ler campos da tabela apenas com checkbox selecionados usando javascript

<form role="form" name="dados" id="dados" action="<?php echo base_url('Relatorios/Impressao');  ?>" method="post">
	<input type='hidden' name='qryImpressora' id='qryImpressora' value='<?php echo $impressora; ?>'>
	<input type='hidden' name='pedidos' id='pedidos'>
	<div class="box-body">
		<button type="button" id='btnPost' class="btn btn-success btn-lrg pull-right" onclick="imprimir();">Imprimir    <span class="glyphicon glyphicon-print"></span></button><br><br>
		<div class="col-xs-12 table-responsive">
		  <table id="tabelaPedidos" class="table table-bordered table-condensed table-striped" style="font-size: 12px; width:2000px;">
			<thead>
			<tr>
				<th><input type='checkbox' name='todosCheck' onclick='verificaStatusCheck(this)' /> TODOS</th>
				<th>CLIENTE</th>
				<th>CNPJ</th>
				<th>DATA API</th>
				<th>PEDIDO</th>
			</tr>
			</thead>
			<tbody>
				<?php
					$contakey  = 0;
					$selecao = array();
				   if (!empty($logInt)) {
					 foreach($logInt as $log){
				?>
			  <tr>
				  <td><center><input type='checkbox' id='selecionado' name='<?php echo "selecionado[$contakey]"; ?>' value='<?php echo $log->PEDIDO; ?>' /></center></td>
				<?php 
					echo "<input type='hidden' id='qtPrint' name='qtPrint[$contakey]' value='".$log->DANFE_IMPRESSO."' disabled/>";
					echo "<input type='hidden' id='apikeyCli' name='apikeyCli[$contakey]' value='".$log->CLIENTE_PIER."' />";
				?>
				<td><?php echo $log->WS_APELIDO; ?></td>
				<td><?php echo $log->WS_CNPJCLIENTE; ?></td>
				<td><?php echo formatdatetime($log->DATAREQUISICAO); ?></td>
				<td><center><?php echo $log->PEDIDO; ?></center></td>
			  </tr>
			<?php
					$contakey++;
				 }
			   }
			?>
			</tbody>
		  </table>
		</div>
	</div>
</form>

    function imprimir(){
        var text = '{"pedidosSelecionados":[';
        var json        = '';
        var gravou = false;
        var linha = 0;
        formulario = document.getElementById('dados');	
        var txtChk = document.getElementsByTagName("INPUT");
        //-- monta o json para gravar os pedidos
        for (i = 0; i < txtChk.length; i++){
            var item = txtChk[i];
            if (item.type == "checkbox" && item.checked) {
               if(item.id == 'selecionado'){
                   if(linha == 0){
                        text += '"'+item.value+'"';
                        linha++;
                    } else {
                        text += ',"'+item.value+'"';
                        linha++;
                    }
                } 
            } 
        }
        text +=']}';
        json =      text;
        formulario.pedidos.value = '';
        formulario.pedidos.value = json;
        //-- submete o formulario
        formulario.submit();
       return true;
    }