EP0761587A2

EP0761587A2 - Bobbin removal device

Info

Publication number: EP0761587A2
Application number: EP96114024A
Authority: EP
Inventors: Yuji Toudou; Itaru Yokota
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 1995-09-08
Filing date: 1996-09-02
Publication date: 1997-03-12
Also published as: EP0761587A3; KR100276550B1; KR970015818A; CN1152640A

Abstract

The present invention is arranged with a removal belt 13, 113 sloping upwards in the tray transport direction, pushes this removal belt in contact with the bobbin 5, 105 on the tray 1, 101 and removes the bobbin from the tray.

As a result, the bobbin can be removed by a simple structure involving only one removal belt. Furthermore, as the direction of the bobbin after removal by a single removal belt is undetermined, a guide member 19 and bobbin direction control means 118 by air or the like is arranged.

Description

FIELD OF THE INVENTION

The present invention relates to a bobbin removal device on an automatic winder or the like, for removing empty bobbins from a tray loaded with bobbins that have become empty after the yarn has been wound off. The empty bobbins removed from the tray by the bobbin removal device are then transported to a spinning machine or the like.

PRIOR ART

Conventionally, a bobbin removal device for removing an empty bobbin from a tray by gripping the empty bobbin by belts positioned above the transport path of the tray and lifting the bobbin upwards, and a bobbin removal device for removing an empty bobbin from a tray by the arrangement of a gripping device above the transport path of the tray that grips the top part of the empty bobbin and lifts it upwards have been known.

PROBLEMS TO BE SOLVED BY THE INVENTION

The aforementioned conventional bobbin removal devices are complex in structure and cannot be made more compact.
It is an object of the present invention to propose a bobbin removal device that solves the problems conventional bobbin removal devices have and increases the operational efficiency of the removal of an empty bobbin.

