JP5044391B2 - Opening mechanism and loom having such an opening - Google Patents

Description

  The present invention relates to an opening forming mechanism of a loom. With regard to the traction mechanism in particular, in the traction mechanism, the articulated rod is used to transmit the movement generated by the dobby or positive weaving mechanism to the heald frame. The invention also relates to a loom having the mechanism specified above.

In the field of loom opening formation, it is known to use articulating rods that connect a moving drive member to a vertically movable heald frame attached to the loom. For example, in French Patent Application No. 2836488, the force transmission articulating rod can have a tubular member, which is fitted with an end member with a hole for connection to a peristaltic lever or drive arm. Are combined. In view of many configurations in which the opening forming mechanism is to be incorporated, the connecting rod includes a connecting rod, the length of which is adjustable, has a portion having an eye hole, is inserted into the tubular member, and in the tubular member mooring nut cooperates, be provided with a shank designed to be locked with screws acting crimping force on the shank against the abutting member to the shaft portion on the inner surface of the tubular member It is known. Such a concept requires that the holding means be provided inside the end of the tubular member, both for the nut and for the locking member receiving the bearing force. Such a concept also requires the provision of shaft guide means in order to prevent obstructive movement in a transverse direction perpendicular to the direction in which the holding force obtained by the nut acts. While these stresses lead to an elaborate structure at the end of the articulated tubular member, thereby increasing its cost, the accuracy actually obtained is not satisfactory. In addition, these structural arrangements can make it difficult to fully insert the shaft into the tubular member, thereby making it impossible to reduce the minimum length of the connecting rod below a limit value.
French patent application No. 2836488

In particular, the present invention aims to eliminate these drawbacks by providing a new opening forming mechanism, and the length of the connecting rod can be easily adjusted depending on the configuration of the loom. can, on the other hand, the reliability of the precision and connecting rod, which can cost a is and the length of the connecting rod having economy is adjusted, the filled and loom request art can and this to operate at high speed It is supposed to be.

In order to solve this problem, according to the present invention, the opening forming mechanism includes at least one connecting rod whose length is adjustable and / or removable, and the connecting rod is suitable for fitting into a tubular member. In the opening forming mechanism, the connecting rod receives the shaft portion with respect to the tubular member. The opening forming mechanism has a first portion including the shaft portion and holding means for holding the shaft portion in a predetermined position in the tubular member. And a sheath-like member having an internal volume (V ₄₁ ) forming a housing for centering, the sheath-like member being located inside the tubular member and holding the sheath-like member itself at least one of the holding means So that the sheath member has at least one portion for centering the sheath member relative to the inner surface of the tubular member. Or forming said part, Wherein the serial is part integrally formed with elastically deformable tabs are of Sayajo member forming the housing (V _41).

The present invention, Sayajo member inserted into an end of the tubular member of the connecting rod plays multiple functions, i.e., function of performing the centering of the shaft portion relative to the tubular member, and / or one or more retaining It serves to position the means, while the tubular member is formed smoothly and without carved parts, thus making the manufacture of the tubular member very easy.

BEST MODE FOR CARRYING OUT THE INVENTION

According to an advantageous and not essential configuration of the invention, the loom opening forming mechanism cooperates with one or more of the following features obtained in several technically feasible combinations. The sheath-like member has or forms at least one part for centering the sheath-like member against the inner surface of the tubular member, which part is advantageously for receiving and centering the shaft It is composed of an elastically deformable tab formed integrally with a portion of the sheath-like member forming the housing, and this tab is designed to abut against and support the inner surface of the tubular member. Yes.
The sheath member is made from a synthetic material, preferably made by injection molding, in particular made from an injection molded plastic material.
The above mentioned holding means comprises a locking member held by Sayajo member in the tubular member by a form of cooperating locking member that is designed to support the shaft abuts thereto.
The holding means comprises a clamp mounted on the sheath and / or tubular member, with screws suitable for exerting a force on the clamp and through an opening formed in the sheath, the force being a shaft And is oriented in a direction extending transverse to the longitudinal axis of the tubular member.

  The present invention provides a loom including the loom opening forming mechanism as described above. Such looms are easier to assemble and / or operate than prior art looms.

  The present invention can be clearly understood and other advantages are described in the figures by reference numerals, but more clearly in the following description of an embodiment of a mechanism applying the principles of the present invention. Become.

In FIG. 1, the dobby 1 serves to drive the plurality of heald frames of the loom M, and reference numeral 2 indicates only one of the plurality of heald frames. Frame 2 is driven by a vertical motion F ₁ which reciprocates. In order to do this, the actuator arm 1a of the dobby 1 is connected to the first swing lever 4 by means of a connecting rod 3 extending obliquely, and the swing lever 4 itself is connected by a connecting rod 3 'to the second swing lever 4'. Connected to. The two levers 4 and 4 'are pivoted about respective axes 5 and 5' which are fixed relative to the structure 6 of the loom. Each of the levers 4 and 4 'is connected to the frame 2 by a connecting rod 3 ".

  A plurality of arms 1a and a set of connecting rods 3, 3'3 "and levers 4, 4 'are provided to drive the heald frame.

The connecting rod 3 ″ is shown in FIGS. 2 to 4 and comprises a tubular member _31, which receives in its internal volume V _{31 a} shaft portion 32 belonging to an extension that identifies the eye 34 for connection to the frame 2. is designed to. tubular member 31 identifies the eyelet 35 for connection of the connecting rod 3 relative to the lever 4.

  The articulating rod 3 "is adjustable in length and removable.

The sheath-like member 40 is designed to be inserted into the end region V ′ ₃₁ of the volume V ₃₁ , that is, a portion of this volume is the portion closest to the end 36 away from the eye opening 35 of the tubular member 31. The shaft portion 32 enters the volume V ₃₁ through the end portion 36.

The sheath member 40 is made by injection molding of a synthetic material, in particular polyamide or polyacetal, so that the sheath member exhibits a certain degree of elasticity. The sheath-like member is an integral part, and its main body portion 41 extends vertically and specifies a through hole whose transverse dimension matches the cross section of the shaft portion 32, and the shaft portion is moved and guided with a small gap in the shaft portion. The shaft portion is inserted into the through-hole and attached to the tubular member 31 by the sheath-like member 40.

The internal volume V ₄₁ of the central through-hole in the body portion 41 constitutes a housing for receiving and guiding the shaft portion 32, while the shaft portion is inserted therein and later withdrawn therefrom.

Sayajo member 40 has a collar portion 42, the collar portion in order to limit the insertion movement of the sheath member 40 in the direction of the arrow F _2, so that abuts against the end 36 of the tubular member 31.

The entire transverse cross section of the tubular member 31 is a rectangle having its long sides indicated by reference numerals 311 and 312 and its short sides 313 and 314. The transverse dimension of the sheath member 40 is designed to allow centering by crimping against the inner surface 37 of the tubular member 31. To do this, the sheath member 40 comprises two elastically deformable tabs 43 and 44 that are formed integrally with the body portion 41 and abut against the short sides 313 and 314 of the tubular member 31. The central axis X ₄₁ of the internal volume V ₄₁ as a housing can thus be held parallel to the longitudinal axis X ₃₁ -X ′ _{31 of the} tubular member 31.

The width l ₄₀ of the sheath-like member 40 is substantially equal to the distance d ₃₁ between the long sides 311 and 312 of the tubular member 31 so that when the sheath-like member 40 is inserted into the tubular member 31 these It is crimped to the side surface and held in the lateral direction.

The width of the sheath-like member 40 is precisely fitted to the volume V ₃₁ by four wedges oblique to the axis X ₄₁ , the wedges extending in the direction of the collar part 42 and paired with the side of the body part 41. Two of the wedges are arranged and can be seen by reference numeral 47 on the side surface 41a of the body part 41 facing the viewing side in FIG.

  The sheath-like member 40 has two openings 45 and 46. When the sheath-like member 40 occupies the position of the tubular member 31, the openings 45 and 46 face the short sides 313 and 314 of the tubular member 31, respectively. Designed to.

