JPH05286B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

TECHNICAL FIELD The present invention relates to a conveying device used in a manufacturing line for articles, particularly a manufacturing line for continuously manufactured articles.

[Conventional technology]

In a conveying device such as a roller conveyor in an article manufacturing line, each part is usually conveyed at the same speed, so-called line speed. However, if the article is manufactured continuously,
In cases where there is a running cutting machine that cuts items on the production line, if the conveyor is running at line speed, the space between the cut items may remain stuck during conveyance. Therefore, the conveying speed in this part is set faster than the line speed and fast forwarding is performed to create a gap between the articles.

[Problem to be solved by the invention]

By the way, in the above case, the article is flowing at line speed because cutting has not yet been completed, and the article is being fed at a high conveyance speed. If the difference in conveyance speed between the conveyance speed and the subsequent stage is increased so that the distance between the articles cut by the running cutter can be increased, some articles may be damaged due to the speed difference. This is particularly likely to be a problem when the article is long, since the state where the speed difference exists will last for a long time. The present invention has been made in view of the above points, and its purpose is to perform rapid insertion of articles at a speed faster than the line speed, and to prevent damage to the articles. To provide a conveyance device.

[Means to solve the problem]

Therefore, the present invention divides a plurality of conveyance means lined up along the conveyance direction into a plurality of groups, and connects each group of conveyance means to a single motor with variable speed through a clutch. In this way, any group of conveyance means operating at line speed or rapid traverse speed can be set to a free state by releasing the clutch, and the detection means for the conveyed articles disposed at the front stage of each group and the conveyance means at the front stage can be freely set to a free state by releasing the clutch. Based on signals from the device or the preceding processing machine, the operating state of the conveying means is set to line speed or rapid traverse speed, and
The device is provided with a control means for setting an arbitrary group of conveyance means to a free state by releasing the clutch, and this control means is for conveying the conveyed object on the conveyance means at a rapid traverse speed, and also for setting the conveyance means on the conveyance means to a free state by releasing the clutch. The present invention is characterized in that the conveyance means of the group that the object to be conveyed, which is moving at a high speed, comes into contact with, is brought into a free state by releasing the clutch. [Function] According to the present invention, when the article to be conveyed approaches the conveying means, the line speed is applied, once the article to be conveyed is completely transferred onto the conveying means, at the rapid traverse speed, and during the rapid traverse, the next line speed is applied. When a new article to be conveyed approaches the conveyance means, by releasing the clutch, the conveyance means belonging to the group into which the new article to be conveyed is placed in a free state, so that the conveyance means can be moved by a single motor. Even though each transport means is driven, it can be in a different operating state from the transport means of other groups which are in the fast forward state. [Example] The present invention will be described in detail below based on the illustrated example. A first gauge table 1 disposed after the running cutting machine 3 for cutting the sanderch panel to be manufactured.
and the second gauge table 2 serve as transport devices. Of both the gauge tables 1 and 2 arranged in series, the first gauge table 1 located on the side of the inter-travel cutting machine 3 has a rotary conveyance section 10 such as a roll that conveys the conveyed article by its rotation. are formed by arranging a large number of them along the conveyance direction, and are divided into four groups of 5 to 6 pieces in order of the conveyance direction, and each rotary conveyance section 10 has a clutch 11, respectively. separately connected to motor _M1 via. Similarly, the second gauge table 2 has a plurality of rotary conveyance units 20 divided into three groups along the conveyance direction, and each rotary conveyance unit 2
0 are each individually connected to the motor M ₂ via a clutch 21. Optical sensors PS ₁ to _{PS 8} are disposed at the front stage of each group constituted by the rotary conveyance units 10 and 20 and at the rear stage of the group, respectively, for detecting the transported article. There is. Also,
The two variable speed motors M ₁ and M ₂ are connected to the control circuit C to which these sensors PS ₁ to PS ₈ are connected to motor drive circuits MD ₁ and MD ₂ respectively.
The clutches 11 and 21 are connected to each other via clutch drive circuits CD ₁ to CD ₇ from each group. Therefore, each rotary conveyance section 10, 20 in the first gauge table 1 and the second gauge table 2
When there is no article to be conveyed, all clutches 1
1 and 21 are connected, the line operates at an initial speed Vs that is slower than the line speed Vo. , when the sensor PS ₁ detects an article to be transported, the control circuit C increases the speed of the motor M ₁ to synchronize the rotary transport section 10 with the line speed Vo. Therefore, the article to be transported is transported on the first gauge table 1 at the line speed Vo. However, if the running cutting machine 3 disposed in the previous stage issues a cutting completion signal, or the end of the transported article passes through the installation part of the sensor PS ₁ , the sensor PS ₁ detects the cut of the transported article. When the detection output disappears, the control circuit C further increases the speed of the motor _M1 to move each conveyance section 10 at the rapid feed speed Vh.
Then, once the transported article has passed the sensor PS ₅ , the control circuit C returns the speed of each rotary transport section 10 to the line speed Vo. However, during this fast forwarding and when the transported article is in the
If the sensor PS ₁ detects the next article to be conveyed before it has passed through the gauge table 1, the control circuit C activates the clutch 11 of the rotary conveyor 10 of the group.
is released to be in a free state. And the sensor
If PS ₂ detects an article to be conveyed, it releases the clutch 11 of the rotary conveyance section 10 of the group, and if the sensor PS ₃ detects an article to be conveyed, it releases the clutch 11 of the rotary conveyance section 10 of the group. Although the fast-forwarding state is maintained in this manner, the speed difference between the newly transported article and the rotary transport section is prevented from appearing. When the article to be conveyed that is being rapidly fed passes through to the second gauge table 2 side and a new article to be conveyed has not yet been cut, the full-rotation conveying section 10 is moved at the line speed Vo, and the previous article is moved at line speed Vo. If a cutting completion signal or a passage confirmation signal for the next conveyed article from the sensor PS ₁ is issued before the next conveyed article passes through to the second gauge table 2 side, the full-rotation conveyance unit 10 is moved at the rapid feed speed Vh. FIG. 2 shows a flowchart, and FIG. 4 shows a time chart of operations for each group. Basically, the second gauge table 2 is controlled to have the same speed as the rotary conveyance section 10 of the last group of the first gauge table 1, as shown in the flowchart of FIG. 3a. In other words, when the rotary conveyance section 20 of the second gauge table 2 which is conveying the transported article is moving at the rapid forwarding speed Vh when the group rotary conveying section 10 in the first gauge table 1 is moving at the rapid forwarding speed Vh, the rotary conveying section 20 of the second gauge table 2 which is conveying the transported article is at the rapid forwarding speed Vh, and at the line speed Vo. When in motion, it is moved at line speed Vo. still,
The line speed Vo is reached when the length of the conveyed article is longer than the first gauge table 1 and the sensor PS ₅ detects the conveyed article before the cutting is completed; When the length of the transported article is shorter than the length of the gauge table 1, the line speed of the second gauge table 2 will not reach Vo.
Furthermore, even if the rotary conveyance section 10 of the group of the first gauge table 1 is moving at the line speed Vo, if the sensor PS ₅ located between the first gauge table 1 and the second gauge table 2 is off, that is, ,
When there is no article to be conveyed between both gauge tables 1 and 2 and there is an article to be conveyed on the second gauge table 2, the second gauge table 2 moves at the rapid traverse speed Vh. And when moving at line speed Vo,
When the conveyed article finishes passing through the sensor PS ₅ , the speed is increased to the rapid feed speed Vh. Furthermore, if the sensor PS ₅ detects the conveyed article being moved at the line speed Vo while moving at the rapid feed speed Vh, the control circuit C will act as shown in the flowchart of FIG. 3b. Disengage the clutch 21 of the rotary conveyance section 20 of the group. Similarly, when the sensor PS ₆ and the sensor PS ₇ detect an article to be transported, the clutches 21 of the rotary transport sections 20 of the group are respectively disengaged.
For this reason, the rotary conveyance section 20, which is driven at the rapid feed speed Vh, does not come into contact with the conveyed article, which is moving at the line speed Vo because cutting has not yet been completed. Then, when the disconnection completion signal is received,
Clutch 21 is engaged and the rapid forwarding speed becomes Vh.

