JPH0395021A - Linear conveyor device with brake mechanism - Google Patents

Abstract

PURPOSE:To enable instantaneous and powerful braking even during high speed conveyance without requiring an outer command by providing a brake mechanism with mechanical braking force generated by strong pressure between a brake shoe and a brake pad caused by the gravity of a conveyed article even at the time of the failure of a braking device or power failure. CONSTITUTION:At the travel time, a brake pad 31 provided at the upper part of the one end of a suspension frame 19 is spaced from a brake shoe 4 disposed at the lower face of a guide rail 1, so that mechanical braking force does not work. On the other hand, at the time of facing such unexpected situation as inoperativeness due to the failure of a magnetic braking device or power failure, magnetic floating force between a primary coil 2 and a permanent magnet 17 is lost, and the suspension frame 19 is rotated clockwise around a fulcrum pin 18 by the gravity of suspended load. As a result, the brake pad 31 is brought into strong contact with the brake shoe 4, so that physical braking force is operated, and a travel body 10 stops in due course. Hereupon, the braking force at the time of emergency can be set optionally by the lever ratio between the distances from the pin fulcrum 18 to the center of the brake pad 31 and to a suspension rod 22.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a linear conveyance device based on a magnetic drive principle, and particularly in a linear conveyance device in which a carrier is suspended and conveyed by a hanging rod, automatic operation is performed in the event of an emergency such as a power outage. This paper relates to a conveyance device that has a brake mechanism that brakes the vehicle. [Prior Art] A linear conveyance device driven by a linear motor based on a magnetic drive principle that conveys a carrier suspended or loaded with articles at high speed in order to convey articles quickly and accurately in a factory to improve production efficiency. Technology development has become more active in recent years, and it has come to be used more and more. However, the electromagnetic braking device, which is the braking device for the traveling body of the conveyance device, may become inoperable.
Because there is a risk that the moving object may run out of control, there is a strong demand for linear conveyance equipment equipped with a brake mechanism that can stop the high-speed moving object reliably and urgently even in such cases. [Problem that the invention seeks to solve”? As mentioned above, in linear conveyance equipment, when the electromagnetic braking device of the traveling body breaks down during operation or there is a power outage, or when descending at high speed between two points with a difference in height, This can cause serious safety disasters, not to mention when the transported items are goods, but especially when transporting people, such as on lifts at ski resorts. An object of the present invention is to provide a linear conveyance device that has a mechanical braking mechanism in a separate system even if electromagnetic braking becomes impossible due to a failure or power outage. [Means for Solving the Problems] In order to solve the above problems, in the device of the present invention, a primary coil is arranged on the guide rail side, and a permanent magnet is arranged opposite to the primary coil. In a linear conveyance device having a running body, a running frame having a plurality of pairs of upper and lower rollers disposed in the direction of the guide rail, and an intermediate portion facing each other across the horizontally extending member of the guide rail and capable of rotating around a horizontal axis. a suspension frame supported by pins on the edge of the traveling frame, to which a horizontal frame with permanent magnets is fixed to the upper end of one end, and to which a carrier is pin-connected downward via a suspension rod; The present invention provides a linear conveyance device equipped with a brake mechanism, characterized in that a brake pad is fixed to the other end of the hanging frame opposite to the brake shoe disposed on the lower surface of the guide rail. [Function] When the electromagnetic braking device becomes unusable due to a failure or power outage, the device of the present invention has a C connector installed on the guide rail.
Next, the magnetic levitation mechanism that occurs between the coil and the permanent magnet installed at the top of the traveling body disappears, and the upper roller of the pair of upper and lower rollers installed with the horizontal member of the guide rail in between is transferred. I try to keep driving, but
At the same time, the suspension frame, which is supported by pins on the edge of the traveling frame, rotates around this pin fulcrum due to the gravity of the objects or people in the carrier suspended via the suspension rod, and the brake provided on the opposite side of the carrier is rotated. The pad applies strong pressure to the brake shoes installed on the guide rail, and this friction brakes the running frame. On the other hand, during normal operation, the horizontal frame, which is integrated with the hanging frame, is pulled upward by the linear mechanism, lifting the items on the carrier, and this brake mechanism is released, so there is no problem with running. [Example] Hereinafter, details of an example of the present invention will be described based on the drawings. 1 to 6 show embodiments of the present invention, FIG. 1 is an overall perspective view, FIG. 2 is an enlarged exploded perspective view of main parts, FIG. 3 is an overall side view during running, and FIG. 4 is an overall perspective view. Fig. 5 is a longitudinal sectional view taken along the line v-v in Fig. 3, and Fig. 6 is an overall side view when running on a slope. In the figure, l is a guide rail, 2 is a primary coil, 3 is a horizontal member (flange) of the guide rail, 4 is a brake shoe, lO is a running body, and 1l is a running frame. 12 is an upper roller, 13 is a lower roller, t4 is a side roller, l5 is an arm, 16 is a horizontal frame, l7 is a permanent magnet, 18 is a pin fulcrum, L9 is a hanging frame, 20 is a swing pin, 2l is a joint frame, 22 is a hanging rod, 23 is a carrier, 30
