JPH04110773U - shedding device in a loom - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the weight of the latching connector of the shedding device, to enable the cam lever to swing at high speed, and to smoothly move the heald frame up and down at high speed. [Structure] A guide groove 25 is provided in a guide plate 23 of a latch connector 18 along the swinging direction of a cam lever 7. The guide groove 25 is formed with an arcuate portion 25a extending along a circle C centered on the rotation center of the cam lever 7, and an opposing portion 25b facing the side edge of the cam lever 7. The pull-down rope 15 is joined to the arcuate portion 25a and the opposing portion 25b of the guide groove 25, and the end portion of the pull-down rope 15 is fixed to the fixing portion 27. Furthermore, bolt 19
The latch connector 18 is fixed to the cam lever 7 by the tightening action, and the pull-down rope 25 is clamped and fixed between the facing portion 25b and the cam lever 7.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention combines the spring force of the tension spring acting on the jack lever and the driving force of the cam mechanism. This invention relates to a passive shedding device that moves a heald frame up and down by the cooperation of the above.

0002

[Conventional technology]

The opening device of the type disclosed in Japanese Unexamined Patent Publication No. 62-141147 has a device shown in FIG. The heald frame pull-down rope latching mechanism as shown is adopted. That is, Kamure A notched plate 3 having teeth 31a carved into the bar 31 and meshing with the teeth 31a Attach the base end connector 33a of the rope connector 33 to 2 via the bush 34. At the same time, the pull-down rope 35 is wound around the tip side connector 33b of the rope connector 33. Connected.

0003 In the opening device disclosed in Japanese Utility Model Application Publication No. 59-37378, the fixed shaft is An arc-shaped groove centered on the fixed shaft is formed at the tip of the opening lever that can swing as a center. After engaging the pull rope in this groove, fix the rope end to the opening lever. ing. In addition, the opening lever is provided with teeth, and the connecting rod that engages with the teeth allows the opening lever to be opened. A cam lever that swings due to rotation of the cam and the opening lever are operatively connected. .

0004

[Problem that the idea aims to solve]

However, in the configuration of FIG. 7, the sliding between the bush 34 and the proximal connector 33a is The spring action of the tension spring concentrates on the contact area, which tends to cause wear and tear. Care must be taken to avoid running out of lubricant. Maintenance management for such refueling is This is complicated and also causes a problem of oil scattering due to the swinging of the cam lever 31. Also, when the cam lever 31 is swung at high speed, the The pull rope 35 is pulled up between the guide roller (not shown) and the rope connector 33. vibrates downward. When such vibrations are transmitted to the heald frame, the heald frame can smoothly move up and down. This interferes with the operation of the loom.

[0005] According to the configuration disclosed in Japanese Utility Model Application Publication No. 59-37378, the opening occurs as the cam lever swings. Even if the opening lever swings, the pull rope always follows the tangent to the arc formed by the groove. This means that the pull rope vibrates up and down between the opening lever and the guide roller. There isn't. However, the bush and connector are not installed between the cam lever and the connecting rod. Sliding coupling configurations involving unavoidable lubrication problems still exist. Ru. In addition, many parts such as cam levers, connecting rods, and opening levers are used. , due to the complexity of the mechanism and the large driving weight, the height of the cam lever has to be increased. The ability of the pull-down rope to follow high-speed swinging is reduced, and the drive timing of the heald frame is inaccurate. It has the problem of becoming .

[0006] The purpose of this invention is to solve the above-mentioned conventional problems all at once, and to improve the cam lever and rotor. The heald frame can be moved smoothly even during high-speed operation without the need for lubrication between the heald frame and the An object of the present invention is to provide a shedding device for a loom that can be moved vertically.

[0007]

[Means to solve the problem]

In order to solve the above problems, the present invention uses a heddle in the cam lever that constitutes the cam mechanism. Attach the latch connector that connects the rope that connects to the frame, and attach the rope to the latch connector. A rope guide is provided along the swinging direction of the cam lever, and an arc is provided on the rope guide. The rope path from the heald frame is low. While maintaining a guiding relationship that matches the tangential direction of the arcuate part of the rope guide, Connect to the arcuate part and opposing part of the rope guide, and tighten the latch connector to the cam lever. By fixing the rope, the rope is sandwiched between the opposing part of the rope guide and the cam lever. Fixed.

[0008]

[Effect]

The latching connector has a rope interposed between the opposing part of the rope guide and the cam lever. It is tightened and fixed to the cam lever in the position. With this rope tightening configuration, the cam lever The rope connected to the cam lever reciprocates in the direction of the rope path following the swinging of the cam lever. However, due to this reciprocating movement, the rope does not slide against the arc of the rope guide. Repeat contact and separation. Therefore, there is no need to lubricate between the cam lever and the rope. , there is no problem of oil splashing due to swinging of the cam lever.

[0009] Also, by bringing the rope guide and cam lever closer together, the entire length of the latching connector can be adjusted. Since it is as short as possible, the latch connector is lighter than the conventional one. Therefore, Ka The moment of inertia of the latch connection structure including the lever and latch connector is small. This makes it possible to swing the cam lever at high speed.

0010

【Example】

An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 4. As shown in Figure 1, each opening block on both side frames 1 (only one is shown) of the loom. A jack lever 3 is rotatably supported on each racket 2 via a support shaft 3a. A hanging rope 4 is fixed to the inner end of each jack lever 3, and A movable attachment body 5 is fixed to the lower end of the hanging rope 4.

[0011] On the side of one side frame 1 is a tappet cam that rotates in synchronization with the rotation of the machine. A cam mechanism consisting of a cam lever 6 and a cam lever 7 is housed in a cam box 8. Ta The contact area between the pet cam 6 and the rotor 7a on the cam lever 7 is located inside the cam box 8. soaked in oil. Then, a pair of pull-down rollers pass through the guide roller 14. The levers 15 and 16 are used to connect the pair of left and right movable mounting bodies 5 to the tip of the cam lever 7. A locking connector 18 is connected.

0012 One end of a connecting rope 9 is fixed to the outer end of the jack lever 3. A hanger 10 is fixed to the other end. Directly below the outer end of jack lever 3 A hanger bracket 11 is fixed to the outer surface of the side frame 1. A tension spring 12 is stretched between the hanger bracket 11 and the hanger 10. . Therefore, the rotor 7a of the cam lever 7 is moved against the tappet by the spring action of the tension spring 12. The rotation of the tappet cam 6 is converted into the vertical movement of the movable mounting body 5. be done. As a result, the heald frame 13 installed and supported between both movable attachment bodies 5 moves up and down. be done.

[0013] As shown in FIGS. 2 and 3, the cam lever 7 has a pair of locking connectors 18. It is tightened and fixed by bolts 19A and 19B so that the mounting position can be adjusted. A pressure contact piece 20 is interposed between the bolts 19A, 19B and the cam lever 7. The latch connector 18 has a U-shaped support frame 21, side plates 21a of the support frame 21, The guide plate 23 is clamped and fixed between the tips of the bolts 19A and 19B. By tightening the pressure contact piece 20 and the rear end protrusion 23a of the guide plate 23, the cam It is pressed against the side edge of the lever 7. Note that the bolt 19A connects the guide plate 23 to the support frame 21. A pair of pins 24 are provided at a position slightly above the position facing the pair of pins 24. The bolt 19B is provided at a position facing the rear end protrusion 23a of the guide plate 23. ing. Therefore, the rear end protrusion 23a is pressed against the cam lever 7 mainly by the bolt. Due to the tightening action of 19B.

[0014] As shown in FIGS. 2 to 4, the guide plate 23 has two edges extending from the upper edge to the right edge. The guide grooves 25 and 26 are arranged in parallel. Each guide groove 25, 26 is connected to the guide plate 2. 3. The arcuate portions 25a, 26a of the upper edge and the right edge of the guide plate 23 of the cam lever 7. It includes opposing portions 25b and 26b facing the side edges. A window 28 is provided in the fixed portion 27 that protrudes below the guide plate 23. A pair of insertion holes 29 reaching 28 are located at opposing portions 25b, 26b of each guide groove 25, 26. are provided consecutively. At the position where both insertion holes 29 are extended across the window 28, A pair of rope holding holes 30 are recessed. A pair of left and right supports supporting the heald frame 13 The other ends of the pulling ropes 15 and 16 fixed to the lower end of the movable attachment body 5 are connected to guide ropes. It is wound around and joined to the guide grooves 25 and 26 via the rubber 14, and its tip is connected to the insertion hole 29. and is inserted into the rope holding hole 30 through the window 28. As a result, the pulling rope 15 , 16 are reversely joined along the guide grooves 25 and 26.

[0015] A set screw 41 is screwed into the fixing part 27 so as to reach the window 28, and a circular A concave portion 42 having an arcuate surface shape is formed facing the set screw 41 . inside window 28 A press rod 43 is connected between the tips of the pulling ropes 15 and 16 and the set screw 41. are interposed, and the pulling ropes 15, 16 are pulled down by the tightening action of the set screw 41. are bent and pressed in the recess 42. Note that the curvature of the pressing surface of the press rod 43 is the same as that of the fixed part 2. 7 is set smaller than the curvature of the recess 42, and the pulling ropes 15 and 16 are The rope bends between the peripheral edge 43a of the pressure contact surface of the srod 43 and the peripheral edge 42a of the recess 42. The songs are getting tougher. Therefore, the pull ropes 15 and 16 are strongly pinched inside the window 28. It is worn.

