JP2748030B2 - Rapier loom safety device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a rapier loom that drives a rapier by a dedicated rapier motor so that when an abnormality occurs in the rapier drive system, the rapier is quickly moved out of the warp shed. To a safety device for a rapier loom.

2. Description of the Related Art A rapier loom uses a mechanical weft insertion mechanism called a rapier, so that stable weaving can be performed even when a thick-count weft is used, and has been widely used since ancient times.

The drive of the rapier is usually performed by a drive mechanism mechanically connected to the main shaft of the loom. However, it has been proposed to separate the rapier from the main shaft and drive the rapier independently by a dedicated rapier motor (for example, JP-A-53-106865). According to this, even when the loom is stopped, only the rapier can be driven independently, so that the adjustment work and the repair work of the loom can be easily performed, and a complicated drive mechanism linked with the main shaft is not required. Therefore, there is an advantage that the whole structure is simplified, the moment of inertia of the moving member can be minimized, and it is easy to cope with high-speed operation.

In this manner, even when the rapier is driven independently by the rapier motor, the weft insertion movement maintains a strict synchronous relationship with the main shaft, and the rapier head moves according to a predetermined position pattern corresponding to the loom mechanical angle. There is a need to. That is, the rapier head is inserted into the warp shedding at a predetermined loom mechanical angle, in order to avoid mechanical interference between the warp performing the shedding motion and the reed performing the beating motion.
The rapier motor must be precisely driven and controlled so that the rapier head exactly matches the predetermined position pattern, since the warp must be retracted out of the warp shed before closing.

However, according to the related art, if the synchronous relationship between the rapier and the spindle is broken for some reason, a fatal serious accident may occur. That is, if the rapier head cannot reliably move out of the warp shedding at the predetermined machine angle of the loom, mechanical interference with the reed and the warp shedding occurs, causing damage to important parts such as the rapier, rapier head, reed, and breaking of the warp Or the result of not only completely destroying the weaving function of the loom, but also for the woven fabric during weaving, there is a very high possibility of causing irrecoverable defects. Heretofore, no effective countermeasure for reliably preventing this has been known at all.

Accordingly, an object of the present invention is to provide a power storage device in view of the situation of the related art and, when an abnormality occurs in the rapier drive system, use the mechanical energy stored in the power storage device to generate a rapier. The present invention provides a safety device for a rapier loom which can effectively prevent a serious accident from occurring even when an abnormality occurs in a rapier drive system by forcibly moving the rapier out of the warp shed.

Means for Solving the Problems According to a configuration of the present invention for achieving the above object, an energy storage device that stores mechanical energy and an abnormality in a rapier drive system are detected to release mechanical energy of the energy storage device. Abnormality detection means and, when the rapier drive system is normal, allow the wefting movement of the rapier freely from the energy storage device, and when abnormal, transmit the mechanical energy from the energy storage device to the rapier,
The gist of the present invention is to provide a transmission mechanism for forcibly moving the rapier out of the warp shed.

Further, an enlargement mechanism may be interposed between the energy storage device and the rapier.

In such a configuration, the loom is first operated with sufficiently large mechanical energy stored in the energy storage device. At this time, when the rapier drive system is normal, the transmission mechanism is operated by the energy storage device. , The wefting movement of the rapier is allowed freely, so that the energy storage device is substantially separated from the rapier and can normally perform the weaving operation.

When an abnormality occurs in the rapier drive system, the abnormality detection means
Upon detecting this, the mechanical energy of the energy storage device is released, and the transmission mechanism transmits the mechanical energy to the rapier, causing the rapier to move out of the warp shed. Therefore, the rapier is quickly driven out of the warp shed by the mechanical energy from the energy storage device, and there is no possibility of causing mechanical interference with the reed or the like.

If a spring is used as the energy storage device, it is possible to widely cope with an abnormality of the rapier drive system in a broad sense including a power failure.

If an expansion mechanism is interposed between the energy storage device and the rapier, the momentum of the former can be arbitrarily expanded and transmitted to the latter, so that the rapier reliably moves out of the warp shed as the energy storage device Only a small amount of exercise is needed to make it work.

Embodiment A safety device of a rapier loom comprises an abnormality detecting means 10, a tension spring 21 forming an energy storage device, and a transmission mechanism 30 (FIG. 1).

The rapier R is composed of a rapier head R1 and a rapier band R2 that carries the rapier head R1, and the rapier band R2 is
Sprocket R3 driven by rapier motor M
Is wrapped around. Therefore, when the rapier motor M is driven to rotate in the forward and reverse directions, the rapier R can move into the warp shed (not shown) along the shed S1 formed on the slay (not shown). A reed L is fixed to the slay.

