CN220947252U - Conveying device, liquid ejecting apparatus, and detecting apparatus - Google Patents

Abstract

The present utility model relates to a conveying device, a liquid ejecting apparatus, and a detecting device for detecting a moving amount of a conveying belt with high accuracy. The conveying device (1) is provided with a conveying belt (5) for conveying a medium (M) and a detection device (30), and the detection device (30) is provided with: a contact belt (31) capable of being driven to rotate relative to the conveyor belt (5) by contact with the conveyor belt (5); a first shaft member (32) and a second shaft member (33) around which a contact belt (31) is wound; and a detection unit (34) capable of detecting the amount of movement of the contact belt (31) when the contact belt (31) is rotated by the slave, wherein the first shaft member (32) and the second shaft member (33) are configured not to rotate with the slave rotation of the contact belt (31).

Description

Conveying device, liquid ejecting apparatus, and detecting apparatus

Technical Field

The present utility model relates to a conveying device, a liquid ejecting apparatus, and a detecting apparatus.

Background

Conventionally, various conveying apparatuses for conveying carriers have been used. Among them, there is a conveyor that conveys a carrier using a conveyor belt. For example, patent document 1 discloses an inkjet printing apparatus including a conveyor belt and a measuring roller that rotates in contact with the conveyor belt, wherein a rotation angle of the measuring roller that accompanies movement of the conveyor belt is measured by an encoder, a movement amount of the conveyor belt is determined based on the measurement result, and a fabric feed amount is controlled based on the movement amount.

Patent document 1: japanese patent laid-open No. 07-101121

However, in the inkjet printing apparatus of patent document 1, there is a possibility that the measuring roller is eccentric due to manufacturing tolerances or the like. In the inkjet printing apparatus of patent document 1, when the measuring roller is eccentric, the encoder has low accuracy in measuring the rotation angle of the measuring roller, and the amount of movement of the conveyor belt, that is, the accuracy in measuring the feed amount of the fabric, is low. In this way, in the conventional conveying apparatus that conveys the carrier using the conveyor belt, it is difficult to detect the movement amount of the conveyor belt with high accuracy.

Disclosure of utility model

The present utility model for solving the above problems is a conveyor device including a conveyor belt for conveying a medium and a detection device including: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member around which the contact belt is wound; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave, wherein the first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.

Preferably, the first shaft member has a first outer peripheral surface capable of contacting an inner peripheral surface of the contact belt, the second shaft member has a second outer peripheral surface capable of contacting the inner peripheral surface of the contact belt, and at least one of the first outer peripheral surface and the second outer peripheral surface has a concave portion in which a lubricant is held.

Preferably, the concave portion has a first wall portion and a second wall portion that constitute at least a part of the concave portion and that face each other in an axial direction, which is a direction in which the first shaft member and the second shaft member extend, and the contact strip has a protruding portion that protrudes from an inner peripheral surface of the contact strip toward the concave portion and is capable of abutting at least one of the first wall portion and the second wall portion.

Preferably, the contact belt is disposed inside the conveyor belt.

Preferably, at least one of the first shaft member and the second shaft member is a rotatable shaft rotatably attached to the conveying device in response to the driven rotation of the contact belt, the conveying device includes a motor connected to the rotatable shaft, and a control unit configured to generate a rotational torque so as to prevent the rotatable shaft from rotating relative to the motor in response to the driven rotation of the contact belt, the conveying belt has an adhesive surface capable of adhering the medium, the contact belt is in contact with the adhesive surface, and the control unit is configured to determine a state of the adhesive surface based on a magnitude of the rotational torque.

In order to solve the above problems, a liquid ejecting apparatus according to the present utility model includes a conveyor belt that conveys a medium, an ejecting portion that ejects liquid onto the medium, and a detecting device that includes: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member around which the contact belt is wound; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave, wherein the first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.

In order to solve the above problems, a detection device according to the present utility model is a detection device for detecting a movement amount of a conveyor belt for conveying a medium, the detection device including: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member around which the contact belt is wound; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave, wherein the first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.

Drawings

Fig. 1 is a side view of a liquid ejection device according to embodiment 1 of the present utility model.

Fig. 2 is a side view of the detection device in the liquid ejection device of fig. 1.

Fig. 3 is a side view of a liquid ejection device according to embodiment 2 of the present utility model.

Fig. 4 is a side view of a detection device in a liquid ejection device according to embodiment 3 of the present utility model.

Fig. 5 is a perspective view of a shaft member of a detection device in the liquid discharge device according to embodiment 4 of the present utility model.

Fig. 6 is a perspective view of a shaft member of a detection device in the liquid discharge device according to embodiment 5 of the present utility model.

Fig. 7 is a cross-sectional view of the detection device in the liquid ejection device of fig. 6, and is a diagram showing an enlarged view of a partial area X at the same time.

Fig. 8 is a side view of a detection device in the liquid ejection device according to embodiment 6 of the present utility model.

Fig. 9 is a side view of a detection device in a liquid ejection device according to embodiment 7 of the present utility model.

Fig. 10 is a side view of a detection device in a liquid ejection device according to embodiment 8 of the present utility model.

Fig. 11 is a side view of a detection device in a liquid ejection device according to embodiment 9 of the present utility model.

