JPH0444633Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention is a three-dimensional loom that weaves three-dimensional fabrics that are three-dimensionally organized by three-component threads: warp, weft, and vertical threads. This invention relates to a shedding device that opens warp yarns two-dimensionally.

(Prior Art) The above-mentioned three-dimensional fabric can be used as a shock absorber or filter in its woven form, and is also used as a base material for fiber-reinforced composite materials with a matrix of resin or inorganic materials. Reinforced composite materials exhibit a combined effect with excellent mechanical and thermal properties, and are therefore expected to have a wide range of uses as structural materials and soundproofing materials for aircraft, automobile parts, bridges, rockets, etc.

This type of three-dimensional fabric is composed of a fabric in which the warp, weft, and perpendicular yarns are simply perpendicular to each other without meandering, and a fabric in which the positions of the weft and perpendicular yarns are dislocated and meandered relative to the warp. There are two types of fabrics: ordinary two-dimensional fabrics and fabrics that are organized in the same way. In the former case, since the threads are straight, there is little deformation due to applied forces such as tension, and the movement of the threads during weaving is simple, so efficient weaving is possible. On the other hand, the latter has good shape retention as a woven fabric, and has characteristics such as less change in the shape of the woven fabric when combined with a matrix such as a resin. As a three-dimensional loom equipped with a warp shedding device for obtaining the latter three-dimensional fabric, Japanese Patent Publication No. 17990/1983 discloses an apparatus shown in FIGS. 7 and 8. In this device, a screw shaft 33 that is driven to rotate synchronously by a motor 32 is vertically disposed on the top of a machine frame 31.
A mounting frame 35 for a warp support plate 34 on which a large number of warp threads z are suspended is attached to the screw shaft 33 via a nut portion 35a. A shedding device (heddle device) 36 is disposed at an intermediate position of the machine frame 31. The shedding device 36 includes a first heald 37 and a second heald 38 that are slidable on the machine frame 31. 1st heald 3
7, as shown in FIG. 8a, a series of warp thread insertion holes 39 and warp thread insertion slits 40 are arranged alternately for each series of warp threads in a direction diagonally crossing both rows and columns of warp threads z.
As shown in FIG. 8b, the second heald 38 is formed with a series of warp insertion holes 41 corresponding to the warp insertion slits 40 of the first heald 37. Warp thread insertion slits 42 are formed corresponding to the 39 series. Then, by moving both heddles 37 and 38, the vertical thread x or the weft thread y is
By changing the opening position for insertion of the ninth
As shown in Figures a and b, it is possible to obtain a weaving state in which both the weft yarn y and the vertical yarn x are disposed in a meandering manner with respect to the warp yarn z.

(Problem to be solved by the invention) However, in the conventional device, both healds 3
7 and 38 are formed in a rectangular shape, and the threads perpendicular to the openings of the warp threads inserted into the warp thread insertion holes 39 and 41 formed in the center part and the weft threads are inclined at an angle of 45 degrees with respect to the healds 37 and 38, respectively. inserted at an angle of Therefore, in order to avoid interference with both healds 37 and 38, the installation position of the vertical thread and weft thread insertion device must be set away from the warp thread group, and the length of the vertical thread and weft thread insertion tool (rapier) must be increased. There is this inconvenience. In addition, since the healds 37 and 38 are each formed integrally, the warp thread insertion holes 3
There is also the inconvenience that even if a malfunction occurs in a part of 9, 41, the whole must be replaced.

Structure of the device (means for solving the problem) In order to solve the above problem, this device uses keys parallel to the rows and columns of the warp group, in which a large number of warp threads are stretched in multiple rows and columns. A pair of heald frames each having a pair of arms formed with a groove and extending substantially orthogonally to each other are disposed facing each other, and each heald frame has a warp insertion hole and a key that is inserted into the keyway. The healds, which are formed so that the mating positioning grooves form an angle of 45° with the longitudinal direction, are fixed in parallel at a predetermined interval, and at least one heald frame is configured to be able to be driven back and forth in parallel with the longitudinal direction of the heald. did.

(Function) In this device, the heald frame for fixing the heald is provided with a pair of arms that extend parallel to the rows and columns of the warp thread groups and perpendicularly to each other. Alternatively, a space is secured for arranging other devices necessary for the three-dimensional loom, such as a weft insertion device. Further, the plurality of healds fixed to the heald frame can be easily positioned by fitting the keys into the positioning grooves, and can be easily and reliably fixed in a predetermined position.

(Example) Examples 1 to 5 that embody this idea are as follows.
This will be explained according to the diagram. The opening device 1 has a pair of arms 2L and 2R extending at 90 degrees to each other.
A pair of heald frames 3L and 3R each having a heald frame 3L and 3R are disposed facing each other. Arm 2L,
Key grooves 4L and 4R extending along the longitudinal direction are formed in 2R at an angle of 90 degrees to each other. In addition, a fitting groove 6 having a width equal to the width of the heald 5 is provided in the arm portions 2L, 2R and is connected to the key grooves 4L, 4R.
A plurality of them are formed in parallel at a predetermined interval equal to the width of the heald 5, forming an angle of 45°. Keys 7 are fitted into the key grooves 4L and 4R, respectively, and are tightened and fixed with bolts 8. A heald 5 is fitted into each of the fitting grooves 6 at its proximal end and along its longitudinal direction.
When the positioning groove 5a formed on the lower surface at an angle of 45° is fitted with the key 7, the bolt 9 is inserted.
It is tightened and fixed.