SUMMARY OF THE INVENTION

In order to achieve the aforementioned object, the present invention, being a bobbin removal device that removes bobbins from a tray being transported, is arranged with a removal belt that makes contact with the bobbin on the aforementioned tray and exerts a force on that bobbin in the transport direction, moreover in a direction that seperates it from the tray, is positioned with a guide member that makes contact with the top of the aforementioned bobbin and guides the bobbin to a bobbin ejection means by the force of the removal belt and further, the aforementioned removal belt is positioned so that it may project freely into the tray running path.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a perspective view of the bobbin removal device of the present invention.
Figure 2 is a plan view of the bobbin removal device of the present invention.
Figure 3 is a front view of the bobbin removal device of the present invention.
Figure 4 is a summarised plan view showing the bobbin removal procedures.
Figure 5 is a perspective view showing another embodiment of the bobbin removal device.
Figure 6 is a top view of Figure 5.
Figure 7 is a front view of Figure 5.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Using Figures 1 to 4, an embodiment of the bobbin removal device of the present invention will be described but the present invention is not limited to the present embodiment providing the objects are not surpassed.
1 is a tray being transported in a predetermined direction of which the base is loaded on a round or flat belt conveyor 2. The tray 1 is transported along a pathway 4 formed between horizontal guide boards 3a, 3b arranged opposing each other so that they enclose the small diameter part 1a of the tray 1. The bobbin 5 is inserted on a peg 1b projecting from the top surface of the small diameter part 1a of the tray 1.
6 is a support frame arranged along the pathway 4 and having a sloping part 6a that inclines upwards towards the transport direction of the tray 1 and a horizontal part 6b approximately parallel with the horizontal guide boards 3a, 3b. Support frame 6 is supported by a vertical shaft 7 projecting from one of the horizontal guide boards 3a so that it may rotate freely. 8 is a cylinder arranged on the horizontal guide board 3a and the end of the piston rod 8a of the cylinder 8 is attached so it may rotate freely with the end part of the horizontal part 6b of the support frame 6 positioned on the side opposite the pathway 4 enclosing the vertical shaft 7. The cylinder 8 is operated by a suitable means and the support frame 6 is able to rotate about the vertical shaft 7 due to the extension or retraction of the piston rod 8a.
9 is a motor affixed to the slope 6a of the support frame 6 (refer to Figures 2 and 3) and a pulley 10 is attached to the drive shaft 9a of the motor 9 extending downwards through the slope 6a of the support frame 6. Furthermore, a shaft 11 extending downwards is attached to the slope 6a and spaced a predetermined distance from the drive shaft 9a. A pulley 12 is affixed to the shaft 11. A removal belt 13 comprising a continuous belt with a round cross-section or the like is stretched between the pulley 10 attached to the drive shaft 9a of the motor 9 and the pulley 12 attached to the shaft 11. That removal belt 13 is arranged inclining upwards in the transport direction of the tray 1. Also, motor 9 drives the removal belt 13 such that the straight part 13a of the removal belt 13 positioned on the pathway 4 side moves in the same direction as the transport direction of the tray 1 and moreover, moves faster than the transport speed of the tray 1. It should be noted that in the present embodiment, the pulley 10 attached to the drive shaft 9a of the motor 9 has a larger diameter than the pulley 12 attached to the shaft 11 but this diameter may be the same or smaller.
Thus, when the cylinder 8 operates, the support frame 6 connected to the tip of the piston rod 8a rotates about the vertical shaft 7. Due to this, the straight part 13a positioned on the pathway 4 side of the removal belt 13 becomes approximately parallel with the pathway 4 and then projects slightly into the pathway 4. Due to this, the straight part 13a positioned on the pathway 4 side of the removal belt 13 contacts the lower surface of the empty bobbin 5 loaded on the tray 1 being transported along the pathway 4.
Furthermore, from the above state, due to extension of the piston rod 8a by operation of the cylinder 8, the support frame 6 rotates in a clockwise direction about the vertical shaft 7 as in Figure 2 and the straight part 13a positioned on the pathway 4 side of the removal belt 13 moves away from the bobbin 5 loaded on the tray 1 being transported along the pathway 4.
