JPS6052475A - Bobbin conveyance system - Google Patents

Abstract

PURPOSE:To improve efficiency of handling for bobbins by using at least a part of a substantial bobbin conveyance passage as a common conveyance passage and also using at least a part of an empty bobbin conveyance passage as a common conveyance passage in a bobbin conveyance system between a winder and the plural number of fine spinning machines. CONSTITUTION:A winder area W, which has winders WA, WB reeling yarns of A kind, B kind respectively, is connected with a fine spinning machine S by a common main conveyance passage ML. Thus, substantial bobbins from fine spinning machines SA1, SA2 and SB1, SB2 producing yarns of A kind, B kind respectively are transferred to a winder area W by a conveyance passage ML1, while bobbins emptied due to rewinding by a winder are transferred to the fine spinning machine S by a conveyance passage ML2. Winders WA, WB are joined with the conveyance passage ML1 by sorting devices C1, C2, substantial bobbins supply passages nl1, nl3 and empty bobbins return passages nl2, nl4 and the like, while each fine spinning machine SA1-SB2 is likewise joined with the conveyance passage ML1 by sorting devices D1-D4 and conveyance passages ml1-ml4 for exclusive use and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bobbin conveyance system, and in particular to a conveyance system for real bobbins or empty bobbins between a spinning frame and a winder.

In a so-called spinning winder in which a spinning frame and a winder are directly connected through a bobbin conveyance path, there is a system in which one winder and one spinning frame are directly connected through a closed loop conveyance path. In this case, real bobbins and empty bobbins can be transported freely within the closed loop, but for example, if the winder breaks down or undergoes periodic inspection, the real bobbins produced on the spinning machine directly connected to the winder will be It is necessary to transfer the supply to another winder. In this case, the bobbin must be transported to and from the winder outside the closed loop, and the real bobbin from the spinning machine is temporarily stored in the bobbin box and transported. It turns out.

In addition, when using the above winder to rewind a real bobbin from a spinning machine that produces yarn of other types, it is no longer possible to transport it within the closed loop, and a means of transport such as a self-bobbin pock must be used. This is extremely inconvenient for flexible production systems.

The present invention has been made in view of the above-mentioned problems, and provides a bobbin conveying system that directly connects a winder and a spinning frame, has seven stems, and enables an extremely flexible system. That is, the winder and a plurality of spinning machines are directly connected through a bobbin conveyance path, and at least a part of the conveyance paths for conveying real bobbins from the plurality of spinning machines to the winder have a common conveyance path, and The present invention provides a conveyance system in which at least a portion of the conveyance path of empty bobbins returned to a spinning machine has a common conveyance path.

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

FIG. 1 shows a first embodiment of the invention.

That is, the winder area (B) and the spinning machine area G) are connected by a common main conveyance path (ML). In the winder area (G), winding (WA) winds yarn of type A, and winding (wB) winds yarn of type B.

Also, the spinning machine (SA, 1) in the spinning machine area (S) (S
A2) produces yarn of type A, and uses a spinning spinning machine (SBI) (S
B2) is assumed to produce yarn of type B. Therefore, the yarn produced by spinning machine (SAI) (SA2) is
The yarn produced by the spinning frame (SBI) (SB2) is supplied to the spinning machine (WB). The yarn produced by each of the above-mentioned spinning machines (SA1) to (SB2) is conveyed as a real bobbin on the conveyance path (MLl), and the empty bobbin that has been rewound by winding is conveyed on the conveyance path (ML2). It is transferred and returned to each spinning machine. That is, the spinning machine (SA1
) and the main conveyance path (MLl) are a dedicated conveyance path (m1
1), followed by a dedicated transport path (mz2)
(mg3) (rn/4) connects the spinning machine and the main conveyance path.

On the other hand, on the winder side as well, the winding (WA) and the main transport path (MLI) are connected by a real bobbin supply path (Hi) and an empty bobbin return path (nA2). Similarly, in other windings (WB), the real bobbin supply path (nA'3) is connected to the empty bobbin and the return path (n64). Note that (ACFI) (ACF2) is a feeding device that feeds the thread end of the real bobbin to the wine ring.
(STI) (Sr1) is the return path (n/2) (nI!
4) This is a processing device for bobbins with a very small amount of remaining yarn that are returned from the top, and at this position, bobbins with an extremely small amount of yarn that cannot be resupplied to the wine ring are discharged out of the conveyance path system, or the bobbins are Only the very small amount of remaining yarn on the top is removed and transferred to the main transport path (ML) as an empty bobbin.

