JPH0157172B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for adjusting the tension force of a tension device in a loom, an adjustment device, and an adjustment operating device.

(Prior art) In a loom, a dobby machine (cam machine) is used to pull up a heald frame, for example, to pull up a predetermined warp thread passing through the heald eyes (eyes or mails) of the heald frame, and to separate it from other warp threads. An opening is formed in between for the weft to pass through.

By the way, in the above case, in order to prevent the heald frame from dancing or shaking, a tensioning device is provided to pull the heald frame.

This tensioning device includes a rotatable housing and a lever, the lever and a heald frame that controls the warp threads are connected via a wire, and a tensioning mechanism that tensions the heald frame is interposed between the lever and the housing. The tension mechanism is composed of a pair of brackets at both ends and a spring interposed between the brackets in an elastic manner.

By the way, when changing the number of warp yarns pulled up by the heddle frame, the tension force on the heald frame by the tensioning device is set to a value that will provide optimal weaving conditions, so that the dancing and swaying of the heald frame can be improved. It is necessary to prevent excessive force from being applied to the dobby machine.

To this end, there is a system for adjusting the tensile force of a tensioning device disclosed in Japanese Utility Model Application Laid-Open No. 58-34978. In this method, a support shaft is attached to the bracket, and the support shaft is removably and rotatably supported by a groove-shaped bearing surface formed on the engagement body, and the engagement body is inserted into the engagement recess formed on the lever. They are engaged so that they can be rotated freely and cannot rotate relative to each other. By inverting and engaging the engaging body in the engaging recess, the distance between the line of tension action of the spring and the pivot axis of the lever is changed, and the tensile force is adjusted.

(Problems to be Solved by the Invention) In the conventional tensile force adjusting device, when adjusting the tensile force, the engaging body is inverted with respect to the engaging recess to engage and disengage. Not only that, but also the support axis of the bracket is reversed in the direction perpendicular to the support axis. Therefore, when adjusting the tensile force, it is necessary to remove the support shaft of the bracket from the bearing surface of the engaging body. For this purpose, the bearing surface of the engaging body is shaped like a groove, and the supporting shaft of the bracket is structured so that it can not only move along the circumferential direction of the bearing surface, but also move away from the bearing surface in the radial direction of the shaft.

However, if the support shaft of the bracket can move along the circumferential direction of the bearing surface of the engaging body and can separate in the radial direction of the shaft, the lever of the tension device will swing back and forth at high speed. Therefore, when the swinging direction of the lever is reversed, the support shaft will temporarily separate from the bearing surface of the engaging body due to inertia force, which will not only cause the spring to vibrate and fluctuate the tension, but also cause damage to the spring and bracket. There is a problem in that the connection part with the machine quickly wears out and breaks down early.

In addition, with conventional tension force adjustment devices, it is necessary to work against the tension force of the panel in order to engage and disengage the engaging body from the lever during adjustment, which requires a large amount of force and has poor work efficiency. It was hot.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The first invention is characterized in that the housing 8 is rotatably provided with a lever 13 connected to the heald frame 2, and a spring 22 is attached between the housing 8 side and the lever 13. In this device, an engaging recess 12, 17, 58, 59 is formed in at least one of the housing 8 or the lever 13, a bracket 20 is provided on at least one end side of the spring 22, and the bracket 20 is provided with a bracket 20 on at least one end side of the spring 22. The support shaft 28 is attached, and the engagement body 21 is fitted onto the support shaft 28 so as to surround the entire circumference of the support shaft 28, so that the support shaft 28 and the engagement body 21 are slidably rotatable relative to each other. A plurality of engaging portions 30, 31, 60 are formed in the union 21, and the support shaft 28
Due to the relative rotation between the engaging body 21 and the engaging body 21, these engaging parts 3
0, 31, 60 is selected and the engaging recess 12,
17, 58, and 59 in a relatively unrotatable manner, and the amount of protrusion from the support shaft 28 of each of the engaging portions 30, 31, and 60 is made different so that the spring 22 can be adjusted in expansion and contraction. The feature of the second invention is that the spring 22 of the tensioning device 7 is stretched when adjusting the tensioning force adjusting device of the tensioning device 7 of the heald frame 2 in the loom, and the spring 22 of the tensioning device 7 is expanded. Frame 39 that can be freely installed
A pair of mounting members 41 and 45 are disposed at both ends of the frame 39 in the longitudinal direction and at least one of them is movable in the longitudinal direction of the frame 39, and a base portion is pivotally supported by each of the mounting members 41 and 45, respectively. a pair of links 44 and 50 whose tips are pivotally connected to each other and constitute a toggle mechanism 52, and one link 5.
0 and extends toward the other link 44, a pair of screw shafts 54 extending outward in the longitudinal direction of the frame 39 from each mounting member 41, 45, and A pair of engaging tools 55 are screwed onto the screw shafts 54 so as to be freely retractable in the longitudinal direction, and are removably engaged with each end of the spring 22 so as to be immovable relative to the direction in which the spring 22 extends. It is at the point where it has.

