A knotter bill type knotting mechanism 3 capable of carrying out knotting operation using a rubber string 4 is provided and a string delivery resisting means capable of giving resistance to feeding of the rubber string 4 when the string is subjected to feed operation toward a knotting mechanism 3 of a needle 6 and permitting feeding of the rubber string 4 when the string is subjected to retreating operation toward waiting posture of the needle 6 is provided in the string feeding place by the needle 6.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to cut flowers, green onions, etc.
This invention relates to a general-purpose binding machine for binding soft and long vegetables such as asparagus and other objects to be bound.

0002

[Prior Art] Conventionally, as shown in Japanese Utility Model Application No. 2-45905, the above-mentioned tying machines have conventionally been configured to use hemp string or jute string as the tying string, and are used for agricultural purposes. It is often used as a stem culm binding device for binders, combines, etc. This binding device has a structure in which a string brake is provided in the middle of the string that is unwound from the winding string storage section by a needle, and which elastically presses a pair of plate members into contact with each other. However, when using hemp string or jute string as described above to bind cut flowers, green onions, asparagus, and other soft and long vegetables, increasing the binding force may damage the tied items; As a result, the objects to be bound may become loose during subsequent handling, making it practically unusable, and rubber bands have been used as a method of bundling several objects at a time as described above. . Therefore, it is conceivable to bind the rubber strings using a conventionally structured binding device, but in this case, the following problems occur.

0003

[Problems to be Solved by the Invention] In the above conventional structure, the pressing force of the string brake prevents the string from being excessively let out due to the inertial force of the string due to high-speed tying operation. However, in this structure, the clamping force of the string always acts, so if you use this structure to bind with rubber string, the frictional resistance of the rubber material is large, so the above-mentioned problem will occur. The string brake does not allow the string to be smoothly fed out due to the strong frictional force, and the string becomes under extreme tension during the tying operation, making it impossible to perform the tying operation. The present invention makes effective use of the characteristics of rubber cords, maintains an appropriate tension force during the binding operation, and is able to bundle objects with an appropriate tension force, and also enables smooth binding by appropriate string feeding timing. The object of the present invention is to provide a general-purpose binding machine capable of performing a binding operation.

0004

[Means for Solving the Problems] A characteristic feature of the present invention is to provide a Knotterbill-type knotting mechanism for knotting a binding rubber string supplied from a winding storage section by a needle that is driven and oscillated within a predetermined range; Provided between the winding storage section and the needle, resistance is provided to the unwinding of the rubber string when the needle is in operation of supplying the string to the knotting mechanism;
The present invention is characterized in that it is provided with a string letting-out resistance means that allows the rubber string to be let out when the needle is retracted to the standby position.

[0005]

[Operation] When the rubber string is fed by the needle toward the knotting mechanism, resistance is applied to the unwinding of the rubber string, so due to the frictional resistance, the rubber string is hardly let out, and the knotting mechanism The rubber cord portion that is activated maintains the initially set appropriate tension, so that objects to be bound can be bundled with appropriate tension. Furthermore, when the tying operation is completed and the needle retires to the standby position, the newly supplied rubber string is held in the tying mechanism, so that the string portion tends to stretch as the needle retires. However, since the string is allowed to be let out at this time, it is possible to maintain almost the same tension as during the previous binding operation. At this time, since the knotting operation is not performed, the binding tension of the objects to be bound is not adversely affected.

[0006]

[Effects of the Invention] Therefore, it is possible to provide a device that can quickly and mechanically bind soft objects such as long vegetables and cut flowers using rubber strings, so that the bundle is always in an appropriate state of tension. This makes it possible to bind objects to be bound, and even with rubber materials that are easily expandable and have a large friction coefficient, a good binding operation can be maintained.

[0007]

[Example] Hereinafter, an example will be explained based on the drawings. Figure 1
- Fig. 4 shows a general-purpose binding machine that uses rubber strings to bind objects a such as cut flowers, green onions, and soft and long vegetables such as asparagus. This binding machine is equipped with an electric motor 2 as a drive source and a knotting mechanism 3 inside a box body 1, and a string storage part 5 in which a rubber cord for binding 4 is wound and stored on the outside upper part of the box body 1. ,
It is equipped with a needle 6 that supplies the rubber cord 4 from the winding cord storage section 5 toward the knotting mechanism 3, and the object to be bound a is artificially placed along the upper workbench 7 of the box body 1. It is configured to supply and perform binding operations.