【Effect of the invention】

As described above, in the present invention, when the article to be conveyed approaches the conveying means, the line speed is applied, once the article to be conveyed is completely transferred onto the conveying means, the rapid traverse speed is applied, and during the rapid traverse, the next line speed is applied. When the article to be conveyed reaches the conveyance means, the conveyance means belonging to the group into which this new article to be conveyed has entered is set free by releasing the clutch, and each conveyance means is operated by a single motor. Although it is driven, it can be operated in a different operating state from the conveying means of other groups that are in a fast-forwarding state, and for this reason, the next conveyed object is fed at line speed. However, since the conveyed object comes into contact with the conveying means of the group in the free state, it is possible to reduce the risk of the conveyed object being damaged due to a large conveyance difference, and also during fast forwarding. Since there is no need to reduce the entire conveying means to the line speed and priority can be given to the fast-forwarding state, the overall conveying speed can be maintained at a high speed.

[Brief explanation of the drawing]

FIG. 1 is a schematic layout diagram of one embodiment of the present invention, FIGS. 2 and 3 are flowcharts showing the same operation,
Figure 4 is a time chart in which 1 is the first gauge table, 2 is the second gauge table, 10, 2
0 is a rotating conveyance unit, 11 and 21 are clutches, ~
is a group, C is a control circuit, and PS ₁ to PS ₈ are sensors.

Claims (1)

[Claims] 1. A plurality of conveyance means lined up along the conveyance direction are divided into a plurality of groups in the conveyance direction, and each conveyance means of each group is connected to a single motor with variable speed through a clutch to adjust the line speed. Alternatively, any group of conveyance means operating at a rapid traverse speed can be freely set to a free state by releasing the clutch, and the detection means for the conveyed article, the conveyance device at the front stage, and the processing at the front stage are arranged at the front stage of each group. This system is equipped with a control means that sets the operating state of the conveying means to line speed or rapid traverse speed based on signals from the machine, etc., and sets the conveying means of an arbitrary group to a free state by releasing the clutch. The control means causes the conveyed object on the conveying means to be conveyed at a rapid traverse speed, and also sets the conveying means of the group in which the conveyed object moving at the next line speed comes into a free state by releasing the clutch. A conveying device characterized by: