CN202106677U - Liquid jetting device - Google Patents

Abstract

The utility model provides a liquid injection device. The object of the present invention is to solve the problem that the quality of an image formed by ejecting ink from a liquid ejection head deteriorates because vibrations are generated accompanying changes in the curved shape of the liquid supply tube and affect the movement control of the carriage. The liquid ejecting device includes: a pipe guide body (111) that guides the nozzle side pipe (52b) and has a threaded hole (1111) formed at one end in the width direction; The bending deformation of the side pipe is restricted, and a restricting member (118) is formed with a first through hole (1181) corresponding to the threaded hole at one end in the width direction; and the restricting member is fixed on the first through hole and the threaded hole The screw (119) of the pipe guide has a hook (1112) formed at the end of the pipe guide, and an engaging portion (1189) for engaging the hook is formed at the end of the restricting member.

Description

liquid injection device

technical field

The utility model relates to a liquid injection device.

Background technique

In a liquid ejecting device that ejects ink onto a recording medium such as paper to form an image while reciprocating a carriage on which a liquid ejecting head is mounted, there is a liquid ejecting device in which an ink tank is arranged outside the carriage and equipped with a A liquid supply tube that supplies ink from the ink tank to the liquid ejection head.

In such a liquid ejecting device, a liquid supply pipe is provided so that the liquid supply pipe bends and deforms as the carriage reciprocates.

For example, Patent Document 1 discloses an inkjet recording device that includes a holding member for holding a plurality of liquid supply tubes to prevent loosening of the liquid supply tubes caused by the movement of the carriage, And it will not affect the movement of the carriage.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2007-144905

However, in the method of Patent Document 1, in the range of the liquid supply pipes from the position held by the holding member to the position fixed to the carriage, the respective liquid supply pipes are dispersedly apart as the carriage moves. The lower bend shape changes. As a result, vibrations are generated accompanying changes in the curved shapes of the respective liquid supply tubes, which affect the movement control of the carriage, and therefore, there is a problem that the quality of an image formed by ejecting ink from the liquid ejection head is degraded.

Utility model content

The present invention was made to solve at least a part of the above-mentioned problems, and the invention can be realized as the following embodiments or application examples.

[Application example 1] A liquid ejection device is provided, wherein the liquid ejection device includes: a liquid tank; a liquid ejection head that ejects liquid; a flexible liquid supply tube that is connected to the liquid The tank is connected to the above-mentioned liquid ejection head, and the liquid in the above-mentioned liquid tank is supplied to the above-mentioned liquid ejection head; The pipe guide extends along the extending direction of the above-mentioned liquid supply pipe, guides the above-mentioned liquid supply pipe, and is formed with a threaded hole at one end in the width direction; the restricting member extends along the width direction of the above-mentioned pipe guide, restricts The bending deformation of the above-mentioned liquid supply pipe that is bent and deformed with the reciprocation of the above-mentioned carriage, and a first through-hole corresponding to the above-mentioned threaded hole is formed at one end portion in the width direction; and a screw that utilizes the above-mentioned first The above-mentioned restricting member is fixed to the above-mentioned pipe guide through the hole and the above-mentioned threaded hole, a hook is formed on the other end of one of the above-mentioned pipe guide and the above-mentioned restricting member, and the above-mentioned pipe guide and the above-mentioned restricting member The other end part is formed with an engaging part into which the above-mentioned hook is engaged.

According to this configuration, the liquid ejecting apparatus includes: a restricting member extending in the width direction of the tube guide body, restricting the bending deformation of the liquid supply tube that is bent and deformed by the reciprocating movement of the carriage, and having a A first through hole corresponding to the threaded hole is formed; and a screw for fixing the restricting member to the pipe guide by using the first through hole and the threaded hole is formed at the other end of one of the pipe guide and the restricting member. There is a hook, and an engaging portion for engaging the hook is formed at the other end portion of the other of the pipe guide and the restricting member. Thereby, the liquid supply tube can be fixed to the tube guide body, and the vibration accompanying the change of the curved shape of the liquid supply tube can be suppressed. Therefore, without affecting the movement control of the carriage, it is possible to suppress deterioration in the quality of an image formed by ejecting ink from the liquid ejection head.

[Application example 2] In the liquid ejecting device as described above, an extension portion extending vertically downward is formed at the other end portion of the restriction member, and the hook is formed at an end portion of the extension portion, The engaging portion is formed by a corner of the other end of the pipe guide, and the hook engages with the corner of the pipe guide.