As shown in FIG. 4, a pulley 9 provided on the output shaft 8 of the electric motor 2 and a pulley 13 provided on a relay shaft 12 supported by a bearing member 10 erected from the bottom of the box body 1. A transmission belt 14 is stretched over the relay shaft 12, and a gear 15 provided on the relay shaft 12 and a large diameter gear 17 fitted on the driven shaft 16 so as to freely rotate are engaged with each other. A one-turn clutch mechanism 18 is interposed between the two. A crank mechanism 19 for driving the needle 6 is provided at one end of this driven shaft 16, and is interlocked and connected to the drive shaft 21 of the knotting mechanism 3 via a bevel gear mechanism 20 provided at the other end, so that the driven shaft 16 is branched. It is transmitted. As shown in FIG. 5, the one-turn clutch mechanism 18 is
A pawl clutch 22 is provided between the boss portion of the large-diameter gear 17 and the driven shaft 16, and a pawl clutch 22 is provided between the driven side meshing portion 22a and the driving side meshing portion 22b of the pawl clutch 22 from above in the shaft radial direction. The locking plate 23 is inserted inward while being pressed and biased to set the clutch in the disengaged state. The clutch is configured to be set to the engaged state by swinging the clutch in the direction away from the clutch. After engaging the clutch, the electromagnetic solenoid 25 is immediately turned off and the driven shaft 16 rotates once, causing the inclined cam surface 25 formed on the outer peripheral surface of the driven side meshing portion 22a to
The locking plate 23 engages along the driven side meshing portion 2.
The clutch 2a is configured to gradually slide toward the clutch release side and rotate only one rotation. As shown in FIG. 22, the electromagnetic solenoid 25 is configured to be activated only for a short period of time by activation of either a foot switch SW1 or a hand switch SW2 disposed at the feet of the operator. A changeover switch SW3 is provided which can be freely switched between a state in which the foot switch SW1 is used and a state in which the hand switch SW2 is used. The hand switch SW2 causes the actuating piece 27 to protrude upward from the work table 7 at the upper side of the knotting mechanism 3 at the passing position when the objects to be bound a are placed and fed, and is connected to the objects to be bound a to be fed. It is configured to automatically enter and operate upon contact.

The needle 6 is provided to be exposed upward from the workbench 7, and is pivotally supported around the horizontal axis X1 by a needle support case 28 that projects upward from the workbench 7. . That is, as shown in FIG. 1, a boss portion 30 is fitted around a rotating shaft 29 that is rotatably supported by a needle support case 28, and is bent into a dogleg shape. A support arm 31 is extended, and a needle 6 is connected to the tip of the support arm 31. As shown in FIG. 6, the drive arm 32 attached to the rotating shaft 29 inside the needle support case 28 and the crank mechanism 19 are interlocked and connected via a push/pull rod 33, so that the crank mechanism 19, the drive arm 32, that is, the needle 6, is swing-driven over a predetermined range to supply the rubber string 4 to the knotting mechanism 3. Also, needle 6
is biased to return to the upper standby position by a spring 34 disposed inside the needle support case 28, and when the one-rotation clutch mechanism 18 is in the disengaged state, the elastic force of the elastic string 4 that stretches allows it to return to the predetermined standby position. The structure is such that it does not stop at an unstable position where it is displaced downward. As shown in FIGS. 1 to 3 and 9, the cord storage section 5 includes a support member 3 extending from the needle support case 28.
5 rotatably supports the string storage roll 36, and is provided with a slack-removal rod 37 that acts on the feeding string, and a pair of string guide rollers 39, 40 is installed. After the feeding string is wound once around a guide roller 40 located on the lower side of the string supply, it is fed to the needle 6, and this guiding roller 40 is pressed by a spring 41 whose urging force can be adjusted freely, and the feeding string is fed out. The condition can be adjusted. The rubber cord 4 is wound around the guide roller 40 so that the amount of wrapping increases as the needle 6 swings toward the knotting mechanism 3, and decreases as the needle 6 retires to the standby position. There is. In this way, a string-feeding resistance means is constructed that provides resistance to the string being drawn out during the supply operation of the needle 6 and allows the string to be drawn out during the retraction operation.

[0010] The binding rubber string 4 is as shown in FIG.
Linear irregularities 4b connected in the longitudinal direction of the cord are formed on the surface of the band-like rubber plate main body 4a to improve slippage in the longitudinal direction and to obtain an appropriate tension when the objects to be bound a are bundled. It is structured like this.

