nginx forward single path to http - ssl

Question

following situation:
I have an play framework server running on localhost:9000. If someone now acces from outside on that server via http, nginx redirect the http request to localhost:9000.
Now i run seperate on that server a rshiny server, that listen on port 9271(https), and has to redirect the traffic to 9270(http).
I tried already some stuff, this one is the last version, that i dont get to work:
server {
listen 9271;
server_name _;
ssl on;
ssl_session_timeout 5m;
ssl_protocols SSLv2 SSLv3 TLSv1;
ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
ssl_prefer_server_ciphers on;
ssl_certificate /etc/nginx/ssl/xxx.pem;
ssl_certificate_key /etc/nginx/ssl/xxx.key;
access_log /var/log/nginx/access.log xxx_host;
error_log /var/log/nginx/error.log;
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://localhost:9270;
proxy_read_timeout 90;
proxy_redirect http://localhost:9270/ $scheme://$host/;
}
}