According to this configuration, it is possible to suppress an increase in the manufacturing cost of the tube guide body.

[Application example 3] The above-mentioned liquid ejecting device is characterized in that a side wall is formed on the other end portion of the tube guide, and a pair of protrusions are formed on the side wall to sandwich the extended portion of the restriction member. .

According to this configuration, it is possible to suppress movement of the restriction member in the direction in which the tube guide extends.

[Application example 4] The above-mentioned liquid ejecting device is characterized in that a side wall is formed at the other end portion of the tube guide, and the side wall is formed so that a The notch, the extension part of the above-mentioned restricting component is located in the notch.

According to this configuration, it is possible to suppress movement of the restriction member in the direction in which the tube guide extends.

[Application Example 5] The liquid ejecting device as described above is characterized in that the hook is formed at the other end of the tube guide, and a second through hole is formed at the other end of the restricting member, and the hook extends from the second The through hole protrudes and engages with the engaging portion.

According to this configuration, it is possible to suppress movement of the restriction member in the direction in which the tube guide extends.

[Application Example 6] In the liquid ejecting device as described above, a side wall is formed on the other end portion of the tube guide, and the hook is located inside the side wall.

According to this configuration, it is possible to suppress enlargement of the tube guide body.

[Application example 7] In the liquid ejecting device as described above, an extension portion extending vertically downward is formed at the other end portion of the restriction member, and the hook is formed at an end portion of the extension portion, A through-hole through which the hook penetrates is formed in the tube guide, and the hook protrudes from the through-hole of the tube guide and engages with the engaging portion.

According to this configuration, it is possible to suppress movement of the restriction member in the direction in which the tube guide extends.

[Application Example 8] In the liquid ejecting device as described above, the restricting member includes a protrusion-shaped pressing portion on a surface on the side of the liquid supply tube, and the pressing portion presses the liquid supply tube.

According to this configuration, the liquid supply tube can be fixed to the tube guide body.

As described above, the liquid ejecting device is characterized in that the liquid tank is arranged outside the housing, and the housing accommodates the carriage and the tube guide.

According to this configuration, the liquid supply tube can be fixed to the tube guide body, and vibrations accompanying changes in the curved shape of the liquid supply tube can be suppressed. Therefore, without affecting the movement control of the carriage, it is possible to suppress deterioration in the quality of an image formed by ejecting ink from the liquid ejection head.

Description of drawings

FIG. 1 is a perspective view showing an inkjet recording device.

2 is a perspective view showing an opening for a tube of an inkjet recording device.

FIG. 3 is a perspective view showing the internal structure of the inkjet recording device.

FIG. 4 is a cross-sectional view showing an inkjet recording device.

Fig. 5 is a perspective view showing the periphery of an ink supply unit.

Fig. 6 is a sectional view showing a tank unit.

Fig. 7 is a bottom view showing the box unit.

Fig. 8 is an exploded perspective view showing the periphery of the valve unit.

FIG. 9 is an explanatory view showing the action when the ink tube in contact with the frictional contact surface generates a traction force.

Fig. 10 is a perspective view showing an intermediate joint.

Fig. 11 is a perspective view showing the periphery of the guide unit.

Fig. 12(a) is a perspective view showing a tube holding member, and (b) and (c) are cross-sectional views showing the tube holding member.

FIG. 13 is an explanatory view showing an assembly operation of the ink tube to the tube holding member.

Fig. 14 is a partial perspective view of a plate fixed to a pipe guide.

Fig. 15(a) is a perspective view showing a binding member included in a pipe bending portion, and (b) is a perspective view showing a binding member included in a plate.

Fig. 16(a) is a perspective view showing the periphery of the guide unit, and (b) is a partially enlarged view of the guide body.

Fig. 17(a) is a perspective view of a restricting member, and (b) is a partial perspective view of a fixed position in a tube guide.

Fig. 18 is a cross-sectional view showing a state in which the head-side tube is fixed to the tube guide by a restricting member.

Fig. 19(a) is a perspective view of a restriction member provided with a hook as an engaging portion, and Fig. 19(b) is a partial perspective view of a fixing position fixed by the restriction member in the pipe guide.

20( a ) is a cross-sectional view showing the state before the head-side tube is held between the restricting member and the pipe guide, and (b) is a cross-sectional view showing the state after the head-side pipe is held between the restricting member and the pipe guide.

21( a ) is a cross-sectional view showing a state in which the hook provided on the restricting member is engaged with the corner of the pipe guide, and (b) is a view showing the hook provided on the restricting member engaged with the corner of the pipe guide. Partial perspective view of .