The drive of the rapier motor M is controlled by a rapier motor controller CM. That is, the rapier motor control device
The CM cascades a rapier position pattern generator CM1 and a controller CM2. The output of the encoder EN that detects and outputs the loom mechanical angle θ is input to the former, and the rotation of the rapier motor M is input to the latter. The output of the pulse generator PG for detecting is input. Therefore, the rapier position pattern generator CM1
When the loom machine angle θ is input from the encoder EN, the corresponding target position x ₀ (θ) of the rapier head R1 is generated and input to the controller CM2. Therefore, the controller CM2 determines that the position x of the rapier head R1 is The drive of the rapier motor M can be controlled so that x = x ₀ (θ).

The rapier motor M is a pulse motor, a servo motor with a rotation amount control device, a DC motor, or the like.
It is assumed that a target speed pattern generator for realizing the target position x ₀ (θ) is included. The controller CM2 can realize x = x ₀ (θ) by comparing and controlling the rotation speed v of the rapier motor M from the pulse generator PG and the target speed v ₀ from the target speed pattern generator. it can.

The abnormality detecting means 10 includes the position x of the rapier head R1 from the rapier position detecting means 11 and the rapier position pattern generator CM.
1 and a target position x ₀ is input from the output, is connected to the relay Ry and a solenoid SL. However, the abnormality detecting means 10, when the position x of the rapier head R1 is from the target position x ₀ within a predetermined value, by energizing the relay Ry and a solenoid SL is operated them, | x-x ₀ | a predetermined When the value is exceeded, the relay Ry and the solenoid SL are reset. The normally open contact Rya of the relay Ry is interposed on the input side of the rapier motor M. Also, solenoid SL
Is engaged with a catch 21a that holds the tension spring 21 in an extended state, and the solenoid SL locks the catch 21a in the energized state and releases the catch 21a in the return state.

The transmission mechanism 30 includes a durable flexible cable 31 and a cable 31
An air duct 32 is provided for accommodating the slack portion. The air flow is blown into the air duct 32 in order to constantly blow the entire length of the slack portion of the cord 31 into the air duct 32 (FIG. 1). Arrow A). One end of the cord 31 is connected to the rear end of the rapier band R2, and the other end is connected to the tension spring 21 through the damper member 21b.
The other end of the tension spring 21 is fixed to an appropriate fixing member.

When the rapier drive system including the rapier motor controller CM, the rapier motor M, the sprocket R3, and the rapier band R2 is electrically and mechanically normal, the weft insertion movement of the rapier R by the rapier motor M is performed normally. That is, the position x of the rapier head R1 at this time follows the target position x ₀ (θ) generated by the rapier position pattern generator CM1 corresponding to the loom mechanical angle θ, and the deviation between the two sets a predetermined value. It is controlled not to exceed. Therefore,
At this time, the abnormality detecting means 10 includes the relay Ry and the solenoid SL.
And the solenoid SL, catch 21a
The extension spring 21 is held in an extended state through the.

The slack amount of the cord-like body 31 of the transmission mechanism 30 changes with the weft insertion movement of the rapier R. Therefore, if the length of the cord 31 is determined so that the slack amount remains when the rapier head R1 is at the forward end and the position x is the maximum, the rapier R is irrelevant to the tension spring 21. You can make a weft insertion movement. That is, the transmission mechanism 30 at this time
Is that the slack portion of the cord 31 absorbs the weft insertion movement stroke of the rapier R, thereby allowing the weft insertion movement of the rapier R free from the tension spring 21.

If any abnormality occurs in the rapier drive system, a deviation exceeding a predetermined value occurs between the position x of the rapier head R1 and the target position x ₀ (θ). Ry, solenoid SL is returned.

By the return of the relay Ry, the rapier motor M is disconnected from the rapier motor control device CM. At the same time, solenoid
Since the catch 21a is released by the return of the SL, the tension spring 21 held in the extended state rapidly contracts, and pulls the rear end of the rapier band R2 through the cord-like body 31,
The rapier R can be forcibly moved out of the warp shed. However, the expansion and contraction stroke B of the tension spring 21 is the weft insertion stroke Δx of the rapier R under normal conditions, and the slack amount Δ of the cord 31 when the rapier head R1 is at the forward end.
For y, it is assumed that B ≧ Δx + Δy.

At this time, the tension spring 21 releases the mechanical energy stored in the extended state, and the transmission mechanism 30 transmits this mechanical energy to the rapier R, and can forcibly drive the rapier R out of the warp shed. Things. When the rapier R retreats abruptly, the damper member 21b contacts the rear end of the rapier band R2 to absorb the shock.

In this embodiment, the relay Ry and the solenoid
Since the SL forcibly removes the rapier R when they return to the non-energized state, the SL can operate on the safe side even when a power failure occurs.

