JPH0268331A - Production of heald frame for loom and outer frame stay for heald frame - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a heald frame for a loom and an outer frame stay for a heald frame, and more specifically, the present invention relates to a method for manufacturing a heald frame for a loom and an outer frame stay for a heald frame. The present invention relates to a method for manufacturing an excellent heald frame for a loom and an outer frame stay for a heald frame that can simplify the molding process.

[Conventional technology]

A heald frame for a loom is used for weaving by suspending a large number of healds (belts) through which warp threads are inserted, and performing high-speed shedding motion on the loom. High-rigidity, high-strength materials are required to avoid deformation or destruction during construction. Therefore, the material for heald frames for looms has changed from soft materials such as wood to metal materials such as iron, stainless steel, aluminum alloys, and magnesium alloys.

However, in recent years, with the advancement of high-speed weaving technologies such as air jet looms, even higher speed movement has been required for heddles.

In this case, there is a limit to the speed improvement that can be achieved using heavy metal materials, and there is a need for lighter materials with higher strength and rigidity.

From this point of view, the use of carbon fiber reinforced plastics (hereinafter referred to as CFRP), which have high specific strength and specific stiffness, can be considered.
For example, Japanese Unexamined Patent Publication No. 47-434557 proposes using CFRP for a heald frame or dropper rod that supports a heald (belt) or a dropper.

[Problem to be solved by the invention] However, in the conventional CFRP heald frame, the assembly part of the outer frame stay and heald stave is bonded using adhesive, which causes stress concentration in the joint part, resulting in static Even if it passed the physical strength test, the joints would peel off during use, which was an issue in practical application. Furthermore, if delamination occurs at the joint, the entire heald frame must be replaced, which poses a problem in that it requires a great deal of time and money, such as stopping the equipment and preparing replacement heald frames, which poses a problem in practical application. It had become.

Furthermore, it is difficult to manufacture such heald frames by assembly method due to the anisotropy of strength and weak adhesive force between fiber layers.
The adhesive method had to be used.

An object of the present invention is to provide a method for manufacturing a heald frame for a loom and an outer frame stay for a heald frame, which solves the conventional problems.

[Means for Solving the Problems] That is, the present invention provides a heald frame for a loom formed by a sandwich structure mainly composed of a fiber-reinforced resin and a lightweight core material. An assembly insert member or an assembly insert that has a fiber-reinforced resin surface plate that covers the surface and grooves on both surfaces to which the surface plate can be fitted and connected, and that is arranged at both ends of a lightweight core material. An object of the present invention is to provide a heald frame for a loom comprising an outer frame stay having a member and a hook member, and a heald stave having means for fitting and fixing the assembly insert member.

The present invention also provides a method for manufacturing an outer frame stay for a heald frame formed of a sandwich structure mainly composed of a fiber reinforced resin and a lightweight core material, in which uncured thermosetting resin matrix prepreg or thermoplastic resin matrix prepreg is used. A lightweight core material as a fiber-reinforced resin surface plate, and an assembly insert member disposed at both ends of the lightweight core material, or a groove portion of the assembly insert member on both sides of the assembly insert member and a hook member, Another object of the present invention is to provide a method for manufacturing an outer frame stay for a heald frame, which comprises laminating an assembly insert member and a hook member so as to fit into the grooves, heating and pressurizing them.

Hereinafter, the present invention will be explained based on the drawings.

1.2 are front views of specific heald frames for looms according to the present invention. 3.4 are perspective views of the outer frame stay of one embodiment of the present invention, FIG. 3 is a partially fragmented view of the periphery of the insert member for assembly, and FIG. It is a partially fragmented view of the periphery of the insert member and the hook member. FIG. 5 is a fragmented sectional view and a side view of the end of a heald stave according to an embodiment of the present invention.

In FIG. 1, the heald frame for a loom is composed of a heald stave 1 and an outer frame stay 3, and a belt rod 2, a middle hook 4, and a fishing fitting 5 are arranged on the heald stave 1 and the outer frame stay 3, respectively.

In Fig. 2, the heald frame for a loom is composed of a heald stave 1 and an outer frame stay 3, and a belt rod 2, a middle hook 4, and a hook member 9 are connected to the heald stave 1 and the outer frame stay 3, respectively.
It is arranged on the outer frame stay 3. The fishing fitting 5 shown in FIG. 1 and the hook member 9 shown in FIG. 2 have similar functions.

The above heald frame for a loom can be manufactured and assembled as follows.

As shown in FIG. 3, the outer frame stay 3 has a lightweight core material 8 and an assembly insert member 6 joined together, and is further integrated with a surface plate 7. As shown in FIG. 4, another outer frame stay 3 has a lightweight core material 8, an assembly insert member 6, and a hook member 9 joined together, and is further integrated with a surface plate 7.

As the lightweight core material 8 shown in FIG. 3.4, a lightweight material with a specific gravity of 1 or less, such as honeycomb material, wood, or foamed plastic, is used. In particular, honeycomb material is preferred from the viewpoint of weight reduction. The lightweight core material 8 used in the present invention may be obtained by molding and cutting this lightweight material into a desired shape in advance.

The assembly insert member or the assembly insert member and the hook member used in the present invention are characterized by having a groove portion into which a surface plate can be fitted and joined. This assembly insert member, or the assembly insert member and the hook member, is inserted into the groove portion 16 of the surface plate 7 of the sandwich structure of the outer frame stay 3 as shown in FIG. 3 or 4.
By fitting and joining, the assembly insert member 6 or the assembly insert member 6 and the hook member 9
Even if a bending shearing force is applied to the groove 16, the protrusion 17 corresponding to the groove 16 serves as a fixed wall to prevent peeling due to mechanical action. When the assembly insert member 6 or the assembly insert member 6 and the hook member 9 are used in a state where they are assembled into the outer frame stay 3, bending stress acts on that portion in addition to pure shear stress. For this reason, a large stress concentration acts on the assembly insert member or the adhesive layer between the assembly insert member and the hook member and the surface plate, and even though the average shear stress is small, the actual situation is that it leads to failure. . By providing a groove in the assembly insert member or the assembly insert member and the hook member, the protrusion corresponding to the groove effectively acts against this bending stress, thereby preventing stress concentration. The appropriate depth of the groove is approximately the same as the thickness of the surface plate, but the height may be adjusted depending on the load during use. Specifically, 0.2 mm or more,
4iII11 or less is suitable. Further, the width of the protrusion corresponding to the groove may be determined depending on the load, and a width of 0.5 mm or more and 5 mm or less is appropriate.

The present invention may include a flat plate assembly insert member, or a flat plate assembly insert member and a hook member, with square timbers or the like being joined at necessary locations as protrusions.

The assembly insert member 6 and the hook member 9 shown in FIG. 3 or 4 can be made of lightweight metal materials with high strength and rigidity. Among these, aluminum, magnesium, titanium, and alloys thereof are preferred from the viewpoint of ease of cutting.

It is preferable that the assembly insert member 6 and hook member 9 shown in FIG. 4 be manufactured integrally rather than separately.

The assembly insert member and the hook member can be processed by general machining. For example, it can be processed from a plate-shaped material by means such as milling, milling, and lathe processing. Moreover, when manufacturing in large quantities, it is also possible to manufacture by methods such as casting and die casting. The grooves of the assembly insert member and the hook member are preferably subjected to embossing, plastering, surface treatment, etc. in order to increase the joining effect. In addition, commonly used silane coupling agents as surface treatment agents,
Examples include titanium coupling agents and acid treatment agents.

The shape of the assembly insert member 6 is not particularly limited, although a convex shape is used in FIG. 3.4.

The insert members 6 or hook members 9 for assembly may be attached to both ends of the lightweight core material 8 in the longitudinal direction, and the surface plates 7 may be joined from both sides of the lightweight core material 8 with an adhesive or the like to be integrated. The adhesive may be one commonly used and is not particularly limited.

The surface plate 7 is made of lightweight and strong fiber reinforced resin (hereinafter referred to as FR).
Preference is given to plates made of P).

The reinforcing fibers used in the FRP include carbon fibers, graphite fibers, alumina fibers, silicon carbide fibers, silica fibers, boron fibers, inorganic fibers such as glass fibers, aromatic polyamides, aromatic polyester fibers, and high-strength polyethylene fibers. These include organic fibers and metal fibers, and one or more of these can be selected and used. Among these, carbon fiber is preferred.

Examples of matrix resins include epoxy resins, phenol resins, alkyd resins, urea formaldehyde resins, polyester resins, aromatic polyamide resins, polyamide-imide resins, polyester-imide resins, polyimide resins, polybenzothiazole resins, and silicone resins. Thermosetting resin, polyethylene, polypropylene, polymethyl methacrylate, polystyrene (including so-called high impact polystyrene), polyvinyl chloride,
ABS resin, styrene-acrylonitrile polymer, polyamide (nylon 6.6/6.6/10,6/11.6)
・12.12 etc.), polyacetal, polysulfone,
Examples include thermoplastic resins such as polycarbonate, polyphenylene oxide, polyether sulfone, polyether ether ketone, and polyamideimide.

Although the fiber lamination structure of the FRP surface plate can be made isotropic, it is preferable to determine the lamination structure so that the number of laminated fibers is the minimum for the load actually applied to the heald frame.

Further, as the surface plate, uncured thermosetting resin matrix prepreg or thermoplastic resin matrix prepreg can also be used. The uncured thermosetting resin matrix prepreg referred to here is a sheet made by impregnating reinforcing fibers with an uncured thermosetting resin such as epoxy resin as a matrix and converging in one direction, or a sheet made of uncured resin. A sheet made by impregnating reinforcing fiber into a woven fabric. Further, the term "thermoplastic resin matrix prepreg" refers to a sheet formed by impregnating reinforcing fibers with a thermoplastic resin as a matrix and converging the same as in the case of thermosetting resins.

Resins and reinforcing fibers that can be used in the prepreg include those for the surface plate described above.

The heating and pressurizing conditions when integrating prepreg with honeycomb materials etc. vary depending on the type of resin used, but in the case of general-purpose epoxy resin, the heating conditions are generally 80 to 15
0°C, pressurization conditions are 2-15kg/c+fl
is appropriate. In addition, in the case of heat-resistant epoxy resin, the heating condition is 150 to 200°C, and the pressurizing condition is 2
~20 kg/cJ is appropriate. In the case of thermoplastic resin, the heating conditions are the melting point of the resin used plus 10 to 60 degrees.
C, and the appropriate pressurizing conditions are 2 to 20 kg/c+fl.

The outer frame stay of the present invention can be manufactured by arranging insert members for assembly at both ends of a lightweight core material, then laminating prepreg for the surface plate on both sides of the lightweight core material, etc., and hardening and integrating them by heating and pressing. . At this time, the prepreg is fitted into the groove of the assembly insert member, and the resin of the prepreg acts as a lightweight core material and an adhesive between the assembly insert member and the prepreg.

Next, as shown in FIG. 5, the heald steve 1 has a fitting member 11, a fishing hook attachment member 15, and a screw attachment member 13 at both ends, and is composed of a lightweight core material 14 and a surface plate 10.

As the lightweight core material 14 of the Heald Steve 1, a lightweight material with a specific gravity of 1 or less, such as honeycomb material, wood, or foamed plastic, is used. In particular, honeycomb material is preferred from the viewpoint of weight reduction. The lightweight core material 14 used in the present invention may be obtained by molding and cutting this lightweight material into a desired shape in advance. The lightweight core material 14 of the heald stave 1 and the lightweight core material 8 of the outer frame stay 3 may be made of different materials.

The surface plate 10 covers the surface of the lightweight core material 14 of the Held Steve 1, and is preferably lightweight and strong.
A plate material made of RP is preferred. The reinforcing fibers and matrix resin used in the surface plate 10 include the surface plate 7.
You can use the same one used for. Moreover, the prepreg used for the outer frame stay can be used similarly.

As the fitting member 11, metal materials such as aluminum, iron, titanium, and alloys thereof, and FRP can be used. The fitting member 11 has a space into which the assembly insert member 6 shown in FIG. 3.4 can fit.

The fishing fitting attachment members 15 are disposed at both ends of the heald steve I, and are used to join the fishing fittings 5 for lifting the heald frame for a loom to the heald steve I.

As the fishing fitting attachment member 15, metal materials such as aluminum, iron, titanium, and alloys thereof, and FRP materials can be used. The heald frame for a loom shown in FIG. 2 does not require the hook attachment member 15 because it has the hook member 9.

As a means for fixing the assembly insert member 6, a screw attachment member 13 is provided on the heald steve 1. The screw mounting member 13 has a screw hole 12, and when the assembly insert member 6 is fitted into the fitting member 11, the heald stave 1 and the outer frame stay 3 are fixed and integrated with bolts, screws, etc. Ru.

The fitting member 11, the fishing fitting attachment member 15, and the screw attachment member 13 are each integrated with the lightweight core material 14 by the surface plate 10, but before joining by the surface plate, the lightweight core material and these members are bonded with adhesive in advance. You can leave it as is. The adhesive may be one commonly used and is not particularly limited.

