JPH0638410U - Bundling thread tension adjusting device for seeding tape making machine - Google Patents

Abstract

(57) [Summary] [Purpose] The binding thread guide is integrated with the braking arm and is freely rotatably attached to the guide mounting plate. The binding thread guide also serves to detect the binding thread tension, and the binding thread tension is weak during tape binding. If this happens, the rotation speed of the bobbin and the guide mounting plate are brought closer to increase the tension, and if the tension is increased, the bobbin is allowed to rotate freely and the tension is weakened, so that fluctuations in the tension are absorbed and appropriate binding thread tension Always keep it. [Structure] A braking plate 90 for pushing the side surface of the bobbin 31 is attached to the guide mounting plate 36, and a binding yarn guide / braking arm portion 85 in which the binding yarn guide 35 and the braking arm 84 are integrated is rotatably mounted on the guide mounting plate 36. The spring arm 84 urges the braking arm to rotate in a direction to increase the tension of the binding yarn, and the binding plate guide / braking arm portion is rotated to strongly press the braking plate when the tension of the binding yarn decreases. The rotation of the bobbin is decelerated to increase the tension, and when the tension of the binding yarn increases, the suppression of the rotation of the bobbin is relaxed to accelerate the rotation and weaken the tension.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seeding tape making machine for wrapping a certain number of seeds of an agricultural product in a tape at regular intervals, and in particular, for supplementing the strength of the tape and for tying the binding yarn to entangle the tape to prevent movement of the enclosed seeds. The present invention relates to a binding thread tension adjusting device for a seeding tape making machine that automatically controls tension.

[0002]

[Prior art]

 In general, the sowing tape is a tape that carries seeds out of a hopper that stores the seeds to be supplied and decomposes them in soil such as an aqueous solution. It consists of a part that is wrapped around and reinforced and fixed by tying a binding thread from the outside. FIG. 7 shows a basic conventional example of a device for tying a binding yarn around a tape. In FIG. 7, seeds 60 arranged on the surface of the tape 10 at a constant number and at regular intervals are wound on the tape when passing through the holes of the guide gutter holding plate 50 and bound by the binding yarns 12 and 32 to form the seeding tape 30. To be done.

As described above, in order to supplement the strength of the tape and prevent the movement of the encapsulated seeds, two binding yarns are usually used and entwined with the tape while crossing each other. As the number of binding yarns increases, the chances of cutting the binding yarn tend to increase. In such a case, if a tape is created with the binding thread cut, the tape condition will be significantly reduced and the product will be defective. If the discovery of this binding yarn cutting is delayed, the device is operating at high speed, which causes the problem of producing a large number of defective products. Therefore, recently, a device for detecting the cutting of the binding yarn is added, and when the cutting is detected, the device is immediately stopped.

FIG. 8 is a perspective view showing an example of a seeding tape making machine having such a binding yarn cutting detection device. FIG. 9 is a vertical cross-sectional view of the right half of the conventional example of FIG. 8 taken along a plane including the center line of the rotating portion. In the conventional example shown in FIGS. 8 and 9, the base 2 is fixed to the base mounting surface 1 and the seeding tape guide pipe 3 is fixed to the base 2. A rotary cylinder 22 is rotatably attached to the seeding tape guide pipe 3 via ball bearings 24, 24, and a rotary cylinder 42 is rotatably attached via ball bearings 44, 44. One end of each of these rotary cylinders is in the form of a belt wheel, on which belts 21 and 41 are hung. The belts 21 and 41 are driven by a motor (not shown) located below the base mounting surface 1, and the driving direction is the same as that when the motor 55 in FIG. The rotary cylinders 22 and 42 rotate in opposite directions. A disk-shaped guide mounting plate 16 is fixed to the rotary cylinder 22, and a disk-shaped guide mounting plate 36 is fixed to the rotary cylinder 42. Therefore, the guide mounting plate 16 and the guide mounting plate 36 are adapted to rotate in opposite directions.

The guide mounting plate 36 is provided with a guide 33 for smoothly feeding out the binding thread 32 from the bobbin 31, and a guide 34 for smoothly pulling out the seeding tape 10 from the seeding tape penetrating pipe 3. Immediately next to the attachment position of, the root of the binding yarn cutting detection pin 35 is rotatably attached. A limit switch 37 is fixed to the switch mounting plate 40 fixed to the base mounting surface so that the movable portion 39 is located at a position facing the outside of the peripheral portion of the guide mounting plate 36. Similarly, with respect to the guide mounting plate 16 attached to the rotary cylinder 22, a guide 14 for smoothly drawing the seeding tape 10 into the seeding tape penetrating pipe 3, a binding yarn cutting detection pin 15, and a limit switch. 17 is attached.

When using such a device, first, the bobbin 11 on which the binding yarn 12 is wound is placed on the bobbin attaching portion 23, and the bobbin 31 on which the binding yarn 32 is wound is placed on the bobbin attaching portion, respectively. Mounting. Next, the seeding tape 10 in which a certain number of seeds are arranged at a predetermined interval by another device not shown in advance is arranged in the order of the loop of the guide 14, the tape insertion portion 4, the seeding tape penetrating pipe 3, and the loop of the guide 34. To penetrate. Further, the binding yarn 12 is unwound from the bobbin 11 and is inserted through the two loops of the guide 13 and the loop of the guide 14 from the entrance of the tape insertion portion 4. The binding yarn 32 is unwound from the bobbin 31, passes through the two loops of the guide 33 and the loop of the guide 34, and is attached to the tape 10.

Next, in this state, the guide mounting plates 16 and 36 are rotated in opposite directions while running the tape 10 in the direction shown by the arrow in FIG. 7, and the binding yarns 12 and 32 are entangled and seeded. The tape 10 is bundled at a high speed, and the bundled seeding tape is delivered as a finished product. At this time, the binding thread cutting detection pin 15 rotates at a high speed together with the guide mounting plate 16 and the binding thread cutting detection pin 35 rotates at a high speed together with the guide mounting plate 36, so that the tip of the binding thread cutting detection pin 35 tends to move away from the center of rotation by centrifugal force. The movable part of the pin is located inside the path for feeding the binding yarn and is restrained by constantly sliding and contacting the binding yarn 12 or 32.

If any of these binding yarns is cut for some reason, there is no force to prevent the tip of the binding yarn cutting detection pin from going outward due to centrifugal force. The tip of the pin rotates while protruding outward, hits the moving part of the corresponding limit switch, and the moving part pushes the switch to activate it. By this operation, an alarm device (not shown) or a display device operates to notify the operator of the breakage of the binding yarn.

[0009]

[Problems to be solved by the device]

 As described above, the conventional seeding tape making machine has recently added the binding yarn cutting detection device to the device for entanglement of the binding yarn with the tape. However, it is possible to significantly improve the production efficiency by removing the excessive tension of the binding thread that causes the cutting, before detecting the binding thread cutting. In addition, when the tension of the binding yarn drops below a certain level, the product loses its shape and loses the function of wrapping and holding a certain number of seeds on the tape at regular intervals, increasing the number of defective products and increasing the production efficiency. Is significantly reduced.

However, in the conventional device, as shown in FIG. 9, the tension of the binding yarn causes the guide mounting plate 16 (36) fixed to the rotating cylinder 22 (42) and the bobbin 11 (31) to be completely wound. The contact rings 28 (48) made of materials with appropriate friction such as two felts that are in contact with each other are not in a free state, but their mutual movements are gently restrained. The average tension is fixedly determined. Therefore, it does not have a function of automatically adjusting even if the tension of the binding yarn changes for some reason during the operation of the binding process.

On the other hand, the tension of the binding yarn during the binding process is different from the difference in the diameter of the binding yarn wound on the bobbin between the winding start, the winding end and the winding end, and the difference in the binding yarn feeding speed and , It changes momentarily due to the difference in inertia caused by rotation depending on the size of the remaining amount of the binding thread wound on the bobbin. Therefore, it is desirable to constantly adjust the tension of the binding yarn during processing so as to keep the tension at an optimum value, following such changes.

An object of the present invention is to solve such a problem and to adjust the tension automatically in response to the change in the tension of the binding yarn during the binding processing, thereby significantly reducing the product defects in the high-speed processing. (EN) It is possible to provide a binding thread tension adjusting device for a seeding tape making machine that can be significantly reduced.

