JP2002027965A - Leaf tobacco stringing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a machine sewing thread in a state of no occurrence of machine sewing thread wastes and save labor during the stringing of a bunch in a leaf tobacco stringing machine so as to string the leaf base parts of leaf tobacco using a single-thread annular sewing type sewing machine stringing device. SOLUTION: This leaf tobacco stringing machine is obtained by arranging a long machine sewing thread cutting means 30 having thread cutting blades 40 in a lateral edge and reciprocating in the vertical directions in a moving passage S of a machine sewing thread 10 so as to normally locate the tip thereof under a conveyor surface and protrude the tip upward from the conveyor surface during the cutting, in the leaf tobacco stringing machine designed to string the leaf base parts of the leaf tobacco using the single-thread annular sewing type sewing machine stringing device. Only one machine sewing thread 10c of three parallel threads (10a, 10b and 10c) comprising double entwinement of an annular thread is hooked with the thread cutting blades 40, pushed upward and cut during the lifting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leaf tobacco knitting machine, and more particularly, to a machine in which a large number of leaf tobaccos are placed side by side on a conveyor, and the leaf tobacco is moved using a single-thread annular sewing machine. And a leaf tobacco knitting machine.

[0002]

2. Description of the Related Art As shown in FIGS. 6a and 6b, a leaf tobacco knitting machine using a single-thread annular sewing machine is known (for example, Japanese Utility Model Publication No. 56-13496, Japanese Utility Model Publication No. No. 14160). This leaf knitting apparatus places leaf tobacco 2 (FIG. 6b) side by side on a conveyor 1,
While transporting the leaf tobacco by the conveyor 1, the leaf base of the leaf tobacco 2 is knitted by the leaf knitting needles 4 of the sewing machine 3. Usually, the guide belt 5 is stretched on the same rotating shaft 6 in parallel with the conveyor 1. The leaf tobacco 2 is arranged on the conveyor 1 and the guide belt 5 such that a leaf tip of the leaf abuts against the guide plate 7, a hanger (not shown) is placed thereon, and leaf tobacco is further arranged thereon. Is moved by the movement of the conveyor 1 and the guide belt 5, and during the transfer, the leaf knitting needle 4 is reciprocated in the vertical direction in the space S between the conveyor 1 and the guide belt 5, so that the base of the leaf tobacco is sewn with a sewing thread. Knit continuously with 10 The weaving length is usually about 1.8 m in series.

[0006] As shown in FIG. 6B, when the knitting for one series Ta1 is completed, an empty knitting part 10S of about 30 cm is formed between the next knitting Ta2 and the next knitting Ta2 starts. The empty knitting portion 10S is used for moving the sewing thread 10 (conveyor 1) downstream of the knitting portion.
11 provided in the space S) between the guide belt 5 and the
, Individual run (eg, Ta1, Ta2)
Is separated into After the separation, the individual runs are removed from the end of the conveyor 1 by an operator. In some cases, cutting of the sewing thread 10 at the empty knitting portion 10S is performed with scissors. The cut ends of the sewing thread 10 are fastened to both ends of the hanger.

[0004]

SUMMARY OF THE INVENTION In the case of knitting using a single thread annular stitch type sewing machine, the sewing thread 1 is used.
As shown in FIGS. 5a and 5b, the three parallel threads (10a, 10b, 10) formed by entanglement of the annular thread twice.
State c). On the other hand, an apparatus for cutting an empty knitted sewing thread in a conventional leaf tobacco knitting machine is shown in FIG.
As shown in FIG. 2B, the blade body 11 extending in the direction crossing the movement path of the sewing thread (the space S between the conveyor 1 and the guide belt 5) is turned from a vertical state to a horizontal state around the fulcrum 12. It is usual that the sewing machine 10 moves and cuts the sewing thread 10 when it becomes horizontal. For this purpose, in the case of this cutting device, all of the three parallel yarns are cut at one time, as indicated by the dashed line T in FIG. 5a. As a result, at each of the two cut-off ends, a single thread (a part 10X composed of a part of the sewing thread 10a and a part of the sewing thread 10b), a part of the sewing thread 10b and the sewing thread 10c
10Y), a total of two sewing thread wastes are generated. When such sewing thread lint 10X, 10Y is mixed into leaf tobacco, it greatly affects the quality of the product tobacco, and it is necessary to remove it. At present, the removal operation is performed manually by an operator. The fact is that it is a heavy work load. This inconvenience also occurs when the empty knitting portion 10S is cut with scissors.

