JPH0721581Y2 - Shedding device in loom - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a negative opening device for moving a heddle frame up and down by cooperation of a spring force of a tension spring acting on a jack lever and a driving force of a cam mechanism. Is.

[Conventional technology]

In this type of opening device disclosed in Japanese Patent Application Laid-Open No. 62-141147, a hooking mechanism using a bush and a connector is adopted between the cam lever and the rope connector. Since the spring action of the tension spring concentrates at the sliding contact portion between the bush and the connector, wear damage is likely to occur, and therefore lubrication is taken into consideration so that lubricating oil will not run out. However, since the sliding contact between the bush and the connector is severe, the periodic maintenance of refueling is troublesome. Moreover, there is also a problem of oil splattering due to the high-speed swing of the cam lever.

In Japanese Utility Model Laid-Open No. 59-37378, a guide groove is provided on the tip end side of the opening lever, and a rope is connected to this guide groove. The sliding contact relationship between the bush and the connector as described above is related to the rope and the opening lever. Not between Therefore, refueling is not necessary between the rope and the opening lever.

[Problems to be solved by the device]

However, in the cam mechanism method, it is necessary to connect the opening lever and the cam lever with a connecting bar. Therefore, the sliding connection relationship between the bush and the connector cannot be avoided between the cam lever and the connection lever, and the problem as described above still exists.

It is an object of the present invention to provide an opening device that eliminates the need for refueling between a cam lever and a rope.

[Means for Solving the Problems]

To this end, in the present invention, the latch lever connecting device is attached to the cam lever constituting the cam mechanism, and the latch stopper connecting device is provided with an arc-shaped guide groove along the swing direction of the cam lever, and a rope connected to the heddle frame. Connect to the hook-and-loop connector so as to be joined to this guide groove, and set a guide relationship between the rope and the guide groove so that the straight line part of the rope becomes the tangent line of the guide groove, and connect the rope end part to the hook-and-loop connector. Is reversely joined to the hook-and-tie connecting device, and the reverse joining part is press-contacted and fixed by the first press-contact fixing means, and the rope part further on the tip side than the press-contacting fixed part is bent. The tip side rope portion was pressed and fixed by the second pressing and fixing means.

[Action]

The rope connecting the cam lever and the heddle frame moves following the swing of the cam lever, but this follow movement takes the form of contact and separation that does not slide with respect to the guide groove of the latch connector. Therefore, it is not necessary to supply oil between the cam lever and the rope, and oil splattering due to high-speed rocking of the cam lever is eliminated.

Also, the bending shape of the rope connected to the hook-and-loop connector and
The rope is not pulled out from the hook-and-loop connector due to the fixed pressure contact at the location.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a jack lever 3 is rotatably supported by an opening bracket 2 with both side frames 1 (only one of which is shown) of the loom through a support shaft 3a. A suspension rope 4 is fixed to the portion, and a movable mounting body 5 is fixed to the lower end of the suspension rope 4.

A cam mechanism including a tappet cam 6 and a cam lever 7 that rotate in synchronization with the rotation of the machine base is housed in a cam box 8 on the side of one side frame 1. The contact portion between the tappet cam 6 and the rotor 7a on the cam lever 7 is immersed in the oil in the cam box 8.

One end of a connecting rope 24 is fixed to the outer end of the jack lever 3, and a hanger 25 is attached to the other end of the connecting rope 24.
Is fastened. The hanger bracket 26 is provided on the outer surface of the side frame 1 immediately below the outer end of the jack lever 3.
The hanger bracket 26 and the hanger 25
A tension spring 27 is stretched between and. Therefore,
The rotor 7a of the cam lever 7 is pressed against the tappet cam 6 by the spring action of the tension spring 27, and the rotation of the tappet cam 6 is converted into vertical movement of the movable mount 5. As a result, the heddle frame 20 erected and supported between the movable mounting members 5 moves up and down.