[0013]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the binding thread tension adjusting device of the seeding tape making machine of the present invention feeds the binding thread 32 (12) from the rotating bobbin 31 (11) and advances the seeding tape 10 to be bound. , A guide that rotates around the seeding tape 10 A seeding tape making machine that binds the binding thread 32 (12) with the tape 10 through a binding thread guide 35 (15) attached to a mounting plate 36 (16) to bind the bobbin. 31. Install a braking plate 90 (or an equivalent braking plate (not shown)) for pressing the side surface of 1 (11) to control the rotation speed of the bobbin on the surface of the guide mounting plate 36 (16) that faces the bobbin side surface. The binding yarn guide 35 (15) is integrated with a braking arm 84 (or an equivalent braking arm (not shown)) provided to suppress the rotation of the bobbin, and is integrated into a single binding. A guide / braking arm portion 85 (or an equivalent binding yarn guide / braking arm portion (not shown)) is rotatably attached to the guide mounting plate 36 (16) about the axis of the supporting portion, and the binding yarn guide / braking arm portion is attached. Around the portion 85 (or equivalent bundling yarn guide / braking arm part (not shown)), the bundling yarn guide 35 (15) is biased to rotate in a direction to increase the tension of the binding yarn 32 (12) during bundling. A spring 89 (or an equivalent spring, not shown) is provided, and the binding yarn 32 (or equivalent binding yarn guide / braking arm portion, not shown) is rotated to bind the binding yarn 32 ( When the tension of 12) decreases, the braking arm 84 (or an equivalent braking arm (not shown)) applies it through the braking plate 90 (or an equivalent braking plate (not shown)) to the side surface of the bobbin 31 (11). Decelerating the rotation strengthened and configured to tension the tie yarn 32 (12) in the binding accelerates its rotation by weakening the pressing force upon increased.

[0014]

【Example】

 Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially omitted perspective view showing an example of a seeding tape making machine using one embodiment of the present invention. FIG. 2 is a front view showing a set of main parts viewed from the direction of arrow A in the drawing of the embodiment of FIG. FIG. 3 is a plan view of the portion of FIG. 2 of the embodiment of FIG. 4 is a right side view of the portion of FIG. 2 of the embodiment of FIG.

As shown in FIGS. 1 to 4, the binding thread tension adjusting device of the seeding tape making machine according to the present invention includes a guide mounting plate 86 corresponding to the conventional guide mounting plate 36 shown in FIG. First, the support block 87 is fixed, and the binding yarn guide / braking arm portion 85 is freely rotatable on the support block 87 about the axis of the supported portion thereof. The cutting detection pin 35 is rotatably supported at its root portion in parallel with the rotation surface of the guide mounting plate 86. In addition, 34 is equivalent to 34 of FIG. 8, and 93 is a balance weight for smoothly rotating the guide mounting plate 86.

In FIG. 1, the seeding tape guide pipe 3 is fixed to the base 2, and the seeding tape guide pipe 3 is rotatably supported by rotary cylinders 22 and 42 via ball bearings (not shown). Belts 21 and 41 are respectively attached to one ends of these rotary cylinders, which are driven by a motor (not shown) and rotate in mutually opposite directions. A disc-shaped guide mounting plate 86 is fixed to the rotating cylinder 42, and another guide mounting plate (not shown) corresponding to the guide mounting plate 86 is mounted to the rotary cylinder 22. Therefore, these two guide mounting plates rotate in opposite directions. In addition, the base 2, the seeding tape guide pipe 3, the tape 10, the bobbins 11, 31, the binding yarns 12, 32, the limit switches 17, 37, the switch mounting plates 20, 40, the belts 21, 41, the rotary cylinders 22, 42. All of the bundled seeding tapes 30 are the same as those shown by the same reference numerals in FIG. 8, and their structures and operations are the same, so detailed description thereof will be omitted.

As shown in FIGS. 2 to 4, the binding yarn guide / braking arm portion 85 is composed of two portions, a binding yarn guide 83 and a braking arm 84, and is formed by a single wire. The central portion is supported by being inserted into a groove 87a provided in a support block 87 so as to be freely rotatable around the axis of the wire. The binding thread guide 83 projects outward from its supporting portion, and two loops are formed in parallel with the axis of the bobbin 31 like the conventional binding thread guide. The braking arm 84 is composed of a portion that is bent at a steep angle on the opposite side of the binding yarn guide 83 with respect to the portion where the binding yarn guide / braking arm portion 85 is supported. The center of rotation is in another groove 87b provided in the support block 87, and its front end portion is further bent at a substantially right angle to penetrate through a hole 88 provided in the guide mounting plate 86 from the front to the back. . Then, a spring 89 is urged so that this tip portion projects toward the bobbin 31. The screws 82, 82 for fixing the support block 87 to the guide mounting plate 86 also have a function of suppressing the one supporting portion of the binding yarn guide / braking arm portion 85 from jumping out of the groove 87a. The other one also has a role of supporting the binding yarn cut detection pin so as to freely rotate.