Description of the reference numerals

1 The liquid ejecting apparatus 1, the discharging section 2, the driven roller 3, the driving roller 4, the conveying belt 5, the bonding surface 5A, the medium attaching section 6, the carriage 7, the head 8 (ejecting section), the cleaning section 9, the cleaning brush 10, the scraping section 11, the photographing section 12, the air blowing section 13, the motor 14, the conveying apparatus 20, the detecting apparatus 30A, the detecting apparatus 30B, the detecting apparatus 30C, the detecting apparatus 30D, the detecting apparatus 30E, the detecting apparatus 30F, the detecting apparatus 30G, the detecting apparatus 30H, the contact belt 31, the inner circumferential surface 31a, the first shaft member 32A, the first shaft member 32B, the first shaft member 32C, the first shaft member 32D, the first shaft member 32E, the first outer circumferential surface 32A, the second shaft member 33B, the second shaft member 33C, the second shaft member 33D, the second shaft member 33E, the second outer circumferential surface 33A, the detecting apparatus 34A detecting portion 34B, the detecting apparatus 35, the recess 35A, the recess 35B, the recess portion 35A, the recess portion 35B, the 36 a, the first wall 37A, the second wall member 37B, the second wall member 39B, the motor 38B, and the medium is provided.

Detailed Description

First, the present utility model will be schematically described.

A first aspect of the present utility model to solve the above-described problems is a conveyor device including a conveyor belt that conveys a medium, and a detection device including: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member around which the contact belt is wound; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave, wherein the first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.

According to this aspect, the detection device includes: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member wound with a contact belt; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by the driven rotation, the first shaft member and the second shaft member not being rotated by the driven rotation of the contact belt. Therefore, even if the first shaft member and the second shaft member are deformed or eccentric due to manufacturing tolerances or the like, the contact belt can be moved relative to the conveyor belt without accompanying errors by sliding relative to the first shaft member and the second shaft member, and even if the first shaft member and the second shaft member are deformed or eccentric due to manufacturing tolerances or the like, the detection unit can detect the movement amount of the contact belt with high accuracy without being affected by the deformation or the eccentricity. Thus, the movement amount of the conveyor belt can be detected with high accuracy.

In the first aspect of the present utility model, the first shaft member has a first outer peripheral surface capable of contacting an inner peripheral surface of the contact belt, the second shaft member has a second outer peripheral surface capable of contacting an inner peripheral surface of the contact belt, and at least one of the first outer peripheral surface and the second outer peripheral surface has a concave portion in which a lubricant is held.

According to this aspect, at least one of the first outer peripheral surface and the second outer peripheral surface has a concave portion in which the lubricant is held. That is, the contact belt is in contact with at least one of the first shaft member and the second shaft member via the outer peripheral surface having the lubricant. Therefore, the sliding load of the contact belt with respect to at least one of the first shaft member and the second shaft member can be reduced, and the detection unit can detect the movement amount of the contact belt with particularly high accuracy by suppressing the sliding failure of the contact belt with respect to the first shaft member and the second shaft member.

In the third aspect of the present utility model, in the second aspect, the concave portion has a first wall portion and a second wall portion, the first wall portion and the second wall portion constitute at least a part of the concave portion and face each other in an axial direction, which is a direction in which the first shaft member and the second shaft member extend, and the contact belt has a protruding portion protruding from an inner peripheral surface of the contact belt toward the concave portion and capable of abutting at least one of the first wall portion and the second wall portion.

According to this aspect, the contact strip has a protruding portion protruding from the inner peripheral surface of the contact strip toward the recess portion, and being capable of abutting at least one of the first wall portion and the second wall portion. In this way, the contact strip can be positioned with respect to at least one of the first shaft member and the second shaft member by fitting the protruding portion and the recessed portion, and misalignment of the contact strip with respect to the first shaft member and the second shaft member can be suppressed. Accordingly, it is possible to suppress a decrease in detection accuracy of the movement amount of the contact belt due to the occurrence of skew of the contact belt with respect to the first shaft member and the second shaft member.

In a fourth aspect of the present utility model, in any one of the first to third aspects, the contact belt is disposed inside the conveyor belt.

According to this aspect, the contact belt is disposed inside the conveyor belt. Therefore, compared with a structure in which the contact belt is disposed outside the conveyor belt, the conveyor apparatus can be miniaturized.

In a fifth aspect of the present utility model, in any one of the first to third aspects, at least one of the first shaft member and the second shaft member is a rotatable shaft rotatably attached to the transport device in response to driven rotation of the contact belt, the transport device includes a motor connected to the rotatable shaft, and a control unit that generates a rotational torque so as to prevent the rotatable shaft from rotating relative to the motor in response to driven rotation of the contact belt, the transport belt has an adhesive surface capable of adhering the medium, the contact belt is in contact with the adhesive surface, and the control unit is capable of determining a state of the adhesive surface based on a magnitude of the rotational torque.

According to this aspect, the conveyor belt has an adhesive surface to which a medium can be adhered. Thus, the medium can be appropriately conveyed. In addition, although the conveyance accuracy of the conveyor belt may be lowered if the state of the adhesive surface is lowered, the control unit may determine the state of the adhesive surface based on the magnitude of the rotational torque generated by the rotation of the rotatable shaft with respect to the motor so that the rotatable shaft does not rotate with the driven rotation of the contact belt. Therefore, the control unit can accurately determine the state of the adhesion surface based on the magnitude of the rotational torque, and can prompt the user to cope with the decrease in the state of the adhesion surface.

A liquid ejecting apparatus according to a sixth aspect of the present utility model is a liquid ejecting apparatus including a conveyor belt that conveys a medium, an ejecting portion that ejects liquid onto the medium, and a detecting device, the detecting device including: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member around which the contact belt is wound; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave, wherein the first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.

According to this aspect, the detection device includes: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member wound with a contact belt; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by the driven rotation, the first shaft member and the second shaft member not being rotated by the driven rotation of the contact belt. Therefore, even if the first shaft member and the second shaft member are deformed or eccentric due to manufacturing tolerances or the like, the contact belt can be moved relative to the conveyor belt without accompanying errors by sliding the first shaft member and the second shaft member relative to the first shaft member, and the detecting unit can detect the movement amount of the contact belt with high accuracy. Thus, the movement amount of the conveyor belt can be detected with high accuracy.

