JPS627649Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bobbin gripping tool. More specifically, the present invention relates to a bobbin gripping tool that is used in the tube changing device of the present invention and grips the head of an empty bobbin or a fully loaded bobbin from the outside.

A bobbin gripping tool is widely known in which a through hole for inserting the bobbin head is formed in the body of the bobbin gripping tool, and the bobbin head inserted into the through hole is gripped from the outside by a gripping piece operated by fluid pressure. (For example, see Japanese Utility Model Publication No. 13825/1983).

If such a bobbin gripping tool is attached to a dotting bar of a tube changer and used to don an empty bobbin or doff a full bobbin to a spinning machine or a yarn twisting machine, the following problems may occur.
For example, when splicing yarn on a spinning machine or a yarn twisting machine, if the operator does not insert the bobbin sufficiently to the base of the spindle and the bobbin is slightly floating, the bobbin gripping tool should be held steady when doffing after winding. When the floating bobbin descends a distance, the bobbin head of the floating bobbin enters into the bobbin head insertion hole of the bobbin gripping tool excessively, and the bobbin is gripped at a point where the diameter is larger than the designed position. Become. Therefore, even if an attempt is made to release the bobbin by retracting the gripping piece of the bobbin gripper, the bobbin will not be released. If the bobbin gripper operates while gripping the bobbin in this way, it will damage peripheral equipment, empty bobbins, and fully wound bobbins. A similar problem may occur if the empty bobbin is not fully attached to the peg because the peg protruding from the bobbin conveyor is deformed or fluff is attached to the peg. In this case as well, the bobbin is floating, and the bobbin head is excessively fitted into the bobbin head insertion hole of the bobbin gripper, and the bobbin is not released when it should be released, causing peripheral equipment, empty bobbins, etc. Otherwise, the fully wound bobbin will be damaged.

An object of the present invention is to eliminate the inconveniences associated with the above-mentioned conventional bobbin gripping tools. More specifically, for floating bobbins, this prevents the bobbin from fitting excessively into the head of the bobbin gripping tool and being gripped by the large diameter portion, and ensures that the bobbin is released from the bobbin gripping tool when the bobbin is released. The purpose is to prevent damage to peripheral equipment and empty bobbins.
In the present invention, the bobbin grip main body is provided with a through hole for inserting the bobbin head, and a fixed head holding member that abuts against the inserted bobbin head is positioned above the through hole and aligned with the axis of the through hole. This is achieved by a bobbin gripping device characterized in that it is provided within a range not exceeding .

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, a bobbin gripping tool 1 includes a bobbin gripping tool main body 3 that is screwed onto a dotting bar (not shown) of a pipe changing device. The bobbin grip main body 3 has a through hole 3a for inserting the bobbin head, and
For example, it incorporates a grip piece opening/closing mechanism (not shown) as described in Japanese Utility Model Publication No. 12825/1983. A bobbin head holding member 5 extends from the bobbin grip main body 3 to above the bobbin head insertion through hole 3a.
Here, the width W of the bobbin head holding member 5 is made slightly smaller than the diameter d of the bobbin head insertion through hole 3a, and the tip of the bobbin head holding member 5 is aligned with the axis of the bobbin head insertion through hole 3a. It is preferable not to exceed A. The lower surface of the bobbin head holding member 5 is positioned above the upper surface of the bobbin gripper main body 3 by a predetermined distance l, so that the head of the bobbin is likely to protrude from the bobbin gripper main body beyond the predetermined distance l as described later. At other times, the bobbin head is brought into contact with the bobbin head pressing member 5.