Next, each device constituting the above system will be explained.

The winding installed in the winder area (g) is, for example, one in which winding units as shown in FIG. 2 are arranged side by side. That is, a plurality of winding units (1) are arranged in parallel to form one wine goo (WA), and the winding unit (1) has a real bobbin transport path (nll) and an empty bobbin return path (n7!). 2)
is established between. (2)' (nJ2) is a rotating disk used for discharging onto the top, and guide plates (4) and (5) are provided above the rotating disk (2) at a constant interval. ) (5) and the other guide plate (6), a real bobbin inlet (7) and a surplus bobbin feed outlet (8) are formed, and the real bobbin is inserted between the guide plates (4) and (5). Waiting groove (9)
, a bobbin discharge groove (1) is formed.

The connection position between the actual bobbin standby groove (9) and the bobbin discharge groove (1) is the winding position (3). (11) is the lever for discharging the empty bobbin or the remaining yarn. Below the tray at the rewinding position (3), there is a
A compressed air injection nozzle (12) connected via a conduit to a compressed air supply source.
The compressed air ejected from the nozzle (12) is ejected from the space inside the peg of the tray (TA) through an arcuate slit (not shown) formed in the rotating disk (2), into the core tube of the real bobbin, and The relay pipe (13) cored in the tube sucks and holds the blown-up yarn end, rotates it upward, and introduces it into the knotter, where the package-side yarn end and the actual bobbin-side yarn end are knotted, and the winding begins. It will begin. (14) is the Aya P drum, and (15) is the winding package.

In other words, the actual bobbin that has been transferred on the transport path (nzl) has the thread end for tying pulled out by the thread pulling device (ACFI), and is inserted into the tray with the thread end inserted into the core tube. ＼Transferred to Waing's conveyance path (nzl).

The tray (TA) of the real bobbin (KA) that has moved through the conveyance path (nJl) is placed on the guide plate (4) (5) of the winding unit (1a).
) (When the bobbin is ready, it moves onto the rotating disk (2), enters the waiting groove (9) from the intake port (7), and reaches the rewinding position (3). In this way, the subsequent bobbin enters the waiting groove. (9) When the waiting groove (9) is filled with a predetermined number of real bobbins, the real bobbins sent after that cannot enter the waiting groove, and the next winding unit is passed through the delivery port (8). (i
Go to b).

In this way, the trays with real bobbins inserted are filled sequentially from the take-up unit Bia) closest to the take-up device (ACFI) to the units (ib) to (1n), but there is no empty space in the standby groove (9). When this occurs, the winding unit (1a) is
Starting from the closest unit, use the empty space in the knit (1n) feed outlet (8) to enter the circulation path (16) and follow the arrow (17).
) direction, and is again supplied to the real bobbin transport path (nJl).

Next, a description will be given of the tray that is used to transport the actual bobbins and empty bobbins. In this embodiment, two types of yarn are handled, so two types of trays are used, and the type of actual bobbin is detected using the trays. That is, in FIG. 3, the tray (TA) shown in (A) is a tray for bobbins of type A, and has an annular recess at a distance (hl) from the reference surface (19) of the cylindrical base (18) of the tray. A groove, that is, an identification groove (20a) is formed, and a base portion (21) and a bobbin insertion veg (22) are integrally formed in the center of the base body (18).

Also, the interior of the trays (TA) (TB) is the bottom surface (23
) and communicates with the air outlet (24) at the tip of the beg.

Fig. 4(b) shows a tray (TB) for bobbins of B type, except that an identification groove (20b) is formed at a distance (h2) from the reference surface (19) of the base (18). T.A.)
It has a similar structure.

Next, a fruit bobbin of type A is transported by the tray,
A total of four types of sorting devices will be explained: empty bobbins, B type real bobbins, and empty bobbins.

That is, in FIG. 1, since the trays with the above-mentioned approximately four types of bobbins inserted are basically transported in a random order on the main transport path (ML), the winder area (W), the spinning machine area In (8), only a specific bobbin is transferred to the main transport path (ML).
It is necessary to import from I).

