JPH0789614A - Reject device - Google Patents

Abstract

PURPOSE:To provide a reject device capable of joining to a rotor such as a rotary stopper. CONSTITUTION:A rotor 20 having engaging members 34 at equal spaces in circumferential direction is arranged on a side part of a main conveyer 4. A pocket for holding a container holder 2 is formed between two engaging members 34 and an engaging claw 50 capable of engaging with a recessed part 2a formed on the bottom face of the container holder 2 is liftably mounted in the center of them. A cam 71 capable of moving up and down is arranged in a position where the rotor 20 holds the container holder 2 so as to lift the engaging claw 50. The cam is lifted up when a sensor on upstream side detects abnormality of a container 1 and the engaging claw 50 is engaged with the recessed part 2a of the container holder 2 and it is removed from the main conveyer 4 according to the rotation and moved to a reject conveyer. The cam is dropped down so that the engaging claw 50 may not be engaged with the container holder 2 when the container 1 is normal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reject device for selecting and excluding a part of articles that are continuously conveyed.

[0002]

2. Description of the Related Art For example, in a container processing line including a filler (filling machine), a capper, etc., after the liquid is filled into the container, the capped container is not fitted with a cap or the cap is tightened. When there is a defect such as insufficient torque, this defective product must be removed from the regular transfer line. Therefore, a mechanism for rejecting a defective product is provided in the outlet star wheel disposed on the outlet side of such a container processing line, or a separate reject device is provided near the outlet star wheel. There is.

The reject mechanism provided in the exit star wheel is as follows: (1) Containers are formed in the outer peripheral surface of the star wheel at equal intervals and each pocket (recess) for holding and transferring the container therein. Provide a gripper consisting of a pair of gripping pieces that can be held from both sides, and in the case of a normal container, open the gripper on the conveyor to convey it to the next step, and for a specific container such as a defective container, , With the gripper holding the container in between and removing it from the normal transport route so that it can be placed on the table for rejection (No. 58-16992), (2) One side of the star wheel pocket A rotatable clamp is provided in the portion, and the container can be held by the clamp and the side surface of the pocket. The container held by the clamp is not held by the clamp. To another conveyor and conveyor vessels are discharged, those to forward while clamped (JP-B-62-33168) and the like are already known. Further, there are conventionally known ones in which a defective container is removed by swinging a lever provided in the vicinity of an exit star wheel, or those in which a defective container is pushed out and eliminated.

[0004]

However, in a structure in which a gripper consisting of a pair of swinging members or a rotating clamp is provided in each pocket of the star wheel, a space for swinging these members is required. Therefore, if the articles being conveyed are in contact with each other,
If it is very close, it cannot be applied. In particular, when the container handled by the container processing line as described above is a deformed container such as a flat container, it is accommodated in a container holder (or container carrier) for positioning and centering so that the container is transported. Has become
When discharging such container holders by a rotary type wheel that conveys them continuously, install the gripper inside the wheel or arrange a separate lever because the pitch between the container holders is extremely small. Was impossible. Further, in a push-out type reject device such as a cylinder, there is a possibility that trouble such as liquid splashing may occur when the container is pressed and moved.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and provides a rejecting device which can be incorporated in a rotary type conveying means for conveying a large number of articles continuously with almost no gap. That is the purpose.

[0006]

A rejecting device according to the present invention includes a rotating body arranged along a conveyance path of articles,
Article holders that are provided on the outer circumference of this rotating body at equal intervals in the circumferential direction and that hold and transfer the articles on the transport path, and the engagements that are provided on each article holder and are formed on the bottom surface of the article. And an elevating means for moving the engaging means up and down between an ascending position that engages with the engaging part of the article and a descending position that does not engage the engaging part. With respect to a specific article on the path, the article is excluded from the transport path by raising the engaging means to engage the engaging portion of the article.

[0007]

In the above rejecting device, since the engaging means is moved up and down to engage with the lower surface side of the article to be removed, the installation space for the engaging means may be small, and therefore the interval between the articles is extremely small. It can also be incorporated in a rotary body such as a rotary stopper that is continuously conveyed in a state or in a state of contact.