As shown in FIG.
Is fixed by a pair of bolts 10 so that the mounting position can be adjusted, and a pressure contact piece 11 is interposed between the bolt 10 and the cam lever 7. The latch connection tool 9 is sandwiched and fixed between the U-shaped support frame 12, the connection plates 13 and 14 that connect the side plates 12a and 12b of the support frame 12, and the tip parts of the side plates 12a and 12b. The guide plate 15 and the guide plate 15, and the pressure contact piece 11 and the connecting plate 13 are pressed against the side edge of the cam lever 7 by tightening the bolt 10.

As shown in FIG. 3, the left end side of the guide plate 15 has both side plates 12a, 12
Two guide grooves 15a projecting from the gap b and extending from the upper edge to the lower edge on the peripheral edge of the guide plate 15,
15b are installed side by side. A window 15c is provided at the protruding end of the guide plate 15.
The insertion holes 15d, 15e are provided on the lower edges of the guide grooves 15a, 15b so as to be substantially orthogonal to the lower edge guide grooves 15a, 15b and to pass through the window 15c. Has been done. Also, a set screw 16 is attached to the protruding end of the guide plate 15 through the window 15c.
It is screwed to reach.

A window 12c is provided at a position of both side plates 12a and 12b immediately above the connecting plate 14, and a screw hole member 17 is provided on the connecting plate 14 with a window 12c.
It is inserted and placed from. A pair of bolts 18 are screwed into the screw hole member 17 by inserting the connecting plate 14 therethrough. One bolt 18
A pressure contact piece 19 is hooked and supported on the, and the tip side of the blade is arranged between the lower edge of the guide plate 15 and the tips of the pair of bolts 18.

The other ends of the pull-down ropes 21 and 22 fixed to the lower ends of the pair of left and right movable mounts 5 (only one is shown) supporting the heddle frame 20 are wound around and joined to the guide grooves 15a and 15b.
The tips of the pull-down ropes 21, 22 are inserted into the insertion holes 15d, 15e. As a result, the pull-down ropes 21 and 22 are guided to the guide grooves 15a and 15b.
Inversion joining is performed along the direction, and the inversion joining portions 21b and 22b bend the above at a substantially right angle.

The reverse connection portions 21b, 22b of the pull-down ropes 21, 22 on the lower edge of the guide plate 15 are fixed by pressure contact between the pressure contact piece 19 and the guide grooves 15a, 15b by the tightening action of the bolt 18 via the pressure contact piece 19. Also, the pull-down rope 2 in the insertion holes 15d and 15e
The bent insertion portions 21c, 22c of 1, 22 are pressure-contacted and fixed by the tightening action of the set screw 16 via the pressure-contact metal fitting 23 inserted from the window 15c.

At the mounting position of the latch connector 9 shown in FIGS. 1 and 2 to the cam lever 7, the guide grooves 15a and 15b are located at the cam lever 7 side.
It is formed in a circular arc C around the rotation center C ₁ of the rotational center C ₁ over an angular range theta ₁ centered. The angle range θ ₂ is set as the swing angle of the cam lever 7, and when the heald frame 20 is at the lowermost moving position, the linear portions 21a, 2 of the pull-down ropes 21, 22 are set.
Assuming that 2a coincides with the tangent line at the intersection of the left boundary line r ₁ of the angular range θ ₂ and the arc portions of the guide grooves 15a, 15b, the pull-down ropes 21, 2 when the heddle frame 20 is at the uppermost moving position.
Second linear portions 21a, 22a is equal to the tangent at an intersection angle range theta ₂ of the right border r ₂ and the guide groove 15a, an arc portion of 15b. That is, when the cam lever 7 swings, the pull-down rope 2
1,22 moves following this, but pull-down ropes 21,2
2 makes contact with and separates from the guide grooves 15a, 15b within the angular range θ ₂ without sliding contact, and the straight portions 21a, 2 of the pull-down ropes 21, 22 are provided.
2a is always held in the position shown in FIGS.

The contact / separation relationship between the pull-down ropes 21, 22 and the guide plate 15 without sliding contact brings about sure wear avoidance at the contact portion between the pull-down ropes 21, 22 and the guide plate 15, and it is unnecessary to supply oil to these contact portions. .

Therefore, the problems of troublesome refueling maintenance and oil splattering due to the high-speed swing of the cam lever 7 are solved. When oil is dripped and supplied to the sliding contact portion between the bush on the cam lever and the connector, a method of pumping up the oil in the cam box 8 and dropping the oil is usually used, but this embodiment does not require such an oil pumping mechanism. Become.

Further, as shown in FIG. 6, the support frame 12 can be changed up and down along the cam lever 7 by loosening the bolt 10, and the warp opening angle can be changed by this change. Since the radius of the arc C is relatively large, the guide grooves 15a, 15
Even if b deviates from the circular arc C, the vibrations of the pull-down ropes 21 and 22 are extremely small.

In the rope connection configuration between the pull-down ropes 21 and 22 and the latch connection tool 9 which brings the advantage of not requiring refueling, prevention of the pull-down ropes 21 and 22 from coming off is the most important issue, but according to the configuration of this embodiment, It is certain that it will not come off.

Pull-down rope 2 that reverse-joins along the guide grooves 15a and 15b
The inventor of the present application has confirmed by tests that it cannot be surely prevented from being prevented only by press-fitting and fixing the reverse connection parts 21b and 22b of 1,22 by the first press-connecting and fixing means composed of the bolt 18 and the press-connecting piece 11. There is. That is, it is not sufficient to have a bending resistance due to the inverted bending shapes of the pull-down ropes 21 and 22 and a slip-out prevention structure by the pressure contact fixing force of the first pressure contact fixing means. bolt
Although the tightening force of 10 can be increased to increase the pressure fixing force, it cannot be surely prevented from coming off and the rope is unavoidably damaged.

A second slip-out preventing structure is provided in which the tip ends of the inverted joining portions 21b and 22b are bent at a substantially right angle, and the bent insertion portions 21c and 22C are press-fitted and fixed by the second press-fitting and fixing means composed of the set screw 16 and the press-fitting metal fitting 23. The lack of rope fixing force of the first slip-out preventing structure is compensated. Although the pressure contact fixing force by tightening the set screw 16 in the second detachment prevention structure is the same as that of the first pressure contact fixing means, the bending resistance of the bending insertion portions 21c and 22c fixed by the set screw 16 is large. The sum of the slip-out prevention force of the first slip-out prevention structure and the pressure contact fixing force by only the setscrew 16 is still insufficient to prevent slip-out, and the bending resistance of the bending insertion portions 21c and 22c is indispensable. By the cooperation of the bending structure and the pressure contact structure as described above, the pull-out prevention is ensured without causing the rope damage, and the pull-out of the rope from the latch connector 9 is surely eliminated.

Further, a bulge F is generated at a bent portion of the inverted joint portions 21b, 22b and the bent insertion portions 21c, 22c at a substantially right angle, and the bulge F serves as a stopper to increase the rope fixing force.

The present invention is of course not limited to the above-mentioned embodiment, but the embodiments shown in FIGS. 7 to 11 are also possible.

In the embodiment shown in FIG. 7, the press-fitting metal fitting 23 is pressed by the pair of setscrews 16 to the bending insertion portions 21c and 22c of the pull-down ropes 21 and 22. As the number of setscrews 16 increases, the pressure contact fixing force becomes larger than that in the above embodiment.

In the embodiment shown in FIG. 8, one caulking metal fitting 28 is fixed to both the bending insertion portions 21c and 22c, and the caulking metal fitting 28 is fixed to the guide plate 15 under pressure by a set screw 16. The caulking metal fittings 28 fixed to both the bending insertion portions 21c and 22c are inserted through the insertion groove 15f at the lower edge of the guide body 15.

In the embodiment shown in FIG. 9, the caulking metal fittings 29, 30 are individually fixed to the bending insertion portions 21c, 22c, and the caulking metal fittings 29, 30 are fixed to the guide plate 15 by pressure by a pair of setscrews 16. . The lower edge of the guide plate 15 is provided with a pair of insertion grooves 15g, and the bending insertion portions 21c and 22c are passed through the insertion grooves 15g.

Instead of pressing the caulking metal fitting 29 (30) with the setscrew 16 as shown in FIG. 10, the bending insertion parts 21c and 22c are pressed and
The base end of the caulking metal fitting 29 (30) may be brought into contact with the tip of the set screw 16.

