JPH0158821B2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention is a method for separating and supplying defective products, such as those with only one cap pin attached, from the caps that are continuously transported by a conveyor. The present invention relates to a separate supply method and device for a cap.

(b) Prior art When feeding a cap attached to the tube end of a fluorescent lamp to the cap device position in the manufacturing process of a fluorescent lamp, conventionally, the direction of the cap pin is regulated by a parallel groove and the cap is moved by gravity. Alternatively, as shown in Japanese Utility Model Application No. 56-104049, a pair of endless belts are arranged parallel to each other, and a mouthpiece is placed in the gap formed between the endless belts. Generally, a method was adopted in which the pin was inserted and then transported to a predetermined position and taken out.

However, as described above, the method of taking out pieces one by one from a chute or conveyor using a separate take-out mechanism has a limit in the supply capacity of the nozzles.
Another problem has been that, after a defective product with a cap, such as one without a cap pin, is supplied onto the chute or conveyor, it becomes difficult to detect and remove such a defective product.

(c) Problems to be Solved by the Present Invention The present invention has been made in view of the above-mentioned problems in the prior art. To provide a method and device capable of simply and quickly separating and supplying a cap by dropping it from a conveyor belt using air pressure without having to stop it.

(d) Means for Solving the Problems One of the inventions of the present application is to guide a cap pin of a straight tube type fluorescent lamp cap between a pair of conveyor belts that are arranged in parallel and move at the same speed. In a method for separating defective products for straight tube fluorescent lamp caps, in which the caps are transferred and a cap that does not have a pair of cap pins is separated during the transfer, one of the pair of conveyor belts is used at the separating position. The support for the cap is stopped, the cap is slid sideways at the separation position, and only when there is a pair of cap pins, the cap is prevented from floating on the other conveyor belt side, and air is removed from the upper surface of the cap at the separation position. The device is configured to spray the cap to cause the cap to slide sideways to release the cap from floating, thereby ejecting the cap that does not have a pair of cap pins from the conveyor belt.

Another invention of the present application is to guide and transfer a cap pin of a straight tube type fluorescent lamp cap between a pair of conveyor belts that are arranged in parallel with each other and move at the same speed. In a device for separating defective products for straight tube type fluorescent lamp caps, which separates caps that do not have a cap during transfer, the conveying surface of one of the pair of conveyor belts is separated from the conveying surface of the other conveyor belt at the separation position. is partially lowered, and an upper guide rail is provided above the other conveyor belt at the separation position to prevent the ferrule from floating up, and the conveyor belt is provided with a pair of ferrule pins in the lowered portion. A lower guide rail is provided that supports and guides from below so that the mouthpiece can slide sideways within a range that does not come off the upper guide rail, and a lower guide rail is provided above the conveyor belt at the separation position so that the conveying surface faces toward the lowered part. It is equipped with an injection nozzle that blows air diagonally downward.

(E) Operation In the above configuration, the cap is conveyed by the conveyor belt with the cap pin inserted between the pair of conveyor belts. When the nozzle reaches the separation position, air is blown diagonally downward from the injection nozzle onto the nozzle, and the nozzle, supported by the guide rail, slides toward the side of the conveyor belt where the conveying surface is lowered. If there is a pair of cap pins, the amount of sideways slipping of the cap will be small and the cap will not come off the upper guide rail, but if there is only one cap pin, the cap will slide sideways and rotate, causing it to move a lot and move away from the upper guide rail. It comes off. As a result, the cap pivots on the guide rail and falls off the conveyor belt.
Also, if there is no cap at all, the air will blow it off to the side of the conveyor belt. Therefore, defective caps can be separated to the side of the conveyor belt while being continuously moved.

(f) Examples Examples of the present invention will be described below with reference to the drawings.

1 and 2, there is shown an apparatus 1 capable of carrying out the method of separating defective products for straight tube type fluorescent lamp caps according to the present invention.

This apparatus 1 includes a belt-type conveyor 2 and a defective product separation mechanism 4 provided in the middle of the conveyor 2 for carrying out the defective product separation method of the present invention.

The conveyor 2 includes a pair of endless conveyor belts 23 and 24 that are arranged in parallel with each other and are circulated in the same direction at the same speed by a common belt pulley 22 that is rotated by a motor 21. As shown in FIGS. 2 and 3, one conveyor belt 24 has two pairs of upper surfaces, or conveying surfaces, at multiple locations A, B, and C (three locations in this embodiment) along the way. Idle belt roller 2
5 and 26 are lower than the conveyance surface of the other conveyor belt 23, and in this part the conveyor belt 2
4 is adapted not to support the cap to be transported. A pair of guide plates 27 and 28 whose upper surfaces are substantially flush with the conveying surface of the conveyor belt 23 are provided at both ends of locations A, B, and C where the conveying surface of the conveyor belt 24 is lowered. The guide plates 27 and 28 are the frame 2 of the conveyor 2.
Fixed to 0.

In the above conveyor, the cap pins (usually there are a pair) p are inserted into the space 29 formed between the pair of conveyor belts 23 and 24, and the cap f is attached to the right end of the pair of conveyor belts (see Fig. 1). and in Figure 2). The pair of conveyor belts 23 and 24 are then moved around in the direction of the arrow x to continuously transport the nozzles f in the same direction.

The defective product separation mechanism 4 that implements the defective product separation method according to the present invention has guide plates 2 at both ends at position A.
7, 28, an upper guide rail 42 arranged at a position corresponding to position A directly above the conveyor belt 23, and an air guide rail 42 arranged adjacent to and parallel to the upper guide rail. Injection pipe 43
As shown in detail in FIG. 4, a large number of injection nozzles 44 (which may be slit-shaped) are attached to the air injection pipe 43 at predetermined intervals for extruding the nozzle.
and an injection nozzle 45 for removing the base attached to approximately the center of the air injection pipe 43.

The distance _w1 between the lower guide rail 41 and the side edge of the conveyor belt 23 is, as shown in FIG.
Between the two conveyor belts 23 and 24
It is larger than w ₂ (w ₂ is a size that allows the cap pin p to fit loosely), so that the cap f can slide sideways. In addition, the upper guide rail 4
2 and the lower guide rail 41 (measured in the horizontal direction) is the distance between the cap _f and the cap pin p until it comes into contact with the lower guide rail 41 as shown in FIG. 6A.
slips sideways and is rotated around a single cap pin p as shown in Figure 6B (this happens in the case of a defective product with only one cap pin attached to the cap). It is determined that the cap f comes off from the upper guide rail 42 at the same time.

As shown in detail in FIG. 5, the extrusion injection nozzle 44 is attached diagonally downward toward the conveyor belt 24 side, that is, the lower guide rail 41 side. In addition, the separation and removal injection nozzle 4
The tip of 5 is in a position where air can be injected onto the upper surface of the end opposite to the upper guide rail 42 side of the cap when the cap f moves to the position shown in FIG. 5C and FIG. 6B, and is directed downward. It's summery.

In this defective product separation mechanism, when the device 1 is operating, pressurized air is constantly supplied to the air injection pipe 43 from an air pressure source (not shown), and the injection nozzle 4
Air is constantly injected from points 4 and 45. Under such a condition, the mouthpiece f is connected to the conveyor belt 23,
24 and is sent to position A, the nozzle first slides laterally (to the left in FIG. 5) by the air blown out from the injection nozzle 44. At this time, when two cap pins p are attached to the cap, the cap slides sideways with the two caps in contact with the lower guide rail 41 as shown in FIG. 5B and FIG. 6A. has stopped, so the right end of the cap (in FIG. 6) is still under the upper guide rail 42. Therefore, air is not blown from the injection nozzle 45 onto the upper surface of the left end of the mouthpiece, and even if air is blown, it will not fall from above the conveyor belt 23 and the lower guide rail 41.
Therefore, the cap is sent downstream by the conveyor belt 23. On the other hand, when only one cap pin p is attached, the cap slides sideways to the left (in FIGS. 5 and 6) and rotates around the cap pin, as shown in FIGS. 5C and 6B. will be shown. Therefore, the right end of the cap f comes off from under the upper guide rail 42, and the upper guide rail no longer prevents rotation. For this reason, the injection nozzle 45
When the air from the nozzle hits the left end of the nozzle, the nozzle is also affected by the air jetted from the injection nozzle 44 and
It rotates as shown in Figure D, falls off the conveyor, and is separated and removed.

Note that a cap without any cap pins will slide sideways and fall from the conveyor 2 as it is. Although the injection nozzle 45 is useful for quickly removing the cap, it is not necessarily necessary if the injection nozzle 44 can separate and remove the cap.

In addition, 6 and 6a at positions B and C have an air injection pipe 61 that blows air onto the upper surface of the cap, and the defective caps are not separated and removed at the separation position and are carried downstream on the conveyor belts 23 and 24. This is a non-defective product separation mechanism that selectively separates and supplies the good product caps that are sent to a subsequent process device, and 7, 7a is a cap feeder that sends the non-defective product caps separated by the non-defective product separation mechanism to the next process device. However, since these are not the gist of the present invention, detailed explanations of the structure and operation will be omitted.

(g) Effects The method for separating defective products according to the present invention performs separation by partially removing support for the caps by one of the pair of conveyor belts and spraying air pressure onto the caps. It is possible to easily and quickly separate out defective products that have not yet been processed without stopping the movement of the cap.

[Brief explanation of drawings]

1 is a schematic plan view of an apparatus capable of carrying out the method of separating defective tube caps according to the present invention, FIG. 2 is a side view of the apparatus of FIG. 1, and FIG. 3 is a schematic plan view of the apparatus of FIG. 1. FIG. 4 is a perspective view showing an air injection pipe and an injection nozzle of a defective product separation mechanism that implements the defective product separation method of the present invention;
5 and 6 are plan views showing the operation of the defective product separation mechanism. 2: Conveyor, 23, 24: Conveyor belt,
4: Defective product separation mechanism, 41: Lower guide rail, 4
2: Upper guide rail, 43: Air injection pipe, 44,
45: Injection nozzle.

Claims (1)

[Scope of Claims] 1. The cap pin of a straight tube type fluorescent lamp is guided between a pair of conveyor belts that are arranged in parallel and move at the same speed, and the cap is transferred. In a method for separating defective products for straight tube fluorescent lamp caps in which a cap that does not have a cap is separated during transfer, support of the cap by one of the pair of conveyor belts is stopped at the separation position, and the cap is removed from the separation position. At the separation position, the nozzle is slid horizontally, and only when there is a pair of nozzle pins, the other conveyor belt side prevents the nozzle from lifting up, and at the separation position, air is blown onto the top surface of the nozzle to cause the nozzle to slide sideways. 1. A method for separating defective caps for straight tube type fluorescent lamps, characterized in that the caps are released from floating, thereby ejecting caps that do not have a pair of cap pins from the conveyor belt. 2. Transfer a cap for a straight tube type fluorescent lamp by guiding the cap pin between a pair of conveyor belts that are arranged in parallel and move at the same speed, and transfer a cap that does not have a pair of cap pins. In a device for separating defective products for straight tube type fluorescent lamp caps that are separated midway, the conveying surface of one of the pair of conveyor belts is partially lower than the conveying surface of the other conveyor belt at the separation position. , an upper guide rail is provided on the upper side of the other conveyor belt at the separation position to prevent the nozzle from floating up, and a lowered portion of the conveying surface has a pair of nozzle pins, so that the nozzle can be attached to the upper guide rail only when the conveyor belt is provided with a pair of nozzle pins. A lower guide rail is provided to support and guide the conveyor belt from below so that it can skid within a range that does not come off the rail, and air is blown diagonally downward above the conveyor belt at the separation position toward the lowered part of the conveying surface. A device for separating defective products from a cap for a straight tube type fluorescent lamp, characterized by being equipped with an injection nozzle.