JP3176197B2 - Package transport control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a textile factory
The present invention relates to a package transfer control system for efficiently transferring a weaving yarn supply package (hereinafter, simply referred to as a package).

[0002]

2. Description of the Related Art An article conveying system using a linear motor is known (for example, Japanese Patent Application Laid-Open No. Sho 61-66503).
No.).

[0003] In this system, a power line of a truck traveling with a linear motor mounted thereon is divided into a plurality of blocks along a traveling route of the truck, and each block is switched and supplied with power by two inverters having different output frequencies. . Therefore, the truck at this time can travel at a high speed in a block fed from an inverter with a high output frequency, while decelerating at a low speed in a block fed with an inverter with a low output frequency. Therefore, when it is necessary to stop the carriage at a fixed position for unloading, etc., the block including the position is supplied with power by an inverter with a low output frequency, and the other blocks
Power may be supplied by an inverter having a high output frequency.

[0004] In this system, power is supplied to a linear motor mounted on a carriage for each block via a brush.

[0005]

According to the prior art, since the linear motor is mounted on a truck, the truck becomes large and is extremely uneconomical when applied to the transport of small articles such as packages. There was a problem. Note that this system is based on the premise that the truck is stopped and unloaded to prevent excessive impact on the conveyed articles during unloading. On the other hand, the output frequency has to be set so as to realize the very low speed just before the stop, and there is a problem that the overall transport efficiency cannot be improved.

Accordingly, an object of the present invention is to provide a carrier for package conveyance and an unloading even if the carrier is running, by disposing a linear motor along a guide rail in view of the problem of the prior art. Provided is a package transfer control system that, by combining with a receiving device, does not give an excessive impact to a package to be transferred, and further increases overall economy and maximizes transfer efficiency. It is in.

[0007]

In order to achieve the above object, the present invention has a configuration in which a plurality of linear motors arranged along a guide rail and a linear motor are used.
A carrier for transporting the package traveling along the guide rail, a receiving device disposed along the guide rail and unloading the package from the traveling carrier, and a receiving device corresponding to an unloading signal from the receiving device. The gist of the present invention is to provide control means for reducing the traveling speed of the carrier approaching the apparatus.

The control means can lower the excitation frequency of the linear motor immediately upstream of the receiving device or stop the operation of the linear motor immediately upstream of the receiving device.

Further, the control means may have a braking means immediately upstream of the receiving device, and may activate the braking means.

[0010]

According to the structure of the present invention, the linear motor is arranged along the guide rail and drives the carrier for transporting the package traveling along the guide rail. It is possible to reduce the size and weight of the guide rail for supporting the carrier so that the carrier can run. However, it is assumed that the respective linear motors are arranged at predetermined intervals along the guide rail. In addition, the receiving device unloads the package from the traveling carrier, and therefore, the control means controls the receiving device within a minimum necessary range so that the impact applied to the package during unloading is not excessive. What is necessary is just to reduce the traveling speed of the approaching carrier.

The control means reduces the excitation frequency of the linear motor immediately upstream in response to the unloading signal from the receiving device in order to reduce the speed of the carrier approaching the receiving device, or The operation of the linear motor may be stopped.

Further, when the control means has a braking means, the braking means operates in response to the unloading signal from the receiving device, applies a braking to the carrier approaching the receiving device, and sets the traveling speed of the carrier. Can be reduced.

[0013]

Embodiments will be described below with reference to the drawings.

The package transport control system includes a plurality of linear motors 12, 12,... Arranged at predetermined intervals along a guide rail 11, a carrier 13 running along the guide rail 11, and a receiving device 14. (Fig. 1).

Each linear motor 12 is connected to the output of an inverter 21. However, the linear motor 12 immediately upstream of the receiving device 14 is connected to both outputs of the inverters 21 and 22 via the switch 23. Therefore, each linear motor 12 is excited by the inverter 21, and the linear motor 12 immediately upstream of the receiving device 14 can be excited by one of the inverters 21 and 22 by switching the switch 23. it can.