The present invention has been made in view of the above circumstances, and in a leaf tobacco knitting machine in which the base of a leaf tobacco is knitted using a single-thread annular stitching sewing machine, the empty knitting portion is provided. It is an object of the present invention to provide a leaf tobacco knitting machine that enables a sewing thread to be cut in a state in which no sewing thread waste is generated at the time of cutting, thereby greatly reducing labor required for continuous knitting.

[0006]

A leaf tobacco knitting machine according to the present invention for solving the above-mentioned problems comprises a plurality of leaf tobaccos arranged side by side on a conveyor, and a single thread circular stitch sewing machine while moving the leaf tobacco. Using a device, in a leaf tobacco knitting machine in which the base of the leaf is knitted, the sewing thread cutting means reciprocating in the up and down direction on the movement path of the sewing thread downstream of the knitting part, the tip of which is always from the conveyor surface. Is also located below, is arranged so as to protrude above the conveyor surface at the time of cutting, and is provided with at least one thread cutting blade on a side edge of the sewing thread cutting means, At the time of cutting, the thread cutting blade cuts one sewing thread while pushing it upward.

[0007] In the leaf tobacco knitting machine according to the present invention, when cutting the sewing thread of the empty knitting portion formed after the knitting of a series, the sewing machine thread cutting means causes the leaf tobacco transport from the lower retreat position by the operation of an appropriate actuator. It protrudes substantially vertically above the conveyor transport surface. In the course of the ascent, only one of the three parallel yarns (10a, 10b, 10c), which is formed by two entanglements of the circular thread of the sewing machine, is located on the outside (for example, the portion of 10c) in FIG. As shown, it is hooked by the portion of the thread cutting blade provided on the side edge, and the thread cutting blade jumps upward in the hooked state. During the ascent, the hooked one sewing thread 10c is cut by the thread cutting blade.

After the cutting, the front and rear reams are separated by the operator, but only one of the three parallel yarns is cut and separated in a state where the loop is released, so that the sewing thread waste 10X as shown in FIG. , 10Y do not occur at the time of continuous separation. Therefore, the operation of removing lint, which is necessary in the conventional knitting operation, becomes unnecessary, and the continuous knitting operation is greatly labor-saving.

Preferably, the sewing thread cutting means reciprocates up and down along a direction slightly inclined (eg, about 1 to 2 degrees) from the vertical direction to the side of the moving direction of the sewing thread with respect to the vertical plane. And preferably,
Two or more thread cutting blades are provided on a side edge of the sewing thread cutting means at intervals. With this configuration, when the long sewing thread cutting means projects upward, only one of the three parallel thread groups can be securely hooked and pushed upward by the thread cutting blade. Further, by providing two or more thread cutting blades at intervals on the side edge of the sewing thread cutting means, even if the thread cutting blade located at a higher position fails to hook the sewing thread, the thread positioned at a lower position may be provided. Since the sewing thread is securely hooked by the cutting blade, the cutting becomes more reliable.

Preferably, a protection plate is provided at a position where the sewing thread cutting means reciprocates in the vertical direction and the thread cutting blade projects above the conveyor surface, and closes the position when no load is applied. The protection plate, when cutting the sewing thread,
It opens upward in conjunction with the rise of the sewing thread cutting means, and allows the thread cutting blade to protrude above the conveyor surface. With this protection plate, the safety of the leaf tobacco knitting machine is ensured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A leaf tobacco knitting machine according to the present invention will be described below with reference to the drawings. In addition, the leaf tobacco knitting machine itself, except for the configuration related to the sewing thread cutting means,
For example, a conventionally known single-thread annular sewing type sewing machine described with reference to FIG. 6A may be used. Therefore, in the following description, the description related to the sewing thread cutting means will be mainly described, and the description of the sewing machine itself will be omitted.