The braking plate 90 is made of a thin plate, and its root is fixed to the surface of the guide mounting plate 86 on the bobbin 31 side with screws 92, 92. A contact piece 91 made of a suitable friction material such as felt is attached to the tip of the bobbin 31. The tip of the braking arm 84 is in contact with the opposite side of the portion of the braking plate 90 where the contact piece 91 is stretched (the side of the guide mounting plate 86) during normal bundling. Therefore, when the tip of the braking arm 84 strongly pushes the braking plate 90 by the rotation of the binding yarn guide 83, the contact piece 91 strongly pushes the side surface of the bobbin 31 to increase friction, and the tip of the braking arm 84 is restrained. When the moving plate 90 is weakly pressed, the contact piece 91 weakly presses the side surface of the bobbin 31 to reduce friction.

Next, the relationship between the tension of the binding yarn during binding of the seeding tape and the friction between the guide mounting plate and the bobbin for feeding the binding yarn will be described. Considering, for example, the tension of the binding yarn 32, the guide attachment plate 86 is integrated with the rotary cylinder 42 and is rotated around the seeding tape guide cylinder 3. The bobbin 31 that delivers the binding yarn 32 is rotatably supported by the seeding tape guide cylinder 3 via a ball bearing (not shown), and rotates in the same direction as the guide mounting plate 86. However, in this case, the rotation of the bobbin 31 is always faster than the rotation of the guide mounting plate 86. This is because it is necessary to pay out the binding yarn to be entangled around the running seeding tape. Therefore, if the bobbin 31 is completely rotated to allow the binding yarn to be let out, the tension of the binding yarn 32 becomes the weakest. If the rotation speed of the bobbin 31 is made to approach the rotation speed of the guide mounting plate 86 by some method, the tension of the binding yarn 32 becomes strong.

5 and 6 are explanatory views showing the operation of the binding yarn guide / braking arm portion 85 of the embodiment of FIG. 1 viewed from the direction of arrow B in FIG. FIG. 5 shows the state of the binding yarn guide / braking arm portion 85 when the tension of the binding yarn 32 is the weakest. FIG. 6 shows a state of the binding thread guide / braking arm portion 85 when the tension of the binding thread 32 becomes abnormally high. As shown in FIGS. 5 and 6, the binding yarn guide / braking arm portion 85 is rotatably supported in the groove 87a of the support block at its central portion, and the binding yarn guide 83 seen from the direction of arrow B in FIG. The direction of the line connecting the two wheels of the brake arm 84 and the direction of the main part of the braking arm 84 are substantially at right angles. Therefore, when the binding yarn guide 83 rotates clockwise from the state of FIG. 5, the braking arm 84 also rotates clockwise and the tip of the braking arm weakens the force pushing the braking plate 90. Further, if the binding yarn guide 83 rotates counterclockwise from the state of FIG. 6, the braking arm 84 also rotates counterclockwise and the tip of the braking arm strengthens the force pushing the braking plate 90.

In the state where the binding yarn tension is the lowest (the state shown in FIG. 5), the tip of the braking arm 84 pushes the braking plate most strongly to increase the friction with respect to the bobbin 31, thereby rotating the bobbin 31 and the guide mounting plate 86. It works to increase the tension of the binding yarn by making the speed of the yarn closer. As a result, when the binding thread tension increases, the binding thread guide 83 turns clockwise, and the braking arm 84 also turns clockwise to weaken the force with which the tip of the binding arm 90 pushes the braking plate 90, thereby rotating the bobbin 31. It works to reduce the tension of the binding yarn by weakening the extent to which the guide mounting plate 86 is pulled by the rotation and making it more free.

When the binding thread tension becomes abnormally high (the state shown in FIG. 6), the binding thread 32 tries to pass the shortest distance, and the binding thread guide 83 is rotated clockwise in the figure to move the braking arm 84. Since the tip end moves backward and does not press the braking plate 90, and the braking does not work for the rotation of the bobbin 31, the binding yarn tension immediately decreases. This makes it possible to prevent the binding yarn from being cut. When the binding thread tension is weakened, the binding thread guide 83 rotates counterclockwise in the figure, and the tip of the braking arm 84 pushes the braking plate 90 to increase the friction against the bobbin 31, thereby increasing the binding thread tension. . In this way, the tension of the binding thread during binding is a factor that causes the tension of the binding thread generated during binding to fluctuate while the binding thread guide / braking arm portion 85 assumes the posture between FIGS. 5 and 6. It absorbs and constantly works to maintain the optimum tension. It should be noted that the cutting of the binding thread due to normal abnormal tension can be prevented by the operation of the binding thread guide / braking arm portion 85, but the binding thread is not fed out from the bobbin, or the bobbin is stopped due to other causes. In the case of a yarn breakage, a binding yarn breakage detection pin 35 and a limit switch 39 according to the prior art are arranged.

