JPH0116775Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of application) The present invention relates to a coupling device for a spinning machine dotting bar equipped with a simultaneous all-spindle pipe exchange device.More specifically, the invention relates to a coupling device for a dotting bar of a spinning machine that is equipped with a simultaneous pipe exchange device for all spindles. The present invention relates to an improvement of a joint device that simplifies the assembly work when a plurality of doffing bars each having a bobbin gripper attached thereto are successively connected and assembled along the longitudinal direction of the machine.

(Prior art and its problems) In a spinning machine, when replacing a full yarn formed on a bobbin attached to a spindle with an empty wood tube waiting at the front lower part of the machine stand, the bobbin is removed from the spindle or In order to attach the empty wood pipe to the spindle, it is necessary to capture the bobbin.

In this case, a bobbin gripper was used to grip the bobbin, which was made of an elastic bag body that gripped the bobbin by expanding when charged with pressurized air, and released the bobbin by discharging the air. There is something. This bobbin gripping tool
Usually 10 to 20 dotting bars are attached to a single hollow pipe-shaped dotting bar that serves as a passage for pressurized air, and dozens of these dotting bars are connected along the longitudinal direction of the spinning machine and arranged according to the number of spinning machine spindles. There is a device that is installed and used as an all-spindle simultaneous tube exchange device. When connecting multiple dotting bars to which these bobbin grippers are attached sequentially along the longitudinal direction of the machine, they are attached using a coupling device so that the axis of each bobbin gripper and the axis of each spindle match. There is a need. Conventionally, as a joint device for connecting a plurality of dotting bars, as shown in Fig. 2, an adhesive having a flange in the center is applied in advance between two dotting bars A and A' to which a bobbin gripper is attached. A joint B made of hollow rubber was used for connection. This dots flying bar A,
When aligning the bobbin gripping tool C attached to A' with the axis of the spindle, use the two dotting bars A,
A gap often occurs between the end of A' and the flange of the coupling device B. In this case, insert spacer packings D and D' of appropriate thickness between the end of the doffing bar and the flange of the joint to prevent air leakage from this gap, and then correct it by reassembling it. was. However, although this work is simple, if the spinning machine has 400 spindles, it is necessary to connect about 20 dotswing bars on each side, making it a complicated task for the workers. Furthermore, if the dotting bar or joint in the middle of the machine is damaged for some reason after assembly and needs to be replaced, with the structure described above, it will be necessary to remove it from the end of the machine. It was a long replacement work. Furthermore, since the joints and gaskets are coated with adhesive, it is almost impossible to reuse the joints that have been used once.Furthermore, since these joints and gaskets are made of rubber, they deteriorate over time and cannot be reused. It became impossible, and there were drawbacks such as the need for new joints and packing.

(Purpose) Therefore, the present invention aims to eliminate the above-mentioned drawbacks.The purpose of the present invention is to provide an appropriate method to eliminate gaps in the joint device in order to prevent leakage of pressurized air when connecting a dotting bar with a bobbin gripper attached. To simplify the work of assembling a dotting bar by omitting the selection of a spacer gasket of a suitable thickness and related work associated therewith, and by performing the centering work of the spindle and bobbin gripping tool without any consideration of the joints. To provide a joint device that uses a material that does not deteriorate over time for the joint, makes it possible to extremely easily attach and detach a successor device once assembled from a dotting bar, and thereby facilitates maintenance management. It is something.

(Example) Next, an example of a device for carrying out the present invention will be explained in detail with reference to the drawings.
is a dotting bar made of a hollow pipe made of light alloy and serving as a passage for pressurized air, and the dotting bar is equipped with a bobbin gripping tool 2 made of an elastic bag that expands when pressurized air is loaded at a pitch corresponding to the spindle of a spinning machine. 2' are attached to the inner surface of the hollow part at one end thereof, and a threaded part 1a,
1a' is provided. 3 is a female bushing that is screwed onto the end portion 1a of the dotting bar 1, and the bushing is made of a rigid body such as metal or plastic;
Its outer shape consists of a cylindrical protrusion with a thread cut on its outer circumferential surface, a flange larger than the outer circumferential surface of this protrusion, and its interior is hollow,
A groove 3a into which a rubber ring 4 to prevent air leakage is fitted is provided at one end of this hollow inner surface.
Reference numeral 5 designates a male bushing that is slidably inserted into the inner surface of the hollow part of the female bushing. A thread 5a is cut on the outer peripheral surface of the cylinder, and is screwed into the threaded part on the inner surface of the hollow part of the dotting bar 1'a, while the outer cylinder surface on the opposite side is inserted into the hollow part of the female bushing as described above. It is something. Here, the length a from the outer circumferential surface of the male bushing flange to the outer circumferential surface of the flange 3' of the female bushing 3 screwed onto the dotting bar 1 is the length b of the threaded portion of the end of the male bushing or the female bushing 3'. The length of the outer cylinder of the male bushing is set to be longer than the length c of the threaded part of the protruding part of the bushing.
Incidentally, reference numerals 6 and 6' designate rubber gaskets that prevent air from leaking from the threaded portions of the dotting bars 1 and 1' and the pair of female and male buns 3 and 5.