A seventh aspect of the present utility model is a detection device for detecting a movement amount of a conveyor belt that conveys a medium, the detection device including: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member around which the contact belt is wound; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave, wherein the first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.

According to this aspect, the detection device includes: a contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt; a first shaft member and a second shaft member wound with a contact belt; and a detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by the driven rotation, the first shaft member and the second shaft member not being rotated by the driven rotation of the contact belt. Therefore, even if the first shaft member and the second shaft member are deformed or eccentric due to manufacturing tolerances or the like, the contact belt can be moved relative to the conveyor belt without accompanying errors by sliding the first shaft member and the second shaft member relative to the first shaft member, and the detecting unit can detect the movement amount of the contact belt with high accuracy. Thus, the movement amount of the conveyor belt can be detected with high accuracy.

Hereinafter, embodiments according to the present utility model will be described with reference to the drawings.

Example 1

First, an outline of the liquid ejecting apparatus 1 according to embodiment 1 of the present utility model will be described with reference to fig. 1. As shown in fig. 1, the liquid ejecting apparatus 1 of the present embodiment includes a conveying device 20 capable of conveying a medium M in a conveying direction a. Note that, in the liquid ejecting apparatus 1 of the present embodiment, the apparatus from which the carriage 7 described later is removed can be regarded as the conveying apparatus 20, but the entire liquid ejecting apparatus 1 including the carriage 7 may be regarded as the conveying apparatus 20.

The conveying device 20 includes a feeding portion 2, and the feeding portion 2 can feed the medium M by providing the medium M in a roll form and rotating the medium M in the rotation direction C1. The conveying device 20 includes a conveying belt 5, and the conveying belt 5 can convey the medium M fed from the feeding unit 2 in the conveying direction a. The conveying device 20 includes: a driven roller 3 located on the upstream side in the conveying direction a; a driving roller 4 located downstream in the conveying direction a; and a conveyor belt 5, wherein the conveyor belt 5 is an endless belt that is stretched over the driven roller 3 and the driving roller 4.

Here, the conveyor belt 5 is an adhesive belt having an adhesive surface 5a on which an adhesive is applied to a supporting surface of the medium M as an outer surface. As shown in fig. 1, the medium M is supported and conveyed by the conveyor belt 5 in a state where the medium M is stuck on the adhesion surface 5 a. In the liquid ejection device 1 of the present embodiment, the supporting area of the medium M on the conveying belt 5 is an upper area bridged by the driven roller 3 and the driving roller 4. The driving roller 4 is a roller rotated by the driving force of the motor 14, and the driven roller 3 is a roller rotated by the rotation of the conveyor belt 5 accompanied by the rotation of the driving roller 4.

The liquid ejecting apparatus 1 includes a carriage 7 capable of reciprocating in the width direction B of the conveyor 5, and a head 8 attached to the carriage 7. The head 8 functions as a printing section capable of printing an image on the medium M conveyed in the conveying direction a, in other words, as an ejection section for ejecting ink as a liquid onto the medium M. The head 8 is provided at a position facing the supporting area of the medium M on the conveyor belt 5, and can eject ink. In this case, the supporting area of the medium M on the conveyor belt 5 can be said to be an opposing area opposing the head 8. The liquid ejecting apparatus 1 of the present embodiment is capable of ejecting ink from the head 8 to the medium M to be transported while reciprocating the carriage 7 in the width direction B intersecting the transport direction a, thereby forming an image. With the carriage 7 having such a configuration, the liquid ejecting apparatus 1 according to the present embodiment can form a desired image on the medium M by repeatedly conveying the medium M in the conveying direction a by a predetermined conveying amount and ejecting ink while moving the carriage 7 in the width direction B in a state where the medium M is stopped.

The liquid ejecting apparatus 1 of the present embodiment is a so-called serial printer that performs printing by alternately repeating the conveyance of a predetermined amount of the medium M and the reciprocating movement of the carriage 7, but may be a so-called line printer that performs printing continuously while continuously conveying the medium M by using a line head having nozzles formed in a line shape in the width direction B of the medium M. Further, the printing apparatus may be a printing apparatus having a different structure from a so-called inkjet printing apparatus that ejects ink to perform printing.

The liquid ejecting apparatus 1 of the present embodiment is configured such that an image capturing unit 12 is provided in the carriage 7, and an image formed by ejecting ink from the head 8 can be captured by the image capturing unit 12. The data of the image captured by the capturing unit 12 is sent to the control unit 40. The control unit 40 can determine whether or not the predetermined conveyance amount of the conveyance belt 5 is deviated by a predetermined amount and how much the deviation is made when the conveyance amount is deviated, based on the detection result of the detection device 30 and the data, which will be described later. The control unit 40 controls the entire components of the liquid ejecting apparatus 1 according to the present embodiment.

A medium attaching portion 6 is formed at a position facing the conveyor belt 5 on the upstream side of the carriage 7 in the conveying direction a. The medium M is pressed against the conveyor belt 5 in the width direction B by the medium applying portion 6, and is applied to the conveyor belt 5 with the occurrence of wrinkles or the like suppressed.

A detection device 30 described in detail later is provided downstream of the carriage 7 in the conveying direction a. The detection device 30 is a device for detecting the movement amount of the conveyor belt 5.

After the medium M on which an image is formed by ejecting ink from the head 8 is discharged from the liquid ejecting apparatus 1 of the present embodiment, the medium M is transported to a drying apparatus that volatilizes components of the ink ejected onto the medium M provided at a later stage than the liquid ejecting apparatus 1 of the present embodiment, a winding apparatus that winds the medium M on which an image is formed, and the like.