14 is an approximately square bobbin receptor arranged on the side opposite the pulley 10 which is attached to the drive shaft 9a of the motor 9 with the pathway 4 inbetween. A vertical wall 14b lower than the height of the peg 1b of the tray 1 is formed on the downstream half of the side 14a along the pathway 4 of the bobbin receptor 14 (The transport direction of the tray 1 is called downstream and the opposite direction to the transport direction of the tray 1 is called upstream. Accordingly, for example, in Figure 2, the movement toward the left being the transport direction is downstream and the movement to the right is upstream.).
Furthermore, vertical walls 14e,14f slightly higher than the height of the peg 1b of the tray 1 are arranged on the side 14c distanced from the pathway 4 and parallel with the aforementioned side 14a and the side 14d positioned upstream and at right angles to the aforementioned side 14a respectively. Vertical walls 14b, 14e, 14f are not formed at side 14g which is positioned downstream and at right angles to the aforementioned side 14a. It should be noted that, as necessary, 14h is an extension part comprising an extension of the side 14a of the bobbin receptor 14 upstream along the pathway 4.
15 is a roller on which is supported one return part of the continuous belt conveyor (bobbin ejection means) 16. The load surface 16a of the continuous belt conveyor 16 is arranged so that it is roughly the same height as the upper surface of the bobbin receptor 14. Furthermore, the continuous belt conveyor 16 is positioned roughly parallel with the straight part 13a positioned on the side of the pathway 4 of the removal belt 13 in the aforementioned empty bobbin 5 removal position. 17a, 17b are guide walls arranged on both sides of the continuous belt conveyor 16.
18 is a rod positioned on the side opposite the continuous belt conveyor 16 with the bobbin receptor 14 inbetween. A flat spring guide member 19 roughly flattened inverted v-shaped when seen from above is attached to the top end of that rod 18. That guide member 19 is so arranged that, if seen from above, the pointed part 19a of the flattened inverted v-shape faces the straight part 13a of the removal belt 13 positioned on the pathway 4 side. Furthermore, the guide member 19 is arranged and positionally adjusted so that the head of the empty bobbin 5 loaded on the tray 1 being transported along the pathway 4 passes over the pointed part 19a from the center of the inclined part 19b of the rod 18 side of the guide member 19 and contacts the sloping part 19c of the free end of the guide member 19. It should be noted that it is preferable to adhere a friction material comprising rubber or soft synthetic polymer onto the surface of the guide member 19 that contacts the empty bobbin 5 and apply a little resistance to the empty bobbin 5.
Next, the empty bobbin removal operations of the bobbin removals device having the aforementioned structure will be described.
Firstly, the cylinder 8 is appropriately controlled so that the straight part 13a positioned on the side of the pathway 4 of the removal belt 13 is approximately parallel with the pathway 4 and moreover, so that the lower surface of the empty bobbin 5 loaded on the tray 1 being transported along the pathway 4 contacts the straight part 13a of the removal belt 13 positioned on the side of the pathway 4. From this state, while the tray 1 is being guided by the horizontal guide boards 3a, 3b, when the lower surface of the empty bobbin 5 loaded on the tray 1 contacts the straight part 13a of the removal belt 13 positioned on the side of the pathway 4, the empty bobbin 5 in contact with the removal belt 13 is gradually lifted up and removed from the peg 1b of the tray 1 due to, as previously mentioned, the removal belt 13 being arranged inclining upwards in the transport direction of the tray 1 and the straight part 13a of the removal belt 13 positioned on the side of the pathway 4 running in the same direction as the transport direction of the tray 1 and moreover, running faster than the transport speed of the tray.
While the top part of the empty bobbin 5 loaded on the tray 1 is in contact with the straight part 13a of the removal belt 13 positioned to the side of the pathway 4, firstly, as shown in Figures 4 (A) and (B), it contacts the rod 18 side of the mid-part of the slope 19b of the guide member 19 and due to that spring force, is restrained on the removal belt 13 side, thus the bobbin 5 is reliably lifted upwards by the removal belt 13.
Next, as shown in Figure 4 (C), as the guide member 19 is arranged so that the top part of the empty bobbin 5 contacts the sloping part 19c of the free end of the guide member 19 immediately after being removed from the peg 1b of the tray 1, the top part of the empty bobbin 5 removed from the peg 1b of the tray 1 moves along the sloping part 19c of the free end of the guide member 19 and falls towards the continuous belt conveyor 16. Furthermore, as the empty bobbin 5 is rotated in contact with the guide member 19 while being removed by the removal belt 13, it can be removed from the peg 1b of the tray 1 in a stable state.