(Function) According to the present invention, each heald frame 2 is pulled downward via the lever 13 and the wire 15 by the elastic force of the spring 22 of each tension mechanism 19 of the tension device 7.

When a predetermined heald frame 2 is pulled up by the dobby machine 5 and the warp passing through the eye 4 of the heald 3 of the heald frame 2 is pulled up, an opening is formed between it and other warp threads through which the different threads pass. A lever 13 connected to the heald frame 2 via a wire 6 rotates about a support shaft 14 as shown by the imaginary line in FIG.

When the lifting of the heald frame 2 by the dobby machine 5 is released, the lever 13 returns to its original position by the elastic force of the spring 22 of the tension mechanism 19 corresponding to the heald frame 2, and the heald frame 2 is lifted up. returns to its original position smoothly.

As described above, since the heald frame 2 is pulled downward by the tensioning device 7, it is possible to prevent the heald frame 2 from dancing or shaking.

By the way, the distance between both brackets 20 of the tensioning mechanism 19 can be adjusted in three stages depending on how each engaging body 21 engages with each engaging recess 12, 17, and the tensile force of the heald frame 2 can be adjusted in three stages. It can be adjusted with

That is, according to the first embodiment of the present invention, the protrusion 1
1 and the lever 13, as shown in FIGS. 4 and 5, the first position in which the first engaging portion 30 of each engaging body 21 is engaged with the engaging recess 12, 17 of the lever 13, respectively; The first engaging part 30 of the engaging body 21 is engaged with one of the engaging recesses 12 and 17, and the second engaging part 31 of the engaging body 21 is engaged with the other, as shown in FIG. In the second position, each engaging body 2 is placed in each engaging recess 12, 17.
The heald frame 2 can take three positions, including a third position in which the second engaging portions 31 of the heald frame 2 are engaged, and as the first position changes to the second and third positions, the heald frame 2 The tensile force can be gradually increased from weak to medium to strong.

When adjusting this tensile force, the operating device 38 shown in FIGS. 8 and 11 to 13 is used.

That is, the outer fitting portion 5 of each engagement tool 55 of the operating device 38
7 is removably fitted onto the hook portion 24 of each bracket 20 of the tensioning device 7 to be adjusted from above, as shown in FIGS. 8 and 9, thereby forming the toggle mechanism 52 into a mountain shape. In this case, if the toggle mechanism 52 does not have a mountain shape, each engagement tool 55 is screwed into a screw shaft 54 to adjust the forward and backward movement.

Then, the lever rod 53 is pushed down around the support shaft 47 to operate the toggle mechanism 52, and the movable mounting member 4
5 to the outside in the longitudinal direction of the frame 39, thereby causing both the engagement tools 55 to be relatively separated, both the brackets 20 of the tensioning mechanism 19 to be relatively separated, and both or one of the engagement bodies 21 to be moved apart from each other. from the protrusion 11 or the engagement recesses 12, 17 of the lever 13.

