JPS62141147A - Heald frame support apparatus in loom - 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 Object of the Invention (Field of Industrial Application) The present invention relates to a heald frame maintenance device for eliminating spring action on the heald frame, which is necessary when replacing the heald frame of a passive opening device. .

(Prior Art) As a warp shedding device, there is a shedding drive mechanism using a cam mechanism and a negative shedding device consisting of a spring, and this negative shedding device generally has the configuration shown in FIG. 7. This configuration is a system in which the heald frame 3 is pulled down against the springs 1 and 2, and the cam lever 5 and the sight stay 6,7 of the heald frame 3 are reciprocated by a cam 4 that rotates in synchronization with the rotation of the machine base. The lower end hook portions 6a, 7a of the rigging 8, 9
One end of the rigging 8.9 is fixed to a hook connecting member 10.11 which is hooked to the lower end hook portions 6a, 7a. Note that 12 and 13 are guide rollers. At the upper end hook portions 6b and 7b of the sight stay 6.7, there is a latching connecting member 14 similar to the latching connecting member 10°11.
．． A rigging 16, 17 is connected via 15,
Jack Leno <-18 biased to rotate by spring 1.2
, 19 to which rigging 16.17 is connected. That is,
The rotational movement of the cam 4 that rotates in synchronization with the machine base is converted into the vertical movement of the heald frame 3, and is caused by the vertical movement of a plurality of heald frames 3. Opening and closing of the warp threads is performed.

By the way, in order to reduce the time required for replacing the warp beam when it becomes necessary to replace it, a work procedure is generally adopted in which the warp threads of a new warp beam are inserted into the heddles and reeds of another heald frame in advance. has been done. That is, by adopting such a work procedure, there is no need to tie the warp threads on the new warp beam side and the warp threads on the woven fabric side one by one, and the time required for replacement work can be shortened. Adopting such a work procedure involves replacing the heald frame all at once. Also, when the number of heald frames to be used changes due to changes in weaving conditions, part of the heald frame is removed or added. When removing or attaching such a heald frame, it is necessary to eliminate the action of the spring 1.2 on the heald frame 3, and one method for this purpose is the
It is disclosed in Publication No. 719. In this conventional means, the springs 1 and 2 are fixed by a leveling device as disclosed in the same publication.
7, the cam levers 5 from all the cams 4 are simultaneously separated from each other to the chain line position shown in FIG. A stopper bin 20 is interposed so as to
By releasing the action of the leveling device, the action of the springs 1, 2 on the heald frame 3 is eliminated.

(Problems to be Solved by the Invention) ``However, the stopper bin 20 is inserted by fitting into a mounting hole provided in the loom frame, and is usually removed from the loom and stored in another location. Therefore, in this type of use, there is a high possibility that the stopper bin 20 will be lost. Moreover, the work of fitting the stopper bin 20 into the mounting hole as described above is complicated, and a decrease in work efficiency is unavoidable.

Structure of the Invention (Means for Solving Problems) Therefore, in the present invention, a stopper member is disposed near a member constituting a connection path between the spring of the passive shedding device and the heald frame, and a stopper member is provided in the vicinity of the member constituting the connection path The stopper member was supported so as to be switchable between two positions: a spring action release position where it could be engaged and a retracted position where it could not be engaged with the connection path forming member.

(Operation) That is, the stopper member is normally held at the retracted position, and the reciprocating movement of the connection path forming member due to the opening/closing opening forming movement is performed without being interfered with by the stopper member. When it becomes necessary to remove or attach the heald frame, the operative connection between the cam mechanism and the heald frame is released by a leveling device such as that disclosed in the above-mentioned prior art publication. Subsequently, the stopper member is switched from the retracted position to the spring action release position, and the stopper member engages with the connecting path forming member to stop receiving the spring action on the connecting path forming member, thereby preventing the spring from acting on the heald frame. The effect is eliminated. Since such a spring action is canceled by a stopper member installed in advance near the connection path, work efficiency is good and there is no fear of loss of the stopper member.

