JP2017006457A5 - - Google Patents

Description

As shown in FIG. 2, the two adjustment pulleys 174a and 174b can move independently in the vertical direction. By adjusting the vertical position of the adjustment pulley 174a, the gap Δa between the upper portion of the conveyor belt 171 and the wall portion of the intake chamber 175 can be adjusted. Further, by adjusting the vertical position of the adjustment pulley 174b, the gap Δb between the lower portion of the conveyor belt 171 and the wall portion of the intake chamber 175 can be adjusted. Further, the tension pulley 173 is movable in the horizontal direction. By adjusting the horizontal position of the tension pulley 173, the tension of the conveyor belt 171 can be adjusted. Thus, the gap Δb between the wall portion of the gap .DELTA.a, transportable lower portion of the feed belt 171 and the intake chamber 175 between the upper portion and the wall portion of the intake chamber 175 of the conveyor belt 171 and the conveying belt 171, Each of the tensions can be easily adjusted by adjusting the positions of the adjusting pulleys 174a and 174b and the tension pulley 173.

The protrusion 170 is preferably formed of a material that is more flexible than the material of the conveyor belt 171 (for example, urethane), such as silicon rubber. For example, the material of the conveyance belt 171 is about hardness (rubber hardness, Shore A) Hs90, and the protrusion 170 is made of silicon and the hardness is about Hs50. Various combinations of materials can be applied, but the hardness of the conveyor belt 171 may be selected in the range of Hs 60 to 120, and the protrusion 170 may be selected in the range of Hs 20 to 80. However, the hardness of the protrusion is lower than that of the conveyor belt. Further, when different materials are bonded as described above to form the protrusions, it is possible to select materials having good bonding properties (adhesiveness). The flexibility can be expressed by, for example, an elastic modulus, a deformation rate, and the like. The large flexibility includes a small elastic modulus and a large deformation rate. Moreover, flexibility can also be enlarged by the shape like elongate shape like the hair of a pear, for example.

As shown in FIG. 6, the tablet Tb in contact with the plurality of protrusions 170 swings in a state of being in contact with the plurality of protrusions 170. For this reason, as shown in FIG. 7, especially when the surface of the tablet Tb is a spherical surface, a cylindrical curved surface, or the like, the tablet Tb freely swings on the surface of the transport belt 171 without the protrusions 170, so that the swinging movement is difficult to be suppressed. On the other hand, since the tablets Tb are supported at multiple points by the protrusions 170 that dispersively hit the surface of the tablet Tb, the swaying movement is easily hindered. That is, it becomes support at a plurality of points at a certain interval, and the vibration of the tablet Tb is easily attenuated by restricting the free vibration. Furthermore, each protrusion 170 is formed of a material such as silicon rubber having a higher flexibility than the material of the conveyor belt 171 or is formed in a highly flexible shape, so that it functions as a damper. Thus, the shaking motion can be absorbed more, and coupled with the effect of suppressing the shaking motion by contacting the plurality of protrusions 170, the shaking motion of the tablet Tb can be effectively attenuated and suppressed. It should be noted that vibration when supplied onto the conveyor belt 171 occurs even if the surface of the tablet Tb is not a spherical surface or a cylindrical curved surface. It is clear that the same effect can be obtained even if the tablet surface is flat.

Claims (8)

A transport mechanism having a transport belt for transporting tablets;
A nozzle head having a plurality of nozzles for ejecting ink droplets, the nozzle head being disposed opposite to the transport belt, and ejecting ink from the plurality of nozzles to a tablet transported by the transport belt; An ink jet printing mechanism for performing printing on the tablet,
A tablet printing apparatus in which protrusions are formed at a predetermined density in an area where the tablets of the transport belt can be placed. The conveying belt is provided with a through hole for sucking the tablet, and the protrusion is formed around the through hole,
2. The tablet printing according to claim 1, wherein the transport mechanism sucks the tablet by applying a suction force to a surface on the transport belt side of the tablet in contact with the protrusion through the through hole. apparatus. The projections, at least one tablet printing apparatus according to claim 1 or 2, wherein formed at a density with respect to area of the tablet cover. The tablet printing apparatus according to any one of claims 1 to 3 , wherein a height of the protrusion is in a range of 1/20 or more and 1/5 or less of a thickness of the tablet. The tablet printing apparatus according to any one of claims 1 to 4 , wherein the protrusion is formed of a material that is more flexible than a material of the conveyor belt. The conveyance belt is provided with a groove extending in the conveyance direction of the tablet,
The tablet printing apparatus according to claim 1, wherein the through hole is provided in a bottom surface of the groove. The tablet printing apparatus according to claim 6, wherein a width of the groove is smaller than a diameter of the tablet, and the protrusion is formed on a surface of a conveyance belt rising from the groove. Supplying tablets to the conveyor belt, and transporting the tablets with the conveyor belt;
A step of performing printing on the tablets by ejecting ink from a plurality of nozzles to the tablets conveyed by the conveyance belt;
A tablet printing method comprising: attenuating vibration of the tablet that occurs when the tablet is supplied to the conveyor belt by a protrusion formed on the conveyor belt until printing of the tablet is started.

Images