〔Effect of the invention〕

The heddle frame for looms of the present invention is extremely lightweight, has high rigidity, and has excellent tensile strength and fatigue strength, so it causes less damage to the warp threads and enables higher speed operation, and the power mechanism can be made smaller, reducing power consumption. In addition to saving money and reducing noise, the machine can be assembled and disassembled, so even if the heald frame breaks during operation, machine downtime can be kept to a minimum.Furthermore, the simple shape reduces molding costs. Its industrial value is enormous because it can be reduced.

In addition, since the method for manufacturing the outer frame stay of the present invention uses prepreg, the molding and curing steps can be completed in one step, simplifying the molding process and shortening the molding time, so it has great industrial value. It's large.

〔Example〕

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples in any way.

Example 1 G Aluminum honeycomb with a length of 600 mm, a width of 40 mm, and a thickness of 5.9 mm (High Hetsuta Core @ 3/8-1ON-
521) Assembly insert member/hook member (manufactured by Yokohama Rubber ■) having grooves shown in Figure 4 at both longitudinal ends (length 100 mm, maximum width 80 mm, thickness 7.5 mm)
40mm wide and 700mm long on both sides.
Fiber basis weight 200g/rrT unidirectional carbon fiber/Eboxy prepreg (Magnamite@AS-4/19
08 HP-200000 manufactured by Sumika Vercules ■) (
0' 10°/90° 10°] laminated configuration with 4
12 sheets were laminated and hot pressed at a pressure of 8 kg/cd.
The mixture was cured and integrated at 0°C for 12 hours to obtain an outer frame stay. The depth of the groove of the assembly insert member and hook member is 5.
The width of the protrusion corresponding to the groove is 0.8 mm.

At this time, the prepreg was molded so as to fit snugly into the groove. The assembly insert member and hook member were manufactured from rolled aluminum alloy (7075) plate material by milling.

On the other hand, for comparison, we manufactured an assembly insert member and a hook member that were identical in appearance to the above-mentioned assembly insert member and hook member, but did not have a groove into which the prepreg was fitted. The outer frame stay was manufactured using the following method.

Next, the tensile strength of these outer frame stays was measured using Shimadzu Autograph DC5-25. As a result of measuring by hooking a tensioning jig to the hook members on both sides, the outer frame stay using the above member with grooves had a tensile load of 880k.
However, the outer frame stay made of a member without grooves was broken due to peeling of the joint under a tensile load of 260 kg.

Next, the same aluminum honeycomb as above was made to a length of 1600 m.
m, cut to a width of 100 mm, and placed steel fitting members and steel screw mounting members on both ends of the honeycomb, and laminated the same unidirectional carbon fiber/epoxy prepreg as above on both sides and true-pressed. Medium, pressure 8kg/crIl 120
The mixture was cured and integrated at °C for 12 hours to obtain a heald steve.

Next, fit the insert member for assembly of the outer frame stay into the fitting member of this held stave, fix it with bolts via the screw attachment part, and then attach the member such as the held rod, and then The heald frame for a loom shown in the figure was manufactured.

The weight of the obtained heald frame for a loom was 2.35 kg, which was approximately 50% lighter than a heald frame made entirely of aluminum alloy (4.4 kg).

Furthermore, we installed this heddle frame for a loom in a set of 6 on an air jet type loom and evaluated its performance. As a result, it was possible to operate without any abnormality even at a rotation speed of 11,000 rp. The operating efficiency is about 5 compared to the maximum rotation speed of 650 rpm.
Improved by 0%. Further, when power consumption was compared at the same rotation speed (650 rpm), power consumption was 300 W lower per loom when the heald frame of the present invention was used.

Example 2 Unidirectional carbon fiber epoxy prepreg with fiber basis weight 200 g/nf (Magnamite @ MS-4/ 190B・1 (
P-200000 manufactured by Sumika Verkyures ■) (0610
'/90' 10°] by laminating 4 sheets with a lamination configuration of 0.
8mm thickness x 700mm square and 300mm x 1
Two 560 mm flat plates were press-molded using a conventional method to produce CFRP plates.

5. 9mm thick aluminum honeycomb (manufactured by Hypex Core ■3/8-1ON-520 Yokohama Rubber ■)
Cut out 700mm x 700mm, and put the above 700mm square CFI on the front and back sides. The short side of the honeycomb is the 0° fiber direction of the P plate,
A CFRP/AI honeycomb board was produced by attaching the film adhesive so that the areas without honeycomb were evenly distributed.