Fig. 22 is a perspective view showing a case where notches are provided in the tube guide body.

Fig. 23 is a partial perspective view showing a case where two tube fixing portions are provided on the tube guide body.

Label description

1...Inkjet recording device; 3...Box unit; 15...External cover; 41...Sliding frame; 43...Inkjet head; 51...Ink tank; 52... Ink tube; 52b... nozzle side pipe; 111, 111a, 111b1, 111b2, 111c... tube guide body; 117... side wall; 118, 118a, 118b... limiting part; 119... screw ; 150...protruding part; 1111...threaded hole; 1113...through hole; 1114...protruding part; 1115...notch; 1116...engaging part; 1181...first through hole; 1182...pressing part; 1183...second through hole; 1184, 1185...hook; 1187, 1188...extending part; 1189...engaging part .

Detailed ways

Hereinafter, an ink jet recording device according to an embodiment of the present invention will be described with reference to the drawings. This inkjet recording device is an inkjet printer using a box unit provided separately from the main body of the recording device. The inkjet head mounted on the carriage performs main scanning in the left-right direction, and the printing paper is scanned in the left-right direction. Sub-scanning is performed in the crossing front-rear direction, and image data is printed on printing paper.

(first embodiment)

FIG. 1 is a perspective view showing an ink jet recording device 1 as a liquid ejecting device. FIG. 1 shows an inkjet recording apparatus 1 in a state where a tank unit 3 serving as a liquid tank is assembled to a recording apparatus main body 2 . 2 is a perspective view showing a tube opening 15 a for introducing an ink tube 52 as a liquid supply tube from the tank unit 3 into the recording device main body 2 in the inkjet recording device 1 .

FIG. 2 shows the inkjet recording device 1 in a state where the tank unit 3 is separated from the recording device main body 2 . FIG. 3 is a perspective view showing the internal structure of the inkjet recording device 1 . Here, the X-axis direction will be the depth/near direction in FIGS. 1 to 3 , and the Y-axis direction will be the left-right direction in FIGS. 1 to 3 , which is perpendicular to the X-axis direction.

As shown in FIGS. 1 to 3 , an inkjet recording device 1 is composed of a recording device main body 2 and a box unit 3. The box unit 3 is connected to the recording device main body 2 in a detachable manner. Each component of the inkjet recording device 1 is mounted. Specifically, the main body 2 of the recording device includes: a conveyance unit 11 for conveying printing paper (single-sheet paper) in the X-axis direction (transportation direction); The upper side of the printing paper, and includes an inkjet head 43 (refer to FIG. 4 ) as a liquid ejection head for printing on the printing paper; The printing unit 12 supplies inks that are liquids of yellow, magenta, cyan, and black.

On the other hand, the tank unit 3 has a tank-side ink supply unit 13b having ink tanks 51 of yellow, magenta, cyan, and black colors, and is connected to the main body-side ink supply unit 13a. The ink supply unit 13 of the inkjet recording device 1 is constituted by the main body side ink supply unit 13 a of the recording device main body 2 and the tank side ink supply unit 13 b of the tank unit 3 .

The inks of yellow, magenta, cyan, and black stored in the tank unit 3 are sent to the inkjet head 43 of the printing part 12 through the ink tube 52 described later with a natural water level difference, and are accompanied by the inkjet head 43. The main scanning of the ink discharge job and the sub-scanning (intermittent feeding) of the printing paper form a printing image on the printing paper.

The outer contour of the recording device main body 2 is formed by a box-shaped exterior cover 15 , and a pair of front and rear engaged portions 15 b for assembling the box unit 3 are formed on the left side wall of the recording device main body 2 . On the other hand, the outer contour of the box unit 3 is formed by a box-shaped unit case 17, and a pair of front and rear engaging portions 17a that engage with the engaged portion 15b are formed on the right side wall of the box unit 3. . That is, the box unit 3 is detachably attached to the recording device main body 2 by engaging the engaging portion 17 a with the engaged portion 15 b from above.

Thereby, the tank unit 3 can be detachably connected to the recording apparatus main body 2 with the ink tube 52 connected. Further, a tube opening 15 a for introducing the ink tube 52 from the tank unit 3 into the exterior cover 15 is formed on the left side wall of the exterior cover 15 . In addition, the tank unit 3 is attached to the recording device main body 2 in a vertical orientation when supplying ink (see FIG. 1 ), and is detached from the recording device main body 2 when replenishing ink to the ink tank 51. And it is formed into a horizontal placement posture (refer to FIG. 2).