is a stoppa. As shown in the figure, a plurality of primary coils are arranged at equal intervals in the running direction on the lower surface of the upper flange of the guide rail 1 made of H-shaped steel or I-shaped steel. On the other hand, the traveling body 1O is connected to the horizontal member 3 of the guide rail 1, that is, in this embodiment, a pair of upper and lower upper rollers 12. A traveling frame 11 that supports a plurality of lower rollers l3 (in this embodiment, 2 sets x both sides = 4 sets, 8 rollers) rotatably around a horizontal axis, and a pin attached to the lower edge of the traveling frame 11 projecting from the bottom. A suspension frame 19 that is rotatably supported on a fulcrum 18, a horizontal frame 16 and an arm 15 in which a permanent magnet 17 is disposed at a position facing the primary coil 2 and spaced an appropriate distance below the primary coil 2; It is composed of a joint frame 19 in which a frame 18 and an arm 15 are connected at a substantially right angle, and a carrier 23 and a hanging rod 22 are connected to the lower side by a swing pin 20. In addition to the upper roller 12 and the lower roller l3, a side roller l4 is rotatably supported around a vertical axis on the running frame 11, and is disposed so as to abut against the side surface of the flange 3 and transfer, thereby suppressing movement in the horizontal and lateral directions. ing. Further, a stopper 30 that protrudes outward is fixed to the outer surface of the approximately central portion of the traveling frame. The operation of the linear conveyance device of the present invention configured as described above will be explained. Figure 3 shows the running state when energized. An alternating current is applied to the primary coil 2 from the outside to change the polarity of the magnet moment by moment. The traveling frame l1 is moved forward while being magnetically levitated between it and the permanent magnet l7 installed therein. The speed of the traveling body 10 is controlled by the frequency of the alternating current flowing through the primary coil 2 on the track side (guide rail l). When running, as shown in FIG. 3, the permanent magnet l7 is connected to the primary coil 2.
A protruding plate 15a attached to arm l5 so as to be parallel to
The lower surface of the stopper 30 fixed to the traveling frame 11 comes into contact with the upper surface of the suspension frame 11.
The brake pad 3l provided on the upper part of one end of the guide rail 9 is spaced apart from the brake shoe 4 provided on the lower surface of the guide rail 1, so that no mechanical braking force is applied. and,
The conveyed object while traveling is suspended from the carrier 2 via the hanging rod 22.
3 and transported. On the other hand, as shown in FIG. 4, when faced with an unexpected situation such as a failure of the electromagnetic braking device (not shown) or a power outage, the magnetic levitation force between the primary coil 2 and the permanent magnet l7 disappears. Due to the gravity of the hanging load, the hanging frame rotates clockwise in the figure around the fulcrum pin 18, and as a result, the brake pad 31 comes into strong contact with the brake shoe 4, a physical braking force is activated, and the traveling body 10 eventually stops. Stop. The braking force in an emergency can be arbitrarily set by adjusting the lever ratio of the distance from the pin fulcrum 18 to the center point of the brake pad 3l and the hanging rod 22. Although Figures 3 and 4 show the case where the guide rail l is horizontal, it is possible to travel not only horizontally, but also with a tilted guide rail. 6th
The figure shows the case of ascending the inclined guide rail, and the traveling body 1
0, the hanging rod 22 and the carrier 23 are the same as when they are horizontal, so objects can be transported arbitrarily, regardless of whether they are goods or people, and the same braking force works in an emergency, so it is safe. Therefore, it can be safely applied to lifts at ski resorts, etc. In addition, as in this embodiment, in order to use the near motor for driving (traveling) and lift and float the carrier etc. against gravity, in addition to using the magnetic levitation force of the near motor for roller transfer, When using linear motors for both driving (traveling) and floating, make the space between the upper and lower rollers larger than the guide rail flange thickness, provide an appropriate amount of play between the rollers and the flange surface, and use the rollers as an auxiliary motor. It is used for emergency purposes or emergencies (such as during power outages). In addition, it is also possible to use a linear motor only for drive (travel) and use roller support for all gravity support. That is, the device of the present invention has the advantage that it can be used in any of the non-contact type, wheel floating type (contact type), and combined type. Furthermore, instead of the permanent magnet l7, a composite magnet that combines a permanent magnet and an electromagnet may be used. In this case, when the magnetic attraction force of the permanent magnet alone is sufficient to absorb the gravitational force, no current is applied to the electromagnet, and the electromagnet is controlled to compensate for the shortfall. The attractive force of the permanent magnet is 2 of gear 2.
Since it is inversely proportional to the "frL" current, the gap should be controlled as small as possible in order to make the current flowing through the magnet small or O.The gap between the composite magnet and the guide rail is controlled independently based on the information obtained by the optical gap sensor. In addition, if ultra-high speeds that cannot be achieved with wheels and guide rails are particularly required, and therefore magnetic levitation is essential, it is of course possible to use superconductivity for the magnetic levitation force. [Effects of the Invention] ] As explained above, the present invention provides a linear conveyance system equipped with a braking mechanism that utilizes mechanical braking force due to the strong pressure of the brake shoes and brake pads due to the gravity of the conveyed object, even in the event of a failure of the electromagnetic braking device or an emergency such as a power outage. Since it is a device,
Even during high-speed transport, there is no need for external commands and braking can be applied instantly and strongly, resulting in high work safety. In addition, the braking mechanism works not only when traveling horizontally, but also when transporting items up or down slopes, and objects can be transported just as they would when traveling horizontally, making it safe for transporting people such as on ski lifts. It can be used for Furthermore, the present invention has the excellent effect that after an emergency stop following a power outage, the system can be restarted immediately without requiring any external effort once the power is restored.