The carrier 13 includes linear motors 12 and 12.
, And can travel along the guide rail 11 (in the direction of arrow K1 in FIG. 1). That is, a secondary conductor (not shown) is mounted on the carrier 13, and when the secondary conductor links with the moving magnetic field from each linear motor 12, each linear motor 12 carries the carrier in accordance with its excitation frequency. 13 can be accelerated.
The carrier 13 is provided with a hook 13a that is bent in an L-shape toward the rear of the carrier 13 in the traveling direction. The hook 13a penetrates a bobbin of the package P to stably suspend the package P. Lower, carrier 1
3 can transport the package P.

The receiving device 14 is disposed along the guide rail 11 and directly below the guide rail 11. The receiving device 14 has a hook 14b erected on a base 14a. The hook 14b can be moved up and down by a linear drive source such as an air cylinder (not shown), and its tip is bent in an inverted L-shape so as to face the traveling direction of the carrier 13. However, when the hook 14b descends, the carrier 13 that is traveling or the carrier 13
Does not interfere with the package P being transported, and
When ascending, the tip assumes a position slightly lower than the hook 13a of the carrier 13. The receiving device 1
4, an external command signal S1 is input.

The receiving device 14 is provided with a sensor 14c for detecting that the hook 14b has been lifted. The output of the sensor 14c is output as an unloading signal S2 to the switch 23.
Is led to.

When receiving the command signal S1, the receiving device 14 raises the hook 14b and waits. At this time, the sensor 14c outputs the unloading signal S2. Then, when the carrier 13 suspending the package P reaches the position of the receiving device 14, the hook 14b penetrates the bobbin of the package P, while the carrier 13 is kept in the receiving device 1 as it is.
4 can be passed through the receiving device 14
Can unload the package P from the traveling carrier 13 via the hook 14b (two-dot chain line in FIG. 1). After unloading the package P in this way, the receiving device 14 lowers the hook 14b and waits until the package P is removed.

On the other hand, when the switch 23 is switched to the inverter 21 side, the carrier 13 is evenly accelerated by the inverters 12, 12,.
The vehicle travels continuously along No. 1 (solid line in FIG. 2). However, FIG.
, The horizontal axis represents the distance L along the guide rail 11, and the vertical axis represents the traveling speed V of the carrier 13. Each time the carrier 13 passes through the position of each linear motor 12,
The running speed V = V determined by the output frequency of the inverter 21, that is, the excitation frequency f1 of each linear motor 12.
This is because it is possible to accelerate evenly to 1. At this time, at the position of the receiving device 14, the carrier 13 has a traveling speed V = V1a <V1. The carrier 13 is a linear motor 1 immediately upstream of the receiving device 14.
This is because some natural deceleration is expected from the position 2 to the position of the receiving device 14.

On the other hand, when the unloading signal S2 from the receiving device 14 is present, the switch 23 switches to the inverter 22 side, and the output frequencies f1 and f2 of the inverters 21 and 22 are Assuming that f1> f2, when the carrier 13 passes through the linear motor 12 immediately upstream of the receiving device 14, the carrier speed V
= V2 <V1 (the dashed line in FIG. 2). That is, at this time, the carrier 13 at the position of the receiving device 14 has a traveling speed V = V2a <V1a,
Therefore, the receiving device 14 determines that the traveling speed V in the steady state is V = V
The package P can be unloaded from the carrier 13 having a traveling speed V = V2a lower than 1a.

Therefore, the switch 23 of FIG.
4, an inverter 22 is connected to the linear motor 12 immediately upstream of the receiving device 14 in place of the inverter 21 in response to the unloading signal S2, and the excitation frequency f of the linear motor 12 is set to f = f2 <f1. As a result, the traveling speed V of the carrier 13 approaching the receiving device 14 becomes V = V2a <
V1a. That is, the switch 23
Together with the inverter 22 form the control means of the present invention. Note that when unloading the package P, the traveling speed V of the carrier 13 at the position of the receiving device 14 =
It is preferable that V2a be maximized by appropriately setting the output frequency f2 of the inverter 22 unless the impact on the package P becomes excessive.