[0011] The knotting mechanism 3 is provided in a knotterbill type, and holds one end of the rubber string 4 in a pinched manner, and also holds the new string portion supplied by the needle 6 and the held string portion in a state that they overlap each other. A string holder 42 to be set,
The knot holder 42 and the knot bill 43 are arranged so that their respective rotary drive axes are parallel to each other, and are attached to the support bracket. 44, and a pair of timing gears 45, 46 for driving these are attached to the nodule drive shaft 21. And Node Building 43
At a position near the upper side, when the knot building 43 is in operation for winding the string, the rubber string portion 4 is held by the string holder 42.
A string guide member 47 for locking and holding each of the string portions 4c and 4d at a predetermined applied position when forming a knot by winding the rubber string portion 4d after wrapping the object to be tied. In addition, a moving means A is provided for moving the string guide member 47 in a direction substantially perpendicular to the direction in which the needle 6 supplies the string after the knotting bill 43 finishes winding the string. To be more specific, as shown in FIGS. 2, 7, and 10, the string guide member 47 is provided in a plate shape that covers the upper part of the knot building 43, and the string guide member 47 is provided in a plate shape to cover the upper part of the knot building 43, and the string guide member 47 is provided in the shape of a plate to cover the upper part of the knot building 43. A locking recess 48 into which the swinging support arm 4 is inserted and engaged is formed.
9, it is pivotally supported on the support bracket 44 so as to be swingable around an axis along the axial direction of the knot drive shaft 21. The swinging support arm 49 is urged to swing toward the working position by the spring 50, and the cam follower 52 abuts and engages with the cam 51 provided on the knot drive shaft 21, thereby changing the working position and the joint building. The moving means A is configured to swing between an upper position and a retracted position. In this manner, the cord guide member 47 switches to the retracted position while being wound around the knot bill 43, so that the cord comes off from the knot bill 43, and the knot operation ends. The rotation axis 29 of the needle 6 is arranged above the center of the rotation axis of the knot building 43 and the rotation axis of the string holder 42, so that the rubber string 4
3 and the string holder 42 at a substantially uniform level, and the needle support case 28 is provided in an inclined position to provide a large nodule space.

A string guide member 53 is provided in the vicinity of the string guide member 47 and can be freely switched between a locking position in which the entrance portion of the locking recess 48 is closed and a position in which the entrance portion is opened. A posture switching means B is provided for switching the string gathering member 53 to a retaining posture during the string winding operation. In other words, as shown in FIGS. 7 and 8,
The string gathering member 53 has an axis X that is perpendicular to the axis of the knot drive shaft 21.
It is pivotally supported on a support bracket 44 so as to be able to swing freely around 2, and is swingingly biased toward the open position by a spring 54, and a continuous cam follower 55 comes into contact with a cam 56 provided on the node drive shaft 21. It is configured to perform a switching oscillating motion.

As shown in FIGS. 19 and 20, a rubber string 4, one end of which is held by the string holder 42 when the needle 6 is retracted, is placed between the knot building 43 and the string holder 42. A string guide plate 57 is provided for regulating the standby position, and the string guide plate 57 is brought close to the outer end rotation locus of a string cutting cutter 58 provided in the string holder 42 with a minute interval smaller than the thickness of the rubber string. It is placed in the state.

Next, the binding operation procedure will be explained. From a standby state in which the end of the rubber string 4 is held between the string holders 42 and the needle 6 is at the upper standby position, the object to be bound a is placed on the workbench 7 and fed along the lower side of the string. When the object to be bound a reaches the vicinity of the binding action point, the object to be bound a comes into contact with the operating piece 27 of the hand switch SW2, the one-turn clutch mechanism 18 is activated, and the driven shaft 16 is driven one rotation. . Then, as shown in FIG. 12, the needle 6 is actuated to feed the rubber string 4 toward the knotting mechanism 3. At this time, the string wound around the string guide roller 40 is further wound in the winding direction as the needle 6 operates, and the string is almost stopped from being fed out. Then, before the needle 6 reaches the maximum plunge position, the string gathering member 53 first switches from the open position to the retaining position. Immediately thereafter, the knotting bill 43 is driven to rotate and starts knotting by winding together the string portion 4c held by the string holder 42 and the string portion 4d supplied by the needle 6 (FIG. 13). Note that at this time, the string guide member 47 is set at the operating position.