[0008]

The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a plan view of a reject device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, in which a container holder 2 accommodating and holding a container 1 is continuously conveyed. A pair of rotating bodies 20, 3 are provided on both sides of the conveyor 4.
A rotary stopper consisting of 0 (generally indicated by reference numeral 10) is provided, and one of these two rotating bodies (left side in the figure) 2
0, when the container 1 accommodated in the container holder 2 is a defective product, or when the container 1 is not present in the container holder 2, the container holder 2 is excluded from the main conveyor 4. A reject device 22 is provided to transfer onto the reject conveyor 6 which is orthogonal to the main conveyor 4. A support plate 8 that supports the lower surface of the rejected container holder 2 is arranged below the intersection of the main conveyor 4 and the reject conveyor 6. The container holder 2 used in the apparatus of this embodiment has a width wider than the width of the conveying surface of the main conveyor 4, and is conveyed in a state of protruding to both sides of the main conveyor 4. Further, a concave portion 2a is formed on the lower surface of the portion of the container holder 2 protruding from the main conveyor 4, with which the tip of the engaging claw of the rejecting device 22 described later is engaged.

The rotating body 20 arranged on the right hand (left side in FIG. 1) of the main conveyor 4 traveling in the direction of arrow A in FIG. 1 is provided with a fixed disc 25 extending horizontally in the upper part. A fixed tubular body 24, a rotary shaft 30 rotatably supported in the fixed tubular body 24 via a bush 26 and a thrust bearing 28, and a rotary disc 32 fixed to a lower portion of the rotary shaft 30. A plurality of engaging members 34 provided on the rotating disk 32 at equal intervals in the circumferential direction are provided, and each of these engaging members 34 of the container holder 2 continuously conveyed on the main conveyor 4. The side surface is engaged and the space between the container holders 2 is adjusted to a predetermined size. These container holders 2 are fed into the rotary stopper 10 from the direction of arrow A in FIG. 1 and are normally discharged in the direction of arrow B.

Each engagement member 34 is attached to a cylindrical member 38 fitted around a fulcrum shaft 36, and is rotatable about the fulcrum shaft 36. An arm 40 is fixed to a side portion of the cylindrical member 38 so as to rotate integrally with the engaging member 34. The rotating end of the arm 40 and the center of the rotating disc 32 are moved toward the center. A tension spring 44 is disposed between the arm 40 and the pin 42 provided on the arm 40 to pull the arm 40 toward the center of the rotating body 20. A cam follower 46 is attached to an upper portion of the rotating end of the arm 40, and the cam follower 46 is attached to an outer peripheral cam surface of a disk-shaped cam plate 48 fixed to an intermediate portion of an outer peripheral surface of the fixed cylindrical body 24. By abutting, each engaging member 34 is held substantially in the radial direction.

Each engaging member 3 provided on the rotating disk 32
An engaging claw 50 that constitutes the reject device 22 according to the present invention is provided in the middle of 4. This engaging claw 50 is
As shown in FIG. 3, it is connected to the upper yoke 56 via two stays 52 and 54 penetrating the rotary disc 32. One of the two stays 52 and 54 is slidably supported by a bearing 58 so that it can be moved up and down with respect to the rotating disc 32. Also, the other stay 5
Around the circumference of 2, a compression spring 62 is arranged between the lower surface of the yoke 56 and the upper surface of the block 60 fixed on the rotating disk 32, and always urges the yoke 56 upward. Cam followers 64 and 66 are attached to the inner surface and the outer surface of the yoke 56 (the surface near the center of the rotating body 20 and the outer surface thereof), respectively.

A fixed cylindrical body 2 arranged in the center of the rotating body 20.
4, on the outer circumference of the lower surface of the fixed disk 25 that projects around
An annular cam 68 having a downward cam surface is attached, and a cam follower 66 attached to the outer surface side of the yoke 56 is pushed up by the compression spring 62 and pressed against the annular cam 68. The cam surface of the annular cam 68 is at a raised position at least approximately 90 degrees from the position facing the front of the main conveyor 4,
The outer cam follower 66 is allowed to rise, and the other parts are in the lowered position.
6 is lowered.

Further, the fixed circular plate 25 has the annular cam 6
A circular arc-shaped cutout 25a is provided at a position slightly closer to the inner circumference than 8 from a position slightly upstream from the line L ₁ connecting the centers of the first rotating body 20 and the second rotating body 30 from the upstream side. Are formed. Three air cylinders 70, 72, 74 are arranged above the arcuate notch 25a, and the operating rods of these air cylinders 70, 72, 74 extend into the arcuate notch 25a below. Separated cams 71, 73, and 75 are connected to the respective operating rods, and are moved up and down by the operation of the air cylinders 70, 72, and 74. The radial positions of the split cams 71, 73, and 75 coincide with the position of the cam follower 64 mounted inside the yoke 56. Further, the length of each of the split cams 71, 73, 75 in the circumferential direction is 2 times that of the rotary body 20.
It is shorter than the circumferential length of the pocket (holding portion of the container holder) 77 formed between the one engagement member 34.

The height of the cam surface when the split cams 71, 73, 75 are raised by the operation of the air cylinders 70, 72, 74 is as follows. The height of the cam surface is the main conveyor of the annular cam 68 attached to the outer peripheral edge of the fixed disk 25. The height of the cam surface of the fourth side, that is, the height of the cam surface at the high position, is substantially the same as that of the cam surface when the cam surface is lowered. When the split cams 71, 73, 75 are lowered by the operation of the air cylinders 70, 72, 74, the yoke 56 is lowered against the compression spring 62 via the inner cam follower 64, while the split cams 71, 73, 75 are lowered. , 73, 75 are raised, the yoke 56 can be raised by the force of the compression spring 62. When the yoke 56 rises in this way, the engaging claws 50 connected via the two stays 52 and 54.
Also rises integrally, its tip engages with the recessed portion 2a formed on the lower surface of the container holder 2, and when the yoke 56 descends, the engaging claw 50 descends and its tip and the container holder 2 move. The engagement with the recess 2a on the lower surface is released. The reject device 22 described above includes the engagement claws 50,
Two stays 52, 54, a yoke 56, a compression spring 62,
The cam followers 64, 66 and the air cylinders 70,
72, 74 and split cams 71, 73, 75 and the like. Further, an abnormality (for example, a cap is missing, a cap is capped, etc.) of the container 1 that is accommodated and held in the container holder 2 and is conveyed upstream of the position where the rotary stopper 10 is arranged on the main conveyor 4. A sensor (not shown) for detecting the tightening torque excess or deficiency, the absence of a container, etc. is arranged.
0, 72, 74 are activated by the signal from this sensor.

Main conveyor 4 of the first rotating body 20
The second rotating body 30 is arranged on the opposite side of the pinion. The second rotating body 30 is the reject device 22.
Since it has the same configuration as that of the first rotating body 20 except for, the same reference numerals as those of the first rotating body 20 plus A in FIG. . Both of the rotating bodies 20 and 30 are connected to a drive source (not shown) and are rotationally driven in synchronization, and the corresponding engaging members 34 and 34A of both are the same container on the main conveyor 4. Engage with the holder 2 at the same time.

The operation of the reject device 22 of the rotary stopper 10 having the above structure will be described. The container holders 2 that contain and hold the containers 1 and are continuously conveyed on the main conveyor 4 in the direction of arrow A in FIG.
Engaging the corresponding engaging members 34, 34A of 0, 30,
It is adjusted to a predetermined interval. When there is no abnormality in the container holder 2 and the container 1 housed and held in the container holder 2, a signal from a sensor arranged on the upstream side of the rotary stopper 10 causes three air cylinders 70,
In each of 72 and 74, the operating rod is extended downward to lower the split cams 71, 73 and 75. Therefore, when the cam follower 64 attached to the inside of the yoke 56 of the reject device 22 reaches the front surface of the main conveyor 4, the cam follower 64 comes into contact with the three divided cams 71, 73, 75 and is pushed down to be connected to the yoke 56. Two stays 52,
Since the engaging claw 50 fixed to the lower end of the container 54 is also lowered, it does not engage with the concave portion 2a of the lower surface of the container holder 2 conveyed on the main conveyor 4, and the container holder 2 remains as it is. It is conveyed upward in the direction of arrow B.