Also, the atop part of the empty bobbin 5 which has fallen towards the continuous belt conveyor 16 contacts the vertical walls 14e, 14f of the bobbin receptor 14 which are slightly higher than the peg 1b of the tray 1. As the structure is so arranged that the top part of the empty bobbin 5 is positioned higher than the lower part of the empty bobbin 5, the empty bobbbin 5 is prevented from jumping over the vertical walls 14e, 14f or from falling from the bobbin receptor 14. Furthermore, as a vertical wall 14b lower than the height of the peg 1b of the tray 1 is arranged on the downstream half of the area 14a of the bobbin receptor 14 which is alongside the pathway 4, the empty bobbin 5 removed from the peg 1b of the tray 1 and which drops onto the bobbin receptor 14 is prevented from moving in the direction of the pathway 4 by the vertical wall 14b even if it wants to and as a consequence, no empty bobbins 5 fall from the bobbin receptor 14. If the height of the vertical wall 14b is made higher than the peg 1b of the tray 1, the lower part of the empty bobbin 5 removed from the peg 1b of the tray 1 contacts the vertical wall 14b and trouble such as the empty bobbin 5 falling from the bobbin receptor 14 occurs.
As described above, as the top part of the empty bobbin 5 removed from the peg 1b of the tray 1 by the removal belt 13 is pushed over towards the continuous belt conveyor 16 by the guide member 19 and the bobbin receptor 14, it can be reliably loaded on the continuous belt conveyor 16 and is transported in the desired direction such as towards a spinning frame or the like.
When the bobbin 5 loaded on the tray 1 is a full package or has some yarn remaining, the full package or remaining yarn of the bobbin 5 is detected by a detection device (not shown in the drawings), the cylinder 8 is operated due to a detection signal from the detection device, the support frame 6 is rotated about the vertical shaft 7 in a clockwise direction as shown in Figure 2 due to the extension of the piston rod 8a and the removal belt 13 is retracted from the bobbin 5 loaded on the tray 1 being transported along the pathway 4. Thus in this way, when the bobbin 5 loaded on the tray 1 is a full package or has yarn remaining, it is made to bypass the bobbin removal device and is returned once again to the automatic winder.
It is preferable for the removal belt 13 to be made to contact the lower part of the bobbin 5. The reason being is that the belt 13 pushes one side of the bobbin 5, the bobbin 5 is removed from the peg 1b of the tray 1 and as the peg 1b is inserted in the lower part of the bobbin 5, there is no entangling of the bobbin 5 and it can be smoothly removed.
As described above, it is necessary for the removal belt 13 to contact the surface of the bobbin 5 and generate a predetermined removal force and a continuous round belt or V-shaped belt can be used for this. However, it is preferable to use a flat belt. The reason being is that there is little danger of damage to the bobbin surface by the contact of a flat belt with the bobbin surface. Furthermore, the height and width of the vertical walls 14b, 14e, 14f of the bobbin receptor 14 can be suitably set corresponding to the length, thickness, shape etc of the empty bobbin 5 so that the empty bobbin 5 removed from the peg 1b of the tray 1 is reliably guided in the direction of the continuous belt conveyor 16.
Next, another emodiment of the present invention will be described with reference to the Figures 5 to 7.
As shown in the Figures, 101 is a tray being transported in a predetermined direction of which the base is loaded on a round or flat belt conveyor 102. Tray 101 is transported along a pathway 104 formed between horizontal guide boards 103a, 103b arranged opposing each other so that they enclose the small diameter part 101a of the tray 101. The bobbin 105 is inserted on a peg 101b projecting from the top surface of the small diameter part 101a.
106 is a support frame arranged along the pathway 104 and having a sloping part 106a that inclines upwards towards the transport direction of the tray 101, horizontal guide boards 103a, 103b and an approximately level horizontal part 106b. The support frame 106 is supported by a vertical shaft 107 projecting from one of the horizontal guide boards 103a. 108 is a cylinder arranged on the horizontal guide board 103a and the end of the piston rod 108a of the cylinder 108 is attached to the end part of the horizontal part 106b of the support frame 106 enclosing the vertical shaft 107 and is positioned on the side opposite the pathway 104. The cylinder 108 is operated by a suitable means and the support frame 106 is able to rotate about the vertical shaft 107 due to the extension or retraction of the piston rod 108a.
109 is a motor affixed to the slope 106a of the support frame 106 (refer to Figures 2 and 3) and a pulley 110 is attached to the drive shaft 109a of the motor 109 extending downwards through the slope 106a of the support frame 106. Furthermore, a shaft 111 extending downwards is attached to the slope 106a and spaced a predetermined distance from the drive shaft 109a. A pulley 112 is affixed to the shaft 111.
