JPH0423012B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shedding device for a loom.

Traditionally, the shedding devices for looms were the dobby method,
Either the ja-guard system or the tapepet system was used. When using a dobby type shedding device, the number of repeats (one cycle of the fabric structure) can be set arbitrarily, so it is possible to weave fabrics with complex structures, but on the other hand, the structure of the shedding device is large. The drawback was that the price was extremely high.

Tappet type shedding devices are much more advantageous in terms of price than dobby type shedding devices because their construction is not so large compared to dobby type shedding devices, but the number of repeats is 8 to 9 at most.
Therefore, it had the disadvantage that it was not possible to weave fabrics with complex structures as in the case of the dobby method. Furthermore, when changing the structure of the woven fabric, it is necessary to rearrange the tapepet and its reduction gear, which is a very troublesome task.

Therefore, it is desired to develop an opening device that combines the advantages of the dobby method and the tapepet method.

The present invention has been made with these advantages in mind, and its purpose is to convert the motion of the reciprocating drive shaft into the shedding motion of the heald based on the shedding program. The opening operation is performed reliably, and the number of repeats can be set arbitrarily as in the case of the dobby method.
In addition, unlike the tapepet method, it does not require a large-scale structure, and can be kept as low as the tapet method in terms of price. To provide a shedding device for a loom that does not require the complicated work of rearranging parts.

Hereinafter, an embodiment in which the present invention is embodied in a positive opening device will be described based on FIGS. Engagement grooves 1a and 1b serving as a pair of opposing engagement recesses are provided along the axial direction (that is, provided 180 degrees apart from each other). As shown in FIG. 2, the coaxial shaft 1 includes a rack 4 connected to a crank 3 that rotates once for every two revolutions of the crankshaft (not shown) of the loom, and a pinion 5 fixed to one end of the drive shaft 1. Based on the meshing relationship with the loom, it performs a reciprocating rotation motion that makes half a rotation per revolution of the crankshaft of the loom. In the housing hole 2a on the thick side of the eccentric wheel 2, there is an engagement rod as a locking member which is biased by a spring 6 in a direction away from the drive shaft 1 and can be engaged with the engagement groove 1a. 7 is accommodated. A connecting ring 9 is rotatably fitted on the outer periphery of the eccentric ring 2 via a metal 8 (the metal 8 is press-fitted into the connecting ring 9), and the arm portion 9a of the connecting ring 9 is It is connected to the lower end of a swing lever 11 that is rotatable about a shaft 10. The rotational movement of the swing lever 11 is controlled by a connecting member 12, a connecting link 13, a trading lever 14, a connecting link 15, a connecting bar 16, a pair of angle levers 17, and a pair of connecting rods 18. It is conveyed to frame 19. Note that 20 is a guide member that restricts the direction of movement of the heald 19.

Although not shown, an eccentric wheel 2, an engagement rod 7, and a connecting ring 9 are mounted in parallel on the drive shaft 1, each corresponding to a plurality of healds 19.

A pair of pressing levers 23A, 23B are provided on the left and right sides of the drive shaft 1, which are swingable about shafts 21, 22 and can press the engagement rod 7 through the metal 8.

To explain the operating mechanism of both pressing levers 23A and 23B, 24 is a drive rod that is moved up and down along a guide member 26 by a cam 25 that rotates in synchronization with the crankshaft of the loom, and has a hook portion at its lower end. 24a is formed. Held frame 1
When the cam 9 is in either the upper or lower open state, the peak 25a of the cam 25 is always in contact with the cam follower 24b provided on the drive rod 24, so that the drive rod 24 is in the uppermost moving position. .

In the vicinity of the hook portion 24a, there is a control bar 3 connected to the left end of a lever 29 which is biased to rotate counterclockwise around a shaft 27 by a spring 28.
0, and a hook portion 30a that can engage with the hook portion 24a is formed at its upper end. Note that 40 is a stopper that restricts the rotation of the lever 29. The control bar 30 is connected to the spring 3
1 biases the hook portion 30a in a direction in which it can engage with the hook portion 24a (leftward in FIG. 1). Further, the bar 30 is actuated based on an operation command from a control device 32 that issues a command according to an opening program to move the heald frame 19 from a lower open state to an upper open state or from an upper open state to a lower open state as necessary. electromagnetic solenoid 33 operated by
This allows the hook portion 30a to move in the direction of separation from the hook portion 24a (to the right in FIG. 1) against the biasing force of the spring 31. or,
Both hook portions 24a, 30a are always engaged and disengaged when the drive rod 24 is in its lowest position (ie, the electromagnetic solenoid 33 is energized or deenergized).