Here, a material to be printed can be preferably used as the medium M. The material to be printed is cloth, clothing, other clothing products, or the like, which are objects to be printed. The cloth includes natural fibers such as cotton, silk and wool, chemical fibers such as nylon, and composite fibers obtained by mixing the natural fibers with the chemical fibers, and fabrics, knits, non-woven fabrics, and the like. In addition, clothing and other clothing products include, in addition to household items such as T-shirts, handkerchiefs, scarves, towels, handbags, cloth bags, curtains, bed sheets, bed covers, and the like, cloth materials before and after cutting, which are members in a state before sewing, and the like.

Further, as the medium M, a special paper for ink-jet printing such as plain paper, high-quality paper, and glossy paper may be used in addition to the material to be printed. As the medium M, for example, a plastic film which is not subjected to surface treatment for ink jet printing, that is, is not formed with an ink absorbing layer, a medium in which plastic is coated on a substrate such as paper, and a medium in which a plastic film is bonded may be used. The plastic is not particularly limited, and examples thereof include polyvinyl chloride, polyethylene terephthalate, polycarbonate, polystyrene, polyurethane, polyethylene and polypropylene.

When a material to be printed is used as the medium M, the material to be printed is likely to cause the phenomenon that the ink discharged onto the medium M permeates to the back surface, that is, the offset of the ink, and therefore the conveyor belt 5 may be stained with the ink. Therefore, the liquid ejecting apparatus 1 of the present embodiment includes a cleaning section 9 for cleaning the ink adhering to the conveyor belt 5 through printing. The cleaning unit 9 of the present embodiment includes: a cleaning brush 10 impregnated with a cleaning liquid and contacting the conveyor belt 5; and a scraper portion 11 for wiping the cleaning liquid adhering to the conveyor belt 5 by bringing the cleaning brush 10 into contact with the conveyor belt 5. Further, the liquid ejecting apparatus 1 of the present embodiment includes the air blowing portion 13, and the air blowing portion 13 can dry the cleaning liquid which is not wiped clean by the blade portion 11.

The liquid ejection device 1 of the present embodiment can convey the medium M in the conveyance direction a by rotating the driving roller 4 in the rotation direction C1. In addition, the liquid ejecting apparatus 1 can also convey the medium M in a direction opposite to the conveying direction a by rotating the driving roller 4 in the rotation direction C2 opposite to the rotation direction C1.

Next, the details of the detection device 30, which is a main part of the liquid ejecting apparatus 1 of the present embodiment, will be described with reference to fig. 2. As shown in fig. 2, the liquid ejecting apparatus 1 of the present embodiment includes a detection device 30A as the detection device 30, and the detection device 30A includes: the contact belt 31 is capable of being driven to rotate relative to the conveyor belt 5 by contact with the conveyor belt 5; the first shaft member 32 and the second shaft member 33 are wound with the contact belt 31; and a detection unit 34 capable of detecting the movement amount of the contact belt 31 when the contact belt 31 rotates by being driven.

The first shaft member 32A of the present embodiment as the first shaft member 32 is a columnar shaft member fixed to a frame, not shown, provided in the liquid discharge device 1. Similarly, the second shaft member 33A of the present embodiment as the second shaft member 33 is a columnar shaft member fixed to the frame. The first shaft member 32A does not have a concave-convex shape on the first outer circumferential surface 32A, which is a circumferential surface, and has a small friction coefficient with respect to the inner circumferential surface 31a of the contact belt 31, so that the contact belt 31 is easily slid. Similarly, the second shaft member 33A is not provided with irregularities on the second outer peripheral surface 33A, which is a peripheral surface, and the friction coefficient with respect to the inner peripheral surface 31a of the contact belt 31 is small, so that the contact belt 31 is easily slid.

In the detection device 30A of the present embodiment, the detection portion 34 is disposed on one side corresponding to the upper side in fig. 2 at a position between the first shaft member 32A and the second shaft member 33A in the direction T in which the tension is applied by the first shaft member 32A and the second shaft member 33A, and the other side corresponding to the lower side in fig. 2 is in contact with the adhesive surface 5a of the conveyor belt 5. That is, the detection device 30A of the present embodiment is configured such that the contact belt 31 moves with the movement of the conveyor belt 5, and at this time, the contact belt 31 slides with respect to the first shaft member 32A and the second shaft member 33A fixed to the frame. The detection unit 34 is configured to be able to detect the movement amount of the contact belt 31.

Note that in the present embodiment, the first shaft member 32A and the second shaft member 33A are both fixed to the frame by screw fixation. However, the structure for sliding the contact belt 31 with respect to the first shaft member 32 and the second shaft member 33 is not particularly limited. For example, the first shaft member 32 and the second shaft member 33 may be fixed to the frame by welding. For example, when the first shaft member 32 and the second shaft member 33 are configured by rotatable shafts such as rotatable rollers and the movement amount of the contact belt 31 is detected by the detection unit 34, a structure may be employed in which the first shaft member 32 and the second shaft member 33 serving as rotatable shafts are not rotated by using a magnetic brake, a motor, or the like.

The detection section 34A of the present embodiment as the detection section 34 is a magnetic sensor. The contact belt 31 is provided with a scale (magnetic scale) that can be read by a detection unit 34A as a magnetic sensor. As the detection unit 34, a detection unit having a structure other than the magnetic sensor such as the detection unit 34A of the present embodiment may be used. However, the magnetic sensor can detect the movement amount of the contact belt 31 with high accuracy even when, for example, dirt such as ink adhesion occurs.

As described above, the detection device 30 of the liquid ejection device 1 of the present embodiment includes: the contact belt 31 is capable of being driven to rotate relative to the conveyor belt 5 by contact with the conveyor belt 5; the first shaft member 32 and the second shaft member 33 are wound with the contact belt 31; and a detection unit 34 capable of detecting the movement amount of the contact belt 31 when the contact belt 31 is rotated by the driven rotation, the first shaft member 32 and the second shaft member 33 being configured not to rotate with the driven rotation of the contact belt 31. Therefore, in the liquid ejecting apparatus 1 of the present embodiment, even if the first shaft member 32 and the second shaft member 33 are deformed or eccentric due to manufacturing tolerances or the like, the scale of the contact belt 31 can be moved without accompanying errors with respect to the conveying belt 5 by sliding with respect to the first shaft member 32 and the second shaft member 33, and the detecting portion 34 can detect the movement amount of the contact belt 31 with high accuracy. Thus, the liquid ejecting apparatus 1 of the present embodiment can detect the movement amount of the conveying belt 5 with high accuracy. In addition, the degree of freedom in arrangement of the detection device 30 with respect to the liquid ejecting apparatus 1 is large, and the scale can be shortened as compared with a structure in which the scale is provided on the conveyor 5, and the like, and the cost can be reduced.

Example 2

The liquid ejecting apparatus 1 of example 2 will be described below with reference to fig. 3. Fig. 3 is a view corresponding to fig. 1 of the liquid ejection device 1 of embodiment 1. Here, the liquid ejecting apparatus 1 of the present embodiment has the same configuration as that of the liquid ejecting apparatus 1 of embodiment 1 except for the arrangement of the detecting device 30, and therefore, description of common parts is omitted. Note that constituent members common to those of embodiment 1 are denoted by the same symbols, and detailed description thereof is omitted.

As shown in fig. 1, the detection device 30 in the liquid ejecting apparatus 1 of example 1 is provided on the upper portion of the conveyor belt 5, that is, on the outer side of the conveyor belt 5. On the other hand, as shown in fig. 3, the detection device 30 in the liquid ejection device 1 of the present embodiment is provided inside the conveyor belt 5. Therefore, the liquid ejecting apparatus 1 of the present embodiment can be miniaturized as compared with the structure of the liquid ejecting apparatus 1 of the embodiment 1 in which the contact belt 31 is disposed outside the conveyor belt 5.

Note that the detection device 30 of the present embodiment adopts the same configuration as the detection device 30 of the liquid ejection device 1 of embodiment 1. That is, the detection device 30 of the present embodiment is the detection device 30A in the same manner as the detection device 30 of the liquid ejection device 1 of embodiment 1. However, in the liquid ejection device 1 of the present embodiment, the detection device 30A is arranged to be opposite to the liquid ejection device 1 of embodiment 1 in the up-down direction.

In detail, as shown in fig. 2, in the liquid ejecting apparatus 1 of the present embodiment, the detection device 30A is disposed in a region facing the carriage 7 in a side view. By adopting such a configuration, the movement amount of the conveyor belt 5 in the image forming area of the liquid ejecting apparatus 1 can be detected particularly accurately.

Example 3

The liquid ejecting apparatus 1 of example 3 will be described below with reference to fig. 4. Fig. 4 is a view corresponding to fig. 2 of the liquid ejection device 1 of embodiment 1. Here, the liquid ejecting apparatus 1 of the present embodiment has the same configuration as that of the liquid ejecting apparatus 1 of embodiment 1 except for the configuration of the detecting apparatus 30, and therefore, description of common portions is omitted. Note that constituent members common to those of the above-described embodiments 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

As described above, the detection device 30A in the liquid ejection device 1 of embodiment 1 includes the detection portion 34A as the magnetic sensor as the detection portion 34. On the other hand, the detection device 30B in the liquid ejection device 1 of the present embodiment includes a camera that is a detection unit 34B capable of capturing images of the contact belt 31 as the detection unit 34. Note that, the detection device 30B in the liquid ejection device 1 according to the present embodiment includes a detection portion 34B instead of the detection portion 34A, and a printed scale readable by the detection portion 34B is provided on the contact belt 31. The detection device 30B in the liquid ejection device 1 of the present embodiment is disposed at the same position as the detection device 30A in the liquid ejection device 1 of embodiment 1, but may be disposed at another position.

Example 4

The liquid ejecting apparatus 1 of example 4 will be described below with reference to fig. 5. Here, the liquid ejecting apparatus 1 of the present embodiment has the same structure as that of the liquid ejecting apparatus 1 of embodiment 1 except for the structure of the detecting device 30, specifically, the first shaft member 32 and the second shaft member 33, and therefore, the description of the common parts is omitted. Note that constituent members common to those of the above-described embodiments 1 to 3 are denoted by the same symbols, and detailed description thereof is omitted.

As described above, in the detection device 30A in the liquid ejection device 1 of embodiment 1, the first shaft member 32A and the second shaft member 33A are each cylindrical shaft members of the same shape fixed to the frame, and no irregularities are provided on the first outer peripheral surface 32A and the second outer peripheral surface 33A, which are peripheral surfaces. On the other hand, in the detection device 30C in the liquid ejection device 1 of the present embodiment, although the first shaft member 32B and the second shaft member 33B are both fixed to the frame and are columnar shaft members having the same shape as each other are common to the first shaft member 32A and the second shaft member 33A, as shown in fig. 5, concave portions 35 are formed in the first outer peripheral surface 32A and the second outer peripheral surface 33A, which are peripheral surfaces. Specifically, two groove-like concave portions 35A extending in the width direction B are formed as the concave portions 35. Further, the lubricant is held in the recess 35A.

In other words, in the liquid ejection device 1 of the present embodiment, the first shaft member 32B has the first outer peripheral surface 32a that can be in contact with the inner peripheral surface 31a of the contact belt 31, the second shaft member 33B has the second outer peripheral surface 33a that can be in contact with the inner peripheral surface 31a of the contact belt 31, and the first outer peripheral surface 32a and the second outer peripheral surface 33a have the concave portion 35A in which the lubricant is held. As shown in the liquid ejecting apparatus 1 of the present embodiment, by providing the concave portion 35 holding the lubricant on at least one of the first outer peripheral surface 32a and the second outer peripheral surface 33a, that is, by the contact belt 31 coming into contact with at least one of the first shaft member 32B and the second shaft member 33B via the outer peripheral surface having the lubricant, the sliding load of the contact belt 31 with respect to at least one of the first shaft member 32B and the second shaft member 33B can be reduced. Further, by suppressing the sliding failure of the contact belt 31 with the first shaft member 32B and the second shaft member 33B, the detection unit 34 can detect the movement amount of the contact belt 31 with particularly high accuracy. The detection device 30C in the liquid ejection device 1 of the present embodiment is disposed at the same position as the detection device 30A in the liquid ejection device 1 of embodiment 1, but may be disposed at another position.

Example 5

The liquid ejecting apparatus 1 of example 5 will be described below with reference to fig. 6 and 7. Here, fig. 6 is a diagram corresponding to fig. 5 of the liquid ejection device 1 of embodiment 4. Since the liquid ejecting apparatus 1 of the present embodiment has the same structure as that of the liquid ejecting apparatus 1 of embodiment 1 except for the structure of the detecting device 30, specifically, the first shaft member 32 and the second shaft member 33, the description of the common parts is omitted. Note that constituent members common to those of the above-described embodiments 1 to 4 are denoted by the same symbols, and detailed description thereof is omitted.

In the detection device 30D of the liquid ejecting apparatus 1 of the present embodiment, the first shaft member 32C and the second shaft member 33C are both fixed to the frame and are columnar shaft members having the same shape as each other, and are common to the first shaft member 32A and the second shaft member 33A, but as shown in fig. 6 and 7, the concave portions 35 are formed in the first outer peripheral surface 32A and the second outer peripheral surface 33A, which are peripheral surfaces, as in the detection device 30C of embodiment 4. However, the recess 35B of the present embodiment as the recess 35 is in the shape of a groove extending in the circumferential direction of the first shaft member 32C and the second shaft member 33C corresponding to the rotation direction C1 and the rotation direction C2. Further, a lubricant is held in the concave portion 35B.

In other words, in the liquid ejection device 1 of the present embodiment, the first shaft member 32C has the first outer peripheral surface 32a that can be in contact with the inner peripheral surface 31a of the contact belt 31, the second shaft member 33C has the second outer peripheral surface 33a that can be in contact with the inner peripheral surface 31a of the contact belt 31, and the first outer peripheral surface 32a and the second outer peripheral surface 33a have the concave portion 35B in which the lubricant is held. As shown in the liquid ejecting apparatus 1 of the present embodiment, by providing the concave portion 35 holding the lubricant on at least one of the first outer peripheral surface 32a and the second outer peripheral surface 33a, that is, by the contact belt 31 coming into contact with at least one of the first shaft member 32C and the second shaft member 33C via the outer peripheral surface having the lubricant, the sliding load of the contact belt 31 with respect to at least one of the first shaft member 32C and the second shaft member 33C can be reduced. Further, by suppressing the sliding failure of the contact belt 31 with the first shaft member 32C and the second shaft member 33C, the detection unit 34 can detect the movement amount of the contact belt 31 with particularly high accuracy.

More specifically, as shown in the enlarged view of the area X in fig. 7, the recess 35B of the detection device 30D of the present embodiment has a first wall 37A and a second wall 37B, and the first wall 37A and the second wall 37B constitute at least a part of the recess 35B, and face each other in the axial direction, which is the direction in which the first shaft member 32C and the second shaft member 33C extend, corresponding to the width direction B. As shown in fig. 7, the contact strip 31 has a protruding portion 36, and the protruding portion 36 protrudes from the inner peripheral surface 31a of the contact strip 31 toward the recess 35B and can abut against the first wall portion 37A and the second wall portion 37B.

As shown in the detection device 30D of the present embodiment, the contact strip 31 preferably has a protruding portion 36 protruding from the inner peripheral surface 31a of the contact strip 31 toward the recess 35B and capable of abutting at least one of the first wall portion 37A and the second wall portion 37B. This is because, by fitting the protruding portion 36 into the recessed portion 35B, the contact strip 31 can be positioned with respect to at least one of the first shaft member 32C and the second shaft member 33C, and misalignment of the contact strip 31 with respect to the first shaft member 32C and the second shaft member 33C can be suppressed. Therefore, by adopting such a configuration, it is possible to suppress a decrease in detection accuracy of the movement amount of the contact belt 31 due to the occurrence of skew of the contact belt 31 with respect to the first shaft member 32C and the second shaft member 33C. The detection device 30D in the liquid ejecting apparatus 1 of the present embodiment is disposed at the same position as the detection device 30A in the liquid ejecting apparatus 1 of embodiment 1, but may be disposed at another position.

Example 6

The liquid ejecting apparatus 1 of example 6 will be described below with reference to fig. 8. Here, fig. 8 is a diagram corresponding to fig. 2 of the liquid ejection device 1 of embodiment 1. The liquid ejecting apparatus 1 of the present embodiment has the same structure as that of the liquid ejecting apparatus 1 of embodiment 1 except that the detecting device 30 has a different structure, and in detail, a tension applying member 38 that applies tension to the contact belt 31 is provided, and therefore, a description of common parts is omitted. Note that constituent members common to those of the above-described embodiments 1 to 5 are denoted by the same symbols, and detailed description thereof is omitted.

As shown in fig. 8, the detection device 30E of the liquid ejecting apparatus 1 of the present embodiment includes, as the tension applying member 38 that applies tension to the contact belt 31, an elastic member 38A that applies force in a direction that moves the first shaft member 32 and the second shaft member 33 away from each other. Although the detection accuracy of the movement amount of the contact belt 31 may be lowered due to the change in the interval of the scale or the like when the contact belt 31 is loosened, the detection device 30E of the liquid ejection device 1 of the present embodiment can suppress such possibility. Note that, the detection device 30E in the liquid ejection device 1 of the present embodiment is disposed at the same position as the detection device 30A in the liquid ejection device 1 of embodiment 1, but may be disposed at another position.

Example 7

The liquid ejecting apparatus 1 of example 7 will be described below with reference to fig. 9. Here, fig. 9 is a diagram corresponding to fig. 2 of the liquid ejection device 1 of embodiment 1. The liquid ejecting apparatus 1 of the present embodiment is different from the structure of the detecting apparatus 30, and in detail, is the same structure as the liquid ejecting apparatus 1 of embodiment 3 except for the tension applying member 38 having a structure different from that of the tension applying member 38 of the liquid ejecting apparatus 1 of embodiment 6, and therefore, description of common parts is omitted. Note that constituent members common to those of the above-described embodiments 1 to 6 are denoted by the same symbols, and detailed description thereof is omitted.

As shown in fig. 9, the detection device 30F of the liquid ejecting apparatus 1 according to the present embodiment includes, as the tension applying member 38 that applies tension to the contact belt 31, a shaft member 38B that is movable in a direction E intersecting a direction in which the first shaft member 32 and the second shaft member 33 are aligned, between the first shaft member 32 and the second shaft member 33. The shaft member 38B is moved upward to apply a strong tension to the contact belt 31, and the shaft member 38B is moved downward to loosen the contact belt 31. Although there is a possibility that the detection accuracy of the movement amount of the contact belt 31 may be lowered due to a change in the interval of the scale or the like when the contact belt 31 is loosened, the detection device 30E of the liquid ejection device 1 of the present embodiment can suppress such a possibility. As shown in the detection device 30E of example 6 and the detection device 30F of the present example, the structure of the tension applying member 38 is not particularly limited. The structure of the contact strip 31 is not particularly limited, and a resin contact strip is preferably used, but a metal contact strip 31 may be used, and if the metal contact strip 31 is used, elongation and the like due to time-dependent changes in the contact strip 31 can be suppressed. Note that, the detection device 30F in the liquid ejection device 1 of the present embodiment is disposed at the same position as the detection device 30A in the liquid ejection device 1 of embodiment 1, but may be disposed at another position.

Example 8

The liquid ejecting apparatus 1 of example 8 will be described below with reference to fig. 10. Here, fig. 10 is a diagram corresponding to fig. 2 of the liquid ejection device 1 of embodiment 1. Since the liquid ejecting apparatus 1 of the present embodiment is the same as the liquid ejecting apparatus 1 of embodiment 3 except for the difference in the structure of the detecting device 30, in detail, the difference in the size of the first shaft member 32 and the second shaft member 33, the description of the common parts is omitted. Note that constituent members common to those of the above-described embodiments 1 to 7 are denoted by the same symbols, and detailed description thereof is omitted.

In the detection device 30 of the liquid ejection device 1 of embodiments 1 to 7, the first shaft member 32 and the second shaft member 33 are the same in size. On the other hand, as shown in fig. 10, in the detection device 30G of the liquid ejection device 1 of the present embodiment, the first shaft member 32D and the second shaft member 33D are different in size. In this way, the sizes of the first shaft member 32 and the second shaft member 33 are not particularly limited. As shown in the detection device 30F of the liquid ejecting apparatus 1 of example 6, a shaft member may be provided in addition to the first shaft member 32 and the second shaft member 33, and the number of the shaft members is not limited, and the shaft members may not also function as the tension applying member 38. The detection device 30G in the liquid ejection device 1 of the present embodiment is disposed at the same position as the detection device 30A in the liquid ejection device 1 of embodiment 1, but may be disposed at another position.

Example 9

The liquid ejecting apparatus 1 of example 9 will be described below with reference to fig. 11. Here, fig. 11 is a diagram corresponding to fig. 2 of the liquid ejection device 1 of embodiment 1. The liquid ejecting apparatus 1 of the present embodiment has the same configuration as that of the liquid ejecting apparatus 1 of embodiment 1 except for the configuration of the detecting apparatus 30, and therefore, description of common portions is omitted. The constituent members common to those of the above-described embodiments 1 to 8 are denoted by the same symbols, and detailed description thereof is omitted.

As described above, in the detection device 30 of the liquid ejection device 1 of embodiments 1 to 8, both the first shaft member 32 and the second shaft member 33 are fixed to the frame and are not rotated at all times with the driven rotation of the contact belt 31. On the other hand, in the detection device 30H of the liquid ejection device 1 of the present embodiment, both the first shaft member 32E and the second shaft member 33E are roller-shaped rotatable shafts rotatably attached to the frame or the like of the liquid ejection device 1 with the driven rotation of the contact belt 31. However, the present invention is not limited to such a configuration, and for example, only one of the first shaft member 32 and the second shaft member 33 may be a rotatable shaft that is rotatably attached to a frame or the like of the liquid discharge device 1 along with the driven rotation of the contact belt 31.

Further, as shown in fig. 11, the liquid ejecting apparatus 1 of the present embodiment includes: a motor 39 connected to the rotatable shaft; and a control unit 40 as shown in fig. 1, which is capable of generating a rotational torque to prevent the rotatable shaft from rotating relative to the motor 39 in accordance with the driven rotation of the contact belt 31. Here, the motor 39 includes a motor 39A and a motor 39B, the motor 39A being connected to the first shaft member 32E, and the motor 39B being connected to the second shaft member 33E. The conveyor belt 5 has a bonding surface 5a to which the medium M can be bonded, and the contact belt 31 is in contact with the bonding surface 5a, so that the control unit 40 can determine the state of the bonding surface 5a based on the magnitude of the rotational torque.

In this way, in the liquid ejecting apparatus 1 of the present embodiment, the conveying belt 5 has the adhesive surface 5a capable of adhering the medium M. Therefore, the medium M can be appropriately conveyed. In the liquid ejecting apparatus 1 of the present embodiment, although the conveyance accuracy of the conveyance belt 5 may be degraded if the state of the adhesive surface 5a is degraded, the control unit 40 can determine the state of the adhesive surface 5a based on the magnitude of the rotational torque generated by the rotation of the rotatable shaft with respect to the motor 39 so that the rotatable shaft does not rotate with the driven rotation of the contact belt 31. Therefore, in the liquid ejecting apparatus 1 of the present embodiment, the control unit 40 can accurately determine the state of the adhesive surface 5a based on the magnitude of the rotational torque, and can urge the user to cope with the state of the adhesive surface 5a being lowered.

Note that when the adhesive face 5a deteriorates, the adhesive force acting on the contact tape 31 decreases. When the adhesive force acting on the contact belt 31 decreases, the force acting on at least one of the first shaft member 32 and the second shaft member 33 at the time of the driven rotation of the contact belt 31 also decreases. The force is converted into a torque that rotates at least one of the first shaft member 32 and the second shaft member 33 in the same direction as the direction in which the contact belt 31 is driven to rotate. Therefore, when the adhesion surface 5a is degraded, the rotational torque for restricting the rotation of at least one of the first shaft member 32 and the second shaft member 33 in the direction in which the contact belt 31 is driven to rotate becomes smaller, and the magnitude of the input to the motor 39 becomes smaller. According to the structure of the present embodiment, by applying this principle, the control section 40 can determine the state of the adhesive surface 5a based on the magnitude of the input. As a result, the mechanism for detecting the movement amount of the conveyor belt 5 can be used as a mechanism for grasping the state of the adhesive force, and the structure of the liquid ejection device 1 can be simplified as compared to a case where the mechanism for grasping the state of the adhesive force and the mechanism for detecting the movement amount of the conveyor belt 5 are separately provided.

In the present embodiment, a rotary encoder or the like is provided to at least one of the first shaft member 32 and the second shaft member 33, and position control is performed so that the rotational positions of the first shaft member 32 and the second shaft member 33 are not moved. As an example of the position control, there are PID and MPC. Note that, for example, in the case where the motor 39 is a stepping motor, the current input to the motor 39 is an exciting current. This is to fix the rotor of the motor 39 by fixing the direction of the magnetic field without switching the phase in which the current flows. It should be noted that the higher the exciting current is, the higher the rotational torque corresponding to the force of the motor 39 to fix the rotatable shaft can be increased. Here, the detection device 30H in the liquid ejection device 1 of the present embodiment is disposed at the same position as the detection device 30A in the liquid ejection device 1 of embodiment 1, but may be disposed at another position.

It should be noted that the present utility model is not limited to the above-described embodiments, and various modifications can be made within the scope of the utility model described in the claims, and these are naturally included in the scope of the utility model.

Claims (7)

1. A conveying device is characterized in that,

The conveying device is provided with a conveying belt for conveying media and a detecting device,

The detection device is provided with:

A contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt;

A first shaft member and a second shaft member around which the contact belt is wound; and

A detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave,

The first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.

2. The delivery device of claim 1, wherein the delivery device comprises a plurality of delivery elements,

The first shaft member has a first outer peripheral surface capable of contacting an inner peripheral surface of the contact belt,

The second shaft member has a second outer peripheral surface capable of contacting the inner peripheral surface of the contact belt,

At least one of the first outer peripheral surface and the second outer peripheral surface has a recess in which a lubricant is held.

3. The delivery device of claim 2, wherein the delivery device comprises a plurality of delivery elements,

The recess has a first wall portion and a second wall portion which constitute at least a part of the recess and are opposed to each other in an axial direction which is a direction in which the first shaft member and the second shaft member extend,

The contact strip has a protruding portion protruding from an inner peripheral surface of the contact strip toward the recessed portion, and being capable of abutting at least one of the first wall portion and the second wall portion.

4. A conveying device according to any one of claims 1 to 3, wherein,

The contact belt is disposed inside the conveyor belt.

5. A conveying device according to any one of claims 1 to 3, wherein,

At least one of the first shaft member and the second shaft member is rotatably attached to the rotatable shaft of the conveying device in accordance with the driven rotation of the contact belt,

The conveying device comprises a motor connected to the rotatable shaft, and a control unit for generating a rotational torque to prevent the rotatable shaft from rotating relative to the motor in response to the driven rotation of the contact belt,

The conveyor belt has an adhesive face capable of adhering the medium,

The contact strip is in contact with the adhesive surface,

The control unit can determine the state of the adhesion surface based on the magnitude of the rotational torque.

6. A liquid ejecting apparatus is characterized in that,

The liquid ejecting apparatus includes a conveyor belt for conveying a medium, an ejecting section for ejecting a liquid onto the medium, and a detecting device,

The detection device is provided with:

A contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt;

A first shaft member and a second shaft member around which the contact belt is wound; and

A detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave,

The first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.

7. A detection device for detecting a movement amount of a conveyor belt that conveys a medium, the detection device comprising:

A contact belt capable of being driven to rotate relative to the conveyor belt by contact with the conveyor belt;

A first shaft member and a second shaft member around which the contact belt is wound; and

A detection unit configured to detect a movement amount of the contact belt when the contact belt is rotated by a slave,

The first shaft member and the second shaft member are configured not to rotate with the driven rotation of the contact belt.