A removal belt 113 comprising a continuous round belt or the like is stretched between the pulley 110 attached to the drive shaft 109a of the motor 109 and the pulley 112 attached to the shaft 111. That removal belt 113 is arranged inclining upwards in the transport direction of the tray 101. Also, the motor 109 drives the removal belt 113 such that the straight part 113a of the removal belt 113 positioned on the pathway 104 side moves in the same direction as the transport direction of the tray 101 and moreover, moves faster than the transport speed of the tray 101. It should be noted that in the present embodiment, the pulley 110 attached to the drive shaft 109a of the motor 109 has a larger diameter than the pulley 112 attached to the shaft 111 but this diameter may be the same or smaller.
Thus, the cylinder 108 operates and the support frame 106 connected to the tip of the piston rod 108a rotates about the vertical shaft 107. Then the straight part 113a of the removal belt 113 positioned on the pathway 104 side becomes approximately parallel with the pathway 104 and then projects slightly into the pathway 104 and the straight part 113a of the removal belt 113 positioned on the pathway 104 side contacts the lower surface of the empty bobbin 105 loaded on the tray 101 being transported along the pathway 104. Furthermore, from the above state, due to extension of the piston rod 108a by operation of the cylinder 108, the support frame 106 rotates in a clockwise direction about the vertical shaft 107 as in Figure 6 and the straight part 113a of the removal belt 113 positioned on the pathway 104 side moves away from the bobbin 105 loaded on the tray 101 being transported along the pathway 104.
114 is a flat, approximately square bobbin receptor arranged on the side opposite the pulley 110 which is attached to the drive shaft 109a of the motor 109. A vertical wall 114b lower than the height of the peg 101b of the tray 101 is formed on the downstream half of the area 114a of the bobbin receptor 114 running along the pathway 104 (The transport direction of the tray 101 is called downstream and the opposite direction to the transport direction of the tray 101 is called upstream. Accordingly, for example in Figure 6, the movement toward the left being the transport direction is downstream and the movement to the right is upstream.).
Furthermore, a vertical wall 114f slightly higher than the height of the peg 101b of the tray 101 is arranged on the area 114d positioned upstream and at right angles to the aforementioned area 114a. Vertical walls are not formed at area 114g which is positioned downstream and at right angles to the aforementioned area 114a. It should be noted that, as necessary, 114h is an extension part comprising an extension of the area 114a of the bobbin receptor 114 upstream along the pathway 104.
115 is a roller on which is supported one return part of the continuous belt conveyor (bobbin ejection means) 116. The load surface 116a of the continuous belt conveyor 116 is arranged so that it is roughly the same height as the upper surface of the bobbin receptor 114. Furthermore, the continuous belt conveyor 116 is positioned roughly parallel with the straight part 113a of the removal belt 113 positioned to the side of the pathway 104 in the aforementioned empty bobbin 105 removal position. 117a, 117b are guide walls arranged on both sides of the continuous belt conveyor 116. The guide wall 117b extends as far as area 114c of the bobbin receptor 114.
118 is an air blowing part that guides the bobbin 105 removed from the tray 101 onto the continuous belt conveyor 116. The air blowing part 118 comprises a nozzle 119a that blows air and a pipe 119b and the pipe 119b is linked to a compressor (not shown in the drawings). The air blowing part 118 is positioned on the side opposite the bobbin receptor 114 where it does not obstruct bobbin transport with pathway 104 inbetween, is positioned above the motor 109 and is fixed to a member (not shown in the drawings). The nozzle 119a of the air blowing part 118 is positioned behind the bobbin 105 along a line joining the position of the continuous belt conveyor 116 with the position of the bobbin 105 when removed from the tray 101 and faces towards the continuous belt conveyor 116. The nozzle 119a of the air blowing part 118 is positioned higher than the center of gravity of the bobbin 105 when removed from the tray 101, in short, at a height being the height of the center of gravity from the lower end of the bobbin 105 added to the height of the peg 101b of the tray 101. The air blowing force from the air blowing part 118 is controlled by a control system (not shown in the drawings) arranged on the nozzle 119a or a compressor (not shown in the drawings) linked to the pipe 119b. It should be stated that the height of the air blowing part 118 may be adjusted and set depending on the height of the bobbin 105.
