JPH0556825U - Conveyor screw - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a conveyor screw which is functionally highly reliable without any special adjustment. [Configuration] A sensor 15 is provided at least at one location of the thread groove 12.
Is arranged, and the presence of the container at a predetermined position of the support base 13 is monitored by the sensor.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a conveyor screw of the type described in the preamble of claim 1.

[0002]

[Prior Art]

 Such conveyor screws are used, for example, in devices for conveying containers such as ampoules or bottles. The device described above has, for example, an inspection area, in which the container is inspected for hermeticity. Outside the inspection area, there is a sorting area at a fixed predetermined distance, which corresponds to the distance the container is advanced into a predetermined working cycle of the machine, in which the container tested for hermeticity. Is selected. For this purpose, it is usually indicated whether or not there is a container corresponding to a given distance, in order to prevent unnecessary activation of the sorting device.

Conventionally, a light barrier has been used to identify the containers in the sorting area. The liquid that is enclosed within the container and is released here and there when the container is broken creates dirt that can impair the reliability of the function of the light barrier. In addition, the threads of the conveyor screw are shiny by the container to be transported, so that the resulting reflection causes a malfunction of the light barrier. Whenever the color of the container changes, the light barrier must be adjusted after each.

[0004]

[Effect of the device]

 The conveyor screw of the present invention having the features of claim 1 has high reliability without any special adjustment.

According to the features of the subordinate claims, further advantageous configurations of the conveyor screw according to claim 1 are possible. The simple and positive-acting arrangement of the pole piece and the fact that it cooperates with the signal generator are particularly advantageous. Furthermore, reliability is further enhanced by the fact that the electrical function of the signal generator can be monitored in a simple way by means of the second damping surface.

[0006]

【Example】

 1 and 2 show a conveyor screw 10 having a thread groove 12, by which a container 11 such as an ampoule is transported along a support 13 by means of the thread groove 12. The outer peripheral surface of the conveyor screw 10 which is not provided with the thread groove 12 is referred to as a “screw web” 14. The thread groove 12 is formed so as to have a cross-section approximately half that of the container to be transported.

A stepped hole (21, 22, 23) extending laterally from one location of the thread groove 12 through the conveyor screw 10 and the center point of the conveyor screw is provided in the conveyor screw 10. There is. A spring-loadable protrusion 15 is supported inside the stepped hole (21, 22, 23), and the protrusion 15 is connected to the sensor rod 16. The projection 15 is arranged in the portion 21 having the largest diameter of the stepped hole and extends into the thread groove 12. The sensor rod 16 penetrates the stepped holes (21, 22, 23). The sensor rod 16 projects from the outer peripheral surface of the screw web 14 on the side opposite to the protrusion 15 side. A spring 27 is arranged in the second part 22 in which the diameter of the stepped hole is the second largest, and is supported on the bottom of the second part 22 and the collar 25 of the sensor rod 16. . Due to this spring 27, the projection 15 is loaded with a spring force in the direction of the container 11.

A shallow recess 24 is formed on the outer peripheral surface of the screw web 14 at the end of the stepped hole (21, 22, 23) opposite to the side of the protrusion 15, and the bottom of the shallow recess is formed. A further collar 26 of the sensor rod 16 is supported in the. For ease of assembly, the collar 26 is removably connected to the sensor rod 16 by a pushable locking ring. This collar 26 limits the movement of the stem 15 in the direction in which it is spring-loaded.

In order to protect the spring 27 from contamination, a tube 30 is fitted in the second part 22, which penetrates into the part 21 with the largest diameter. A rubber sleeve 31 is attached to the tube 30 penetrating into the portion 21, and the rubber sleeve further surrounds the connecting surface of the protrusion 15 with the sensor rod 16.

A signal generator 17, for example, a proximity switch is arranged on the side of the conveyor screw 10 opposite to the side of the support base 13, and the signal generator is attenuated by a damping surface 18 formed on the sensor rod 16. To be done. Advantageously, the end surface of the sensor rod 16 projecting from the screen web 14 is used as the damping surface 18.