Thereafter, when the needle 6 reaches the maximum plunge position, the string holder 42 rotates from that point on, aligning the string portions 4c and 4d, and acting to wind them up by the knot bill 43 (FIG. 14). , Figure 15). When the winding operation of the knot building 43 is completed, the string gathering member 53 switches to the open position, and the cutting cutter 58 provided in the string holder 42 approaches the string guide plate 57 and cuts the string portion. Thereafter, the string guide member 47 swings laterally from the operating position to remove the string wrapped around the knot building 43, and the knotting operation is completed (FIGS. 16 to 18). At this time, near the end of the winding operation of the knotted bill 43, the string holder 42 releases the held string portion 4c, and newly holds the supplied string portion 4d by the needle 6, and then , the supply string portion 4d is cut by the cutting cutter 58. As mentioned above, since the rubber string 4 is hardly let out from the needle 6 side, the rubber string 4 is in an elongated state during the knotting operation, and when the string is cut, it is first held by the string holder 42. The tied string portion 4c is in an extremely stretched state due to its winding action, so when the pinching state is released, it comes off from the loop portion formed by the knot building 43, and the knot of the binding string is tied. However, it becomes a so-called one-sided knot state (see FIG. 21). As a result, when removing the rubber string 4 from the bound object a, if you pull the one string part,
Because there is only one string passing through the loop of the knot, and because of the stretching action of the rubber string and the sliding action of the unevenness 4b formed on the rubber string, it can be easily removed, and after it comes out of the loop, The remaining loops act to expand, making it easy to release the tied state. Moreover, since the knot building 43 and the string holder 42 are provided so that their respective driving axes are parallel to each other, when the string holder 42 performs the winding operation,
The posture of both the string portions positioned between the knot building 43 and the rotating direction of the string holder 42 are substantially parallel,
There is no possibility that the clamping spring 42a will be wound around the disposed portion of the clamping spring 42a and the knotting operation will be inhibited (FIG. 19). Moreover, by forming the streak-like unevenness 4b on the surface of the rubber string 4, it can be appropriately slid in the longitudinal direction during the clamping action of the string holder 42, and
Appropriate clamping force can be maintained, and the holding action can be performed smoothly. Then, when the needle retires to the standby position, the guide roller 40 acts in a direction to loosen the winding of the string, and the rubber string 4 is paid out from the storage portion 5 as the needle is retracted.

[Another embodiment] The resistance means for letting out the string is
Instead of winding the rubber string 4 around the guide roller 40,
It may be configured such that when the needle 6 is in the supply operation, the string is prevented from being drawn out by a clamping action, and when the needle 6 is in the retracting operation, the clamping action is stopped and the string is allowed to be drawn out.

Although reference numerals are written in the claims to facilitate comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Figure 1] Overall side view of general-purpose binding machine

[Figure 2] Vertical side view of a general-purpose binding machine

[Figure 3] Vertical side view of general-purpose binding machine

[Figure 4] Cross-sectional plan view of general-purpose binding machine

[Fig. 5] Side view of the one-turn clutch mechanism installation part

[Figure 6] Side view of needle drive system

[Fig. 7] Side view of the drive cam mechanism of the string gathering member

[Fig. 8] Diagram explaining the action of the string gathering member

[Figure 9] Side view of the string feeding section

[Fig. 10] Perspective view of the string guide member

[Figure 11] Cross-sectional view of rubber string

[Figure 12] Illustration of bundling operation

[Figure 13] Illustration of bundling operation

[Figure 14] Explanatory diagram of bundling operation

[Figure 15] Illustration of bundling operation

[Figure 16] Explanatory diagram of bundling operation

[Figure 17] Illustration of bundling operation

[Figure 18] Illustration of bundling operation

[Figure 19] Side view of the string knotting mechanism

[Figure 20] Explanatory diagram of the action of the string guide plate

[Figure 21] Perspective view of objects to be bound after binding

[Figure 22] Electrical circuit diagram

[Explanation of symbols]

3. Nodulation mechanism 4 Rubber string for binding 5. Winding storage section 6 Needle

Claims (1)

[Claims] Claim 1: A needle (
A knotterbill-type tying mechanism (3) is provided for tying the binding rubber string (4) supplied from the winding storage section (5) by means of the winding storage section (5) and the needle (6).
6), the knotting mechanism (3) by the needle (6)
) A string that provides resistance to the elastic string (4) being fed out when the string is supplied toward the needle (6), and allows the rubber string (4) to be fed out when the needle (6) is retracted to the standby position. A general-purpose binding machine equipped with a feeding resistance means.