In this way, the engaging body 21 can be easily disengaged from the engaging recesses 12 and 17 with a small force by the lever action of the lever lever 53 of the operating device 38 and the boosting action of the toggle mechanism 52. Can be done.
Also, by making both the links 44 and 50 of the toggle mechanism 52 straight, the engagement body 21 can be moved into the engagement recess 12,
It is also possible to lock while detached from 17.

Next, the engaging body 21 to be released from the engaging recesses 12, 17 is rotated around the support shaft 28 to align the desired engaging parts 30, 31 with the engaging recesses 12, 17. 53 around the support shaft 47, actuating the toggle mechanism 52, and drawing the movable mounting member 45 inward in the longitudinal direction of the frame 39, thereby bringing both the mounting members 41 and 45 relatively close to each other.
The engaging parts 30 and 31 of the engaging body 21 are connected to the engaging recess 12,
17.

(Example) Hereinafter, the first example of the present invention will be described with reference to FIGS. 1 to 13.
To explain based on the drawings in the figure, in Fig. 2,
1 is a machine frame, 2 is a heald frame in which a large number of healds are arranged side by side, and inside thereof, a large number of vertical healds 3 are arranged in parallel.
An eye (eye or mail) 4 through which the warp threads pass is provided at the center of each heddle 3 in the vertical direction.

A dobby machine (cam machine) 5 is attached to the upper part of the machine frame 1 and connected to both left and right sides of the upper part of the heald frame 2 via wires 6, so that the heald frame 2 can be pulled up.

Reference numeral 7 denotes a pair of left and right tension devices, which are arranged below the heald frame 2 and pull the heald frame 2 downward.

The tensioning device 7 will be explained based on FIGS. 1, 3 to 10, and for convenience of explanation, the right side in FIG. 1 will be referred to as the front side and the left side as the rear side.

Reference numeral 8 denotes a housing, which includes a pair of left and right side plates 9, a connecting member 10 that connects the rear ends of the upper ends of the side plates 9, and the like. As shown in FIG. 4, the connecting member 10 has a large number of upwardly protruding protrusions 11 arranged side by side in the left-right direction, and each protruding part 11 has a U-shaped engagement recess 12 that opens rearward. It is formed.

Reference numeral 13 denotes levers, which are arranged side by side in the left-right direction between both side plates 9 of the housing 8, and are sloped downward at the rear. These levers 13 are rotatably supported by the housing 8 by a support shaft 14 extending in the left and right direction at an intermediate portion in the longitudinal direction. The rear end of each lever 13 is interlocked and connected to each side of the corresponding heald frame 2 via a wire 15. The front part of the lever 13 has a rising part 16 rising upward, and as shown in FIGS. 5 and 6, a U-shaped engagement recess 17 opening forward is formed in the rising part 16. ing.
Reference numeral 18 denotes a stopper for the lever 13, which is disposed between the rear lower ends of both side plates 9.

Reference numeral 19 denotes a tension mechanism, which, as shown in FIG. 8, is interposed in an elastic manner between each protrusion 11 of the connecting member 10 and the rising portion 16 of each lever 13, and is connected to a pair of front and rear brackets. 20, an engaging body 21, a coil spring 22, and the like.

As shown in FIGS. 9 and 10, the bracket 20 consists of a pair of left and right side plates 23, each side plate 2
3 is a hook part 2 which is located on the base side and has a substantially vertical shape;
4, and a support portion 25 projecting substantially horizontally from the center portion of the hook portion 24 in the vertical direction, and has a T-shape. Between the hook portions 24 of both side plates 23,
Five pins 26 extending between the two are arranged in a row in a substantially upward direction. The spacing between the supporting portions 25 of the side plates 23 is larger than the spacing between the hooking portions 24, and the spacing between the supporting portions 25
5 is formed with an inclined portion 27 that approaches the other support portion 25 as it moves toward the base end.