(Example) An example embodying the present invention will be described below based on FIGS. 1 to 4, but the opening device is of the same type as the conventional device shown in FIG. 7, and detailed explanation thereof will be omitted. do.

As shown in FIG. 1, a support shaft 23 is installed between a pair of front and rear support plackets 21 and 22 that are erected on one side frame of the loom, and a plurality of jack levers 18 are rotated on the same shaft 23. They are movably supported side by side. inner surfaces 21a, 22a (first support bracket) 21.22
．． At the upper end of the right side in Figure 2, there is a fitting groove 21b,
22b are formed at the same height, and these fitting grooves 2
1b.

A locking protrusion 1 is provided on the upper edge of each Jasokreha 18 near 22b.
A fitting recess 18b is formed on the left side of the projection 18a.

Channel-shaped guide rails 24 and 25 are fixedly fixed along the vertical direction on the inner surfaces of both support brackets 21 and 22, respectively, and sliders 26 and 27 are slidably fitted into both rails 24 and 25. has been done. A holder shaft 28 is installed and fixed between both sliders 26 and 27, and a rod holder 29 is mounted on the holder shaft 28 corresponding to the inner surface of both support brackets 1-21 and 22.
．． 30 is rotatably but non-slidably suspended and supported. Both rod holders 29.30 have rods 31,
32 is erected and supported, and a stopper pin 33 is erected and supported between the upper ends of both the irons 31 and 32. A torsion spring 34.35 is interposed between the holder shaft 28 and the rod holder 29.30, and both springs 34.35 cause the rod holder 29.30 to move clockwise around the holder shaft 28. is biased to rotate.

Support arms 36, 37 are protruded below both guide rails 24, 25 on the inner surfaces of both support brackets (21, 22), and a shaft (36, 37) is installed and supported between both arms 36, 37. There is. An air cylinder 39 is supported at the center of the coaxial shaft 38, and the tip of its drive rod 39a is rotatably connected to the holder shaft 28. Immediately above both support arms 36, 37, a lower cam slope 40, 41 is formed. The drive rod 39a of the air cylinder 39 is always set at the maximum protruding position shown in Fig. 1.2. The lower end of the rod holder 29.30 is moved to the cam slope 40.4 by the action of the torsion spring 34.35.
It is pressed onto the inner surfaces 22a, 23a slightly above 1.

Such a configuration is similarly provided on the other side frame of the loom, and the following description of the operation will focus only on one side of the jack lever 18.

Now, when it becomes necessary to replace the heald frames 3 due to the replacement of the warp beam, the heights of all the heald frames 3 are first made equal by rotating the machine in a stopped state in the normal or reverse direction. Next is the analogy L'! A leveling device as disclosed in Japanese Utility Model Publication No. 59-31719 is used to separate the cam and the cam lever. In addition, in the example in the above publication, the entire heald frame is moved further downward than the lowest movement position of the heald frame during normal operation, but in this example, the heald frame is moved within the vertical movement range during normal operation. The heald frame is moved down by a predetermined amount from the height position of the heald frame that forms the warp closure.

Due to the separating movement between the cam and the cam lever, the jack lever 18 is rotated to the position shown in FIG. A concave shape is formed that is slightly wider than the diameter of the pin 33 when viewed in the axial direction of the pin 33. In this state, by operating the drive rod 39a of the air cylinder 39 in the retracting direction, the rod holder 29.3
The lower end of 0 is the inner surface 21a of 21.22 (both supporting brackets)
.

22a onto the cam slope 40.41, the stop pin 33 is introduced into the concave shape. Thereafter, when the distance between the cam and the cam lever is reduced by the leveling device, the jack lever 18 rotates counterclockwise around the support shaft 23 due to the action of the spring, and the stopper pin 33 is supported as shown in FIG. It is held between the bracket 21, 22 and the locking protrusion 18a of the jack lever 18. Therefore, the spring action is stopped by the stopper pin 33 via the jack lever 18.
It will not affect.