In the embodiment of FIG. 11, the guide grooves 15a, 15 at the lower edge of the guide plate 15
A pair of recesses 15h ₁ and 15h ₂ are provided at the bottom of b, and the pull-down rope 21 (22) is attached to each recess 1 by a pair of bolts 31 and 32.
It is bent and pressed into 5h ₁ and 15 ₂ . The bolt 31 serves as a first pressure contact fixing means, and the bolt 32 serves as a second pressure contact fixing means.

In the embodiment shown in FIG. 12, the part of the pull-down rope 21 (22) ahead of the reverse connection part 21b (22b) is located on both side plates 12a of the support frame 12.
It is bent so as to follow the pin 33 installed between the 12b, and the set screw 16 is pressed against this bent portion.

Further, in the present invention, it is not necessary to limit the curved shape of the guide groove to an arc as long as the guide curve allows the rope and the guide groove to come into contact with and separate from each other without sliding contact.

[Effect of device]

As described above in detail, according to the present invention, an arcuate guide groove is provided in the latch stopper along the swinging direction of the cam lever, and the latch coupler so that the rope connected to the heddle frame is joined to the guide groove. The guide relationship is established between the rope and the guide groove so that the linear portion of the rope becomes the tangent to the guide groove, so that the pull-down rope does not follow the cam lever as the cam lever swings. The contact / separation mode is adopted, whereby the need for oil supply in the connection mechanism between the cam lever and the pulling rope is eliminated, and oil splattering is also eliminated. In addition, the rope end portion connected to the hook-and-loop connecting device is reversely joined to the hook-and-tie connecting device, and the reverse joining portion is press-contacted and fixed by the first press-contact fixing means, and the rope portion further on the tip side than the reverse joining portion. Since the bent portion or the rope portion on the tip side of the bent portion is bent and fixed by the second pressure contact fixing means, the rope fixing force due to the cooperation of the bent shape of the rope and the two pressure contact fixing means causes damage to the rope. It is sufficient without bringing about, and thereby an excellent effect that it is possible to surely prevent the rope from coming off from the hook-and-loop connecting tool is exhibited.

[Brief description of drawings]

1 to 6 show an embodiment embodying the present invention.
The drawing is a front view of one side of the opening device, FIG. 2 is an enlarged vertical cross-sectional view of the latch stopper, FIG. 3 is an enlarged plan view of the latch coupler, and FIG. 4 is a line AA of FIG. FIG. 5 is a sectional view, FIG. 5 is a sectional view taken along the line BB in FIG. 2, and FIG. 6 is an enlarged vertical sectional view showing a state in which the attachment position of the latch stopper is changed with respect to the cam lever.
7 to 9 are plan sectional views showing another example of a state in which the bending rope is bent and inserted into the pull-down rope in a pressure-contacted fixed state, and FIGS. 10 to 12 are enlarged front sectional views of main parts showing another example. The cam lever 7, the latch stopper 9, the bolt 10 and the pressure contact piece 11 forming the first pressure contact fixing means, the guide plate 15, the guide grooves 15a and 15b, and the set screw 16 forming the second pressure contact fixing means.
And pressure-bonding metal fittings 23, pull-down ropes 21, 22.

Claims (1)

[Scope of utility model registration request] 1. In a depolarizing opening device for vertically moving a heddle frame by cooperation of a spring force of a tension spring acting on a jack lever and a driving force of a cam mechanism, a latch connecting device is attached to a cam lever constituting the cam mechanism. In addition to mounting, the hook-and-loop connecting tool is provided with an arc-shaped guide groove along the swinging direction of the cam lever, and the rope connected to the heald frame is connected to the hook-and-loop connecting tool so as to be joined to the guide groove. A guide relationship in which the straight line portion of the rope is a tangent to the guide groove is set between and, and the rope end portion connected to the hook-and-loop connecting device is reversely joined to the hook-and-loop connecting device, and this inversion-joining site is The rope portion closer to the tip side than the inverted joint portion is bent by the pressure contact fixing means, and the bent portion or the rope portion closer to the tip end than the inverted portion is subjected to the second pressure contact. Shedding device in a weaving machine and fixedly pressed against a constant section.