FIG. 1 is a schematic sectional view showing a portion where a cutting device for a sewing thread 10 is installed in a single thread circular stitch sewing machine as shown in FIG. 6A.
Indicates a state viewed from the left side. 20, 21, 2
Reference numeral 2 denotes a machine frame of the sewing machine. A machine frame 20 supports and accommodates a sewing machine and a driving device thereof (not shown). The machine frames 21 and 21 support the guide belt 5 rotatably. Further, the conveyors 1 are provided on the machine frames 22 and 22.
Are rotatably supported.

Although not shown in FIG. 1, as described with reference to FIG. 6A, the needle 4 is reciprocated vertically in the space S between the conveyor 1 and the guide belt 5, and is transferred by the conveyor 1. Sewing thread 10
And the braided strand is taken out by an operator at the end of the conveyor 1.

Downstream from the knitting section, a sewing thread cutting means 30 according to the present invention is attached to the machine frame by an appropriate means. The sewing thread cutting means 30 includes a solenoid 31 as an actuator and its movable iron piece 3.
2, a long thread cutting blade attachment body 33 attached to the movable iron piece 32, and a thread cutting blade 40 fixed to the thread cutting blade attachment body 33.

As shown in FIG. 1, the sewing thread cutting means 30 is provided with a thread cutting blade attachment 33 when not cutting.
Is located below the conveying surface (conveyor surface) of the conveyor 1 and the guide belt 5 (the position of the imaginary line in FIG. 1), and when the sewing thread 10 is cut, the solenoid 1 is operated to guide the conveyor 1 and the guide. It is fixed to the machine frame so that it passes through the space S between the belts 5 and protrudes upward and projects entirely above the conveyor surface (the position indicated by the solid line in FIG. 1).

The thread cutting blade attachment body 33 is a flat plate having a rectangular cross section, and is fixed to the movable iron piece 32 by a screw 34 in a posture in which the long side in the cross section is orthogonal to the direction of continuous movement. Further, the tip is also in a posture gradually curved outward in a direction crossing the moving direction of the series. The thread cutting blade 40 is fixed to the upper surface of the thread cutting blade attachment body 33 by screws 41 on one side that is the long side in the cross section. 2A, the thread cutting blade 40 is fixed such that a part of the upper side thereof slightly protrudes from the side edge of the thread cutting blade attachment body 33 to the side. A blade is formed in the portion.

The thread cutting blade mounting member 33 reciprocates in the vertical direction by the operation of the solenoid 31, and the moving direction L may be vertical. It is set so as to incline rightward in the figure by about 1 to 2 degrees from the direction R (the bending direction of the tip of the thread cutting blade attachment body 33).

The sewing thread cutting means 30 operates as follows. As described above, when the leaf knitting of the leaf tobacco by the single thread annular stitch sewing machine is in progress, the thread cutting blade attachment body 33 is at the lower non-cutting position shown by the phantom line in FIG. As described above, a series of leaf knitting is completed, and empty knitting of about 30 cm is performed.
When the approximate center of S reaches the position above the sewing thread cutting means 30, an appropriate sensor detects this and the solenoid 3
An activation signal of 1 is issued. Thereby, the thread cutting blade attachment body 33 jumps out upward and moves to the position shown by the solid line in FIG.

