JPH02452Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a selvedge forming device provided in a shuttleless loom that weaves by inserting weft threads cut to a certain length into the warp threads.

[Prior Art] As a selvage forming device installed in a shuttleless loom, Japanese Patent Application Laid-Open No. 71436/1983 discloses one in which four selvage threads are provided on each side of the warp threads. The device is installed on two adjacent first and second heald frames. Two needles are fixed to the heald bar of the first heddle frame with their tips facing each other through a metal plate, needle holes are made in the tips of the needles, and the second and third selvage threads from the end are attached to the needles. They are pulled out in parallel from the holes. A slider driving member is fixed to the heald bar of the second heald frame via a connecting member, and two upper and lower slots are formed in the slider driving member in a figure eight shape that opens at 90 degrees.
A slider is attached to the slider drive member so as to be able to slide up and down while being subjected to frictional braking, and the slider is provided with two slots, upper and lower, in a figure-eight shape that opens at an angle of 90 degrees. The first and fourth selvage yarns from the end are pulled out from the slider driving member and the upper and lower slots of the slider, respectively. Each time the weft is inserted, the first heald frame moves up or down, and the second heald frame moves up and down with respect to the first heddle frame. When the slider rises relative to the slider driving member, the upper and lower ends of the two upper slots overlap, and the other upper and lower ends of the lower two slots overlap.
During weaving, the first and fourth selvage threads are intertwined alternately from both sides with the weft yarn and the second and third selvage threads, which rise and fall for each weft thread, to form the selvage edge of the fabric.

[Problems to be solved by the invention] However, with the above device, the needles that pull out the second and third selvage threads tend to swing, and when the needles swing, the weft threads come off from the warp threads, causing damage to the structure of the selvage edges of the fabric. There was a problem with the cloth becoming untidy and fraying.

Also, if you cover both sides of the needle to protect it, it will be difficult to thread the selvage thread through the needle hole, and if you make the needle tip hook-shaped to make it easier to thread the selvage thread, the needle will be more likely to run out. There was a problem.

This invention was devised to solve these problems, and its purpose is to prevent the needle tip from wobbling during weaving, and to prevent needle holes from occurring even when the needle is protected from both sides. An object of the present invention is to provide an ear edge forming device through which a thread can be easily passed through.

[Means for Solving the Problems] In order to achieve the above object, the feature of the present invention is to form a selvage edge on one side of a fabric using four selvage threads. Two needles each having a needle hole through which the first and fourth selvage threads are passed are surrounded by side stays on both sides, and a slider drive member having slots through which the first and fourth selvage threads are passed is slidably attached to the side stays. , the slider drive member is provided with an inner needle receiving groove slightly larger than the outer diameter of the needle,
The reason for this is that needles with which the second and third selvage threads are in contact are fitted in the needle receiving groove to prevent needle deflection.

It is desirable that the needle be formed from a hollow cylindrical needle shaft and a hook-shaped needle tip, and that a needle hole be provided in a portion of the needle tip that projects outward from the center of the needle shaft to facilitate threading of the thread.

[Operation] The first and fourth selvage threads from the ends of the four selvage threads pass through the slots of the slider and slider driving member that overlap the needle front and back from both sides of the needle, but the upper and lower ends of the slots are on both sides of the needle. Since the two selvage threads move from the upper end to the lower end or from the lower end to the upper end of the slot each time the weft thread is inserted, contact between the two selvage threads and the needle is unavoidable. However, the needle that comes into contact with the two selvage threads fits into the U-shaped cross-sectional needle receiving groove of the slider drive member, and the inner width of the needle receiving groove is only slightly larger than the outer diameter of the needle, so the two selvage threads Even if the needle comes into contact with the needle, the deflection of the needle is regulated by the needle receiving groove, so no deflection of the needle occurs. Alternatively, the two selvage threads pull the needle tip toward the woven fabric and bend the needle, but since the groove width up to the opening is the same, even if the needle tip is bent toward the opening of the woven fabric, the needle will not bend. The tip can pass smoothly through the needle receiving groove. Needless to say, if the needle receiving groove is C-shaped with a narrow opening and the needle tip bends toward the fabric front, it becomes difficult for the needle tip to enter the needle receiving groove. Since the needle tip is separate from the needle shaft, it can also be made of ceramic, which has excellent wear resistance.

[Example] The apparatus of the present invention will be described based on an example shown in the drawings. As shown in FIGS. 2 and 3, a block 3 is attached to the first heald frame 1, and a block 4 is attached to the lower heald bar.
Attach two needles 7 and 8 vertically to the needle 4 so that their tips face each other in the center. Needle holes 5 and 6 are provided at the tips of the needles 7 and 8. Similarly, a pair of side stays 11 and 12 are attached to the blocks 3 and 4, and surround the needles 7 and 8 from both sides. A slider driving member 19 is vertically slidably attached to the side stays 11 and 12. The slider 18 is vertically slidably fitted inside the drive member 19. The side stay 11 is provided with a yarn feeding guide 13 for the selvedge yarn. A connecting member 25 is attached to the second heald frame 2, and cushion members 33 and 34 for holding the slider driving member 19 are attached to the tip of the connecting member.

The upper and lower ends of the slider drive member 19 are provided with protrusions 2
3 and 24 are provided, and their protruding portions fit into grooves inside the side stays 11 and 12 on both sides. The slider 18 is a top and bottom protrusion 2 of a slider driving member 19.
It is located between 3 and 24 and can slide up and down between them. Slider 18 and slider drive member 1
9 has eight-shaped slots 21 that open 90 degrees in opposite directions,
22, 27, and 28 are provided.

As shown in FIG. 1, the needles 7, 8 consist of hollow cylindrical needle shafts 71, 81 and ceramic needle tips 72, 82 with hook-shaped tips.
It is drilled in a part that protrudes from the axis of 3,83. The bases 74, 84 of the needle tips 72, 82 are connected to the needle shaft 7.
It is inserted into the shaft hole No. 1, 81 and fixed. Grooves 15 and 16 are provided inside the side stays 11 and 12, and the protrusion 2 of the slider drive member 19 is inserted into the grooves.
3 and 24 are slidably fitted. Slider 18 that fits between the upper and lower protrusions 23 and 24
Braking members 17 are provided on both sides of the side stays 11 and 12.
It moves up and down while making frictional contact with the inner surface of 16. When the slider 18 rises relative to the slider driving member 19, the inner ends of the slots 21 and 27 overlap, and the outer ends of the slots 22 and 29 overlap, and when the slider descends, the slots 21 and 27 overlap. The outer ends of the slots 27 overlap, and the inner ends of the slots 22 and 28 overlap. Upper and lower protrusions 2 of slider drive member 19
3, 24 have needle receiving grooves 90, 9 with a U-shaped cross section and an inner width slightly larger than the diameter of the needle shafts 71, 81.
0 is provided, and the needle 7 fits into the needle receiving groove.

The reason why the needle tip is made of ceramic is to prevent wear of the needle hole due to the passage of the selvage thread, and for the same reason, it is desirable that the slider and the slot of the slider driving member be made of ceramic as well. For example, the slider is made entirely of ceramic. As for the slider driving member, as shown in FIG. 6, the main body 19 is made of synthetic resin, a ceramic plate 19a is inserted into the main body from the side, and both are fixed with pins 19b. Slots 27a and 28a are formed in the ceramic plate 19a, and the slots 27 and 28 of the main body 19 that overlap the slots are inserted into the slots 27a and 28 of the ceramic plate.
The selvedge is made larger than 8a and the ceramic plate 19a
so that it contacts only the slots 27a and 28a.

All of the devices of this invention are applicable to shuttleless looms, but when used in water looms, the needles, side stays, connecting members, etc. should be made of non-rusting metal materials, as rusting will reduce the performance. It is desirable to use it.

During weaving, as the first heald frame 1 and the second heald frame 2 move up and down, the slide 18 reciprocates between a raised position and a lowered position relative to the slider drive member 19, as shown in FIGS. 4 and 5.

The selvage edge on one side of the fabric is formed by four selvage threads (warp threads), and the first and fourth selvage threads Y from the edge
1 and Y4 pass through the slots 21 and 22 of the slider 18 and the slots 27 and 28 of the drive member 19, and the second and third selvedge threads Y2 and Y3 in the center pass through the needle holes 5 and 6 of the needles 7 and 8. Therefore, each time weft insertion,
The second and third selvage yarns Y2 and Y3 repeat ups and downs for each weft W, but the first and fourth selvage yarns move up and down relative to the slider driving member 19 of the slider 18, and their mutual positions change. Since the weft W and the two selvage threads Y2 and Y3, which rise and fall one by one, are alternately crossed and intertwined to form the selvage edge.

At this time, if the needles 7 and 8 shake due to vibration, the weft W
However, in the device of the present invention, the needles are detached from the selvage threads Y2 and Y3 and the selvage edges are disturbed.
Since the inner width of the needle receiving groove is only slightly larger than the outer diameter of the needle shaft of the needle, deflection of the needle is restricted. The selvage threads Y2 and Y3 pull the needle tips toward the front side of the fabric, that is, the opening side of the needle receiving groove, thereby bending the needles 7 and 8. However, since the needle receiving grooves are deep and the inner widths are the same, the needle tips can be smoothly inserted into the needles. It can pass through the receiving groove.

In addition, since the needle holes 5 and 6 of the needles 7 and 8 of the device of the present invention are opened at the hook-shaped tip portions 73 and 83 that protrude outward, it is extremely easy to pass the selvage threads Y2 and Y3. Since the needle tips 72 and 82 are made of ceramic, they have good wear resistance. in this way,
The needles 7 and 8 of the present invention have hook-shaped needle tips and the needle holes 5 and 6 are off the needle center line, but as mentioned earlier, the needle guide groove 90 prevents runout during weaving. Ru.

[Effects of the invention] As mentioned above, the device of the present invention has two needles for pulling out the selvage thread in the needle receiving grooves with a U-shaped cross section to prevent the device from steadying. In comparison, this method has an exceptional effect in that the edges of the fabric are not disturbed by the wobbling of the needle. In addition, since the tip of the needle is hook-shaped and protrudes outward, and the needle hole is provided in the protruding part, the task of passing the selvage thread through the needle hole is easier than with conventional needles that have the needle hole on the center line. is easy. Since the needle tip and needle shaft are separate bodies, if the needle tip is made of ceramic, which has excellent wear resistance, the life of the entire needle can be extended.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the main parts of a device according to an embodiment of the present invention, FIGS. 2 and 3 are front and side views of the device shown in FIG. 1, and FIGS. 4 and 5 are FIG. 6 is an exploded perspective view of a slider driving member of another embodiment. In the figure, numeral 1 is the first heald frame, 2 is the second heald frame, 5 and 6 are needle holes, 7 and 8 are needles, 11 and 12 are side stays, 17 is a braking member, 18 is a slider, and 19 is a slider Driving member, 21 and 22 are slots, 23 and 24 are protrusions, 25 is a connection plate, 27 and 28 are slots, 71 and 81 are needle shafts,
Reference numerals 72 and 82 indicate needle tips, 73 and 83 indicate tip portions, and 90 indicates a needle receiving groove, respectively.

Claims (1)

[Claims for Utility Model Registration] 1. Adjacent first and second heald frames, and two needles arranged such that their needle tips face perpendicularly to the first heald frame directly or through their heald bars. and,
A needle hole provided at the tip of each needle, a pair of side stays provided directly on the first heald frame or via its heald bar so as to surround the needle from the left and right, and a pair of side stays that can be freely raised and lowered along the side stays. a slider attached to the side stay; a slider drive member that accommodates the slider between the upper and lower protrusions and is also attached to the side stay so as to be movable up and down;
a connecting member that connects the slider driving member to the second heald frame directly or via its heald bar;
The slider has two upper and lower eight-shaped slots that open at 90 degrees, and the slider drive member has two upper and lower eight-shaped slots that open at 90 degrees. When the slider is in the raised position with respect to the slider driving member, the slider and the upper and lower slots of the slider driving member overlap at one left and right end, and the other slot overlaps at the other end, and the slider and the slider driving member are in the lowered position. In some cases, the setting is reversed, and two of the four selvage threads on both sides are passed through the slot, and the two middle threads are passed through the needle hole. forming needle receiving grooves with a U-shaped cross section and a groove width slightly larger than the outer diameter of the needle in the upper and lower protrusions of the driving member;
A groove is provided inside the side stay to slidably fit the side part of the protrusion, the upper surface of the protrusion is made to protrude from the upper surface of the side stay to deepen the needle receiving groove, and the needle is inserted into the needle receiver. The needle is made of a hollow cylindrical needle shaft and a hook-shaped tip portion into which the base is inserted and fixed into the needle shaft, and the needle hole projects outward from the center line of the needle shaft. A selvedge forming device for a shuttleless loom, characterized in that the selvedge forming device is provided at the tip of the loom. 2. The selvage forming device for a shuttleless loom according to claim 1, wherein at least a portion of the needle hole and the slot through which the selvage thread passes are made of ceramic. 3. The edge forming device for a shuttleless loom according to claim 1, wherein the needle, side stay, and connecting member are made of rust-free metal materials.