As shown in FIGS. 1 and 2, each heald 5 engages with a heald 5 fixed to the opposing heald frames 3L and 3R on its side, so that the heald frames 3L and 3R are brought close to each other and separated from each other. In either state, the tip thereof is arranged to engage with the other heald frame 3L, 3R. The center portion of the heald 5 is formed higher than the head of the bolt 9, and a warp guide tube 10 provided with a warp insertion hole is mutually connected to the warp guide tube 10 implanted in the adjacent heald 5. It is planted parallel to the grooves 4L and 4R. And both heald frames 3L,
3R is reciprocated in parallel to the longitudinal direction of the heald 5 by a drive device (not shown), and vertical yarns and wefts are inserted into the warp by a vertical yarn insertion device 11 and a weft insertion device 12 arranged near the heald frames 3L and 3R. It is adapted to be inserted into the opening.

Next, the operation of the apparatus configured as described above will be explained. A pair of heald frames 3L and 3R are respectively moved in the directions of arrows in FIGS. 1 and 2 by driving devices, and are placed in the closed state shown in FIG. 1 and in the open state shown in FIG. 2. Further, for convenience of explanation, an intermediate position between the two warp guide tubes 10, that is, a state in which six warp guide tubes 10 are arranged horizontally and vertically has been described with reference to FIGS. 5a, b, and d.

First, in the open state shown in FIG. 2, the weft yarn y is inserted between each row of warp yarns by the weft insertion device 12 as shown in FIG. y The selvage thread Y is inserted. In addition, in this state, hold frame 3
When L and 3R are placed at intermediate positions, the inserted weft y will be in the state shown in FIG. 5a.

After the weft yarn y is inserted in the state shown in Figure 4a,
With both heald frames 3L and 3R open, the vertical thread insertion device 11 inserts the vertical thread x so as to form a loop at its tip and fold it back, as shown in FIG. x The selvage thread X is inserted. In addition, in this state, hold frame 3
When L and 3R are placed at intermediate positions, the inserted vertical yarn x and weft yarn y are in the state shown in FIG. 5b.

Next, both heald frames 3L and 3R are moved and placed in the closed position shown in FIG. In this state, the vertical yarn x and the weft yarn y inserted into the warp z are in the state shown in FIG. 5c. In this state, the fourth
The insertion of the weft threads y and the selvage threads Y takes place, as shown in FIG. This completes the insertion of a series of weft yarns y and vertical yarns x. When both heald frames 3L and 3R are moved to the neutral position in this state, the weaving state shown in FIG. 5d is obtained. Note that in Figures 4c and d, the weft y and vertical yarn Each thread is drawn as one.

As the heald frames 3L, 3R move, each heald 5 is moved into engagement with the heald 5 fixed to the other heald frame 3L, 3R. Further, the position of the heald to which the bolt 9 is fixed is formed lower than the heald surface of the part where the warp guide tube 10 is implanted, and the head of the bolt 9 is arranged at a position lower than the center of the heald 5. Therefore, there is no possibility that the bolt 9 will obstruct the passage of the rapier inserted between the warp guide tubes 10.

Note that this invention is not limited to the above-described embodiment; for example, as shown in FIG. It is also possible to position the heald using only the key 7 and the positioning groove 5a and tighten and fix it with the bolt 9.

Effects of the invention As detailed above, according to this invention, it is possible to secure space for arranging the vertical thread or weft thread insertion device at a position close to the warp group on the outside of the heald frame, thereby reducing the size of the three-dimensional loom. At the same time, the length of the rapier for inserting vertical threads or weft threads can be shortened. Furthermore, since the heald is easily fixed at a predetermined position on the heald frame, even if a part of the heald malfunctions, only that part can be easily replaced, which is an excellent effect.

[Brief explanation of the drawing]

1 to 5 show an embodiment embodying this invention. FIG. 1 is a plan view showing the opening device in a closed state, FIG. 2 is a plan view showing the opening device in an open state, and FIG. Figure 3 is an enlarged sectional view taken along line A-A in Figure 1;
Figures 4a to 4d are schematic plan views showing the operation, Figure 5a
- d are schematic plan views showing the state of thread weaving, Fig. 6 is a plan view showing a modified example, Fig. 7 is a sectional view of a three-dimensional loom equipped with a conventional shedding device, and Figs. 8 a and b are the same. FIG. 9A is a plan view showing a conventional heald, FIG. 9A is a plan view showing a weft weaving state by a conventional device, and FIG. 9B is a plan view showing a vertical thread weaving state. Arms...2L, 2R, heald frame...3
L, 3R, keyway...4L, 4R, heald...
5, Positioning groove...5a, Fitting groove...6, Key...
...7. Vertical thread...x, Weft...y, Warp...z.

Claims (1)

[Claims for Utility Model Registration] 1. In a three-dimensional loom in which a large number of warp threads are stretched in multiple rows and columns, and the weft threads and vertical threads are woven between the rows and columns of the warp threads in a state perpendicular to the warp threads, the warp threads are A pair of heald frames each having key grooves parallel to the rows and columns of the group and having a pair of arms extending substantially perpendicularly are disposed opposite each other, and each heald frame has a warp thread insertion hole. At the same time, a heald, which is formed so that the positioning groove for fitting the key to be inserted into the keyway and the key groove is at an angle of 45° with the longitudinal direction, is fixed in parallel at a predetermined interval, and at least one heald frame is fixed to the heald. A shedding device for a three-dimensional loom configured to be able to reciprocate in parallel with the longitudinal direction. 2. The three-dimensional system according to claim 1, wherein each of the healds is fixed in a state of being fitted into a fitting groove formed in the heald frame at an angle of 45° with the keyway. Loom shedding device.