The movement causes the curved end portion of the thread cutting blade attachment body 33 to move into the space S between the conveyor 1 and the guide belt 5.
Contact with the empty knitted sewing thread 10 passing through. Then, as shown in FIG.
Three parallel yarns (10a, 10b, 10c) consisting of twists
Among them, the one located on the side (the thread 10c in the example in the figure) continues to rise in a state along the side edge of the curved end portion. Thereby, the thread 10c is hooked on the projecting portion of the thread cutting blade 40 (usually, a thread cutting blade located at a higher position) fixed to the side edge of the thread cutting blade attachment body 33 (the state shown in FIG. 2). Shown), the other two are left alone. Then, when the thread cutting blade attachment body 33 further rises, only the hooked one sewing thread 10c is pushed upward and cut halfway (FIG. 1 shows a state immediately before cutting). When the cutting of the sewing thread is completed, the thread cutting blade attachment body 33 returns to the non-cutting position indicated by the imaginary line in FIG.
Wait for the next disconnect.

As described above, when the sewing thread cutting means according to the present invention is used, one parallel thread consisting of two entanglements of an annular thread which is generated when a single thread annular stitching sewing machine is used. Since only the book is cut and separated in a state where the loop is released, the sewing thread waste 10X, 10X as shown in FIG.
Y does not occur. This eliminates the necessity of removing thread waste, which is necessary in the conventional knitting operation, and greatly reduces the labor required for the continuous knitting operation.

FIG. 3 shows another embodiment of the thread cutting blade attachment body 33 in the sewing thread cutting means. Here, the thread cutting blade is not fixed as a separate member, but the thread cutting blade 40a is formed integrally on the side edge of the thread cutting blade attachment body 33 in two stages, upper and lower. The function as the sewing thread cutting means is the same as that described above.

In the above example, the thread cutting blades are provided in two upper and lower stages. This is because the thread cutting blade (40,
In the case where the sewing thread 10c fails to hook the sewing thread 10c, the sewing thread 10c is hooked by the lower thread cutting blade. , The number may be one. Although the solenoid 31 is shown as an actuator for reciprocating the sewing thread cutting means 30 in the vertical direction, the present invention is not limited to this.

Further, although it is not essential in the leaf tobacco knitting machine according to the present invention, for the purpose of ensuring safety, the figure is placed on the conveyor surface of the conveyor 1 and the guide belt 5 at the place where the sewing thread cutting means 30 is arranged. A protection plate 50 as shown in FIG. 1 and FIG. 4 may be provided. In this example, the protective plate 50 is provided between the conveyor 1 and the guide belt 5 near the position where the thread cutting blade attachment 33 of the sewing thread cutting means 30 passes through the space S between the conveyor 1 and the guide belt 5 and projects upward. Is disposed so as to cover the conveyor surface from above, and one end is supported by a bearing 51 attached to the machine frame 20.

The bearing 51 includes a first support shaft 52 extending vertically and a second support shaft 53 extending horizontally. The first support shaft 52 fixes one end of the protection plate 50 to its upper end, and its lower end rotates with respect to a vertical axis (not shown) standing on the peripheral surface of the second support shaft 53. It is supported in a free state. And the vertical axis and the first
A spring (not shown) is interposed between the first support shaft 52 and the support shaft 52, and by the action of the spring, the protection plate 50 is turned by the load to rotate in a certain direction with the first support shaft 52 as a rotation point. When the load is removed from the moving state, the load automatically returns to the original position. On the other hand, the second support shaft 53 is a horizontal shaft 54 fixed to the machine frame 20 (see FIG. 1).
It is rotatably supported on the shaft.

In a normal state, that is, when leaf knitting of leaf tobacco is not performed, as shown by a solid line in FIG. 4, the protection plate 50 is placed on the conveying surface of the conveyor 1 and the guide belt 5. It is in a riding state. When the leaf knitting of the leaf tobacco starts, the conveyor 1 and the guide belt 5 move in the direction of arrow A in FIG. 4, and the leaf tobacco is also carried in the same direction. Due to the resistance between the surface of the protection plate 50 and the leaf tobacco passing therethrough, a load is applied to the protection plate 50 in the direction of arrow A, and the protection plate 50 rotates clockwise in FIG. To rotate. Then, it is held at a position turned in the horizontal direction indicated by a virtual line in FIG. 4 by the action of a stopper (not shown).

