Inkjet recording apparatus

Abstract

The liquid ejection apparatus with a liquid jetting head and support members is described. A first support member and a second support member support a guide and feeding roller in a scanning direction and are attached to a housing of the liquid ejection apparatus. The housing at the location to which the first support member is attached is easier to deform in the scanning direction than housing at the location to which the second support member is attached. Further, the housing at the first location may include a projection. The first support member may be attached to the projection.

What is claimed is: 
     
       1. A liquid ejection apparatus comprising:
 a liquid jetting head; 
 a carriage configured to move in a scanning direction and configured to support the liquid jetting head; 
 a guide extending in the scanning direction, the guide being configured to support the carriage through the carriage's movement in the scanning direction, the guide being formed of a first material; 
 a feeding roller extending in the scanning direction and configured to feed a medium in a feeding direction, the feeding direction being is perpendicular to the scanning direction, the feeding roller having a first side and a second side spaced from each other in the scanning direction; 
 a first support member supporting the feeding roller at the first side of the feeding roller and supporting the guide, the first support member including an attachment portion; 
 a second support member supporting the feeding roller at the second side of the feeding roller and supporting the guide, the second support member including an attachment portion; and 
 a housing being formed of a second material, the housing including a first location fixture portion to which the attachment portion of the first support member is fixed and including a second location fixture portion to which the attachment portion of the second support member is fixed, the first fixture portion being located at a first location and the, the second fixture portion being located at a second location being spaced from each other the first location in the scanning direction, 
 wherein the housing at the first location is easier to deform in the scanning direction than the housing at the second locationwherein the housing includes a first surface that surrounds the first fixture portion and is lower than the first fixture portion in a direction perpendicular to both the scanning direction and the feeding direction, the first surface being further away than the first support member in the scanning direction from the second support member, 
 wherein the housing includes a second surface to which the second support member is attached, 
 wherein the first surface is lower than the second surface, 
 wherein the guide comprises a first guide member and a second guide member, which are arranged in the feeding direction, the first support member and the second support member extends in the feeding direction across the first guide member and the second guide member and being fixed by the first guide member and the second guide member, and 
 wherein the first fixture portion is more difficult to deform in the feeding direction than in the scanning direction. 
 
     
     
       2. The liquid ejection apparatus according to  claim 1 ,
 wherein the second material of the housing has higher coefficient of linear expansion than the first material of the guide. 
 
     
     
       3. The liquid ejection apparatus according to  claim 1 ,
 wherein the attachment portion of the first support member is fixed to the housing at the first location in a direction perpendicular to both the scanning direction and the feeding direction, the portion of the housing at the first location being a first fixture portion, and   wherein the attachment portion of the second support member is fixed to the housing at the second location in the direction perpendicular to both the scanning direction and the feeding direction, the portion of the housing at the second location being a second fixture portion.   
     
     
       4. The liquid ejection apparatus according to  claim 3 ,
 wherein the first fixture portion protrudes from a part of the housing surrounding the first fixture portion toward the first support member in the first direction.   
     
     
       5. The liquid ejection apparatus according to  claim 3 ,
 wherein the guide comprises a first guide member and a second guide member, which are arranged in the feeding direction, the first support member and the second support member extends in the feeding direction across the first guide member and the second guide member and being fixed by the first guide member and the second guide member, and   wherein the first fixture portion is more difficult to deform in the feeding direction than in the scanning direction.   
     
     
       6. The liquid ejection apparatus according to claim  5  1,
 wherein the first fixture portion protrudes from a part of the housing surrounding the first fixture portion toward a side of the first support member in the first direction, and 
 wherein a length of the first fixture portion in the feeding direction is longer than in the scanning direction so that the deformation of the first fixture portion in the feeding direction is easier than in the scanning direction. 
 
     
     
       7. The liquid ejection apparatus according to claim  3  1, further comprising:
 a motor connected to the feeding roller, 
 a driven portion configured to be driven by the motor, and 
 a gear mechanism configured to transmit a rotatory power to the driven portion, 
 wherein the driven portion and the gear mechanism is disposed on an opposite side of the second fixture portion with respect to the first fixture portion. 
 
     
     
       8. The liquid ejection apparatus according to  claim 7 , wherein the feeding roller comprises:
 a first feeding roller connected to the motor, 
 a second feeding roller which is away from the first feeding roller in the feeding direction, and 
 a belt configured to transmit a rotatory power of the first feeding roller to the second feeding roller, 
 wherein the belt is disposed on an opposite side of the second fixture portion with respect to the first fixture portion. 
 
     
     
       9. The liquid ejection apparatus according to claim  3  1,
 wherein the second support member is fixed with a particular part of the housing, and  
 wherein the particular part is further away from the attachment portion of the second support member toward an opposite side of the second support member in the perpendicular direction perpendicular to both the scanning direction and the feeding direction. 
 
     
     
       10. The liquid ejection apparatus according to claim  3  1,
 wherein the first support member is fixed with the first fixture portion by a bolt extending a particular in the direction perpendicular to both the scanning direction and the feeding direction. 
 
     
     
       11. The liquid ejection apparatus according to  claim 10 , A liquid ejection apparatus comprising:
 a liquid jetting head; 
 a carriage configured to move in a scanning direction and configured to support the liquid jetting head; 
 a guide extending in the scanning direction, the guide being configured to support the carriage through the carriage's movement in the scanning direction, the guide being formed of a first material; 
 a feeding roller extending in the scanning direction and configured to feed a medium in a feeding direction, the feeding direction being perpendicular to the scanning direction, the feeding roller having a first side and a second side spaced from each other in the scanning direction; 
 a first support member supporting the feeding roller at the first side of the feeding roller and supporting the guide, the first support member including an attachment portion; 
 a second support member supporting the feeding roller at the second side of the feeding roller and supporting the guide, the second support member including an attachment portion; and 
 a housing being formed of a second material, the housing including a first fixture portion to which the attachment portion of the first support member is fixed and including a second fixture portion to which the attachment portion of the second support member is fixed, the first fixture portion being located at a first location, the second fixture portion being located at a second location being spaced from the first location in the scanning direction, 
 wherein the first support member is fixed with the first fixture portion by a bolt extending in the direction perpendicular to both the scanning direction and the feeding direction, 
 wherein each of the first support member and the second support member extends in the perpendicular direction perpendicular to both the scanning direction and the feeding direction, and each of the first support member and the second support member has an L-shape with each's attachment portion extending into an inner side of the housing in the scanning direction, 
 wherein the attachment portion of the first support member is fixed with the first fixture portion by the bolt, and 
 wherein the attachment portion of the second support member is fixed with the second fixture portion by the bolt. 
 
     
     
       12. The liquid ejection apparatus according to  claim 1 , further comprising:
 a medium support member configured to support the medium fed by the feeding roller, the medium support member fixed on the first support member and the second support member. 
 
     
     
       13. The liquid ejection apparatus according to  claim 1 ,
 wherein the first support member and the second support member are non-integral with each other. 
 
     
     
       14. A liquid ejection apparatus comprising:
 a liquid jetting head;   a carriage configured to move in a scanning direction and configured to support the liquid jetting head;   a guide extending in the scanning direction, the guide being configured to support the carriage through the carriage's movement in the scanning direction, the guide being formed of a first material;   a feeding roller extending in the scanning direction and configured to feed a medium in a feeding direction, the feeding direction being is perpendicular to the scanning direction, the feeding roller having a first side and a second side spaced from each other in the scanning direction;   a first support member supporting the feeding roller at the first side of the feeding roller and supporting the guide, the first support member including an attachment portion;   a second support member supporting the feeding roller at the second side of the feeding roller and supporting the guide, the second support member including an attachment portion; and   a housing being formed of a second material, the housing including a first fixture portion to which the attachment portion of the first support member is fixed and including a second fixture portion to which the attachment portion of the second support member is fixed, the first fixture portion being located at a first location, the second fixture portion being located at a second location being spaced from the first location in the scanning direction,   wherein the housing includes a first horizontal surface that surrounds the first fixture portion and is lower than the first fixture portion in a direction perpendicular to both the scanning direction and the feeding direction, the first horizontal surface being further away than the first support member in the scanning direction from the second support member,   wherein the housing includes a second horizontal surface to which the second support member is attached,   wherein the first horizontal surface is lower than the second horizontal surface,   wherein the guide comprises a first guide member and a second guide member, which are arranged in the feeding direction, the first support member and the second support member extends in the feeding direction across the first guide member and the second guide member and being fixed by the first guide member and the second guide member, and   wherein the first fixture portion is more difficult to deform in the feeding direction than in the scanning direction   wherein the guide comprises a first guide member and a second guide member, which are arranged in the feeding direction, the first support member and the second support member extends in the feeding direction across the first guide member and the second guide member and being fixed by the first guide member and the second guide member, and   wherein the first fixture portion is more difficult to deform in the feeding direction than in the scanning direction.   
     
     
       15. The liquid ejection apparatus according to claim 1,
 wherein expansion and contraction of the housing relative to the guide due to heat occurs at the first support member.   
     
     
       16. The liquid ejection apparatus according to claim 1,
 wherein the first surface is a first horizontal surface, and   wherein the second surface is a second horizontal surface.