JPH0795758A - Emergency brake device for linear carrier - Google Patents

Abstract

PURPOSE:To eliminate the need of any additional component which increases the weight of a carrier by not installing a long and large brake assembly provided with an air bag separately from a rail and eliminating the need of site adjustment for the fitting position of the air bag. CONSTITUTION:A structure in which a frictional resistance is generated between a secondary conductor 31 fitted to a carrier and brake shoe 25 is constructed by fitting two small-sized air cylinders 21 and 22 to the supporting part 24b of a rail 24 where a supporting section 26 exists and the brake shoe 25 so as to connect the front ends of both piston rods 21a and 22a to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a linear transfer brake device, and more particularly to improvement of a vertical emergency brake device in a transfer system to which a linear motor is applied.

[0002]

2. Description of the Related Art FIG. 3 is a sectional elevational view of a conventional linear conveying device equipped with an emergency brake device, and FIG. In the linear transfer device shown in FIGS. 3 and 4, the carrier 2 to which the container 1 is attached has a carrier frame 4 shaped to hold the track rail 3.
Secondary conductor 5 fixed vertically to the carrier frame 4
By the action of the linear motor 6 attached to the vertical surface 3a of the track rail 3, the carrier 2 moves in the horizontal direction (vertical direction to the paper surface in FIG. 3). The track rail 3 is supported by a support portion 12 fixed to a fixed structure 9. A brake shoe 8 is fixed to the tip of an upper arm 4a of the carrier frame 4 to which a stopper pin 7 used for positioning the carrier is attached. On the other hand, a vertical brake assembly 10 having a long structure is bolted to the fixed structure 9, and an airbag 11 elongated in the longitudinal direction is provided (see FIG. 4). If any abnormality such as a failure of the control system occurs here, compressed air is automatically sent to the airbag 11, and the airbag 11 swells as shown by the chain double-dashed line in FIG. The carrier 2 is stopped by frictional resistance.

[0003]

However, the conventional linear carrier device shown in FIG. 3 has the following drawbacks as is apparent from FIG. The vertical brake assembly with airbag must be installed separately from the track rail. The airbag mounting position must be adjusted in the field. The weight of the carrier traveling to attach the brake shoes to the carrier increases.

[0004]

According to the present invention, on a vertical surface of a track rail having a support portion for supporting the track rail,
Between linear motors arranged at regular intervals in the horizontal direction,
Two small air cylinders are mounted vertically in series with the piston rod at right angles to the vertical plane of the track rail,
A brake shoe is attached so that both piston rods are connected by a brake shoe, and when the piston rod extends, the brake shoe has a structure that produces frictional resistance between the brake shoe and the secondary conductor attached to the vertical surface of the carrier. The above problems have been solved.

[0005]

[Operation] When an abnormality such as a failure of the control system occurs while the carrier with the container attached is running, compressed air is automatically sent to the two small air cylinders, the piston rod extends, and the brake shoes are released. The secondary conductor (aluminum plate) attached to the traveling carrier is brought into contact with and pressed, and frictional resistance is generated between them to stop the carrier. On this occasion,
Since the brake shoe is attached to the two piston rods, the brake shoe does not rotate with respect to the piston rod, so that the tightening screw does not loosen, and the air cylinder is bolted to the fixed structure. Since the track rail does not bend due to the reaction of the piston because it is located in the support portion, frictional resistance is effectively generated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a linear transfer device equipped with an emergency braking device according to the present invention will be described with reference to FIGS. FIG. 1 is a sectional elevation view of the linear transport device, and FIG. 2 is a view taken along the line AA of FIG. First, the configuration of this emergency braking device will be described. In FIGS. 1 and 2, the two small air cylinders 21 and 22 are the base plate 23.
Via the track rail 24 in a vertical direction in series with the vertical surface 24a, and the piston rods 21a and 22a are connected to the vertical surface 24a.
It is bolted at a right angle to a. This piston rod 21
One brake shoe 25 is bolted to the tips of a and 22a to connect the piston rods 21a and 22a. As shown in FIGS. 1 and 2, both air cylinders 2
The track rail 24 is bolted to the fixed structure 27 via the support portion 26 at a position where the tracks 1 and 22 are attached. On the other hand, a secondary conductor (aluminum plate) 31 is attached to the vertical surface of the carrier 30 to which the container 29 is attached and faces the brake shoe 25.

Next, the operation of this emergency brake device will be described. When an abnormality such as a failure of the control system occurs, compressed air is automatically sent to the air cylinders 21 and 22, the piston rods 21a and 22a extend to the left in FIG. 1, and the secondary conductor of the traveling carrier 30. The carrier 30 is stopped by contacting and pressing 31 to generate frictional resistance therebetween. In this case, the track rail 2 of the air cylinders 21 and 22
Since the mounting position to 4 is the portion 24b supported by the support portion 26 bolted to the fixed structure 27, the brake shoe 25 effectively presses the secondary conductor 31 without distorting the track rail 24. Generates frictional resistance. In addition, the brake shoe 25 includes two piston rods 21a, 2a.
Since it is bolted to 2a and does not rotate with respect to the piston rod, loosening of the tightening bolt is prevented.

[0008]

Since the emergency brake device for linear transport according to the present invention is constructed as described above, it has the following effects. Since the carrier can be made compact without the need for a long air bag as in the past, the space can be greatly reduced and no on-site mounting adjustment is required. Since the brake shoes are on the track rail side and no additional items are added to the traveling carrier, there is no change in the traveling load.

[Brief description of drawings]

FIG. 1 is a sectional elevation view of an embodiment of a linear transfer device equipped with an emergency braking device according to the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a sectional elevation view of a linear transfer device including a conventional emergency brake device.

FIG. 4 is a reduced partial view taken along arrow A of FIG.

[Explanation of symbols]

 21: Air Cylinder 21a: Piston Rod 22: Air Cylinder 22a: Piston Rod 23: Base Plate 24: Track Rail 24a: Vertical Surface 24b: Support Part 25: Brake Shoe 26: Support Part 27: Fixed Structure 29: Container 30: Carrier 31: Secondary conductor

Claims (1)

[Claims] 1. A linear transport emergency braking device, comprising two small air cylinders mounted on a vertical surface of a track rail, and brake shoes mounted so as to connect piston rod tips of these air cylinders. The second air cylinder is composed of an aluminum plate secondary conductor vertically attached to the carrier, and the two air cylinders are positioned at a track rail portion supported by a support portion fixed to a fixed structure. A unique linear transport emergency braking device.