FIG. 4 is a cross-sectional view showing the inkjet recording device 1 . As shown in FIGS. 3 and 4 , the conveying unit 11 is provided with: a paper tray 21 on which the printing paper is placed on the paper tray 21 in a right-aligned manner; a separating roller 22 shown in FIG. Separated and sent out one by one from the paper tray 21; the paper feed roller 23a and the paper feed driven roller 23b, which are located on the downstream side of the separation roller 22, along the transport path R The printing paper is fed into the printing section 12; the platen 24 is located on the downstream side of the paper feed roller 23a and the paper feed driven roller 23b, and is opposed to the inkjet head 43; the guide roller 25 is located on the The downstream side of the platen 24 guides the printing paper from above; the paper discharge roller 26a and the paper discharge driven roller 26b, which are located on the downstream side of the guide roller 25, guide the printing paper Paper is discharged from a paper discharge port 15c (see FIGS. 1 and 2 ); and a paper discharge frame 27 for supporting the guide roller 25 and the paper discharge driven roller 26b.

In this case, the paper feed roller 23a and the paper feed driven roller 23b function as main rollers that control the conveyance of printing paper, and the paper discharge roller 26a and the paper discharge driven roller 26b function as a pair of rollers that are conveyed to the platen 24. The tension roller that applies tension to the printing paper on the upper side functions. In addition, the guide roller 25 presses the front end of the conveyed printing paper to prevent paper jams. The printing paper introduced from the paper tray 21 by the separation roller 22 is moved along the conveyance path R along the X axis by the paper feed roller 23a and the paper feed follower roller 23b, the guide roller 25, and the paper discharge roller 26a and the paper discharge follower roller 26b. direction, and is discharged from the paper discharge port 15c after being printed.

The printing part 12 of FIG. freely reciprocating; and a carriage moving mechanism (not shown) for reciprocating the carriage unit 32 along the guide frame 31 . Furthermore, the inkjet head 43 shown in FIG. 4 is mounted on the carriage unit 32 .

The guide frame 31 in FIG. 3 is formed in a "C"-shaped cross section, and the engagement sliding portion 41a is hooked on the guide frame 31 to be supported by one side support, and is supported to reciprocate in the extending direction (Y-axis direction). Move freely, that is, slide freely.

The carriage moving mechanism includes (both are omitted from the illustration): a timing belt extending along the guide frame 31; a driving pulley and a driven pulley over which the timing belt spans; a connecting and fixing part , the connection fixing part is used to connect the timing belt and the carriage unit 32 (sledge 41); and the carriage motor is used to drive the driving pulley. When the carriage motor rotates forward and backward, the carriage unit 32 reciprocates in the Y-axis direction via the timing belt. Accompanying this reciprocating movement, the inkjet head 43 of the carriage unit 32 performs discharge drive, that is, performs main scanning.

The carriage unit 32 includes a box-shaped carriage 41 reciprocally supported by the guide frame 31 via an engaging slide portion 41 a , and a head unit 42 assembled to the carriage 41 . The head unit 42 has: an inkjet head 43 having four rows of nozzles for discharging ink droplets of yellow, magenta, cyan, and black; The color connection adapter 44 is directly connected to the inkjet head 43 from the upper side and connected to the downstream end of the ink tube 52 .

The inkjet head 43 in FIG. 4 has four nozzle rows (not shown) of yellow, magenta, cyan, and black extending parallel to each other in the X-axis direction, and are separated by a predetermined distance from the printing paper that is conveyed. The paper gap (paper gap) is arranged to face downward. Each connection adapter 44 includes an ink buffer, an ink filter, and the like, and has an inflow joint 44 a connected to an ink tube 52 at its upper portion.

In the printing process, the printing paper is conveyed by the transport unit 11 to the lower side of the inkjet head 43, and the carriage unit 32 is reciprocated by the carriage moving mechanism while driving the inkjet head 43, The image data is thereby printed on the printing paper.

FIG. 5 is a perspective view showing the periphery of the ink supply unit 13 . As shown in Figure 3 and Figure 5, the ink supply part 13 is provided with: the ink tank 51 of each color of yellow, magenta, cyan, black; Four ink tubes 52 of each ink tank 51 and head unit 42 (inflow joint 44 a of each connection adapter 44 ); and a guide mechanism 53 for guiding the paths of the four ink tubes 52 .