In this manner, when the spring action on the heald frame 3 is released, the heald frame 3 is removed, and another heald frame, through which the warp threads are inserted, is latched to the latching connection member. After this latching, the distance between the cam and the cam lever is returned to its original value to release the clamping state of the stopper pin 33 between the support bracket 21 and the jack lever 19, and the drive rod 39a of the air cylinder 39 is extended to its maximum extent. The stopper pin 33 returns from the spring release position shown in FIG. 3 to the retracted position shown in FIG.

In this embodiment, the stopper pin 33, which is always held near a member called the jack lever 18 constituting the connection path between the heald frame 3 and the spring, is in a retracted position where it does not engage with the jack lever 18, and the spring is engaged with the jack lever 18. Because it is switched between the action release position and the action release position by mechanical means,
The work of canceling the spring action is carried out efficiently, and naturally there is no risk of losing the stopper pin 33.

The present invention is, of course, not limited to the above-mentioned embodiments, but also includes the embodiments shown in FIGS. 5 and 6, for example.

In the embodiment shown in FIG. 5, a storage recess 42 for storing and holding a stopper pin 33 is formed on the upper end surface of the support bracket 21° 22, and a tension spring 43 whose one end is fixed to the stopper pin 33 is formed. A configuration in which the end is hooked to the support shaft 23 is also possible. That is, the storage recess 42 is connected to the stopper pin 33.
This is the retracted position, and the pin 33 is held in tension within the storage recess 42 by a tension spring 43. When the spring action is released, the stopper pin 33 is moved to the position indicated by the chain line in FIG. Although this embodiment has an extremely simple configuration and is manual, the work to eliminate the spring action is easy, and there is no risk of the stopper pin 33 being lost. Of course, the position of the stopper pin 33 can also be changed by mechanical means.

In the embodiment shown in FIG.
(15) A locking piece 44 is fixed in the middle of the rigging 16 (17) connected to the heald frame. It is located on the side of 3. A recess 47a wider than the diameter of the rigging 16 (17) is formed in the front end surface of the stopper member 47. That is, the stopper member 47 is normally retracted to the position shown by the solid line in the figure, and the projection of the drive rods 45a and 46a moves the stopper member 47 to the chain line position in the figure, and the upper surface of the locking piece 44 is moved to the position indicated by the chain line in the figure. It can engage with the lower surface of the stopper member 47. When the heald frame 3 is moved upward from the position shown in the figure, the spring action is stopped by the stopper member 47 via the locking piece 44, and the spring action on the heald frame 3 is canceled.

Effects of the Invention As detailed above, according to the heald frame maintaining device of the present invention, the stopper member for eliminating the spring action on the heald frame can be eliminated efficiently, and the spring action can be eliminated efficiently. It has this excellent effect.

[Brief explanation of drawings]

1 to 4 show one embodiment embodying the present invention, and the first
The figure is a perspective view of the main part, Figures 2 to 4 are longitudinal cross-sectional views explaining the procedure for eliminating the spring action, Figure 5 is a vertical cross-sectional view showing another example of the present invention, and Figure 6 is a perspective view showing another example. 7 are front views showing the conventional device. Heald frame 3, jack lever 18, 19 and locking piece 44 as connecting path constituent members, stopper pin 33 as a stopper member, stopper member 47°

Claims (1)

[Claims] 1. In a passive opening device that utilizes spring force, a stopper member that eliminates the action of the spring on the heald frame is disposed near the connection path between the spring and the heald frame, and is engageable with a member constituting the connection path. A heald frame maintenance device for a loom, in which the stopper member is supported so as to be switchable between two positions: a spring action release position and a retracted position where it cannot engage with the connection path forming member.