Next, the empty bobbin removal operations of the bobbin removal device having the above structure will be described.
Firstly, the cylinder 108 is appropriately controlled so that the straight part 113a of the removal belt 113 positioned on the side of the pathway 104 his approximately parallel width the pathway 104 and moreover, so that the lower surface of the empty bobbin 105 loaded on the tray 101 being transported along the pathway 104 contacts the straight part 113a of the removal belt 113 positioned on the side of the pathway 104. From this state, while the tray 101 is being guided by the horizontal guide boards 103a, 103b, when the lower surface of the empty bobbin 105 loaded on the tray 101 contacts the straight part 113a of the removal belt 113 positioned on thee side of the pathway 104, the empty bobbin 105 in contact with the removal belt 113 is gradually lifted up and removed from the peg 101b of the tray 101 due to, as previously mentioned, the removal belt 113 is arranged inclining upwards facing in the transport direction of the tray 101 and the straight part 113a of the removal belt 113 positioned on the side of the pathway 104 runs in the same direction as the transport direction of the tray 101 and moreover, runs faster than the transport speed of the tray 101.
The empty bobbin 105 loaded on the tray 101 is detected by a sensor (not shown in the drawings) immediately before being removed by the removal belt 113 and an air current is blown from the nozzle 119a of the air blowing part 118. The force of the blown air is exerted on the upper part of the empty bobbin 105 which is higher than it's center of gravity and towards the continuous belt conveyor 116 from the side behind the empty bobbin 105 positioned on a line between the continuous belt conveyor 116 and the position of the removed empty bobbin 105. Accordingly, the empty bobbin 105 falls towards the continuous belt conveyor 116. The air blowing force is controlled to a desired amount of blown air so that the empty bobbin 105 reliably falls towards the continuous belt conveyor 116.
As explained above, the top part of the empty bobbin 105 removed from the peg 101b of the tray 101 by the removal belt 113 is pushed over towards the continuous belt conveyor 116 due to the effects of the blown air of the air blowing part 118 on a part of the empty bobbin 105 higher than the center of gravity as a force acting in the direction of the bobbin ejection means. Due to this, the empty bobbin 105 can be reliably loaded on the continuous belt conveyor 116 and transported in the desired direction such as to a spinning frame or the like.
It should be stated that the vertical wall 114f of the bobbin receptor 114 and the vertical wall 117b of the area 114c are positioned high enough so that the empty bobbin 105 of which the top part is pushed toward the continuous belt conveyor 116 does not fly over. Due to this, the empty bobbin 105 is prevented from jumping over the vertical wall 114f, 117b or from falling from the bobbin receptor 114. Furthermore, as a vertical wall 114b lower than the height of the peg 101b of the tray 101 is arranged on the downstream half of the area 114a of the bobbin receptor 114 which is alongside the pathway 104, the empty bobbin 105 removed from the peg 101b of the tray 101 and which drops onto the bobbin receptor 114 is prevented from moving in the direction of the pathway 104 by the vertical wall 114b even if it wants toe and as a consequence, no empty bobbins 105 fall from the bobbin receptor 114. If the height of the vertical wall 114b is made higher than the peg 101b of the tray 101, the lower part of the empty bobbin 105 removed from the peg 101b of the tray 101 contacts the vertical wall 114b and trouble such as the empty bobbin 105 falling from the bobbin receptor 114 occurs. It should be noted that it is not necessary to arrange the vertical walls 114b, 114f and the vertical wall 117b of the area 114c if the bobbin 105 does not fall from the bobbin receptor.
When the bobbin 105 loaded on the tray 101 is a full package or has some yarn remaining, the full package or remaining yarn of the bobbin 105 is detected by a detection device (not shown in the drawings), the cylinder 108 is operated due to a detection signal from the detection device, the support frame 106 is rotated about the vertical shaft 107 in a clockwise direction as shown in Figure 6 due to the extension of the piston rod 108a and the removal belt 113 is retracted from the bobbin 105 loaded on the tray 101 being transported along the pathway 104. Thus in this way, when the bobbin 105 loaded on the tray 101 is a full package or has yarn remaining, it is made to bypass the bobbin removal device and is returned once again to the automatic winder.
It should be stated that the, on the aforementioned embodiment, the case where the removed bobbin is an empty bobbin is described but the present invention can be similarly applied to a case where yarn remains on the bobbin by a slight reconsideration of the amount of air blown.