Figure 4 shows a sorting device (Q) installed in the main conveyance path of the winder area (G).In other words, in the winder area, there is a sorting device that sorts the types, takes in full bobbins, and discharges empty bobbins. .

In Fig. 4, the main transport path (MLI) between the empty bobbin return path (nJ2) and the real bobbin transport path (n41) connected to the main transport path (MLl) has an empty bobbin for sorting empty bobbins and real bobbins. - A real sorting device (25) and, following the device, a variety sorting device (26) that sorts out the type of real bobbins and takes in only the real bobbins of the winder.

The empty/real sorting device (25) is equipped with a kite board (27 &) (27b) that constitutes a conveyance path (MLI) as shown in Figure 4.5.
), that is, on the opposite side to the bobbin intake passage (28), the sharp tip sorting guide member (29) is installed upright on the guide plate (27a)
) and an enlarged portion (27bl) in the conveyance path. The guide member (29) has a central parallel portion (29a
) is the tray guide edge (27al) of the guide plate (27a)
, and both sides of the horizontal part (29a) are provided with inclined parts (
29b). Note that the tray conveyance path (MLl
) is composed of a belt conveyor (3) and guide plates (27a) (27b) on both sides that regulate and guide the base (21) of the tray (TA) placed on the conveyor, as shown in Fig. 6. and guide plates (27a) (27b)
The tray is transported on the conveyor along the guide edge of the tray.

Therefore, in FIG. 4, the tray (TA) whose position is regulated to the guide edge (27a 1 ) side by the passage (31) having a width approximately equal to the diameter of the platform (21) is located at the guide edge (27a 1 ).
) in the direction of the arrow (32), and when you reach the position of the empty/full sorting guide plate (29), if the tray (TA) holds an empty bobbin, the maximum outer diameter of the empty bobbin is tray(
The guide plate (2) is smaller than the diameter of the base (21) of the TA).
9) Go straight through that position without making any contact with it. On the other hand, the tray (
When a real bobbin (KA) or a bobbin with residual thread is inserted into the real bobbin (KA), the maximum outer diameter of the thread waste (1) of the real bobbin (KA) is larger than the diameter of the base of the tray, so the thread layer The outer peripheral surface is the horizontal part (29a) of the empty/real sorting guide plate (29).
), and the path of the tray is pushed toward the intake path (28). That is, from this position, the moving locus (Ql) (Q2) of the tray center (01) of the empty bobbin and the tray center (02) of the real bobbin changes, so that the empty and real bobbins are sorted.

The product sorting device (26) is for sorting two types of trays each having a real bobbin that moves on a trajectory (Q2), and has different identification grooves (
20a) (20b) to sort the intake passage (20b).
8) and trays to be sent to the main transport path (MLI). That is, the 7th to 9th
The figure shows a detailed diagram of the above-mentioned product sorting device.

At the branch point, as shown in FIG. 7, a tray sorting member (33) and a sorting guide member (34) for sorting the trays in two directions are provided following the guide plate (27a).

As shown in FIG. 8, the sorting member (33) has a pin (37) fixed on a fixed bracket (35) and
(37)
) and a sorting gauge (38) fixed in parallel to the gray color (37).

The side edge of the above reference play) (37) is parallel to the rotating direction of the conveyor from a parallel part (39) and, following the parallel part (39), an inclined part (40) that is inclined toward the passageway (28). Both ends of the plate (37) have upwardly facing enlarged portions (4).
1) (41), and is formed so that there is no problem in the entry and delivery of the tray. Furthermore, the expanded part (41) (
The lower surface (37a) of the plate between 41) is used as a reference surface,
This is the surface that comes into contact with the upper surface (19) of the base (18) of the tray (TA).

As shown in Fig. 8, the sorting gauge (38) has a mounting part (42) attached to the reference plate (37), a vertical part (43) bent perpendicularly from the mounting part (42), and a further vertical part. The gauge part bent at right angles from (43) (
The gauge part (44) is an end plate with a thickness 1) that is sufficiently smaller than the width of the groove (20a) of the tray (TA). 38)
are fixed by screws or welding so that the entire area is parallel to the reference plane (37a) of the reference plate (37). Furthermore, the guide edge of the gauge (38) is inclined toward the center of the conveyor (30), and the said sorting member (
The guide plate (27a) on the side opposite to the inlet 33) has a sloped part (48) suitable for transporting the trays through the main transport path (MLl), where trays that do not enter the intake port are sorted by the guide member (34). Or curved part and parallel part (27a
'l), etc.