Only when both the hook portions 24a, 30a are in the engaged state and the drive rod 24 is in the uppermost position, the lever 29 is moved against the biasing force of the spring 28, as shown in FIGS. The lever 29 is rotated clockwise, and the lever 29 is rotated through links 34 and 35 that connect the right end of the lever 29 and the pressing lever 23A, and the left end of the lever 29 and the pressing lever 23B. Pressing levers 23A, 23
As shown in FIGS. 1 and 4, the engagement rod 7 is moved into the engagement grooves 1a and 1 against the biasing force of the spring 6.
b is in a press-engaged state.

Next, regarding the embodiment configured as described above,
The effect will be explained.

Now, as shown in FIG. 1, when the engagement rod 7 is on the pressing lever 23A side, the connecting ring 9 is closest to the swing lever 11 side, and the heald frame 19 is in the downward open state. In this state, the drive rod 24 at the highest moving position and the control bar 30 are in a connected state (therefore, the electromagnetic solenoid 33
is in a demagnetized state), the pressing lever 23A resists the biasing force of the spring 6 and moves the engaging rod 7 into the engaging groove 1.
a (the other pressing lever 23B
1), when the reciprocating drive shaft 1 starts to rotate in the direction of arrow P in FIG. 1, the engaging rod in engagement with the engaging groove 1a 7 is about to rotate together with the drive shaft 1. Therefore, the eccentric wheel 2 housing the rod 7 in the housing hole 2a also begins to rotate about the drive shaft 1. That is, the eccentric wheel 2 is locked to the drive shaft 1. In this case, since the engaging rod 7 is completely accommodated in the receiving hole 2a, the tip of the large diameter portion of the engaging rod 7 smoothly moves to the inner circumferential surface of the metal 8.

Furthermore, when the drive rod 24 begins to move downward in synchronization with the start of rotation of the drive shaft 1, the lever 29 is moved by the spring 28 in the direction of the arrow Q in FIG.
rotated in the direction. Then, both pressing levers 23
A, 23B are rotated about shafts 21, 22, respectively, in the direction of arrow R in the figure, and engage grooves 1a, 1b.
The engagement rod 7 is retracted to a position where it is impossible to press the engagement rod 7 into engagement.

As shown in FIG. 3, the connecting wheel 9 is moved toward the pressing lever 23B by the eccentric wheel 2 that rotates integrally with the drive shaft 1, and the swing lever 11 is rotated around the shaft 10. It is rotated in the rotational direction, and the heald frame 19 is moved upward.

If the electromagnetic solenoid 33 is not energized while the drive rod 24 is in the lowest position, the drive rod 24
The connection between the control bar 30 and the control bar 30 is maintained. Therefore,
As shown in FIG. 4, the drive shaft 1 is rotated 180 degrees (at this time, the heald frame 19 is in the upper open state),
When the drive rod 24 is at the highest position, the pressing lever 23B presses the engagement rod 7, and the engagement between the rod 7 and the engagement groove 1a is maintained (that is, the engagement between the drive shaft 1 and the eccentric wheel 2 is maintained). Therefore, when the drive shaft 1 is rotated in the opposite direction (in the direction of the arrow S shown in FIG. The connecting ring 9 is moved to the pressing lever 23A side, and the swing lever 11 is rotated counterclockwise about the shaft 10, and the heald frame 1
9 is moved down.

While the drive rod 24 is in the lowest position, the electromagnetic solenoid 33 is actuated based on the activation command of the control device 32, which issues a command according to the opening program.
When energized, the drive rod 24 and control bar 30
The connection with is canceled. Therefore, as shown in FIG. 5, the lever 29 is held at a position regulated by the stopper 40, and at a position where it is impossible for the pressing lever 23B to press and engage the engaging rod 7 with the engaging groove 1a. is being evacuated to. Therefore, the drive shaft 1
When the engagement rod 7 is rotated 180 degrees, as shown in FIG. 5, the engagement rod 7 is disengaged from the engagement groove 1a by the spring 6, and the lock between the drive shaft 1 and the eccentric wheel 2 is released. Therefore, even if the drive shaft 1 is rotated in the opposite direction (in the direction of arrow S in FIG. 5), the eccentric wheel 2 does not rotate and the connecting wheel 9 does not move. Therefore, the heald frame 19 maintains the upper open state without moving downward.

Even when the heald frame 19 is in the lower open state, if the drive rod 24 and the connecting hook 30 are disconnected, the heald frame 19 maintains the lower open state.