Furthermore, on the aforementioned embodiment, a case is shown where the blowing of air is applied as a non-contact means for transferring the removed bobbin to the bobbin transport means. However, the present invention can be similarly applied to a case where, for example, a non-contact means is applied for transferring the removed bobbin to the bobbin transport means by magnetic repulsion such as with the arrangement of a permanent magnet in the bobbin and an electromagnet in place of the aforementioned air blowing part.
Yet further, transferral of a bobbin incorporating a magnet to the bobbin ejection means by pulling it due to magnetic,force and the arrangement of a magnet in the side of the bobbin ejection means is also possible.
Yet further still, the aforementioned embodiment shows the blowing of air being a gas as an example but it is possible to similarly apply the present invention to a fluid such as a volatile fluid, that is not detrimental to the yarn, i.e. does not dirty it.
Due to the structure described above, the present invention demonstrates the following effects.
By a simple structure involving the arrangement of a removal belt sloping upwards in the transportation direction of the tray, an empty bobbin can be reliably removed from a tray and a bobbin removal device can be made more compact.
Further, when a bobbin is removed from the peg of the tray, the bobbin is smoothly removed without entanglement caused by bobbin guides.
Yet further, due to the contact with the top part of the bobbin and the arrangement of a guide member that guides the bobbin to the bobbin ejection means by the force of the removal belt, the empty bobbin can be removed from the tray in a stable state.
Yet further still, as the removal belt is arranged so as to project into the tray pathway, the empty bobbin can be removed while discriminating full bobbins or bobbins with residual yarn.
Furthermore, the present invention has a simple structure, is compact, has no need for the arrangement of a member to grasp the top part of the bobbin or the like and can stably transfer the removed bobbin to the bobbin ejection means. Also, there is no need to use force to contact the bobbin and transfer the bobbin to the bobbin ejection means. The removed bobbin can be transferred to the bobbin ejection means regardless of the strength of the belt or amount of friction between the contact surfaces of each bobbin and gripping device on conventional devices.
Even a bobbin with yarn remaining can be stably transferred to the bobbin ejection means.
Further, the transfer force of the bobbin can be simply controlled by controlling the amount of blown air which differs greatly to the control of the friction between the bobbin and the bobbin gripping device which has proved extremely difficult. Due to this, control of the force that pushes the bobbin onto the bobbin ejection means can be easily carried out.
Yet further, no attention needs to be paid to the balance of, for example, the application force or friction between the top part of the bobbin and the gripping device. As the force acting towards the bobbin ejection means acts on the part of the bobbin which is higher than the center of gravity, the top part of the bobbin can be reliably pushed towards the bobbin ejection means. Due to this, the occurrence of problems such as the top part of the bobbin not falling towards the bobbin ejection means due to defects in the balance of the force moving the bobbin can be prevented.

Claims

A bobbin removal device for removing bobbins from a tray being transported comprising:
a removal belt that contacts the bobbin on the tray and employs a force on that bobbin in the transportation direction and moreover which seperates it from that tray.
A bobbin removal device as in claim 1, wherein the belt is contacted with the lower part of the bobbin into which the peg of the tray is inserted.
A bobbin removal device as in claims 1 or 2, wherein a guide member is arranged that contacts the top part of the aforementioned bobbin and guides the bobbin to a bobbin ejection means by the force of the removal belt.
A bobbin removal device as in one of claims 1 through 3, wherein the aforementioned removal belt is arranged so as to be freely projectable into the tray pathway.
A bobbin removal device as in claims 1 or 2, comprising the arrangement of a means for transferring a bobbin removed from a tray to a bobbin ejection means without contacting that bobbin.
A bobbin removal device as in claim 5, comprising the arrangement of an air blowing part as a means for transferring the bobbin to the bobbin ejection means, that exerts a force toward the bobbin ejection means.
A bobbin removal device as in claim 6, wherein the force acting toward the bobbin ejection means acts upon a part of that bobbin removed from the tray higher than the center of gravity of the bobbin.