In Fig. 2, the peg 9 of the bobbin conveyor 7 is shown.
2 shows a state in which an empty bobbin 11 mounted on a bobbin is being held by the bobbin holding tool according to the present invention. When the empty bobbin 11 is normally attached to the peg 9 as shown by the solid line, the bobbin gripping tool 1 descends and the head of the bobbin 11 passes through the bobbin head insertion through hole 3a, and the bobbin 11 A slight gap is created between the through holes 3a. In this case, the above-mentioned distance l is set so that the bobbin head pressing member 5 and the bobbin 11 do not contact at all or contact only very lightly. Next, in this state, remove the bobbin gripping piece (not shown).
By protruding the bobbin 11, the bobbin 11 is gripped.
The bobbin 11 is quickly detached from the bobbin gripper 1 by gripping the bobbin 11 in the bobbin gripper 1, moving the bobbin gripper to a predetermined position together with the bobbin gripper, and then retracting the bobbin gripping piece.

Next, when the bobbin 11 is mounted floating above the peg 9 as shown by the dashed line for some reason, in the conventional bobbin gripping tool that does not include a bobbin head holding member, the bobbin head is inserted into the bobbin head. It is fitted into the through-hole over an excessive length, resulting in a tight fitting state. Therefore, even if the bobbin gripping piece is moved back, the bobbin is not released, resulting in the above-mentioned inconvenience. However, in the present invention, since the bobbin head holding member 5 faces above the bobbin head insertion through hole 3a, the bobbin head excessively protrudes from the bobbin grip main body beyond the above-mentioned distance l. When the bobbin head presser member 5 is about to release the bobbin 1,
1's head will be held down. Therefore, the bobbin is prevented from tightly fitting into the bobbin head insertion through-hole of the bobbin gripper main body 3. Therefore, the inconveniences associated with conventional bobbin grippers are eliminated.

The preferable shape of the width W and the position of the tip of the bobbin head holding member 5 has been described above, and the reason thereof is as follows. When attaching the bobbin gripper to the dotting bar of the pipe changing device, it is necessary to align the bobbin gripper and the bobbin attached to the spindle of the machine stand or the peg of the bobbin transport conveyor, and to adjust the height of the bobbin gripper relative to the bobbin. There is. By the way, by setting the tip of the bobbin head holding member 5 so that it does not exceed the axis A of the bobbin head insertion through hole 3a, the bobbin head can be seen from above as shown in FIG. The centering of the gripping tool can be easily performed. Further, although the bobbin transport conveyor is normally positioned by a mechanical stop piece, the stop piece can be finely adjusted while checking the alignment between the bobbin and the bobbin gripper. Furthermore, since the upper surface of the bobbin gripper main body 3 and the bobbin head holding member 5 are transparent as shown in FIG. 2, the height of the bobbin gripper 1 relative to the head of the bobbin 11 can be easily adjusted.

In the embodiment described above, the bobbin head holding member is formed to protrude from the bobbin gripping tool body, but the fourth
As shown in the figure, a separately formed bobbin head holding member 15 may be fixed to the bobbin gripper main body or dotting bar 13 with bolts 17. FIG. 4 shows a state in which a fully wound bobbin 21 mounted on a spindle 19 of a spinning machine, a yarn twisting machine, etc. is gripped and doffed by a bobbin gripper 1 fixedly arranged on a dotting bar 13 of a tube changing device.

According to the present invention, the bobbin head is prevented from tightly fitting into the bobbin head insertion through hole of the bobbin gripping tool, and the bobbin can be reliably released when the bobbin is released. Therefore, the tube changing operation by the tube changing device can be performed smoothly and safely without damaging peripheral equipment or bobbins.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the bobbin gripping tool of the present invention;
The figures are a front view of the bobbin gripper shown in FIG. 1 in use, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a front view of another bobbin gripper of the present invention. 1...Bobbin gripper, 3...Bobbin gripper main body, 3a...Through hole for bobbin insertion, 5, 15...
Bobbin head holding member.

Claims (1)

[Scope of utility model registration request] The bobbin grip main body is provided with a through hole for inserting the bobbin head, and a fixed head holding member that abuts against the inserted bobbin head is provided above the through hole in a range that does not exceed the axis of the through hole. A bobbin gripping tool characterized by: