Pretreatment apparatus

1. A pretreatment apparatus comprising:

a platen;

a pretreatment portion configured to pretreat a medium to be printed set on the platen; and

a belt configured to convey the platen from a set position to the set position via the pretreatment portion, the set position being a position at which the medium is placed on the platen.

2. The pretreatment apparatus according to claim 1 , wherein

the belt includes a staying area where the platen that has finished processing in the pretreatment portion is caused to stay, and

the belt conveys the platen in the staying area to the set position, after the platen on which the medium is placed at the set position is conveyed toward the pretreatment portion.

3. The pretreatment apparatus according to claim 2 , further comprising:

a stopper configured to restrict the platen in the staying area from being conveyed toward the set position, and

the stopper configured to protrude upward from the belt between the set position and the staying area,

wherein

the belt is configured to convey the platen toward the pretreatment portion, and

the stopper releases restriction of the platen in the staying area after the platen in the set position is conveyed toward the pretreatment portion.

4. The pretreatment apparatus according to claim 3 , wherein

the stopper includes a first stopper and a second stopper,

the first stopper and the second stopper are arranged with an interval therebetween longer than a length of the platen in a conveying direction of the platen,

the second stopper configured to restrict the platen in the staying area from being conveyed toward the set position, and

the first stopper configured to restrict the conveying of the platen in the staying area.

5. The pretreatment apparatus according to claim 4 , further comprising:

a processor; and

a memory storing computer-readable instructions that, when executed by the processor, cause the processor to perform processes including:

raising the first stopper, when the belt conveys the platen after raising the second stopper.

6. The pretreatment apparatus according to claim 2 , wherein

the staying area includes a first staying area and a second staying area,

the second staying area is adjacent to the first staying area and receives the platen from a previous process, and

the pretreatment apparatus further comprises:

a processor; and

a memory storing computer-readable instructions that, when executed by the processor, cause the processor to perform processes including:

determining whether there is an empty space for the platen to stay in the first staying area; and

conveying the platen from the second staying area to the first staying area when it is determined that there is the empty space in the first staying area.

7. The pretreatment apparatus according to claim 6 , wherein

the pretreatment portion includes a heat processing portion, and

the memory further stores computer-readable instructions that, when executed by the processor, cause the processor to perform processes including:

determining whether the platen is to be caused to stay in the second staying area; and

causing the platen to stay in the second staying area for a certain period of time so as to cool the platen, when it is determined that the platen is to be caused to stay in the second staying area.

8. The pretreatment apparatus according to claim 2 , further comprising:

a set position sensor configured to detect the platen at the set position; and

a staying area sensor configured to detect the platen in the staying area,

wherein

the belt conveys the platen from the staying area to the set position when a state changes from a state of detecting the platen by the set position sensor to a state of not detecting the platen by the set position sensor.

9. The pretreatment apparatus according to the claim 1 , wherein

the belt includes a set position belt and a staying area belt, and

the staying area belt conveys the platen toward the set position after the set position belt conveys the platen.

10. The pretreatment apparatus according to claim 1 , further comprising:

a receiver configured to receive an instruction to start conveying the platen at the set position toward the pretreatment portion,

wherein

the belt conveys the platen at the set position when the receiver receives the instruction.

11. The pretreatment apparatus according to claim 1 , further comprises:

a processor; and

a memory storing computer-readable instructions that, when executed by the processor, cause the processor to perform processes including:

determining whether an error command has been received; and

executing error processing when it is determined that the error command has been received.

12. The pretreatment apparatus according to claim 1 , further comprising:

a platen fixing portion configured to fix the platen at the set position.

13. The pretreatment apparatus according to claim 1 , wherein

the pretreatment portion includes an application portion and a heat processing portion,

the application portion is configured to apply a pretreatment agent to a fabric set on the platen, and

the heat processing portion is configured to perform heat processing on the fabric set on the platen.

14. The pretreatment apparatus according to claim 1 , wherein

the pretreatment portion includes a heat press portion comprising:

an air passage member defining a passage for air;

an air supply source connected to the air passage member;

a first valve connected downstream of the air supply source via the air passage member, the first valve being configured to be switchable between an open state and a closed state;

a second valve connected downstream of the first valve via the air passage member, the second valve being configured to be switchable between the open state and the closed state;

an air cylinder connected downstream of the second valve via the air passage member; and

a third valve connected downstream of the air cylinder via the air passage member, the third valve being configured to be switchable between the open state and the closed state.

15. The pretreatment apparatus according to claim 14 ,

wherein the heat press portion further comprises a pressure transducer connected to the air passage member between the first valve and the second valve, the pressure transducer being configured to output a pressure signal corresponding to air pressure in the air passage member between the first valve and the second valve,

wherein the pretreatment apparatus according further comprises:

a processor; and

a memory storing computer-readable instructions that, when executed by the processor, cause the processor to perform processes including:

controlling, when the first valve, the second valve, and the third valve are in the closed state, the first valve to be in the open state;

monitoring the pressure signal from the pressure transducer; and

controlling, in response to receiving the pressure signal indicating a predetermined pressure, the first valve to be in the closed state.

16. The pretreatment apparatus according to claim 15 ,

wherein the heat press portion further comprises a downstream sensor located downstream of the air cylinder in a conveying path of the platen, the downstream sensor being configured to detect the platen,

wherein the memory further stores computer-readable instructions that, when executed by the processor, cause the processor to perform processes including:

controlling, in response to receiving a detection signal from the downstream sensor, the second valve to be in the open state.

17. The pretreatment apparatus according to claim 16 , wherein the memory further stores computer-readable instructions that, when executed by the processor, cause the processor to perform processes including:

controlling, after controlling the second valve to be in the open state, the second valve to be in the closed state; and

controlling the first valve to be in the open state after controlling the second valve to be in the closed state.