Other Embodiments The transmission mechanism 30 may be constituted by a pair of hook members 33a and 33b engaged through a play stroke k (second embodiment).
Figure). For the normal weft insertion movement of the rapier R, the hook member 33a on the side connected to the rapier band R2 moves the weft insertion stroke Δx within the range of the play stroke k.
When the rapier drive system is abnormal, the other hook member 33b is driven by the tension spring 21, so that the hook members 33a and 33b are engaged, thereby forcing the rapier R. It can be moved out of the warp shed.
When the rapier head R1 is at the forward end, the hook members 33a, 3a
If the gap d of 3b is set so that d ≒ 0, k = Δ
Since x + d ≒ Δx, it is sufficient for the extension and contraction stroke B of the tension spring 21 to satisfy B ≧ Δx.

The transmission mechanism 30 includes a movable member 34 having saw teeth 34a, 34a.
And a guide member 35 having a movable hook 35a (FIG. 3). The movable member 34 is a rapier band R2
, And reciprocates inside the guide member 35 with the weft insertion movement of the rapier R. When an abnormality occurs in the rapier drive system and the tension spring 21 contracts, the guide member 35 is pulled. Then, the movable hook 35a protrudes toward the saw teeth 34a, 34a...
R2 can be linked. However, the movable hook 35a
In normal operation, the fixed catch 35c causes the compression spring 35b
Is stored in the guide cylinder 35d in a state where is compressed.

In each of the above embodiments, the tension spring 21 and the transmission mechanism 30
And a suitable enlargement mechanism 40 may be interposed between them.
Figure). The enlargement mechanism 40 is wound around the movable member 41 having sprockets 41a, 41a at both ends, and the sprockets 41a, 41a,
It consists of a chain 42 with both ends fixed to a fixing member 42a,
The tension spring 21 is connected to the movable member 41 while the transmission mechanism
30 is connected to a connection block 42b on the chain 42. Transmission mechanism for the contraction stroke b of the tension spring 21
Since the movement stroke a of 30 can be expanded to a = 2b, a small extension stroke B is sufficient as the tension spring 21. The enlargement mechanism 40 may have any other configuration, and the enlargement ratio e = a / b> 1 may be arbitrarily set.

When the rear end of the rapier band R2 is fixed to the sprocket R3, a rope 36a of a predetermined length is wound around an auxiliary sprocket 36 disposed coaxially with the sprocket R3, and the rope 3
6a may be connected to a tension spring 21 (FIG. 5). At this time, a clutch (not shown) is interposed between the sprocket R3 and the auxiliary sprocket 36, and in a normal state, the clutch is disconnected to allow the wefting movement of the rapier R. The auxiliary sprocket 36 may be forcibly driven by the tension spring 21. Therefore, the clutch at this time corresponds to the transmission mechanism 30 in each of the above-described embodiments. In this embodiment, the enlargement mechanism is also used.
40 can be used together.

The tension spring 21 may be replaced with a spiral spring 22 (FIGS. 6 and 7). The spiral spring 22 that has accumulated mechanical energy releases the mechanical energy by an unillustrated catch and rotates the gear 22a in the event of an abnormality, so that this rotation is transmitted to the sprocket R3 via the auxiliary gear 22b and the clutch 37. And the rapier R can be evicted. At this time, the spiral spring 22 forms an energy storage device, and the clutch 37 corresponds to the transmission mechanism 30. Further, since the gear 22a and the auxiliary gear 22b can arbitrarily expand the amount of rotation of the former and transmit it to the sprocket R3,
This corresponds to the enlargement mechanism 40.

Effect of the Invention As described above, according to the present invention, the energy storage device, the abnormality detecting means, and the transmission mechanism are provided, and when an abnormality occurs in the rapier drive system, the abnormality is detected by the abnormality detecting means. At the same time, the mechanical energy of the energy storage device is released, this mechanical energy is transmitted to the rapier via the transmission mechanism, and the rapier is forcibly moved out of the warp shedding so that the rapier, the reed, the warp shedding, etc. In addition to effectively eliminating the possibility of mechanical interference with the vehicle, it is possible to prevent the occurrence of serious accidents beforehand. In addition, the drive source for evacuation of the rapier uses a mechanical energy storage device. There is an excellent effect that it is possible to effectively deal with all kinds of electrical and mechanical abnormalities.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the overall configuration showing an embodiment. FIG. 2 to FIG. 5 are explanatory diagrams of the main parts showing different embodiments. 6 and 7 show still another embodiment. FIG. 6 is a view showing the configuration of a main part corresponding to FIG. 1, and FIG. 7 is a view corresponding to the arrow X in FIG. R: Rapier 10: Abnormality detection means 30: Transmission mechanism 40: Enlargement mechanism

Claims (2)

(57) [Claims] An energy storage device for storing mechanical energy, abnormality detection means for detecting an abnormality in the rapier drive system and releasing the mechanical energy of the energy storage device, and the storage device when the rapier drive system is normal. A transmission mechanism for transmitting the mechanical energy from the energy storage device to the rapier in the event of an abnormality, while forcibly moving the rapier out of the warp shed. Rapier loom safety equipment. 2. A safety device for a rapier loom according to claim 1, wherein an enlargement mechanism is interposed between said energy storage device and said rapier.