An example of a joint device implementing the present invention is constructed as described above. When assembling this pair of male and female bushes to a dotting bar, first fit the gasket 4 into the groove 3a on the inner surface of the hollow part of the female bush 3. In this state, the protrusion of the male bush 5 is inserted so that it can slide freely in the axial direction. On the other hand, dotting bars 1 and 1' are spindles of a spinning machine (not shown).
and the axis of the bobbin gripping tool 2 attached to the dotting bar are made to coincide with each other.
Next, a gasket 6 is sandwiched between the dotting bar 1 and the female bushing 3, and a tool is attached to the flange of the female bushing and rotated to screw the female bushing onto the dotting bar 1. On the other hand, the male bushing 5 also has a gasket 6' sandwiched between it and the dotting bar 1', and a tool is attached to the flange of the male bushing and rotated to be screwed into the dotting bar 1'. At this time, there is no need to consider the spacing between adjacent dotting bars 1 and 1' since the protrusion of the male bushing 5 is slidably inserted;
and 5 need only be screwed onto the dotting bars 1 and 1', respectively.

On the other hand, when taking out the male and female bushings 3, 5 from the dotting bars 1, 1', contrary to the above, a tool is attached to the collar of the male and female bushings 5 or 3 of the dotting bar 1' and rotated to release the screwing. Since the length a of the protruding portion of the male bush 5 is longer than the lengths b and c of the screwing portions, it can be easily removed.

The pressurized air passes through the hollow parts of the doffing bars 1, 1' and the male and female bushes 3, 5 of the coupling device, respectively, and is charged into the bobbin grippers 2, 2', respectively. At this time, the dotting bar 1,
Between 1' and male and female bushings 3 and 5, there is a packing 6,
6' is interposed, while female bush 3 and male bush 5
Since the gasket 4 is interposed between the two, air will not leak.

(Effects) As described above, the present invention has a pair of male and female bushes, which are movable in the axial direction by inserting the protruding part of the male bush into the hollow part of the female bush, and are screwed into the ends of the dotting bar, respectively. Since the dotting bars are connected using a conventional joint device, when connecting the dotting bars, not only can it be installed extremely easily without having to consider the selection of a spacer packing with an appropriate thickness for the joint, but it is also possible to connect the dotting bars with When replacing the dotswing bar for some reason after assembly, it is very easy to attach and detach the coupling, and since the coupling is made of a rigid body such as metal, there is no need to worry about deterioration over time, and its practical value is extremely effective. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing an example of a device implementing the present invention, and FIG. 2 is a sectional view of a main part showing an example of a conventional joint device. 1, 1'... dotting bar, 2, 2'... bobbin gripper, 3... female bushing, 5... male bushing.

Claims (1)

[Claims for Utility Model Registration] 1. Includes a bobbin gripper that uses pressurized air, and has a hollow portion that serves as a passage for the pressurized air. 2.
A dotting bar coupling device of a spinning machine all-spindle simultaneous pipe exchange device that connects two dotting bars, has a hollow part inside that serves as a passage for pressurized air, and its outer part is independently screwed into the hollow part of the dotting bars. The female bush has a flange at one end, while the male bush has a flange in the center, and a protrusion of the male bush is provided in the hollow part of the female bush. is inserted and slidably attached, and furthermore, at least the slidable length (a) of the male and female bushing protrusions is longer than the lengths (b) and (c) at which the male and female bushings are screwed into the dotting bar. A coupling device for the dotting bar of a spinning machine all-spindle pipe exchange device. 2. The dotting bar coupling device described in Paragraph 1 of the Utility Model Registration, in which the pair of male and female bushings are rigid bodies made of metal or synthetic resin.