Furthermore, the sorting guide member (34) fixed to the frame has an acute-angled tip (49) approximately at the center of the conveyor bell (30), and one guide edge (50) that continues to the tip.
) forms a tray entry passage with the inclined surface (40) of the guide member (37), and the other guide edge (51) forms a main conveyance line ( MLI). In addition,
The tip (49) of the sorting guide member (34) is located in the groove (20a) of the tray that enters the intake port (28).
Tray (TA) passed with gauge (38) located inside
The center (02) is offset by a distance (l!2) toward the intake port (28) from the contact point (X2) between the tip (49) and the tray base, and corresponds to the gauge (38). When the tray (TB) without groove is in position, the guide plate (
27a) and is transferred to the tip (49).
A setting is also provided at a position such that the center (01) of the tray (TB) is deviated by a distance (7!1) toward the main transport line (MLl) from the contact point (Xl) when the tray (TB) comes into contact with the tray (TB). .

The only difference is that the sorting gauge in the sorting device is provided at the same height as the groove position of the corresponding tray.

That is, the gauge (38) and reference surface (37a) in FIG.
) is a distance (h) equal to the groove (20b) of the tray (TB) in Figure 3 (b) at the intake port (nI!3).
h2).

Next, the bobbin sorting device (Dl) (D
2) will be explained. In other words, on the spinning machine side, a sorting device suitable for taking specific empty bobbins randomly transported on the main transport path (IVILI) into a dedicated transport path of a specific spinning machine and discharging real bobbins to the main transport path. is provided.

The sorting device shown in FIG. 10 is the spinning machine (S) shown in FIG.
AI) to (SB2) are provided at the connecting portions with each of the main transport paths. That is, the main transport path (MLl) between the actual bobbin discharge path (52) and the empty bobbin loading path (53) includes a transport path (
Place the tray (TA) on one guide edge (27
A guide plate (27a) that regulates the position toward the bl) side, an empty/full sorting device (54) for trays that are transferred along the guide edge (27bl), and a device that discriminates between the two types of empty bobbins and sends them to the receiving day. A type sorting device (55) for taking in empty bobbins and sending them out to the main transport path (MLl) side is provided on the entrance side of the taking in port (56).

The sorting device (54) includes a sorting guide plate (2) shown in FIG.
It has the same structure as 9), except that it is installed upright on the guide plate (27b) on the opposite side, that is, on the intake port (56) side.

Further, since the product sorting device (55) has the same structure as that shown in the seventh to ninth figures, the description thereof will be omitted.

The operation of the system having the transport path and various sorting devices as described above will be described next.

That is, in FIG. 1, each spinning machine (SA1) to (SB2
) is a machine in which a large number of spindles are arranged back to back in the longitudinal direction, and the empty bobbin is taken in from the take-in passage (53) with the empty bobbin inserted on the tray and positioned along the spindle row, The rolled up real bobbin on the spindle and the empty bobbin on the tray are exchanged, and the tray with the real bobbin is transferred from the real bobbin discharge path (52) to the main transport path (ML).
I) is ejected upwards.

Now, we will explain the case where yarn of type A produced from the spinning machine (SAI◇ (SA2)) is transported to the corresponding winder (WA) and the empty bobbin is returned to the spinning machine (SAI) (SA2). , the real bobbin discharged from the real bobbin discharge path (52) onto the main transport path (MLl) is
As shown in Figure 0, it is transported in the direction of the arrow (57), and is passed through the intake path (56) by the empty/real sorting guide (54) on the intake side.
The position where the base portion (21) of the tray having the real bobbin comes into contact with the guide member (34) is at the position indicated by the chain double-dashed line (21a), as shown in FIG. According to the principle, the actual bobbin (KA) is transported on the main transport path (MLl) toward the winder (Vv).

On the other hand, in the winder area, the spinning machine (SAI) shown in the first diagram
) is rewound by the winder (WA), so it passes through the intake port (n63) at the winder (WB) position. That is, in FIG. 4, the real bobbin (KA) is pushed toward the intake port side (28) by the empty/full sorting guide (29), but the product sorting device installed at the intake port of the winder (WB) Since the gauge (38) is located at a distance (h2) from the reference plane (37a) shown in Figure 8, it is located at a distance (h2) from the reference plane (19) of the tray (Figure 3 (TB)) in which the A type fruit bobbin is inserted. The identification groove (20a) located at the distance (hl) and the gauge (3)
8) do not match, the outer peripheral surface of the base of the tray (TA) is pushed by the gauge (38) and moves to the center position (01) of the A type tray as shown in Fig. (ng3
) without being taken into the winder (WA
).

The tray of type A that has reached the intake port of the winder (WA) is
Since the gauge (38) shown in FIG.
) is transferred to the real bobbin transfer path (n61).

The actual bobbin transported through the transport path (n7!l) is automatically supplied to each winding unit and rewound by the above-described operation in the state shown in the second figure.

On the other hand, the empty bobbins of type A discharged from the winder (WA) are discharged from the empty bobbin return path (n12) onto the main transport path (MLl) as shown in Fig. 4 while being inserted in the tray. , and is again transferred to the main transport path (MLl) in the direction of the arrow (32). In this case, the tray (TA) containing the empty bobbins moves straight without being affected by the empty/actual sorting guide (29), and therefore moves toward the main transport path (MLI) after coming into contact with the guide member (34). transported.

Empty bobbins of type A are transported in the direction of arrow (58) on the main conveyance path (ML2) for returning empty bobbins shown in Fig. 1, and are returned to the spinning machine area (0.
Connecting part (D2) with B2) In (D2), as explained in Fig. 10, the tray for type A is connected to the connecting part (D2).
It is prevented from entering the intake port by the gauge (38) of (D2), and is transported toward the spinning machine (SAI) (SA2). Connection part with spinning machine (8A1) (SA2) (
When it reaches Dl), the gauge (38) and the identification groove of the tray match at that position, so it enters the intake port (56) and is taken into a predetermined spinning machine (SAI) (SA2).

As shown in the first figure, the empty bobbins are transferred in the direction of arrow (58), so the spinning machines (SAI) of the same type installed side by side (
SA2), the spinning machine (S) on the upstream side of the transport path (MLl)
A2) The empty bobbin will be taken in first, but
When the passage (56) in Fig. 10 is full of empty bobbins, the subsequent empty bobbins are blocked from entering by the tray at the rear end in the passage (56), and the intake port is directed toward the spinning machine on the downstream side. The path length is set.

In this way, the fruit bobbin of the A variety is delivered to the winder (WA), and the empty bobbin of the A variety is supplied to the spinning machine (SAI) (SA2) for the A variety. In the same way, the B type's full bobbins and empty bobbins are also supplied to the corresponding winders and spinning machines and sent back. That is, the conveyance path for conveying different types of bobbins is made into a common conveyance path, and the various bobbins conveyed to the spinning machine are supplied to the corresponding spinning machines and wirers without being mixed up.

In addition, in the above seven stems, for example, the spinning machine (SAI) shown in Fig.
) (SA2) (SB1) produces yarn of type A, and the dazzle is rewound using winder Hiroshi), and then it is sent to another spinning machine (SB2).
) to produce yarn of type B and wind it back in the winder (b)), the conveyance path can be easily changed by simply changing the position of the gauge of the sorting device.

Further, for example, by using two types of winders (WA) (WB), it is possible to create a system in which irregularly shaped yarns, that is, real bobbins of different sizes, are mixed and conveyed at random within a common main conveyance path.

FIG. 11 shows a second embodiment of the system of the present invention. That is, this embodiment is a conveyance system in which one winder (G) is substantially divided into a plurality of winding sections (SCI) to (SC5), and yarns of different types are rewound in each section. .

The five spinning machines (SA) to (SE) installed in parallel produce five types of yarn, and one winder (G) is placed on the side of the spinning machines (SA) to (SE). The wire/winder (5) has a number of winding units shown in Fig. 2 arranged side by side, and a supply path (59 &
) to (59e) are separated for each winding section and formed into a closed loop, so that the actual bobbin taken in from the main transport path (MLI) is supplied to each specific section from the delivery path (60). Branch paths (61&) to (61e) are formed, and the product sorting devices shown in FIGS. 7 to 9 are provided on the entry sides of the branch paths (61a) to (61e). in this case,
Since five types of bobbins are transported at random, five types of trays are also prepared, that is, the distance 0'&) from the reference surface (19) of the identification groove (20L) in Fig. 3 is (hl) to (h5). )
The trays formed at different positions are used, and the sorting gauges (Fig. 8 (3)
8)) are also provided at positions commensurate with each distance (hl) to (h5).

On the other hand, there is a common closed-loop May 7-41i feed path (MLI) that connects the spinning machines (SA) to (SE) and the wire/da
) and the connection part (El) between each spinning machine (SA) to (SE)
~(B5) is an empty/actual sorting device (54) shown in Figure 10.
and a product sorting device (55). Each connection (
The variety sorting devices El) to (B5) are the same as the sorting devices provided in the branch paths (61a) to (61e) of each section of the winder. In addition, Fig. 11 (AC
F) is a pick-up device, and (ST) is a very little remaining thread removing device or a bobbin processing device that extracts a bobbin with a very little remaining thread from a tray and inserts an empty bobbin.

Therefore, in the system of this embodiment, each spinning machine (S
The yarns produced in A) to (SE) are randomly mixed and conveyed on a common main conveyance path (MLI) by trays dedicated to each type, and are transferred to a winder (W ladle delivery path (6) at connecting section 0). The bobbins of the spinning machine (SA) are sent to the section (SCI), the bobbins of the spinning machine (SB) are sent to the section (SC2), and so on. are sorted and supplied to specific winding sections.

On the other hand, the empty bobbins discharged from the winder (G) are further transferred from the common return path (62) to the common main transport path (ML2).
), are randomly transferred in the direction of the arrow (63), and returned to the spinning machine area (S). Similarly to the previous embodiment, empty bobbins of the same type are stored in a particular spinning machine. They are sorted, sorted, and returned for supply.

Therefore, in the system of this embodiment, production can be easily adjusted by changing the number of winding units in the winding section of the winder according to the production speed of the yarn being produced. Even if the spinning machines (SA) to (SE) produce the same type of yarn, it is possible to convey it as is in a system with multiple product specifications without the need to adjust the conveyance path or sorting device.

Furthermore, if the layout is as shown in FIG. 11, it is easy to connect the spinning machines in the existing factory by inserting a winder (b) between the spinning machines except for one spinning machine.

As described above, in the present invention, in a bobbin transport system between a winder and a plurality of spinning machines, at least a portion of the transport path for transporting real bobbins from the plurality of spinning machines to the winder is a common transport path, and At least a portion of the conveyance path for empty bobbins returned from a winder to a plurality of spinning machines is shared, so that a well-balanced conveyance system can be constructed and a wide variety of products can be set. Furthermore, the winder and the spinning frame can be connected through the main conveyance path, that is, one conoveyor, so that the conveyance space can be used effectively.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram showing a first embodiment of the system of the present invention, Fig. 2 is a perspective view showing a take-up unit of a winder applied to the system, and Fig. 3 is a tray that is the bobbin conveyance medium of the system. 4 is a plan view showing an example of a bobbin sorting device on the winder side, FIG. 5 is a perspective view of an empty/full sorting guide, and FIG. 6 is a sectional view of a bobbin conveyance path.
Figures 7 to 9 are diagrams showing an example of a product sorting device. Figure 7 is a plan view, Figure 8 is a side view, Figure 9 is a front view, and Figure 10 is an example of a bobbin sorting device on the spinning machine side. Plan view showing 11th
The figure is a layout diagram showing a second embodiment of the system of the present invention. (W) (WA) (WB)... Winder (SA)
~(SE)...Spinning machine (ML)...Main conveyance path (KA)...Actual bobbin (kA,)...Empty bobbin 1
1 Figure 2 Figure 3 Figure 4 Decoy Figure 5 Figure 6

Claims (1)

[Claims] A bobbin conveyance system between a winder and a plurality of spinning machines, in which at least a part of the conveyance path for conveying real bobbins from the plurality of spinning machines to the winder is a common conveyance path, and the bobbins are returned from the winder to the spinning frame. A bobbin conveyance system characterized in that at least a part of the conveyance path for empty bobbins is a common conveyance path.