In the above description, the inverters 21, 2
2 are connected to other linear motors 12, 12... Disposed along the guide rail 11 or to the linear motor 12 immediately upstream of the other receiving device 14, so that the output of the Along with a long extension (FIG. 1). Further, the inverters 21 and 22 are connected via the switch 23.
Linear motor 1 immediately upstream of the receiving device 14 connected to the
The number 2 is not limited to one, and may be a plurality of units continuously arranged on the upstream side of the receiving device 14. Further, the linear motor 12 immediately downstream of the receiving device 12 may be disposed in accordance with the position of the receiving device 14. Even if the carrier 13 stops at the position of the receiving device 14, it can be restarted smoothly.

Further, the present invention is not limited to providing one set for a textile factory equipped with a large number of looms, and one set for each group of a plurality of looms, for example, for each row of a loom. You may make it.

[0025]

[Other Embodiments] The linear motor 12 immediately upstream of the receiving device 14 is connected to the inverter 2 without passing through the switch 23.
2 can be connected directly to the output (FIG. 3). However, the unloading signal S2 from the receiving device 14 is input to the inverter 22 at this time, and the inverter 22
The output frequency, that is, the linear motor 12 immediately upstream of the receiving device 14 is determined by the presence or absence of the unloading signal S2.
Can be switched to f = f1, f = f2 <f1.

Each of the linear motors 12 except for the linear motor 12 immediately upstream of the receiving device 14 can be excited by a dedicated inverter 21 (FIG. 4). However, at this time, the linear motor 12 immediately upstream of the receiving device 14 is also excited by the inverter 22 whose output frequency f can be switched by the unloading signal S2.

The linear motor 12 immediately upstream of the receiving device 14 may be excited by a common inverter 21 together with the other linear motors 12, 12,... (FIG. 5). However, at this time, the linear motor 12 immediately upstream of the receiving device 14 is connected to the inverter 21 via a switch 24 which is opened and closed by the unloading signal S2 from the receiving device 14. The switch 24 connects the linear motor 12 to the inverter 21 when there is no unloading signal S2, and disconnects the linear motor 12 from the inverter 21 when there is the unloading signal S2. In the former case, it can pass through the position of the receiving device 14 at high speed, and in the latter case, it can pass through the position of the receiving device 14 at low speed. In the latter case, the carrier 13 is not accelerated by the linear motor 12 immediately upstream, which is separated from the inverter 21, and continuously decelerates naturally after passing through the linear motor 12 further upstream. This is because the traveling speed V = V3a <V2a, and the vehicle passes the position of the receiving device 14 (two-dot chain line in FIG. 2).

The linear motor 12 immediately upstream of the receiving device 14 may be connected to an inverter 22 via a switch 24 (FIG. 6). However, the switch 24 is connected to the receiving device 14
, The output frequency of the inverter 22, that is, the excitation frequency f2 of the linear motor 12 immediately upstream of the receiving device 14 is changed to the excitation frequency of the other linear motors 12, 12,. f2 ≪ f1 for f1 and the carrier 13
The traveling speed V = V4 when passing through the position of the linear motor 12 immediately upstream of the
The speed is set to be lower than V = V3 when the vehicle naturally decelerates from 2 (dotted line in FIG. 2). At this time, the linear motor 12 can actively apply a brake to the carrier 13, and the carrier 13 is further decelerated as compared with the previous embodiment, and the traveling speed V = V4a <.
V3a and can pass through the position of the receiving device 14.

In FIG. 6, the linear motor 12 immediately upstream of the receiving device 14 and the inverter 22 supplying power thereto are replaced with any braking means capable of exerting an appropriate braking force on the carrier 13. The type of operation may be electrical braking such as DC braking, reverse-phase braking, or mechanical braking.

The braking means does not necessarily need to be controlled via the unloading signal S2 from the receiving device 14, including when the linear motor 12 and the inverter 22 are used. Regardless, the braking force may be applied to all the carriers 13 passing therethrough. Therefore, these braking means are, for example,
At the position of the receiving device 14, the guide rail 11 may be bent upward (FIG. 7) to apply a braking force to the carrier 13 by gravity, or the linear motor 12 located immediately upstream of the receiving device 14 may be used. May be arranged far apart (FIG. 8), and between the linear motor 12 and the receiving device 14, the carrier 13 is expected to greatly decelerate naturally. Further, the embodiment shown in FIG. 3 is modified so that the unloading signal S2 input to the inverter 22 is omitted.
The linear motor 12 may be excited by 2 <f1.

Further, all the linear motors 12, 12,... Arranged along the guide rail 11 can be supplied with power by one inverter 22 (FIG. 9). The excitation frequency f of the linear motors 12, 12,.

In the embodiments shown in FIGS. 1 to 6 and 9 described above, the control means controls the receiving device 14 only when unloading the package P from the traveling carrier 13.
The traveling speed V of the carrier 13 is reduced. Conversely, when the empty bobbin is transferred from the receiving device 14 to the carrier 13 in order to collect the used empty bobbin, the traveling speed of the carrier 13 is similarly reduced. V may be reduced. That is, the receiving device 14 can transfer the empty bobbin to the traveling carrier 13 by mounting the empty bobbin and raising the hook 14b.

As the unloading signal S2, instead of outputting from the sensor 14c for detecting that the hook 14b has risen, the command signal S1 for instructing the hook 14b to rise may be used as it is.

[0034]

As described above, according to the present invention, by providing a plurality of linear motors, a carrier for carrying a package, a receiving device, and control means,
Since the carrier does not have a linear motor, it is possible to reduce the weight as much as possible with the guide rails and improve the overall economy.In addition, the receiving device unloads the package from the traveling carrier. When passing through the position of the apparatus, the traveling speed may be reduced to a minimum necessary within a range that does not give an excessive impact to the package via the control means, and therefore, the overall transport efficiency is maximized. There is an excellent effect that can be.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the overall configuration.

FIG. 2 is an operation explanatory diagram.

FIG. 3 is a diagram (1) corresponding to FIG. 1 showing another embodiment.

FIG. 4 is a diagram (2) corresponding to FIG. 1, showing another embodiment.

FIG. 5 is a view (3) corresponding to FIG. 1 showing another embodiment.

FIG. 6 is a view (4) corresponding to FIG. 1 showing another embodiment.

FIG. 7 is a view (5) corresponding to FIG. 1 showing another embodiment.

FIG. 8 is a view (6) corresponding to FIG. 1 showing another embodiment.

FIG. 9 is a view (7) corresponding to FIG. 1 showing another embodiment.

[Explanation of symbols]

 P: Package V: Running speed f, f1, f2: Excitation frequency S2: Unloading signal 11: Guide rail 12: Linear motor 13: Carrier 14: Receiving device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 54/00-54/02 B60L 13/02-13/10 B65G 47/34-47/51 B65G 47 / 60-47/61

Claims (4)

(57) [Claims] 1. A plurality of linear motors arranged along a guide rail, a carrier for driving a package driven by the linear motor and traveling along the guide rail, and arranged along the guide rail. A receiving device for unloading a package from the traveling carrier, and control means for reducing a traveling speed of the carrier approaching the receiving device in response to an unloading signal from the receiving device. Package transport control system. 2. The package transport control system according to claim 1, wherein said control means lowers an excitation frequency of a linear motor immediately upstream of said receiving device. 3. The package transport control system according to claim 1, wherein said control means stops the operation of a linear motor immediately upstream of said receiving device. 4. The package transport control system according to claim 1, wherein said control means has a braking means immediately upstream of said receiving device, and activates said braking means.