[Brief explanation of drawings]

1 to 6 show embodiments of the present invention. FIG. 1 is an overall perspective view, FIG. 2 is an enlarged exploded perspective view of main parts, FIG. 3 is an overall side view during running, and FIG. 4 is an overall perspective view. Fig. 5 is a longitudinal sectional view taken along line V-V in Fig. 3, and Fig. 6 is an overall side view when running on a slope. 1... Guide rail, 2... Primary coil, 3
...Horizontal member (flange), 4...Brake shoe, lO...travelling body, l...
Running frame. 12... Upper roller, 3... Lower roller, l4... Side roller, 5... Arm, l6... Horizontal frame, 7... Permanent magnet, l8... Pin fulcrum, 9... ... Hanging frame, 20... Swing pin, l... Joint frame, 2... Hanging rod, 23... Carrier, O... Stopper.

Claims (1)

[Claims] (1) In a linear conveyance device having a running body in which a primary coil is arranged on the guide rail side and a permanent magnet is arranged opposite to the primary coil, the linear conveyor is arranged opposite to each other across the horizontally extending member of the guide rail. A running frame has a plurality of pairs of upper and lower rollers rotatable around a horizontal axis arranged in the direction of the guide rail, and is supported by a pin at the edge of the running frame at the middle part, and a permanent magnet is arranged upward at one end. a suspension frame to which the installed horizontal frame is fixed and a carrier is pin-connected downward via a suspension rod; A linear conveyance device equipped with a brake mechanism characterized by a brake pad fixed on the end side.