Sistem Conveyor yaitu sistem mekanis yang memilik tujuan untuk  memindahkan antar tempat(dari tempat satu ke tempat yang lain). Conveyor Seringkali Dipakai Untuk Memindahkan Barang Oleh Perusahaan Besar.

Dilihat Dari Beberapa Sudut, Conveyor Memiliki Nilai Ekonois Dalam Memindahkan barang, jika dibandingkan dengan truk. Conveyor dapat menampung barang dengan jumlah besar dan terus berlanjut (continue) dari satu tempat ke tempat lain. Perpindahan tempat tersebut harus mempunyai Tempat yang tetap untuk berhent, agar nilai ekonomis Conveyor Terlihat begitu bermanfaat. Tentu Sistem ini Memiliki Kelemahan Juga. Kelemahan sistem ini adalah tidak empunyai fleksibilitas saat lokasi barang yang dipindahkan tidak tetap dan jumlah barang yang masuk tidak Terus Menerus(continue).

Saat ini Conveyor Berkembang Menjadi eragai Jenis. Jenis-jenis conveyor tersebut antara lain Apron, Flight, Pivot, Overhead, Loadpropelling, Car, Bucket, Screw, Roller, Vibrating, Pneumatic, dan Hydraulic. Disini akan dibahas satu jenis conveyor yaitu Roller Conveyor.

ROLLER CONVEYOR

Roller conveyor adalah sistem conveyor yang penumpu utama barang yang dipindahkan adalah roller. Roller yang terdapat pada sistem ini berbeda dengan roller pada conveyor jenis yang lain. Roller pada sistem ini didesain khusus agar cocok dengan kondisi barang yang dipindahkan, misal roller diberi lapisan karet, lapisan anti karat, dan lain sebagainya. Sedangkan roller pada sistem jenis yang lain didesain cocok untuk sabuk yang ditumpunya.
 

FUNGSI DAN SPESIFIKASI ROLLER CONVEYOR

Roller conveyor hanya bisa memindahkan barang yang berupa unit dan tidak bisa memindahkan barang yang berbentuk bulk atau butiran. Unit yang bisa dipindahkan menggunakan roller conveyor juga harus mempunyai dimensi tertentu dan berat tertentu agar bisa ditransportasikan. Untuk memindahkan barang dalam bentuk bulk, bulk tersebut harus dikemas terlebih dahulu dalam unit agar bisa ditransportasikan menggunakan sistem ini.

Spesifikasi roller conveyor juga harus disesuaikan dengan dimensi dan beban unit yang akan ditransportasikan. Rancangan sistem roller conveyor harus mempu menerima beban maksimum yang mungkin terjadi pada sistem conveyor. Selain itu, desain dimensi sistem juga harus dipertimbangkan agar sesuai dengan dimensi unit yang akan ditransportasikan. Dalam beberapa kasus dimensi unit yang lebih lebar dari dimensi lebar roller masih diperbolehkan.

Jarak antar roller disesuaikan dengan dimensi unit yang akan ditransportasikan. Diusahakan jarak antar roller dibuat sedekat mungkin agar tumpuan beban semakin banyak. Selain itu, dimensi unit yang ditranportasikan minimal harus ditumpu oleh 3 roller. Jika kurang dari 3 roller, maka unit tersebut akan tersendat bahkan bisa jatuh keluar sistem tranportasi roller conveyor.

Kelebihan roller conveyor adalah bisa mentransformasikan pada kemiringan tertentu sehingga conveyor bisa mentranportasikan barang dari satu tingkat ke tingkat yang lain. Selain itu, roller conveyor juga bisa membelokkan jalur unit yang belokkannya sangat tajam. Hal tersebut bermanfaat untuk daerah yang ruanganya terbatas.

Selain itu, roller conveyor memmpunyai kemampuan untuk menggabungkan 2 jalur yang terpisah. Penggabungan 2 jalur tersebut dapat dilakukan dengan berbagai metode seperti Y-Line dan accumulating roller conveyor.

MEKANISME KERJA
Mekanisme kerja roller conveyor secara umum adalah sebagai berikut:
1.Motor penggerak memutar poros pada motor yang telah terpasang sistem transmisi menuju drive roller.
2.Putaran poros pada motor ditransmisikan ke drive roller melalui sistem transmisi yang telah dirancang khusus untuk sistem roller conveyor.
3.Drive roller yang terpasang sistem transmisi tersebut ikut berputar karena daya yang disalurkan oleh sistem transmisi.
4.Drive roller mentransmisikan putaran roller ke roller lain dengan tranmisi rantai.
5.Antar roller diberi jalur transmisi yang sama dengan perbandingan transmisi 1:1 sehingga putaran antar roller mempunyai kecepatan yang sama.
6.Tranmisi antar roller tersebut diteruskan sampai ke roller paling terakhir.

http://rollindodayasakti.com

suryaciptaconveyors.com

BALTIMORE — In the afternoons, the streets of Locust Point are clean and nearly silent. In front of the rowhouses, potted plants rest next to steps of brick or concrete. There is a shopping center nearby with restaurants, and a grocery store filled with fresh foods.

And the National Guard and the police are largely absent. So, too, residents say, are worries about what happened a few miles away on April 27 when, in a space of hours, parts of this city became riot zones.

“They’re not our reality,” Ashley Fowler, 30, said on Monday at the restaurant where she works. “They’re not what we’re living right now. We live in, not to be racist, white America.”

As Baltimore considers its way forward after the violent unrest brought by the death of Freddie Gray, a 25-year-old black man who died of injuries he suffered while in police custody, residents in its predominantly white neighborhoods acknowledge that they are sometimes struggling to understand what beyond Mr. Gray’s death spurred the turmoil here. For many, the poverty and troubled schools of gritty West Baltimore are distant troubles, glimpsed only when they pass through the area on their way somewhere else.

Photo

 

And so neighborhoods of Baltimore are facing altogether different reckonings after Mr. Gray’s death. In mostly black communities like Sandtown-Winchester, where some of the most destructive rioting played out last week, residents are hoping businesses will reopen and that the police will change their strategies. But in mostly white areas like Canton and Locust Point, some residents wonder what role, if any, they should play in reimagining stretches of Baltimore where they do not live.

“Most of the people are kind of at a loss as to what they’re supposed to do,” said Dr. Richard Lamb, a dentist who has practiced in the same Locust Point office for nearly 39 years. “I listen to the news reports. I listen to the clergymen. I listen to the facts of the rampant unemployment and the lack of opportunities in the area. Listen, I pay my taxes. Exactly what can I do?”

And in Canton, where the restaurants have clever names like Nacho Mama’s and Holy Crepe Bakery and Café, Sara Bahr said solutions seemed out of reach for a proudly liberal city.

“I can only imagine how frustrated they must be,” said Ms. Bahr, 36, a nurse who was out with her 3-year-old daughter, Sally. “I just wish I knew how to solve poverty. I don’t know what to do to make it better.”

The day of unrest and the overwhelmingly peaceful demonstrations that followed led to hundreds of arrests, often for violations of the curfew imposed on the city for five consecutive nights while National Guard soldiers patrolled the streets. Although there were isolated instances of trouble in Canton, the neighborhood association said on its website, many parts of southeast Baltimore were physically untouched by the tumult.

Tensions in the city bubbled anew on Monday after reports that the police had wounded a black man in Northwest Baltimore. The authorities denied those reports and sent officers to talk with the crowds that gathered while other officers clutching shields blocked traffic at Pennsylvania and West North Avenues.

Lt. Col. Melvin Russell, a community police officer, said officers had stopped a man suspected of carrying a handgun and that “one of those rounds was spent.”

Colonel Russell said officers had not opened fire, “so we couldn’t have shot him.”

Photo

 

The colonel said the man had not been injured but was taken to a hospital as a precaution. Nearby, many people stood in disbelief, despite the efforts by the authorities to quash reports they described as “unfounded.”

Monday’s episode was a brief moment in a larger drama that has yielded anger and confusion. Although many people said they were familiar with accounts of the police harassing or intimidating residents, many in Canton and Locust Point said they had never experienced it themselves. When they watched the unrest, which many protesters said was fueled by feelings that they lived only on Baltimore’s margins, even those like Ms. Bahr who were pained by what they saw said they could scarcely comprehend the emotions associated with it.

But others, like Lambi Vasilakopoulos, who runs a casual restaurant in Canton, said they were incensed by what unfolded last week.

“What happened wasn’t called for. Protests are one thing; looting is another thing,” he said, adding, “We’re very frustrated because we’re the ones who are going to pay for this.”

There were pockets of optimism, though, that Baltimore would enter a period of reconciliation.

“I’m just hoping for peace,” Natalie Boies, 53, said in front of the Locust Point home where she has lived for 50 years. “Learn to love each other; be patient with each other; find justice; and care.”

A skeptical Mr. Vasilakopoulos predicted tensions would worsen.

“It cannot be fixed,” he said. “It’s going to get worse. Why? Because people don’t obey the laws. They don’t want to obey them.”

But there were few fears that the violence that plagued West Baltimore last week would play out on these relaxed streets. The authorities, Ms. Fowler said, would make sure of that.

“They kept us safe here,” she said. “I didn’t feel uncomfortable when I was in my house three blocks away from here. I knew I was going to be O.K. because I knew they weren’t going to let anyone come and loot our properties or our businesses or burn our cars.”