[0016] Here, the depth of the guide grooves 25 and 26 is d, and the original thickness of the pulling ropes 15 and 16 is t, the rear end protruding part 23a of the guide plate 23 is the opposing part 25b of the guide grooves 25, 26, If the amount of protrusion toward the cam lever 7 side with respect to the upper edge of 26b is h, the depth d is the thickness t. (d<t), and the sum of depth d and protrusion h is smaller than thickness t. is set (d+h<t). Therefore, the tightening action of bolts 19A and 19B As a result, the pulling ropes 15 and 16 are connected to the opposing portions of the cam lever 7 and the guide grooves 25 and 26. 25b, 26b, the latch connector 18 is placed on the cam lever 7. Fixed.

As shown in FIGS. 1 and 2, the arcuate portions 25a, 26a of both the guide grooves 25, 26 are arranged in a circle C having an angular range θ ₁ on a circle C centered on the rotation center C ₁ of the cam lever 7. It is formed to follow. Here, the angular range in which the cam lever 7 swings is defined as θ ₂ , and when the cam lever 7 is tilted to the right and the heald frame 13 is at the lowest movement position, each of the pulling ropes 15 and 16 moves within the angular range θ _{2 .} It is assumed that the left boundary line r ₁ coincides with the tangent at the intersection of the guide grooves 25 and 26. Then, when the cam lever 7 tilts to the left and the heald frame 13 is in the upward movement position, the pull-down ropes 15 and 16 move along the tangent at the intersection of the right boundary line r ₂ of the angular range θ ₂ and the guide grooves 25 and 26. matches.

That is, although the cam lever 7 and the pull-down ropes 15, 16 move relative to each other, the position where the pull-down ropes 15, 16 and the guide grooves 25, 26 start contacting each other (referred to as a contact start point P) is always They will be in the same position at the same height. Therefore, the pulling ropes 15 and 16 simply repeat contact and separation without sliding against the guide grooves 25 and 26 within the angular range θ ₂ , and the pulling ropes 15 and 16 are connected to the guide grooves 25 and 26. The position shown in FIGS. 1 and 2 is always maintained between the contact starting point P and the guide roller 14, and there is no vertical vibration.

[0019] Note that the support frame 21 moves along the cam lever 7 based on the action of the bolts 19A and 19B. The mounting position can be changed up and down by changing the heald frame 13. The amount and thus the warp opening angle can be changed. The radius of circle C is relatively large. Therefore, by slightly changing the position of the support frame 21, the arcuate portions 25a, 26 of the guide grooves 25, 26 Even if a deviates from circle C, the vibration of the pulling ropes 15 and 16 is extremely small. .

[0020] As described above, according to this embodiment, the fixing portion 27 is integrally formed on the guide plate 23. Can be pulled down with the minimum necessary configuration of fixing part 27, set screw 41 and press rod 43 The ends of ropes 15 and 16 are fixed. Furthermore, attach the guide plate 23 to the cam lever 7. The overall length of the latch connector 18 is made as short as possible by bringing them into contact with each other. Therefore, hang The stopper connector 18 has a compact structure as a whole, has fewer parts, and is lightweight. The cam lever 7 and the latch connector 18 can be arranged in a small space. It can be easily stored in the cam box 8.

[0021] Therefore, the moment of inertia of the latch connection structure including the cam lever 7 is quite small. This makes it possible to swing the cam lever 7 at a higher speed than before. Cam lever 7 Even if the ropes are swung at high speed, the pull ropes 15 and 16 do not vibrate. The heald frame 13 is moved up and down smoothly and accurately by faithfully reflecting the cam profile of the cut cam 6. can move.

[0022] By integrally forming the fixing part 27 with the guide plate 23, strength is improved. Ru. Also, by providing a non-penetrating rope holding hole 30 in the fixing part 27, the rope can be maintained easily. Tighten the setscrew 41 while pushing the ends of the pull-down ropes 15 and 16 into the holding holes 30 and applying pressure. This makes it easy to fix the end of the rope in a fixed position. The ends of the pull-down ropes 15 and 16 are bent and fixed to the recess 42 of the fixed part 27 by pressure contact. The rope is placed straight along the rope insertion path to the fixed part 27. It is more resistant to pull-out than when it is pressed in a closed state. Furthermore, the pulling rope 15,1 6 is clamped and fixed between the cam lever 7 and the opposing parts 25b and 26b of the guide grooves 25 and 26. In addition, since it is bent and guided approximately at right angles at the entrance of the insertion hole 29, the pull-down robot The tensile fluctuation load generated on the loops 15 and 16 causes compression between the guide plate 23 and the cam lever 7. buffered by the area. Therefore, rope slippage and rope damage can be prevented reliably and over a long period of time. can be prevented.

[0023] The tensile load via the pulling ropes 15, 16 is applied to the arcuate portions 25a of the guide grooves 25, 26. , 26a and the opposing parts 25b, 26b, and this action is applied to the rear end protruding part. The moment is centered around the contact area between the cam lever 7 and the cam lever 23a. bolt 19 The tightening action of A counteracts this moment, but the connection part Since they are close together, the moment is minimum. Therefore, the latch connector 1 The load due to the moment between 8 and cam lever 7 is minimized and the latching link is The strength required for the tie 18 can be reduced. That is, the latch connector 18 It is possible to ensure the necessary strength while making the structure even more compact. Also, hanging Is no extra load moment generated between the stopper coupling 18 and the cam lever 7? There is no risk of looseness or misalignment between the two.

[0024] A pair of left and right pulling ropes 15 and 16 are separately fixed to the latch connector 18. Therefore, even if one of the ropes breaks, only that broken rope can be replaced. It is extremely economical in terms of maintenance and management. Furthermore, the relationship between the pulling ropes 15 and 16 without sliding contact and the guide grooves 25 and 26 is as follows. It reliably prevents wear at the contact area between the two, and eliminates the need for lubricating this contact area. do. Therefore, there is no need to provide a special lubrication mechanism, which reduces the complexity of lubrication maintenance and management. There are no problems such as oil scattering due to high-speed swinging of the cam lever 7.

[0025] Note that the present invention is not limited to the above embodiments, but can be implemented in the following manner. Can also be done. That is, (1) As shown in Fig. 5, the right edge of the guide plate 23 facing the cam lever 7 has a A guide groove 44 for the pulling rope 15 is provided on the cam lever 7 side without providing a guide groove. To go. (2) The opposing surfaces of the recess 42 and the press rod 43 are similar curved surfaces with different curvatures. To form into. As a result, both pull-down ropes 15 and 16 fit perfectly between both opposing surfaces. It is joined with. (3) The fixed part 27 is made separate from the guide plate 23, and the fixed part 27 is attached to the support frame 21. Fix with pins etc. between both side plates 21a and 21b. (4) Make the rope guide a smooth curved shape close to an arc. (5) As shown in FIG. 6, when a convex portion 25c is provided on the opposing portion 25b of the guide groove 25, In addition, the cam lever 7 is provided with a concave portion 45 corresponding to the convex portion 25c, and the pulling rope 1 5 between the convex portion 25c and the concave portion 45.

[0026]

[Effect of the idea]

As detailed above, according to the present invention, the latch connector has an arc-shaped rope guide. is provided along the swinging direction of the cam lever, and the rope path is tangent to the rope guide arc. The rope is joined to the rope guide while maintaining a guiding relationship that matches the direction. This eliminates problems such as rope vibration, friction damage, and lubricant scattering. The heald frame can be smoothly moved up and down even during high-speed operation.

[0027] Also, since the rope is clamped and fixed between the opposing part of the rope guide and the cam lever, The weight of the latch connector has been reduced, and the cam lever can be swung at high speed. It has excellent effects.

[Brief explanation of drawings]

FIG. 1 is a front view of one side of an opening device showing an embodiment embodying the present invention.

FIG. 2 is an enlarged longitudinal cross-sectional view of the latch connector.

FIG. 3 is an enlarged plan view of the latch connector.

FIG. 4 is a sectional view taken along line AA in FIG. 2;

FIG. 5 is an enlarged vertical cross-sectional view of a main part showing another example of the present invention.

FIG. 6 is an enlarged vertical cross-sectional view of a main part showing another example of the present invention.

FIG. 7 is a front view of main parts of a conventional opening device.

[Explanation of symbols]

3 jack lever, 7 cam lever, 12 tension spring, 13 heald frame, 15, 16 pull-down rope, 18 latch connector, 25, 26 guide groove as a rope guide, 25a, 26a arcuate portion, 25b, 26b opposing portion.

Claims (1)

[Scope of utility model registration request] Claim 1: In a passive shedding device that moves a heald frame up and down by the cooperation of the spring force of a tension spring acting on a jack lever and the driving force of a cam mechanism, the cam lever constituting the cam mechanism has a rope connected to the heald frame. A latching connector is attached to connect the heald frame, and a rope guide is provided on the latching connector along the swinging direction of the cam lever, and the rope guide has an arc-shaped portion and a facing portion that faces the cam lever. By joining the rope to the arcuate part and the opposing part of the rope guide, and tightening and fixing the latch connector to the cam lever, while maintaining a guiding relationship such that the rope path coincides with the tangential direction of the arcuate part of the rope guide. A shedding device for a loom in which a rope is clamped and fixed between the opposing part of a rope guide and a cam lever.