When only the drive shaft 1 is rotating in the direction of arrow S from the state shown in FIG. When the drive rod 24 and control bar 30 are returned to the connected state by the spring 31, the drive shaft 1 is
When the engagement rod 7 rotates 180°, the engagement rod 7 engages the pressing lever 2.
3B, it is pressed into engagement with the engagement groove 1b. Therefore, when the drive shaft 1 rotates in the opposite direction to the arrow S direction, the eccentric wheel 2 also rotates in the same direction, the connecting ring 9 is moved to the pressing lever 23A side, and the heald frame 19 is moved from the top open state to the bottom. Transition to open state.

By the way, the drive shaft 1 of this embodiment reciprocates with a rotation angle of 180 degrees, but every time the coaxial shaft 1 rotates 180 degrees, the rotation of the coaxial shaft 1 is temporarily stopped, and the rotation of the coaxial shaft 1 is always rotated in one direction. A configuration in which it is rotated is also conceivable. However, when the drive shaft 1 is always rotated in one direction, when the engagement rod 7 is engaged with the engagement grooves 1a and 1b, the same rod 7 is always rotated in the engagement grooves 1a and 1b.
It will be strongly pressed against the inner surface of the
(see figure). In other words, even if the drive shaft 1 rotates 180 degrees and once stops, and the engagement rod 7 separates from the engagement grooves 1a and 1b, the rod 7 remains in the engagement groove 1.
The rods 7 are strongly pressed against the inner surfaces of the rods 1a and 1b, making it difficult for the rods 7 to separate from the engagement grooves 1a and 1b. Therefore, when the heald frame 19 must be held in the shifted open state, the engagement rod 7 cannot be disengaged from the engagement grooves 1a and 1b, and the eccentric wheel 2 rotates together with the drive shaft 1. There is a risk that the held frame 19 may be moved. This can be said to be a fatal defect in obtaining the desired woven fabric.

Furthermore, the fact that the engaging rod 7 is difficult to disengage from the engaging grooves 1a, 1b also means that the engaging rod 7 cannot be smoothly engaged with the engaging grooves 1a, 1b. Rod 7, drive shaft 1
wear or damage is likely to occur.

The drive shaft 1 of this embodiment is configured to reciprocate and rotate, and the engagement rod 7 is disengaged from the engagement grooves 1a, 1b at the turn-back position of the drive shaft 1. Therefore, when the drive shaft 1 is rotating, the engagement rod 7 is strongly pressed against the inner surface of the engagement grooves 1a, 1b, but the drive shaft 1 temporarily stops at the folded position and rotates in the opposite direction. When rotation begins, the engagement rod 7 is temporarily released from the pressed state against the inner surfaces of the engagement grooves 1a, 1b. Therefore, the engagement rod 7 can be easily removed from the engagement grooves 1a and 1b, and when the heald frame 19 must be held in the shifted open state, the engagement rod 7 can be easily removed from the engagement grooves 1a and 1b. , 1b, and only the drive shaft 1 rotates. Therefore, the heald frame 19 is not moved and the open state of the heald frame 19 is reliably maintained.

Furthermore, the engagement rod 7 can be smoothly engaged with the engagement grooves 1a and 1b, and wear or damage to the engagement rod 7, drive shaft 1, etc. is unlikely to occur.

Further, in this embodiment, the engagement and disengagement between the engagement rod 7 and the engagement grooves 1a and 1b is controlled by the engagement and disengagement between the drive rod 24 and the control bar 30, and commands are issued according to the opening program. Electromagnetic solenoid 33 actuated by control device 32
By controlling the engagement and disengagement between the drive rod 24 and the connecting hook 30, the number of repeats (one cycle of the fabric structure) can be arbitrarily set by simply changing the shedding program, as in the case of the dobby method. Therefore, it is possible to weave fabrics with complex structures.

In addition, in this embodiment, unlike the tappet system having a reduction gear mechanism, the structure is not large-scale, and the cost can be reduced to the same level as the tappet system. There is no need to perform the complicated work of rearranging parts when reorganizing the warm woven fabric.

Note that the present invention is not limited to the above-mentioned embodiments, and can be modified and embodied as follows, for example.

(1) As shown in FIG. 6, an engagement lever 36 is used as a locking member in place of the engagement rod 7 in the previous embodiment.

When the lever 36 is rotating together with the drive shaft 1, the engagement rod 7 in the above embodiment
Slide on the inner circumferential surface of the metal 8 in the same manner.

(2) As shown in FIG. 7, a pair of left and right levers 42 and 43, to which a pressing pin 41 for pressing the engagement rod 7 is attached, are moved around shafts 44 and 45, respectively, against the connecting ring 9. A reciprocating rod 48 is mounted so as to be rotatable in the clockwise direction, and is reciprocated in the left and right direction by a swing lever 47 that swings left and right as the cam 46 rotates (when the drive shaft 1 rotates 180 degrees, The control device 3
The control rods 49, 5 are moved up and down by the electromagnetic solenoid 33 which is activated based on the command of 2.
0 to engage both levers 42 and 43.

To explain the operation in this embodiment, the seventh
In the figure, the control rod 49 is moved down and the thick plate portion 49a of the rod 49 is interposed between the lever 42 and the engaging portion 48a, and in this state the reciprocating rod 48 is moved to the left and the lever 42 is rotated counterclockwise about the shaft 44, and the pressing pin 41 presses and engages the engagement rod 7 into the engagement groove 1a.

When the control rod 49 is moved upward as shown by the chain line in the figure, the thin plate portion 49b of the rod 49 is interposed between the lever 42 and the engaging portion 48A, and therefore the reciprocating rod 48 is moved upward. Even if it moves to the left (that is, the position of the reciprocating rod 48 shown in the figure), the pressing pin 41 will push the engagement rod 7 into the engagement groove 1.
There is no pressing engagement with a. Also, lever 43
A thick plate portion 50a and a thin plate portion 50b of the control rod 50 are also interposed between the control rod 50 and the engaging portion 48B, and the same effect as described above is performed.

(3) Embodying the present invention in a negative aperture device.

As described above in detail, the present invention makes it possible to easily disengage the locking member from the engagement recess by utilizing the timing of the reciprocally rotating drive shaft at the turn-back position, and to prevent the reciprocating rotational movement of the drive shaft. Since it is possible to convert the shedding motion of the heald based on the shedding program, the shedding motion can be performed reliably according to the shedding program, and the number of repeats can be arbitrarily set as in the case of the dobby method, and in the case of the tapepet method Similarly, it does not have a large-scale configuration, and from the point of view of price, it can be held down to the same level as the tapepet method.
Furthermore, this invention has the advantage of not requiring the complicated work of rearranging parts when reorganizing the woven fabric, which was necessary in the case of the tapepet method, and is thus an excellent invention for industrial use as a shedding device in a loom.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention as a positive opening device, FIG. 2 is a perspective view showing a mechanism for reciprocating the drive shaft, and FIG. Figure 4 is a front view of the main part showing the state in which the drive shaft rotates when engaged with the drive shaft, Figure 4 is a front view of the main part showing the drive shaft rotated 180 degrees, and Figure 5 A front view of the main part showing a state in which the engagement rod is separated from the engagement groove at the folded-back position of the shaft, and FIGS. 6 and 7 are front views of the main part showing other examples of the present invention, respectively. Drive shaft...1, engagement groove as an engagement recess...1
a, 1b, Eccentric wheel...2, Crank...3, Rack...4, Pinion...5, Engagement rod as a locking member...7, Connecting ring...9, Pressing lever...
23A, 23B, control bar...30, control device...32, electromagnetic solenoid...33.

Claims (1)

[Claims] 1. A drive shaft having a pair of opposing engaging recesses and reciprocatingly rotating so that both engaging recesses are alternately reversed is rotatably inserted into an eccentric wheel, A connecting ring connected to a driving force transmission system for moving the heald up and down is rotatably mounted on the outer circumference of the eccentric wheel, and a connecting ring connected to the driving force transmission system for moving the heald up and down is rotatably attached to the outer circumference of the eccentric wheel. A locking member that can be engaged with the engagement recess is attached, and the locking member is biased in a direction to separate from the engagement recess, and further, the drive shaft is rotated at the turn-back position based on the opening program. 1. A shedding device for a loom, comprising an operating mechanism for engaging a locking member in an engagement recess. 2. The shedding device for a loom according to claim 1, wherein the drive shaft performs reciprocating rotational movement based on the meshing relationship between a rack connected to a rotating crank and a pinion fixed to the drive shaft. 3. The shedding device for a loom according to claim 2, wherein the engagement recess is an engagement groove provided along the axial direction on the circumferential surface of the drive shaft. 4. The loom according to claim 3, wherein the locking member is an engagement rod that is accommodated in a housing hole provided on the thick side of the eccentric wheel and is biased in a direction away from the drive shaft. Opening device. 5. The shedding device for a loom according to claim 3, wherein the locking member is an engagement lever provided on the thick side of the eccentric wheel and rotatably biased in a direction to disengage from the engagement recess. 6 The operating mechanism includes a pair of opposing pressing levers,
a lever connected to both levers and biased to rotate in one direction; a control bar connected to the lever;
a drive rod that is moved up and down by a cam and can be connected to the bar; an electromagnetic solenoid that is linked to the control bar and connects and disconnects the bar and the drive rod;
The shedding device for a loom according to claim 1, comprising a control device that issues commands to the solenoid based on a shedding program.