The engagement body 21 has an oval shape and is eccentrically supported between the distal ends of the support portions 25 of the side plates 23 via a support shaft 28 and a bush 29 in the left and right direction so as to be relatively rotatable. Then, among the longitudinal sides of the engagement body 21, the one having a short distance between the longitudinal end and the support shaft 28 and having a small amount of protrusion from the support shaft 28 is defined as a first engagement portion 30; The distance between the longitudinal end and the support shaft 28 is long and the amount of protrusion from the support shaft 28 is large, and the second engaging portion 31 is
Each of the engaging parts 30 and 31 of the engaging body 21 is connected to the protruding part 11
Alternatively, the lever 13 is engaged with the engagement recesses 12 and 17 of the lever 13 in a manner that is relatively unrotatable and detachable.

The engaging body 21 is made of Naron or the like, and the support shaft 28 and the bushing 29 are made of metal, ceramic, etc., and the support shaft 28 made of a rivet or the like is caulked to the bush 29 fitted to the engaging body 21. ing. Further, as shown in FIGS. 7 and 9, axial grooves 34 and 35 are formed in radially symmetrical locations of the support holes 31 and 33 of the support portion 25 and the bush 29, respectively. By engaging these grooves 34 and 35 with the protrusions 36 of the support shaft 28, relative rotation between the support shaft 28 and the support portion 25 or the bush 29 is prevented, and the support shaft 28 due to the relative rotation is prevented. wear is prevented. The relative rotation between the engagement body 21 and the support portion 25 is performed by the rotation between the metal or ceramic bush 29 and the nylon engagement body 21.
As a result, the engaging body 21 surrounds the entire circumference of the support shaft 28, and the outer circumferential diameter of the bushing 29 and the inner circumferential diameter of the engaging body 21 are made approximately equal as shown in the figure.
The relative rotation between the support shaft 28 and the engaging body 21 is in a sliding manner. The relative rotation described above prevents each part from being abnormally worn.

In addition, as shown by the imaginary line in FIG.
An oil reservoir or oil groove 70 may be formed intermittently or over the entire circumference at the axial center of the outer circumferential surface of the engagement body 9 and/or the inner circumferential surface of the engaging body 21 .

In each tension mechanism 19, the number of springs 22 is three, and between the topmost pins 26 of each bracket 20,
Between the pins 26 at the center position in the vertical direction, the lowest pin 2
They are interposed between 6 spaces. At each end of the spring 22,
A locking piece 37 is attached to the pin 26 in a detachable manner. 66 is a cover.

FIGS. 8, 11 to 13 show an operating device 38 for adjusting the tension force, and the operating device 38 will be described next. Reference numeral 39 denotes a frame having a pair of left and right elongated side plates 40, one longitudinal end of each of which is connected by a fixed attachment member 41 via a bolt 42 and a support shaft 43. The fixed mounting member 41 has a concave shape in plan view, and a first link 44 is rotatably supported at its inner end by a support shaft 43 at its base.

A movable mounting member 45 is disposed between the other longitudinal ends of the side plates 40 so as to be movable in the longitudinal direction, and a bolt 46 and a support shaft 47 are inserted through the movable mounting portion 45 in the left-right direction. It is movably inserted into long holes 48 of both side plates 40. The movable mounting member 45 has a convex shape in a plan view, and a second link 50 consisting of a pair of left and right side plates 49 is attached to the inner end of the movable mounting member 45 and supports the support shaft 4 at its base.
It is rotatably supported by 7. 1st/2nd
The tips of both links 44 and 50 are pivotally connected by a support shaft 51, and these links 44 and 50 constitute a toggle mechanism 52.

Reference numeral 53 denotes a lever rod, which is fixed on the upper surface of the second link 50 and extends toward the first link 44 side.

Reference numeral 54 denotes a pair of screw shafts, which are removably screwed into and fixed to each of the mounting members 41, 45.
It extends outward in the longitudinal direction.

Reference numeral 55 denotes an engagement tool, which is fitted onto the outside of each screw shaft 54 so as to be able to move forward and backward, and is releasably fixed by a butterfly bolt 56. An outer fitting part 57 that opens downward and in the longitudinal direction is formed at the lower part of the engagement tool 55, and the outer fitting part 57 opens downward and in the longitudinal direction.
When adjusting the tensile force of the heald frame 2, the outer fitting part 57 is removably fitted to the hook part 24 of the bracket 20 from above, and the relative movement of the outer fitting part 57 to the bracket 29 in the direction of extension of the spring 22 is prevented. This is prevented by the contact between the outer fitting portion 57 and the inclined portion 27 of the bracket 20.