As described above, in this state, the thread cutting blade attachment body 33 is at the lower non-cutting position shown by a virtual line in FIG. Then, when a series of leaf knitting is completed and empty knitting is started, the resistance of the leaf tobacco applied to the protection plate 50 at the virtual line position is eliminated, and the protection plate 50 returns to the original solid line position. Then, as described above, the empty knitting part 1
When the approximate center of 0S reaches the position above the sewing thread cutting means 30, the thread cutting blade attachment body 33 jumps out upward and moves to the position shown by the solid line in FIG. In the course of the movement, the tip of the thread cutting blade attachment body 33 abuts against the back surface of the protection plate 50 and further rises, so that the protection plate 50 is moved upward with the horizontal shaft 54 fixed to the machine frame 20 as a rotation support shaft. Rotate (see FIG. 1). After cutting one sewing thread 10c, the thread cutting blade attachment body 33 returns to the non-cutting position indicated by the imaginary line in FIG. 1 and waits for the next cutting.
The protection plate 50 is also returned to the original horizontal position.

As described above, in the normal state, the protection plate 5
Numeral 0 is on the conveyor surface of the conveyor 1 and the guide belt 5, the space S is closed, and when the tip of the thread cutting blade attachment body 33 rises, the tip is covered by the protection plate 50. Therefore, accidental contact of the worker with the thread cutting blade attachment body 33 is avoided, and high safety is ensured.

[0028]

According to the present invention, sewing thread waste is not generated when cutting the sewing thread in the empty knitting portion, so that the work of removing the thread waste which is necessary in the conventional knitting operation becomes unnecessary, and the continuous knitting is performed. Work can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a main part of a leaf tobacco knitting machine equipped with a sewing thread cutting means according to the present invention, in which a sewing thread cutting device is installed.

FIG. 2 is a diagram for explaining a sewing thread cutting means according to the present invention;

FIG. 3 is a view showing another embodiment of the thread cutting blade attached body in the sewing thread cutting means.

FIG. 4 is a diagram for explaining a protection plate which is preferably attached.

FIG. 5 shows a sewing mode of a sewing thread formed when knitting is performed using a single-thread annular sewing type sewing machine, and a mode in which the sewing thread is cut by a conventional cutting apparatus (FIG. 5).
FIG. 5A is a diagram illustrating an embodiment (FIG. 5B) in a case where cutting is performed by a sewing thread cutting unit according to the present invention.

FIG. 6a shows the entire tobacco knitting machine, FIG. 6b
Shows a conventional sewing thread cutting device.

[Explanation of symbols]

1: Conveyor, 5: Guide belt, 10: Sewing thread, 3
0: sewing thread cutting means, 31: solenoid, 32: movable iron piece, 33: thread cutting blade attachment body 33, 40: thread cutting blade, 50: protective plate, S: space between conveyor and guide belt

Claims (3)

[Claims] 1. A leaf tobacco knitting machine in which a large number of leaf tobaccos are placed side by side on a conveyor, and the leaves are knitted using a single-thread circular stitch sewing machine while moving the leaf tobacco. A sewing thread cutting means reciprocating in the vertical direction is provided on the movement path of the sewing thread downstream of the knitting portion so that its tip is always located below the conveyor surface, and protrudes above the conveyor surface during cutting. And at least one thread cutting blade is provided on a side edge of the sewing thread cutting means, and when cutting the sewing thread,
A leaf tobacco knitting machine characterized in that the thread cutting blade cuts one sewing thread while pushing it upward. 2. The leaf tobacco according to claim 1, wherein said sewing thread cutting means reciprocates in a vertical direction along a direction slightly inclined to the side of the sewing thread with respect to a vertical plane. knitting machine. 3. The leaf tobacco knitting machine according to claim 1, wherein two or more thread cutting blades are provided on a side edge of the sewing thread cutting means at intervals.