JP2018028164A - Heald frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heald frame capable of suppressing generation of crack from a connection part of a frame body due to vertical motions of the heald frame.SOLUTION: A heald frame 1 comprises a pair of frame bodies 20 and 20 disposed apart from each other and a pair of side stays 30 and 30 connected to both sides of the respective frame bodies 20. The frame body 20 includes a core material 21 formed of foam resin material extending in a longer direction of the frame body 20, a plate-like part 23 formed of fiber-reinforced composite material formed so as to coat the core material 21, and connection parts 25 integrally attached to the plate-like part 23 on both sides of the plate-like part 23 and formed of metallic material connected to the respective side stays 30. The side stay 30 is formed of metallic material. The side stay 30 is connected to the connection part 25 of the frame body 20 through a fastening member 6.SELECTED DRAWING: Figure 3

Description

  The present invention generally relates to the structure of a heald frame used in a loom.

  Conventionally, a heald frame used in a woven fabric supports a heald for passing a warp in a loom. When weaving, a pair of heald frames are alternately moved up and down to open a warp. It is for driving the weft into the.

  Such a heald frame includes a pair of frame main bodies serving as upper and lower frame frame staves extending in the longitudinal direction, and a pair of side stays arranged at both ends in the longitudinal direction of the pair of frame main bodies and connecting the two frame main bodies. Have. The frame body is formed with a support protrusion that supports the heald so as to pass between the pair of frame bodies along the longitudinal direction of the frame body.

  In general, the frame body and the side stay are connected to each other by a connecting portion in a detachable structure. In addition, a guide plate for preventing interference between the heald frames and a coupling at a location for transmitting the power of the vertical movement of the heald frame are attached to the heald frame.

  For example, as such a heald frame, a heald frame in which the frame body is formed of a fiber reinforced composite material has been proposed (see, for example, Patent Document 1), and foamed as a core material in a space along the longitudinal direction of the heald frame body. A heald frame in which a body is accommodated has also been proposed (see, for example, Patent Document 2).

JP, 2015-083727, A JP 2006-138040 A

  However, when the heald frame is moved up and down, dynamic stress tends to act on the heald frame. At this time, the fiber reinforced composite material constituting the frame main body does not have ductility (has brittleness) as compared with a metal material such as aluminum constituting the side stay. Cracks such as cracks are likely to occur due to dynamic stress.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a heald frame that can suppress the occurrence of cracks from the connecting portion of the frame body by the vertical movement of the heald frame. There is to do.

  In view of the above problems, a heald frame according to the present invention is a heald frame including a pair of frame bodies that are spaced apart from each other and a pair of side stays that are coupled to both sides of each frame body. The frame body includes a core material made of a foamed resin material extending in a longitudinal direction of the frame body, a plate-like portion made of a fiber-reinforced composite material formed so as to cover the core material, and the plate shape A connecting portion made of a metal material that is integrally attached to the plate-like portion and connected to each of the side stays on both sides of the portion, the side stay being made of a metal material, The stay is connected to the connecting portion of the frame body via a fastening member.

  According to the present invention, the core body of the frame body is made of a foamed resin material, and the plate-like portion covering the core material is made of a fiber reinforced composite material. Therefore, the frame body is lighter than the frame body made of a metal material. It is. Therefore, when the heald frame moves up and down, the dynamic stress acting on the heald frame can be reduced.

  Furthermore, since the connecting portion attached to both sides of the plate-like portion and the side stay connected to the connecting portion via the fastening member are made of a metal material, while reducing the difference in thermal expansion of the heald frame, Even when dynamic stress is applied to the connecting portion of the frame body during the vertical movement, cracks and the like hardly occur from the connecting portion.

  According to the present invention, it is possible to suppress the occurrence of cracks from the connecting portion of the frame body due to the vertical movement of the heald frame.

It is a typical perspective view of the main part of a loom provided with the heald frame of the present invention. It is a typical perspective view of the heald frame shown in FIG. It is the perspective view which decomposed | disassembled the frame main body and side stay of the heald frame shown in FIG. It is arrow sectional drawing along the AA of FIG. (A) is arrow sectional drawing along the BB line of FIG. 4, (b) is arrow sectional drawing along the CC line of FIG. It is a disassembled perspective view of a connection part vicinity. It is arrow sectional drawing along the DD line of FIG. It is sectional drawing which showed the modification of this embodiment shown in FIG. It is sectional drawing which showed the other modification of this embodiment shown in FIG.

  Hereinafter, a heald frame according to an embodiment of the present invention will be described with reference to FIGS.

1. As shown in FIG. 1, the loom has two heald frames 1, 1 and transmits power in the vertical direction via a coupling 8 attached to the heald frame 1. This is an apparatus for weaving the fabric F while moving the heald frame 1 up and down relative to each other. Further, a guide member 9 for preventing the mutual interference of the heald frames 1 is attached to the heald frame 1.

  As shown in FIG. 2, the heald frame 1 is a hollow frame having a plurality of healds 4, 4,. The heddle frame 1 includes a pair of frame main bodies (held frame staves) 20 and 20 that are spaced apart from each other vertically, a pair of side stays 30 and 30 that are connected to both sides of each frame main body 20, and It has. As shown in FIG. 3, the frame main body 20 and the side stay 30 are detachably connected via a fastening member 6 described later. In FIG. 3 and subsequent drawings, the heald 4 shown in FIG. 2 is omitted for convenience.

2. As shown in FIG. 4, each frame body 20 is formed so as to cover a core material 21 made of a board-like foamed resin material extending in the longitudinal direction of the frame body 20 and the core material 21. And a plate-like portion 23 made of a fiber-reinforced composite material. Furthermore, each frame main body 20 includes a connecting portion 25 made of a metal material that is integrally attached to the plate-like portion 23 and connected to each side stay 30 on both sides of the plate-like portion 23.

2-1. About Core Material 21 As described above, in this embodiment, the core material 21 is made of a foamed resin material. Thereby, while reducing the weight of the frame main body 20, the intensity | strength can be raised rather than the hollow frame main body which does not have the core material 21. FIG.

  The material of the core material 21 is not particularly limited as long as it is a foamed resin material, but is not limited to polycarbonate resin, acrylic resin, thermoplastic polyester resin, polymethacrylimide resin, polystyrene resin, or polypropylene resin. Resin etc. are mentioned. In addition, a synthetic resin may be used independently or 2 or more types may be used together. Especially, since the foamed resin material of the core material 21 and the fiber reinforced composite material of the plate-like portion 23 can be more firmly integrated, a thermoplastic polyester resin or an acrylic resin is preferable, and an acrylic resin is preferable. More preferred.

  An acrylic resin is prepared by preparing a polymerizable solution containing an acrylic monomer having maleic anhydride and methacrylamide, a foaming agent containing urea, and a polymerization initiator, and polymerizing the polymerizable monomer. Thereafter, a resin obtained by foaming the foamable polymer obtained by the polymerization is preferred.

  The thermoplastic polyester resin is a high molecular weight linear polyester obtained as a result of a condensation reaction between a dicarboxylic acid and a dihydric alcohol. Of the thermoplastic polyester resins, aromatic polyester resins are preferable.

  The aromatic polyester-based resin is a polyester containing an aromatic dicarboxylic acid component and a diol component, for example, polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polycyclohexanedimethylene terephthalate, polyethylene naphthalate, or polybutylene naphthalate. Polyethylene terephthalate is preferable. In addition, an aromatic polyester-type resin may be used independently or 2 or more types may be used together.

  In addition to the aromatic dicarboxylic acid component or the diol component, the aromatic polyester-based resin includes, for example, a tricarboxylic acid such as a tricarboxylic acid such as trimellitic acid, a tetracarboxylic acid such as pyromellitic acid, A trihydric or higher polyhydric alcohol such as an anhydride, a triol such as glycerin, or a tetraol such as pentaerythritol may be contained as a constituent component.

  Polyethylene terephthalate may be crosslinked by a crosslinking agent. As a crosslinking agent, a well-known thing is used, For example, acid dianhydrides, such as a pyromellitic anhydride, a polyfunctional epoxy compound, an oxazoline compound, or an oxazine compound is mentioned. In addition, a crosslinking agent may be used independently or 2 or more types may be used together.

2-2. About the plate-like portion 23 The plate-like portion 23 covers the board-shaped core member 21 extending in the longitudinal direction of the frame body 20 and supports a plurality of healds 4, 4,... Along the longitudinal direction of the frame body 20. A support protrusion 24 for the hook hanger is integrally formed.

  On both sides of the plate-like portion 23, an accommodation recess 23 a that accommodates the connection projection 31 of the side stay 30 in a state of covering the core member 21 is formed. The accommodation recess 23a has such a depth that the connection projection 31 abuts against the end surface 21a of the core member 21 in a state where the connection projection 31 is received (see FIG. 7). The housing recess 23 a is adapted to fit into the connecting convex portion 31 in a state where the connecting convex portion 31 is received.

  In the present embodiment, the plate-like portion 23 is made of a fiber reinforced composite material. Thereby, weight reduction can be achieved rather than the plate-shaped part which consists of metal materials, such as aluminum, and adhesiveness with respect to the core material 21 can be improved. If the core material 21 can be impregnated with the matrix resin constituting the fiber-reinforced composite material of the plate-like portion 23, the adhesion between the core material 21 and the plate-like portion 23 can be further enhanced.

  The plate-like portion 23 can be manufactured by, for example, a sheet mold compound (SMC). Specifically, a sheet made of uncured thermosetting resin and reinforcing fibers is placed in the molding die so as to cover the core material 21, and after clamping, the plate-like portion is heated. 23 can be manufactured. In addition, you may insert-mold the connection part 25 mentioned later to the plate-shaped part 23 at this time. At this time, the foamed resin of the core material 21 (preliminarily foamed) may be further foamed.

  The material of the plate-like portion 23 is not particularly limited as long as it is a fiber reinforced composite material. For example, the reinforcing fiber constituting the fiber reinforced composite material may be glass fiber, carbon fiber, silicon carbide fiber, alumina. Inorganic fibers such as fibers, Tyranno fibers, basalt fibers, ceramic fibers; metal fibers such as stainless steel fibers and steel fibers; organic fibers such as aramid fibers, polyethylene fibers, polyparaphenylene benzoxador (PBO) fibers; or boron fibers Is mentioned. Reinforcing fibers may be used alone or in combination of two or more. Among these, carbon fiber, glass fiber or aramid fiber is preferable, and carbon fiber is more preferable. These reinforcing fibers have excellent mechanical strength despite being lightweight.

  The reinforcing fiber is preferably used as a reinforcing fiber substrate processed into a desired shape. Examples of the reinforcing fiber substrate include woven fabrics, knitted fabrics, non-woven fabrics, or face materials obtained by binding (stitching) fiber bundles (strands) in which reinforcing fibers are aligned in one direction with yarns. . Examples of the weaving method include plain weave, twill weave, and satin weave. Examples of the yarn include synthetic resin yarns such as polyamide resin yarns and polyester resin yarns, and stitch yarns such as glass fiber yarns.

  A thermosetting resin is preferably used as the matrix resin impregnated in the reinforcing fibers of the fiber-reinforced composite material. The thermosetting resin is not particularly limited. For example, epoxy resin, unsaturated polyester resin, phenol resin, melamine resin, polyurethane resin, silicon resin, maleimide resin, vinyl ester resin, cyanide. Examples thereof include acid ester resins, or resins obtained by prepolymerizing maleimide resins and cyanate ester resins. A thermosetting resin may be used independently or 2 or more types may be used together. Of these, epoxy resins and vinyl ester resins are preferable. According to these thermosetting resins, the plate-like portion 23 having excellent elasticity can be formed, and the impact resistance of the obtained plate-like portion 23 can be improved. Further, the thermosetting resin may contain additives such as a curing agent and a curing accelerator.

  The content of the thermosetting resin in the fiber reinforced composite material is preferably 20 to 70% by weight, and more preferably 30 to 60% by weight. When the content of the thermosetting resin is too small, the binding property between the reinforcing fibers and the adhesiveness between the plate-like portion 23 and the core material 21 (foamed resin material) become insufficient, and the mechanical strength of the plate-like portion 23. In addition, the impact resistance of the plate-like portion 23 may not be sufficiently improved. Moreover, when there is too much content of a thermosetting resin, there exists a possibility that the mechanical strength of the plate-shaped part 23 may fall and the impact resistance of the plate-shaped part 23 cannot fully be improved.

2-3. About the connection part 25 The connection part 25 is a part which is made of a metal material, is integrally attached to the plate-like part 23 on both sides of the plate-like part 23, and is connected to each side stay 30. In the present embodiment, as shown in FIGS. 5A and 5B, the connecting portion 25 has a cross-sectional shape (a cross-section orthogonal to the longitudinal direction) of the portion covering the core member 21 in the plate-like portion 23. Shape) and substantially the same cross-sectional shape. The connecting portion 25 is formed with an insertion portion 25 a through which the connecting convex portion 31 of the side stay 30 is inserted. The insertion portion 25a of the connection portion 25 is fitted to the connection protrusion 31 of the side stay 30 in a state where the connection protrusion 31 is inserted through the insertion portion 25a.

  Further, as shown in FIG. 6, the connecting portion 25 is in a position communicating with the female screw portion 31 a formed on the connecting convex portion 31 of the side stay 30 in a state where the connecting convex portion 31 of the side stay 30 is inserted. A female screw portion 25b is formed. The frame main body 20 and the side stay 30 can be connected by fastening the male screw portion 61 of the metal fastening member 6 via the female screw portion 31a and the female screw portion 25b.

  The material of the plate-like portion 23 is not particularly limited as long as it is a metal material, and examples thereof include aluminum, aluminum alloy, and stainless steel. The plate-like portion 23 and the connecting portion 25 may be joined by, for example, an adhesive, but may be integrally formed by, for example, insert molding.

3. Side Stay 30 The side stay 30 is a member made of a metal material, and is a member that extends in the vertical direction and is connected to both sides of the frame main bodies 20 and 20 that are spaced apart from each other in the vertical direction. As shown in FIGS. 3 and 6, the side stay 30 is formed with a connecting projection 31 for connecting to the frame body 20. The connection convex part 31 is adapted to fit into the insertion part 25 a formed in the connection part 25 of the frame body 20 and the accommodation concave part 23 a formed in the plate-like part 23.

  The material of the side stay 30 is not particularly limited as long as it is a metal material, and examples thereof include aluminum, aluminum alloy, stainless steel, and the like, which are the same as the material of the connecting portion 25 of the frame body 20. It is preferable that Thereby, since the difference in thermal expansion between the side stay 30 and the connecting portion 25 can be suppressed, it is possible to avoid damage to the connecting portion 25 or the fastening member 6 described later, which is caused by the difference in thermal expansion.

4). As shown in FIG. 6, the side stay 30 is connected to the connecting portion 25 of the frame main body 20 via the fastening member 6. Specifically, as described above, the connecting convex portion 31 of the side stay 30 is inserted into the insertion portion 25a formed in the connecting portion 25 of the pair of frame main bodies 20, and the distal end portion 31b of the connecting convex portion 31 is inserted. It accommodates in the accommodation recessed part 23a formed in the plate-shaped part 23. FIG.

  In this state, the male screw portion 61 of the fastening member 6 is screwed into the female screw portion 25b formed in the connecting portion 25 of the frame body 20 and the female screw portion 31a formed in the connecting convex portion 31 of the side stay 30. Put them on and tie them together. Thereby, as shown in FIG. 7, the frame main body 20 and the side stay 30 are connected. The fastening member 6 is not particularly limited as long as it is a member having a male screw portion 61 that is screwed into the female screw portions 25b and 31a, and examples thereof include a screw such as a bolt or a countersunk screw.

  The connecting portions 25 formed on both sides of the plate-like portion 23 are made of a metal material. Accordingly, even when dynamic stress is applied to the connecting portion 25 of the frame main body 20 when the heald frame 1 moves up and down as described with reference to FIG. 1, cracks and the like hardly occur from the connecting portion 25. Further, the side stay 30 connected to the connecting portion 25 via the fastening member 6 is also made of a metal material, preferably the same metal material as the connecting portion 25. Thereby, the influence by the thermal expansion and thermal contraction of the connection part 25 and the side stay 30 can be suppressed, and it can reduce that a crack etc. generate | occur | produce in these.

  Further, since the core material 21 of the frame body 20 is made of a foamed resin material and the plate-like portion 23 covering the core material 21 is made of a fiber-reinforced composite material, the frame body 20 is lighter than the frame body made of a metal material. It is. Accordingly, the dynamic stress acting on the heald frame 1 when the heald frame 1 moves up and down can be reduced.

  Furthermore, since the connection convex part 31 of the side stay 30 is fitted in these in the state accommodated in the plate-shaped part 23 and the connection part 25, the connection state of the frame main body 20 and the side stay 30 is stabilized. In particular, since the end surface 31c of the connecting convex portion 31 of the side stay 30 and the end surface 21a of the core member 21 are in contact with each other, the connection state between the frame body 20 and the side stay 30 can be further stabilized.

  As shown in FIG. 7, in the above-described embodiment, the heald frame 1 has a structure in which the distal end portion 31 b of the connecting convex portion 31 is accommodated in the accommodating concave portion 23 a formed in the plate-like portion 23. However, for example, as shown in FIG. 8, the end 21b of the core member 21 is brought into contact with the inner wall of the insertion portion 25a by inserting the end portion 21b of the core member 21 into the insertion portion 25a of the connecting portion 25. Also good.

  In particular, if a resin containing maleic anhydride is used for the foamed resin of the core material 21, the resin is familiar with the connecting portion 25 made of a metal material. Strength can be increased.

  Furthermore, as shown in FIG. 9, the convex part 25c may be formed in the part which contact | connects the plate-shaped part 23 of the connection part 25, and the plate-shaped part 23 may be formed so that this convex part 25c may be inserted | pinched. Thereby, the plate-shaped part 23 and the connection part 25 can be connected more firmly.

  As mentioned above, although several embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment, In the range which does not deviate from the mind of this invention described in the claim, it is various. The design can be changed.

  1: Held frame, 4: Held, 6: Fastening member, 8: Coupling, 9: Guide member, 20: Frame body, 21: Core material, 21a: End face, 21b: End part, 23: Plate-like part, 23a : Receiving recess, 24: support protrusion, 25: connecting portion, 25a: inserting portion, 25b: female screw portion, 25c: convex portion, 30: side stay, 31: connecting convex portion, 31a: female screw portion, 31b: Tip part, 61: Male thread part, F: Woven fabric

Claims (1)

A heald frame comprising a pair of spaced frame bodies and a pair of side stays connected to both sides of each frame body,
The frame body includes a core material made of a foamed resin material extending in the longitudinal direction of the frame body, a plate-like portion made of a fiber-reinforced composite material formed so as to cover the core material, and the plate-like portion A connecting portion made of a metal material that is integrally attached to the plate-like portion and connected to each of the side stays.
The side stay is made of a metal material,
The heald frame according to claim 1, wherein the side stay is connected to the connecting portion of the frame body via a fastening member.

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