FIG. 14 shows a second embodiment of the present invention,
Rising part 1 of lever (may be protruding part 11) 13
Upper and lower engaging recesses 58 and 59 are formed in 6, and the tensile force of the heald frame 2 of the tensioning mechanism 19 can be adjusted by changing the engaging recesses 58 and 59 that engage the engaging body 21. It is possible.

FIG. 15 shows a third embodiment of the present invention,
The engaging body 21 has three engaging parts 30, first to third,
31 and 60 are formed at equal intervals in the circumferential direction, and the amounts of protrusion of these engaging portions 30, 31, and 60 from the support shaft 28 are all different.

FIG. 16 shows a fourth embodiment of the present invention.
The hook portions 24 of the side plates 23 of the bracket 20 are overlapped, and the pin 26 is cantilevered.

17 and 18 show a fifth embodiment of the present invention, in which a bracket 20 and an engaging body 21 are provided only on one end side of a tension mechanism 19, and a bracket 20 and an engaging body 21 are provided on the other end side. The engaging body 21 is not provided. Grooves 61 that open front to back and laterally are arranged vertically in one side of the protruding part (which may be the rising part 16 of the lever 13), and the other end of the tension mechanism 19 is arranged in these grooves 61. Locking piece 37 on the side
are removably engaged and prevented from coming off by a pin 62. In this case, one engagement tool 55 of the tensile force adjustment operating device 38 is fitted onto the end of the spring 22 and comes into contact with the protrusion 11, thereby preventing the spring 22 from moving in the extension direction. thwarted.

19 and 20 show a comparative example of the present invention, in which the support portions 2 of the side plates 23 of the bracket 20 are
A nut body 53 is provided between the 5 distal ends so as to be rotatable about an axis in the left-right direction. On the other hand, lever 13
A groove 64 into which the nut body 63 is slidably fitted is formed in the front part of the rising part 16 (which may be the protruding part 11). A butterfly bolt 65 is screwed into the nut body 63 so as to be able to move forward and backward, and is brought into contact with the bottom surface of the groove 64, and the tension of the heald frame 2 is adjusted by rotating the butterfly bolt 65. In this case as well, by extending the spring 22 and separating the butterfly bolt 65 from the bottom of the groove 64 using the tension adjustment operating device 38, the butterfly bolt 65 can be easily rotated and the tension can be adjusted. However, as in the above embodiment, the engaging body 21 is attached to the support shaft 28.
Rotating the butterfly bolt is cumbersome to operate, compared to those in which the tension can be adjusted with a single touch by simply rotating the butterfly bolt.

FIG. 21 shows a sixth embodiment of the present invention,
The heald frame 2 is pulled down by the dobby machine 5, and the heald frame 2 is pulled up by the tensioning device 7.

(Effects of the Invention) According to the first invention, when engaging different engaging parts with the lever in order to adjust the tensile force of the tensioning device in a loom, the engaging body is rotated relative to the support shaft and selected. This is done by engaging the engaged portions that are attached to each other, and there is no need to reverse the engaging body around the direction orthogonal to the support axis as in the conventional case. Further, the entire circumference of the support shaft is surrounded by the engaging body, and the relative rotation between the support shaft and the engaging body is in a sliding manner. This prevents the support shaft from separating from the engagement body in the shaft radial direction, and when the lever swings at high speed, the tension of the spring due to separation between the support shaft and the engagement body and the tension between the spring and the bracket are prevented. There are no problems such as damage due to wear of the connecting parts.

According to the second aspect of the invention, adjustment of the tensile force against the tension of the spring can be easily performed with a small force by the action of the lever and the action of the toggle mechanism.

The present invention has the above advantages and is of great practical benefit.