When an abnormality is detected in the container 1 or the container holder 2 by a sensor arranged on the upstream side of the rotary stopper 10, the container holder 2 is located at a position where both the rotating bodies 20 and 30 face each other (see FIG. 1). Position of the container holder 2) of the three air cylinders 70, 72, 74 due to the abnormal signal transmitted from the sensor.
To operate the cams 71 and 7 respectively attached
Raise 3,75. Then, the cam follower 64 inside the reject device 22, which has been moved to the above position by the rotation of the rotating body 20, is lifted by the compression spring 62, and the engaging pawl 50 is also lifted integrally, and the recess 2 a on the bottom surface of the container holder 2 is also lifted. Engage with.

As the rejecting device 22 rotates, the container holder 2 engaged with the engaging claw 50 is
It does not go straight on the main conveyor 4 but rotates together with the engaging claw 50. The container holder 2 moves from the main conveyor 4 onto the support plate 8, is further placed on the reject conveyor 6, and is discharged in the direction of arrow C. In this way, when the container holder 2 is rotationally moved with the rotation of the reject device 22, the cam followers 64 inside the reject device 22 cause the split cams 7 of the first air cylinder 70 to move.
Immediately after passing through the lower surface of No. 1 and moving to the lower surface of the split cam 73 attached to the second air cylinder 72, the first air cylinder 70 is immediately activated to lower the split cam 71. If the succeeding container holder 2 of the rejected container holder 2 is normal, the reject device 2
The second engaging claw 50 is carried out on the main conveyor 4 as it is without engaging with the container holder 2. Then the second
The split cam 73 of the air cylinder 71 and the split cam 75 of the third air cylinder 74 are sequentially lowered after the inner cam follower 64 of the reject device 22 has passed with the rotation of the rotating body 20.

As described above, the engaging claw 50 of the rejecting device 22 is arranged below the pocket (container holding portion) 77 formed between the two engaging members 34 of the rotating body 20, and is moved up and down to move the container. Since it engages with the concave portion 2a of the two, it can be applied to articles such as the container holder 2 that are conveyed by the rotating body such as the rotary stopper 10 with almost no space. The reject device 22 is not limited to the container holder 2 and can be applied to other articles. Further, not only when the defective product is detected and eliminated by the sensor, but also when the products conveyed in one row are alternately branched to another conveyor and discharged,
Needless to say, it is only necessary to exclude a part of the articles in the transport path.

[0020]

According to the present invention, an engaging portion is provided at the bottom of an article,
On the other hand, the article holding portion formed on the outer periphery of the rotating body is provided with an engaging means capable of engaging with the engaging portion, and the engaging means is raised for a specific article on the conveyance path. Since the article is excluded from the conveyance path by engaging with the engaging portion of the article, the reject device can be applied to the rotary conveyance means in which the articles are conveyed with a small gap or almost no gap. Can be assembled.

[Brief description of drawings]

FIG. 1 is a plan view showing a cross section of a part of a rotary stopper including a reject device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is a sectional view taken along the line III-III in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Product (container holder) 2a Engagement part (recessed part) 4 Transport path (main conveyor) 20 Rotating body 22 Rejection device 50 Engaging means (engaging claw) 71 Elevating means (cam) 73 Elevating means (cam) 75 Lifting means (cam) 77 Article holding unit (pocket of rotating body)

Claims (1)

[Claims] 1. A rotating body arranged along an article conveying path, and an article holding portion provided on the outer periphery of the rotating body at equal intervals in a circumferential direction and holding and transferring the article on the conveying path. An engaging means that is provided on each article holding section and that can engage with an engaging section formed on the bottom surface of the article, and that this engaging means is associated with a rising position for engaging the engaging section of the article. Elevating means for elevating and lowering to an undesired lowering position, and by raising the engaging means to engage an engaging portion of the article with respect to a specific article on the conveyance path, A reject device characterized by being excluded from the transport path.