JPS6245013Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention involves winding and measuring the length of the weft supplied from the weft supply section, and once winding and storing the measured weft, and when inserting the weft, the wound and stored weft is The present invention relates to a weft length measuring device for a loom that is adapted to draw out a weft thread.

Prior Art In general, shuttleless looms, particularly fluid jet looms, are equipped with a weft length measuring device that measures the length of the weft for one weft insertion in advance and temporarily stores the measured weft. ing. This type of weft length measuring device measures the length of the weft supplied from the weft supply section by winding it, temporarily winding and storing the measured weft, and then pulling out the wound and stored weft when inserting the weft. A weft length measuring device has been proposed.

The outline of this winding type weft length measuring device will be explained based on FIG. has been done. 3 is a support arm fixed to the upper part of the bracket 1, and has a hanging arm 3a facing the bracket 1. Reference numeral 4 denotes a rotary support shaft that is rotatably mounted through the bracket 1 and the hanging arm 3a, and a weft guide hole 4a that guides the weft Y supplied from a weft supply unit (not shown) such as cheese is connected to the rotation support shaft 4. It is provided along the axis. 5 is a toothed pulley fixed to the support shaft 4, and 6 is a timing belt hung around the pulley 5, which is driven in synchronization with the weaving operation and rotates the rotary support shaft 4. .

Reference numeral 7 indicates a support member located in front of the gear 1b (on the right side in FIG. 1) and is fixed to the rotation support shaft 4, and reference numeral 8 indicates a wrapping arm supported by the support member 7 obliquely to the support shaft 4. The tip thereof has an opening 8b on a first tapered circumferential surface 10a of the drum 10, which will be described later, and a weft guide passage 8a formed inside the opening 8b communicates with the weft guide hole 4a. Reference numeral 9 denotes a bracket which is attached to the front side of the support body 7 so as to be rotatable relative to the support shaft 4. A gear 9a is integrally formed on the circumferential surface of the bracket, and a weft thread is attached to the front surface of the bracket. A drum 10 serving as a length measuring member is fixed to the support shaft 4 so as to be relatively rotatable. 11 is a planetary gear mechanism fixed to the support 7,
An input planetary gear 13 fixed to one end of the shaft 12 is meshed with the gear 1b, and an output planetary gear 14 fixed to the other end of the shaft 12 is meshed with the gear 9a. Further, the ratio of the number of teeth between the gear 1b and the input planetary gear 13 is set to be the same as the ratio of the number of teeth between the gear 9a and the output planetary gear 14. Therefore, when the timing belt 6 is driven and the rotation support shaft 4 is rotated, the winding arm 8 rotates together with the support shaft 4, and the planetary gear mechanism 11 also rotates together, and both planetary gears 13 , 14 revolve around the support shaft 4 while meshing with the gears 1b and 9a, and the drum 10 is held stationary without rotating.

15 is a first locking pin for weft length measurement that is located on the first tapered circumferential surface 10a of the drum 10 and retracts; 16;
is a second locking pin for weft storage that is located on the second tapered circumferential surface 10b of the drum 10 and retracts. (which are moved in and out by a mechanism or a crank mechanism, etc.), and their tips are each formed into a hemispherical shape.

17 denotes a flange portion 18 and a second tapered peripheral surface 10b
A plurality of weft winding amount adjusting rods (only one is shown in the drawing) are disposed as weft length measuring units between the drum 10 and the rotary support shaft 4. The rods are located below the drum 10 and are arranged radially around the rotary support shaft 4.
Each rod 1 is adjustable in the radial direction of the
The roller 7 forms a substantially circular circumference together with the drum 10 and comprises a first inclined portion 17a corresponding to the first tapered peripheral surface 10a of the drum 10 and a second inclined portion 17b corresponding to the second tapered peripheral surface 10b.

Now, when the timing belt 6 is driven in synchronization with the weaving operation and the winding arm 8 rotates around the stationary drum 10, the weft guide hole 4a, weft guide passage 8a and opening 8b are opened from the weft supply section. The weft yarn Y fed through the weft thread is wound around the first tapered circumferential surface 10a and the first inclined portion 17a and its length is measured while being locked by the first locking pin 15 in a protruding state. When the weft Y is wound and measured by the length of one weft insertion, the first locking pin 15 sinks into the drum 10, and the weft Y whose length has been wound and measured is attached to the first tapered circumferential surface 10.
a and the first inclined portion 17a to the second tapered peripheral surface 10
b and the second inclined portion 17b. And the second
The weft yarn Y that has moved to the tapered circumferential surface 10b and the second inclined portion 17b is locked by the second locking pin 16 in a protruding state, and is once wound on the second tapered circumferential surface 10b and the second inclined portion 17b. stored.

This wrapped and stored weft Y is attached to the second locking pin 16
When the weft is inserted in synchronization with the weft insertion timing, it is pulled out from the drum 10 and the weft is inserted.

By the way, the weft Y whose length is measured after being wound a plurality of times around the first tapered circumferential surface 10a and the first inclined portion 17a.
moves to the second tapered peripheral surface 10b and the second inclined portion 17b as the first locking pin 15 retracts,
When the hemispherical tip of the first locking pin 15 begins to sink, the weft yarn Y whose length has been wound and measured begins to move.
At this time, due to the inclination of the first tapered circumferential surface 10a, there was a risk that the rear weft of the weft Y whose length was wound and measured would jump over the front weft.

In addition, the weft yarn Y whose length has been wound and measured is attached to the first locking pin 15
It moves to the weft insertion side while sliding the tip surface of the
In the conventional first locking pin 15 whose tip surface is formed into a hemispherical shape, the same weft thread Y extends from near the apex of the hemispherical tip surface of the first locking pin 15 to the second tapered circumferential surface 1.
0b and the second inclined portion 17b. Therefore, the flight distance of the weft yarn Y increases,
Among the weft yarns Y wound multiple times, a phenomenon occurred in which the rear weft yarn jumped over the front weft yarn.

Therefore, the weft yarns Y whose lengths have been wound are entangled with each other, and in this state, the second tapered circumferential surface 10b and the second
It is wound and stored on the inclined portion 17b. Therefore, when the second locking pin 16 is depressed and the wound and stored weft yarn Y is inserted, the weft yarn Y is not pulled out smoothly, and there is a fear that a weft insertion error may be induced. Note that this problem is not limited to the weft length measuring device in which the locking pins 15 and 16 are housed in the drum 10;
The weft is wound and stored using a weft length measuring device which is arranged outside the drum 10 and moves in and out of the weft winding length measuring section and a single locking pin. A similar problem occurs in the weft length measuring device.

Purpose This invention was made to eliminate the above-mentioned defect, and its purpose is to
A weft engaging surface that is substantially perpendicular to the protruding direction of the locking pin is provided on the winding length measuring side, and a weft locking portion that continues to the engaging surface is provided on the weft insertion side of the engaging surface. Therefore, it is an object of the present invention to provide a weft length measuring device for a loom, which can smoothly pull out a wound and stored weft during weft insertion.

Embodiment Hereinafter, an embodiment embodying the present invention will be described based on FIGS. 2 to 4 while referring to FIG. 1.
Since the winding type weft length measuring device has the same structure as the conventional structure described above, a description of the structure of the device will be omitted.

Now, the first tapered circumferential surface 10 as a winding length measuring section
A weft engagement surface 15a is provided on the winding length measurement side of the tip of the cylindrical first locking pin 15 that appears and retracts at point a, and is substantially orthogonal to the protruding direction of the first locking pin 15. At the same time, on the weft insertion side of the engaging surface 15a, there is a vertical surface 15b that continues from the engaging surface 15a, and a first locking pin 15 protrudes continuing from the vertical surface 15b and toward the weft insertion side. Inclined surface 1 extending in the direction
5c is provided. Note that the end surface of the cylindrical second locking pin 16 has a hemispherical shape as before.

As shown in FIG. 2, the weft yarn Y supplied from the weft supply section (not shown) is stopped by the first locking pin 15 while passing through the first tapered circumferential surface 10a and the winding length measuring section. 1 and the length is measured around the inclined portion 17a. The first locking pin 15 begins to retract, and the first locking pin 15
When the engaging surface 15a starts to sink into the first tapered circumferential surface 10a, the weft yarn Y whose length has been wrapped and measured gradually transfers to the weft engaging surface 15a from the front side, as shown in FIG. The engaging surface 15 is locked to the vertical surface 15b.
Arrange them in an orderly manner on a. Therefore, unlike in the case of a conventional locking pin having a hemispherical end surface, when the weft yarn Y whose length has been wrapped and measured begins to move toward the weft insertion side, the rear weft yarn Y is connected to the front weft yarn. There is no risk of jumping over Y.

When the vertical surface 15b begins to sink, the weft Y whose length has been wound and measured by the vertical surface 15b continues to be locked, but the weft Y remains in the engagement surface 15a until the vertical surface 15b sinks. Retain the state in which they were lined up above. Then, when the inclined surface 15c begins to retract, the weft yarn Y whose length has been wound and measured moves toward the weft insertion side while being stopped by the inclined surface 15c. 15c to the second tapered circumferential surface 10b and the second inclined part 17 as the winding storage part. That is, the weft yarn Y whose length has been wrapped and measured is moved to the weft insertion side while slidingly contacting the engaging surface 15a, the vertical surface 15b, and the inclined surface 15c until the first locking pin 15 is just about to retract, and the weft Y on the front side is sequentially moved From Y to the second tapered peripheral surface 10b and the second inclined portion 17
Moving on to b.

Furthermore, even when the retraction speed of the first locking pin 15 is fast and the entire weft yarn Y moves from the inclined surface 15c to the second tapered circumferential surface 10b and the second inclined portion 17b almost simultaneously, the conventional hemispherical shape Unlike the case of a locking pin having a tip surface, the flight distance of the same weft Y is shorter, and the closer the weft Y is to the front, the more strongly the weft Y is pulled toward the inserting side. It quickly moves to the second inclined portion 17b.

Therefore, as shown in FIG. 4, the weft yarn Y whose length has been wound is wound and stored in an orderly manner without intertwining with each other, and at the time of weft insertion, the second locking pin 16 is retracted and the weft yarn Y which has been wound and stored is is pulled out smoothly.

Note that the present invention is not limited to the above-mentioned embodiments, and can be modified and embodied as follows, for example.

(1) The present invention is applicable not only to the first locking pin 15 but also to the second locking pin 15.
This should also be applied to the locking pin 16.

(2) The present invention is embodied in a plurality of first locking pins 15 arranged on the winding length measuring portion such as the first tapered circumferential surface 10a.

(3) The present invention is embodied in a plurality of second locking pins 16 arranged on the winding length measuring portion such as the second tapered circumferential surface 10b.

(4) The width of the weft engagement surface 15a is appropriately changed within a range where the entire weft yarn Y whose length has been wound and measured can be aligned in parallel.

(5) Attach the tips of the locking pins 15 and 16 to Fig. 5 a, b,
Shape shown in c and d.

FIG. 5a shows the weft engaging surface 15a and the vertical surface 15.
b, a hemispherical surface, and 5th b, c, d
Both are the weft engagement surface 15a and the inclined surface 15d.
It is made up of.

(6) As the locking pins 15 and 16, a cylindrical or rectangular member or a thin plate-like member may be used in addition to the above-mentioned columnar shape.

(7) The present invention is embodied in a weft length measuring device in which a winding length measuring section and a winding storage section are formed using only the drum 10.

(8) The present invention is embodied in a weft length measuring device in which a winding length measuring section and a winding storage section are formed using only the rod 17.

(9) To be embodied in a locking pin disposed on the outside of the drum 10.

(10) To be embodied in a weft length measuring device that measures and stores the weft length using a single locking pin.

(11) To be embodied in a mechanically, fluidically or electromagnetically actuated locking pin.

Effects As detailed above, the present invention provides a weft engagement surface on the winding length measurement side of the tip of the locking pin, which is approximately perpendicular to the protruding direction of the locking pin, and
By providing a weft locking part that follows the weft insertion side of the engagement surface, it has the effect of smoothly pulling out the weft that has been wrapped and stored during weft insertion, making it possible to measure the weft length on the loom. This is an excellent idea for industrial use as a device.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a winding type weft length measuring device, Figs. 2 to 4 are side views of main parts explaining the operation of an embodiment embodying the present invention, and Figs. 5 a, b, and c. ，
d is a partial side view of a locking pin showing another example of the present invention. Wrapping arm...8, drum...10, first tapered circumferential surface...10a, second tapered circumferential surface...10b,
First locking pin...15, Engaging surface...15a, Vertical surface...15b, Inclined surface...15c, Second locking pin...16, Rod...17, First slope...17
a. Second slope portion...17b.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. During operation of the loom, the weft supplied from the weft supply section is wound around the winding length measuring section of the weft length measuring section, and the locking pin releases the weft at the time of weft insertion. In a weft length measuring device, a locking pin locks the weft and stops pulling out the weft when the weft insertion is completed. A loom characterized in that a weft engaging surface is provided substantially perpendicular to the protruding direction of the locking pin, and a weft locking portion continuing to the engaging surface is provided on the weft insertion side of the engaging surface. Weft length measuring device. 2. The weft locking portion is a vertical surface that continues to the weft engaging surface and an inclined surface that continues to the vertical surface and extends in the direction in which the locking pin protrudes toward the weft insertion side. A weft length measuring device for a loom according to scope 1. 3. The weft length measuring device for a loom according to claim 1, wherein the weft locking portion is an inclined surface extending in the protruding direction of the locking pin as it goes toward the weft insertion side.