[Brief explanation of drawings]

1 to 13 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of the tensioning device, FIG. 2 is a simplified overall front view, and FIG. 3 is a partial plan view of the tensioning device. ,
Figures 4 and 5 are longitudinal sectional views of the main parts of Figure 1;
Figure 6 is a vertical sectional view of the main parts showing a different posture from Figure 5, Figure 7 is a partial side view of the bracket, and Figure 8 is a side view of a portion of the bracket.
The figure is a side view showing the situation when adjusting the tensile force, each of Figures 9 and 10 is a sectional view taken along the line A-A and B-B of Figure 8, and Figure 11 is a view of Figure 8. Longitudinal cross-sectional view of
FIG. 12 is a plan sectional view of the tensile force adjustment operating device when both links are straight; FIG. 13 is a perspective view thereof;
14 and 15 are longitudinal sectional views of the main parts showing the second and third embodiments of the present invention, and FIG. 16 is a plan sectional view of the main parts showing the fourth embodiment of the invention. 17 and 18 show the fifth embodiment of the present invention, and the first embodiment
Figure 7 is a side view of the main part, Figure 18 is C- in Figure 17.
19 and 20 show a comparative example of the present invention, and FIG. 19 is a longitudinal sectional view of the main part,
Figure 20 is a cross-sectional view taken along the line D-D in Figure 19;
FIG. 1 is an overall simplified front view showing a sixth embodiment of the present invention. 2... Heald frame, 7... Tensioning device, 8... Housing, 12, 17... Engaging recess, 13... Lever, 19... Tensioning mechanism, 20... Bracket, 2
DESCRIPTION OF SYMBOLS 1... Engaging body, 22... Coil spring, 28... Support shaft, 30, 31, 60... First, second, and third engaging portions, 38... Operating device for adjusting tension force, 39...
Frame, 41, 45...Fixed/movable mounting member,
44, 50... first and second links, 52... toggle mechanism, 53... screw rod, 54... screw shaft, 55...
...Engagement tool, 58, 59... Upper and lower engagement recesses.

Claims (1)

[Scope of Claims] 1. A housing 8 in which a lever 13 rotatably connected to the heald frame 2 is provided, and a spring 22 is elastically interposed between the housing 8 side and the lever 13. Alternatively, the engagement recesses 12, 17, 58, 59 are formed in at least one of the levers 13, the bracket 20 is provided on at least one end side of the spring 22, the support shaft 28 is attached to the bracket 20, and the engagement body is attached to the support shaft 28. 21 is fitted around the entire circumference of the support shaft 28, the support shaft 28 and the engagement body 21 are slidably rotatable relative to each other, and the engagement body 21 is provided with a plurality of engagement portions 30, 31, 60. , and the support shaft 28
Due to the relative rotation between the engaging body 21 and the engaging body 21, these engaging parts 3
0, 31, 60 is selected and the engaging recess 12,
17, 58, and 59 in a relatively unrotatable manner, and the amount of protrusion from the support shaft 28 of each of the engaging portions 30, 31, and 60 is made different so that the spring 22 can be adjusted in expansion and contraction. A tension force adjustment device for a tension device in a loom, characterized in that: 2. A frame 39 that extends the spring 22 of the tension device 7 when adjusting the tension adjustment device of the tension device 7 of the heald frame 2 in the loom, and is detachably attached to the spring 22.
A pair of mounting members 41 and 45 are disposed at both ends of the frame 39 in the longitudinal direction and at least one of them is movable in the longitudinal direction of the frame 39, and a base portion is pivotally supported by each of the mounting members 41 and 45, respectively. a pair of links 44 and 50 whose tips are pivotally connected to each other and constitute a toggle mechanism 52, and one link 5.
0 and extends toward the other link 44, a pair of screw shafts 54 extending outward in the longitudinal direction of the frame 39 from each mounting member 41, 45, and each screw. A pair of engaging tools 55 are screwed onto the shafts 54 so as to be freely retractable in the longitudinal direction, and are removably engaged with each end of the spring 22 so as to be immovable relative to the direction of extension of the spring 22. An operating device for adjusting the tensile force of a tensioning device in a loom, characterized in that the operating device has the following features: