Block grid cells in extjs?

I have a grid on extjs 6, which has a work schedule.

If I place a textfield for 22 hours, I should leave it enabled for editing on the grid only in the morning, but if I leave 44, all day.

The grid contains 5 column: Day :, (Tomorrow) Entry, Exit, (Afternoon) Entry, Exit.

Each column has cells that are like combobox with a minimum and maximum value, the idea is to leave empty those in the afternoon when you activate 22 hours and q can not be edited.

How do you block a cell, or a column of cells in extjs?

This is the design of a column (Jornada Mañana):

 xtype: 'gridcolumn',
                        menuDisabled: true,
                        text: 'Jornada Mañana',
                        columns: [
                            {
                                xtype: 'gridcolumn',
                                renderer: 'renderHora1',
                                itemId: 'mycolumn17',
                                resizable: false,
                                dataIndex: 'entrada_manana',
                                menuDisabled: true,
                                text: 'Entrada',
                                editor: {
                                    xtype: 'timefield',
                                    itemId: 'mytimefield',
                                    hideLabel: true,
                                    format: 'H:i',
                                    maxValue: '10:00',
                                    minValue: '6:00',
                                    submitFormat: 'H:i',
                                    listeners: {
                                        select: 'onTimefieldSelect'
                                    }

For example, I know that if I remove the column editor: it could no longer be edited, but I do not know how to do it optimally.

Any ideas on how I could block some cells in particular?

Thank you very much !!!