A further second damping surface 32 is provided behind the damping surface 18 in the same plane as the damping surface 18 as seen in the direction of rotation of the conveyor screw 10, which is also between the projection 15 and the damping surface 18. It is arranged. For this purpose, a metal pin with an end face is inserted into the screw web 14 at a distance of approximately 45 ° from the first damping surface 18.

When the container 11 is present, the protrusion 15 is pushed in, and the damping surface 18 of the sensor rod 16 projects from the outer peripheral surface of the screw web 14. In this position, the proximity switch 17 is damped by the damping surface 18. A pulse is emitted when the proximity switch is decayed and this action is displayed. The pulse is transmitted as a signal to a signal processing device (not shown). The metal pin 32, which acts as a second damping surface, serves to monitor the reliability of the functioning of the proximity switch. For this purpose, the signals of both attenuating surfaces 18 and 32 are combined in a signal processing unit, not shown. Since the above-mentioned second damping surface 32 always emits one signal during one working cycle of the machine, by combining this signal with the signal of the damping surface 18 by an AND circuit, the presence of the container 11 can be obtained. The second damping surface 32 can be arranged at any other position on the outer peripheral surface of the screw web 14.

The pole 15 is arranged at a fixed, predetermined distance associated with the working cycle of the machine from an inspection device not shown in the drawing. If the inspection device detects a defective container, it will be removed in the sorting area located behind it. To that end, it is advantageous to check in advance whether or not the container actually exists. This is done, as already mentioned, by means of a spring-loadable projection 15, which in turn activates the signal generator 17 in the presence of a container. At the same time, the stem 15 can be used for counting the number of containers 11 by adding the signals of the signal generator 17.

[Brief description of drawings]

FIG. 1 is a sectional view of a conveyor screw of the present invention, which is perpendicular to the conveying direction.

FIG. 2 is a partial side view of a conveyor screw.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Conveyor screw 11 Container 12 Thread groove 13 Support stand 14 Screw web 15 Detector (protrusion) 16 Sensor rod 17 Signal generator 18 Damping surface 21 Stepped hole portion 22 Stepped hole portion 23 Stepped hole portion 24 Shallow recess 25 Collar 26 Collar 27 Collar 30 Tube 31 Rubber sleeve 32 Damping surface

Claims (7)

[Scope of utility model registration request] 1. A conveyor screw for transporting a container, comprising at least one thread groove and a support for the container which is spaced from the conveyor screw. In the type in which the above-mentioned container is moved along the support base by the conveyor screw, a sensor (15) is arranged at at least one position of the thread groove (12), and the sensor is mounted on the support base (13). ) A conveyor screw for conveying the container, characterized in that it monitors the presence of the container at a predetermined location of. 2. The sensor is formed by a spring-loaded projection (15) connected to the signal generator (17), wherein the signal generator (15) is activated when the projection (15) is activated. 17. The method according to claim 1, characterized in that 17) emits a signal.
Conveyor screw as described. 3. A spring-loadable projection (15) is connected to a sensor rod (16) extending laterally through the conveyor screw (10) and for supporting the conveyor screw (10). Conveyor screw according to claim 2, characterized in that a proximity switch (17) is provided as a signal generator (17) on the side opposite to the platform (13) side. 4. A proximity switch (17) cooperates with a damping surface (18) formed on the sensor rod (16),
Moreover, the damping surface (18) of the sensor rod (16) is
4. Conveyor screw according to claim 3, characterized in that it is formed by the end face opposite the side of the protrusion (15). 5. The third damping surface (32) is arranged in a plane passing through the protrusion (15) and the damping surface (18), as claimed in claim 3 or 4. Conveyor screw. 6. The second damping surface (32) is the first damping surface (18) when viewed in the direction of rotation of the conveyor screw (10).
6. A conveyor screw according to claim 5, characterized in that it is arranged approximately 45 [deg.] Behind. 7. Conveyor screw according to claim 5 or 6, characterized in that the second damping surface (32) is formed by a metal pin inserted into the outer peripheral surface of the conveyor screw (10).