Next, this CFRP/AI honeycomb board was cut into a 27 mm wide piece so that the longitudinal direction was in the fiber O° force direction to obtain an outer frame stay material.

Next, from the rolled plate material of aluminum alloy (7075),
The assembly insert shown in the figure was manufactured using frust processing. The depth of the groove of the assembly insert member is 0.8m.
m, and the width of the protrusion corresponding to the groove is 1.5 mm.

The assembly insert member was fitted into the outer frame stay material so that the surface material of the portions without the honeycomb at both ends of the outer frame stay material fit into the grooves of the assembly insert member, and they were bonded with a film adhesive to produce an outer frame stay.

On the other hand, for comparison, we manufactured an assembly insert member that was externally identical to the aforementioned assembly insert member, but did not have a groove into which the surface plate was fitted, and attached the outer frame stay to the assembly insert member using the same method as described above. was produced.

Next, the tensile strength of these outer frame stays was measured using Shimadzu Autograph DC5-25. As a result of making a hole in the center of the assembly insert members on both sides and inserting a tensioning jig into the hole, the outer frame stay using the above member with grooves had a tensile load of up to 1200 kg.
The outer frame stay using a member without grooves has a tensile load of 48
At 0 kg, the joint part peeled off and broke.

Next, the same aluminum honeycomb as above was cut to 300 mm.
Cut out to 1484mm x 300mm manufactured above.
+ A CFRP/Al honeycomb board was manufactured by attaching a CFRP board of 1560 mm in diameter and a film adhesive so that the areas without honeycomb were evenly distributed at both longitudinal ends. This plate was cut into a piece having a width of 85 mm so that the longitudinal direction was in the fiber O'' direction to obtain a Held Steve material.

A steel fitting member, a steel screw attachment member, and a steel fishing fitting attachment member were fitted into the parts of this heald steve material without the honeycomb at both ends, and a heald steve was manufactured using film adhesive.

Next, fit the insert member for assembly of the outer frame stay into the fitting member of this heald stave, fix it with bolts via the screw attachment part, and then attach a member such as a belt rod. The heald frame for a loom shown in the figure was manufactured.

The weight of the obtained heald frame for a loom was 2.2 kg, which was 50 kg compared to an all-aluminum alloy heald frame (4.4 kg).
% lighter.

Furthermore, we installed this heddle frame for a loom in a set of 6 on an air jet type loom and evaluated its performance. As a result, it was possible to operate without any abnormality even at a rotation speed of 11,000 rp. The operating efficiency is about 5 compared to the maximum rotation speed of 650 rpm.
Improved by 0%. Further, when power consumption was compared at the same rotation speed (650 rpm), power consumption was 300 W lower per loom when the heald frame of the present invention was used.

[Brief explanation of the drawing]

1.2 is a front view of a specific heald frame for a loom according to the present invention, FIG. 3.4 is a perspective view of an outer frame stay of an embodiment of the present invention, and FIG. 5 is a front view of a specific heald frame for a loom according to the present invention. FIG. 2 is a fragmented cross-sectional view and a side view of an end portion of a heltosteve according to an embodiment of the present invention. 1 ..... Belt steeple 3 ..... Outer frame stay 6 ..... Assembly insert member 7.10 ・
... Surface plate 8.14 ... Lightweight core material 9 ... Hook member 11 ... Fitting member 16 ... Groove section 17 ... Protrusion section 23 complete - Figure Figure Figure

Claims (2)

[Claims] (1) In a heald frame for a loom formed by a sandwich structure mainly composed of a fiber-reinforced resin and a lightweight core material, the lightweight core material and a fiber-reinforced resin face plate covering both surfaces of the lightweight core material and an outer frame stay that has grooves on both surfaces into which the surface plate can be fitted and connected, and that has an assembly insert member or an assembly insert member and a hook member disposed at both ends of the lightweight core material. and a heald frame for a loom comprising a heald stave having means for fitting and fixing the assembly insert member. (2) In a method for manufacturing an outer frame stay for a heald frame, which is formed by a sandwich structure mainly composed of fiber-reinforced resin and a lightweight core material, uncured thermosetting resin matrix prepreg or thermoplastic resin matrix prepreg is used. A lightweight core material as a fiber-reinforced resin surface plate, and an assembly insert member disposed at both ends of the lightweight core material, or both sides of the assembly insert member and the hook member, and the groove portion of the assembly insert member, or A method for producing an outer frame stay for a heald frame, which comprises laminating the assembly insert member and hook member so as to fit into the grooves, heating and pressurizing them.