Although the portion related to the tension of the binding yarn 32 has been described above, similarly for the binding yarn 12, a bobbin 11 attached to a guide mounting plate (not shown) and a binding yarn guide corresponding to the binding yarn 12. The same operation is performed by the dual braking arm section and the braking plate, and the same result is obtained. Regarding the shape and structure of the binding yarn guide / braking arm portion 85 and the support block 87 and the method of attaching to the guide mounting plate 86, the shape and structure of the control plate 90 and the method of attaching to the guide mounting plate 86, etc. Although various other than those shown in FIGS. 1 to 4 are conceivable, any of them may be used as long as they are in accordance with the gist of the present invention.

[0024]

[Effect of device]

 As described in detail above, according to the present invention, the binding thread guide that guides the binding thread from the bobbin is integrated with the braking arm that controls the rotation speed of the bobbin, and the binding thread guide is freely rotatable. When the binding thread tension is weakened during binding of the seeding tape, the bobbin rotation speed is made closer to the rotation speed of the guide mounting plate to increase the tension. When the tension becomes strong, the bobbin rotation is restrained less and the tension is weakened, so that the influence of the fluctuation of the binding thread tension that occurs during binding of the seeding tape can be absorbed and the appropriate tension can always be maintained. There is an effect. Therefore, by using this example, it is possible to produce a uniform and high-quality seeding tape at high speed, and it is possible to prevent the usual binding yarn breakage and improve the product yield. You can expect an effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a seeding tape making machine using an embodiment of the present invention.

FIG. 2 is a front view of a main part of the embodiment of FIG. 1 viewed from a direction of an arrow A in the figure.

FIG. 3 is a plan view of the portion of FIG. 2 of the embodiment of FIG.

FIG. 4 is a right side view of the portion of FIG. 2 of the embodiment of FIG.

FIG. 5 is an explanatory view showing the operation of the binding yarn guide / braking arm portion of the embodiment of FIG. 1 (when the tension of the binding yarn is weak).

FIG. 6 is an explanatory view showing the operation of the binding yarn guide / braking arm portion of the embodiment of FIG. 1 (when the tension of the binding yarn is strong).

FIG. 7 is a perspective explanatory view showing a basic conventional example of a seeding tape making machine.

FIG. 8 is a perspective view showing a conventional example of a seeding tape making machine with a binding yarn cutting detection device.

9 is a vertical cross-sectional view of the right half of the conventional example of FIG.

[Explanation of symbols]

 2 base 3 seeding tape guide pipe 4 tape insertion part 10 tape 11,31 bobbin 12,32 binding thread 13,14,33,34 guide 15,35 binding thread cutting detection pin 16,36,86 guide mounting plate 17,37 Limit switch 19,39 Switch movable part 20,40 Switch mounting plate 21,41 Belt 22,42 Rotating cylinder 28,48 Contact ring 30 Bound seeding tape 50 Guide gutter holding plate 53,54 Pulley 55 Motor 60 Seed 83 Bundling Thread guide 84 Braking arm 85 Bundling thread guide and braking arm section 87 Support block 90 Braking plate 91 Contact piece

Claims (1)

[Scope of utility model registration request] 1. A binding thread is fed from a rotating bobbin,
In the seeding tape making machine, which advances the seeding tape to be bound and binds the binding thread through the binding thread guide attached to a guide mounting plate rotating around the seeding tape, the bobbin A braking plate for controlling the rotation speed of the bobbin by pressing the side surface of the bobbin is attached to a surface of the guide mounting plate that faces the bobbin side surface, and the binding yarn guide is a braking arm provided to suppress the rotation of the bobbin. And the integrated bundling yarn guide / braking arm part is attached to the guide mounting plate so as to be rotatable about the axis of the supporting part thereof, and near the bundling yarn guide / braking arm part during bundling. A spring for urging the binding thread guide to rotate in the direction of increasing the tension of the binding thread is provided, and the binding thread guide / braking arm section is rotated to bind the binding thread during binding. When the tension of the bundle thread decreases, the braking arm increases the pressing force applied to the side surface of the bobbin via the braking plate to decelerate the rotation, and when the tension of the binding thread increases during binding, the pressing force is weakened. A binding thread tension adjusting device for a seeding tape making machine, characterized in that the rotation is accelerated.