The clamp 50 is attached to the sheath member 40 and has a first branch 51 for pushing the outside of the short side 313 of the tubular member 31 when the sheath member occupies a position in the tubular member 31. The clamp 50 also has a second part branch 52 with a lip 53 extending in a direction generally parallel to the direction of the axis X ₄₁ and extending generally perpendicular to the branch 52. It's over. When the clamp 50 is installed, its branch 52 extends into the sheath-like member 40 with the opening 45 and its lip 53 is oriented in the direction of the short side 313 of the tubular member 31.

The rectangular nut 60 receives the shaft portion 61 of the screw 62 that is located between the branch 52 and the short side 313 of the tubular member 31 and passes through the hole 38 formed in the short side 313.

Thus, tightening the screw 63 in the screw hole 63 of the nut 60 means that the position of the screw in the direction YY ′ perpendicular to the axis XX ′ and parallel to the long sides 311, 312 of the tubular member 31. Makes it possible to correct This causes a thrust force F ₃ toward the short side 314 of the tubular member 31 to act on the branch 52, and this force is transmitted to the shaft portion 32 when the shaft portion is fitted in the volume V ₄₁ .

The locking member 70 is placed in the opening 46 and its surface denoted by reference numeral 71 faces in the direction of the volume V ₄₁ and the surface denoted by reference numeral 72 is the short side 314 of the tubular member 31. Facing. The surfaces 71 and 72 are parallel to each other and have teeth 71 a and 72 a that are harder than the surface hardness of the inner surface 37 and harder than the surface of the shaft portion 32 at least in the region of the short side 314 closest to the end portion 36. ing.

The teeth 71a and 72a extend in the direction AA ′ perpendicular to the axis X ₃₁ -X ′ ₃₁ and the direction YY ′.

The locking member 70 includes two stubs 73 that allow it to be supported on the stubs 48 and 49 formed by the sheath-like member 40 so that the locking member 70 has its face 71 passing through the opening 46 and FIG. Even when heading toward the volume V ₄₁ in the figure, the lock member 70 is prevented from passing through the opening 46, thus allowing the lock member 70 to receive the shaft portion 32 to be crimped by the action of the force F _3. .

Thus, the volume V ₄₁ constitutes a housing for receiving the shaft portion 32, while the clamp 50, nut 60, screw 62 and lock member 70 are subjected to a force F ₃ on the shaft portion in the direction YY ′. Make it possible.

Under the force F ₃ , the shaft portion 32 is securely crimped to the teeth 71 a of the lock member 70, while the teeth 72 a are reliably crimped to the side surface of the tubular member 31 that is the short side 314. When a relative hardness comparable to the surface hardness of the tubular member 31 and the shaft portion 32 is imparted to these teeth, the teeth have a micro-identity with respect to the facing portions, whereby the shaft portion 32 and the locking member. The coefficient of friction between 70 and the direction AA ′ is perpendicular to the axis X ₃₁ -X ′ ₃₁ , in particular the coefficient of friction between the locking member 70 and the tubular member 31 is significantly increased. Nevertheless, good results can be obtained by replacing the teeth 71a and / or 72a with diagonal or crossed teeth, knurls or spikes.

Tabs 43 and 44 and the wedge 47 allows the Sayajo members 40 is centered within the volume _{V 31.} These can be elastically deformed to absorb alignment errors between the axis X ₃₂ -X ′ ₃₂ of the shaft ₃₂ and the axis X ₃₁ -X ′ ₃₁ of the tubular member .

The length L ₄₁ of the opening of the body portion 41 is sufficient to the shaft portion 32 effectively guided and supported, whereas both are inserted along the direction of the arrow F _4, and on the other hand by the force F ₃ Moored. Actually, this length L ₄₁ is not smaller than the length dimension of the nut 60 or the lock member 70.

The articulating rod 3 "is assembled and adjusted in length by partially inserting the locking member 70 into the opening 46, while the clamp 50 is latched on the sheath 40 and the nut 60 is crimped to the branch 52. that. clamp 50 and nut 60 because it is held by the cooperation between the positions are held. stub 48, 49 and 73 by branch 51 acting on Sayajo member 40, in the direction of the volume V ₄₁ there is no risk of the movement of the locking member 70. Thereafter, Sayajo member 40 is fitted in this way. screw 62 is inserted into the tubular member 31 in the direction of arrow F ₂ is fitted from it into the screw hole 63 , making it impossible to elements 40, 50, 60, 70 is loosened. then, after the screw 62 is tightened to exert a holding force _{F 3,} the shaft portion 32 Sayajo member 40 and the tubular member 3 During, until the desired length is obtained connecting rods 3 ", it is inserted in the direction of the arrow F _4. By loosening the screw 62, the length of the connecting rod can be changed or removed.

  The tubular member 31 is specially simple to manufacture and inexpensive.

  The other connecting rods 3 and 3 ″ of the loom M can be provided on the same principle as the connecting rod 3 ″. As a different embodiment, some of the articulating rods need not be adjustable in length or suitable for removal.

  The present invention is not limited to a loom having a positive dobby, but is also applied to a loom having a connecting dowel suitable for the above-described frame and having a negative dobby, and is also applied to a mechanical loom having a cam mechanism.

FIG. 1 is a conceptual diagram showing the principle of a loom according to the present invention. FIG. 2 is a principle longitudinal sectional view of one of the connecting rods of the loom of FIG. FIG. 3 is a view similar to FIG. 2 showing the combined articulation rod. FIG. 4 is an exploded perspective view of the connecting rod portion of FIGS.

3 connecting rod 31 the tubular member 32 the shaft portion 37 inner surface 40 Sayajo member 41 Sayajo member portion 42 collar portion 43 centering member (tab)
44 Centering member (tab)
45 Opening 47 Centering member 48 Stub (cooperating shape)
49 Stub (cooperating shape)
50 Holding means 60 Holding means 62 Screw 70 Holding means (locking member)
71 Surface of lock member 70 71a Carved portion 72a Carved portion 72 Surface of lock member 70 73 Stub (cooperating shape)
F ₃ force V ₄₁ interior volume X ₃₁ -X _'31 longitudinal axis Y-Y' direction

Claims (5)

An opening forming mechanism of a loom, the opening forming mechanism comprising at least one connecting rod whose length is adjustable and / or removable, the connecting rod being a shaft part suitable for fitting into a tubular member In an opening forming mechanism, comprising: a first portion comprising: a holding portion for holding the shaft portion in a predetermined position in the tubular member;
The connecting rod (3) comprises a sheath-like member (40) having an internal volume (V ₄₁ ) that forms a housing for receiving and centering the shaft (32) relative to the tubular member (31), The sheath member is located inside the tubular member and serves to hold the sheath member itself in place relative to the tubular member by at least one of the retaining means (50, 60, 70). The sheath member (40) has at least one portion (43, 44, 47) for centering the sheath member (40) against the inner surface (37) of the tubular member, or And the portion is an elastically deformable tab (43, 44) formed integrally with a portion of the sheath-like member (40) forming the housing (V ₄₁ ). The opening forming mechanism.   Opening mechanism according to claim 1, characterized in that the sheath-like member (40) is made from a synthetic material by injection molding.   The holding means consists of a locking member (70) anchored by a sheath-like member (40) in a tubular member (31) by a cooperating shape (48, 49, 73), said member having a shank (32). The opening forming mechanism according to claim 1, wherein the opening forming mechanism is configured to abut against and support the same. Screws suitable for the retaining means to exert a force (F ₃ ) on the sheath member (40) and / or on the tubular member (31) and through an opening formed in the sheath member ( 62) with a clamp (50) attached by means of the force (F ₃ ) for clamping the shank and transverse to the longitudinal axis (X ₃₁ -X ′ ₃₁ ) of the tubular member The opening forming mechanism according to claim 1, wherein the opening forming mechanism is oriented in an extending direction (YY ′).   A loom including the opening forming mechanism according to any one of claims 1 to 4.

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