FIG. 6 is a sectional view showing the tank unit 3 . The ink supply unit 13 is provided with: a manual valve unit 54 built in the lower part of the tank unit 3 for opening and closing the flow paths at the upstream ends of the four ink tubes 52; The box side anti-off part 55 is attached to the bottom of the box unit 3, and is used to prevent the outflow joint 51b on the ink tank 51 side of Fig. 6 from coming off; the main body side anti-off part 56, the main body side anti-off part 56 is built in The lower part in the main body 2 of the recording device is used to prevent the intermediate joint 57 on the side of the main body 2 of the recording device; and the intermediate joint 57 is arranged in the main body 2 of the recording device and serves as the The connecting joints are clamped on the 4 ink tubes.

FIG. 7 is a bottom view showing the box unit 3 . As shown in FIGS. 6 and 7 , each ink tank 51 stores ink of a corresponding color and is arranged side by side in the X-axis direction. Each ink tank 51 has a tank main body 51 a and an outflow joint 51 b formed at a lower portion of the tank main body 51 a and protruding in the Y-axis direction. Furthermore, the upstream ends of the respective ink tubes 52 are inserted and joined to the respective outflow joints 51b.

As shown in FIG. 3 and FIG. 5 , the four ink tubes 52 are made of silicone rubber, and the tubes are arranged in parallel in the horizontal direction. In addition, the four ink tubes 52 are guided by the guide mechanism 53 and pulled back from the respective ink tanks 51 to the head unit 42 . Furthermore, the four ink tubes 52 are provided with connecting bodies 60 for connecting the four ink tubes 52 in parallel at a plurality of locations in the extending direction (Y-axis direction), so that the tubes are arranged in parallel.

Each ink tube 52 is flexible and includes a tank-side tube 52a and a head-side tube 52b. The tank-side tube 51a belongs to the tank-side ink supply part 13b and is located on the side of the ink tank 51. The head-side tube 52b belongs to the main body side. The ink supply unit 13a is located on the side of the inkjet head 43 . The two proximal ends of the tank-side pipe 52a are respectively supported by the above-mentioned tank-side detachment member 55 and the main body-side detachment-prevention member 56, and the upstream end is connected to each ink tank 51 via the outflow joint 51b, and is connected to the ink tank 51 from the tank unit 3. It bends sharply upward and transitions to the main body 2 of the recording device.

The head-side pipe 52b is routed from the intermediate joint 57 to cross the inside of the recording device main body 2, bends upward at the right part inside the recording device main body 2, extends further, bends back further, and its downstream end passes through The inflow joint 44 a of FIG. 3 is connected to each connection adapter 44 . The tank-side pipe 52 a has, as a part, a bridging pipe portion 61 spanning from the tank unit 3 to the recording device main body 2 . In addition, the nozzle side pipe 52b has a pipe bending portion 62 and a pipe return bending portion 63. The pipe bending portion 62 traverses the inside of the recording device main body 2 and is bent so as to be turned back upward at the right portion inside the recording device main body 2. The return bend portion 63 is bent back deeply on the upstream side of the pipe bend portion 62 .

The upstream side of the bridging pipe 61 is supported by the box-side drop-off preventing member 55 , and the downstream side is supported by the main body-side drop-off preventing member 56 . The valve unit 54 shown in FIG. 4 is disposed on the upstream side of the bridging pipe portion 61 of the tank-side pipe 52 a. Furthermore, the tank-side pipe 52 a is connected to the intermediate joint 57 on the downstream side of the body-side detachment preventing member 56 at a position on the downstream side of the bridging pipe portion 61 .

The tube bending portion 62 is routed in a transverse U-bend shape in the area in front of the reciprocating movement area of the carriage unit 32 , that is, in the area directly above the sheet discharge frame 27 in FIG. 3 . In this case, the pipe bending portion 62 is bent and pulled back from the bottom to the top with the intermediate joint 57 side as the fixed side and the carriage 41 side as the movable side, and is pulled back as the carriage 41 reciprocates. Follow the deformation. That is, the pipe bending portion 62 is arranged so as to be parallel to the reciprocating movement track of the carriage unit 32 , and operates in a U-bent shape following the reciprocating movement of the carriage unit 32 .

The pipe return 63 extends from the pipe bend 62 , is bent vertically in the horizontal plane to be drawn back, and then the downstream end is connected to each connection adapter 44 via the inflow joint 44 a. Furthermore, a tube holding member 122 (details will be described later) of FIG. Rack 41.

In addition, a linear mark (not shown) continuous in the extending direction is provided on the peripheral surface of the ink tube 52 (the tank-side tube 52 a and the head-side tube 52 b ). This mark is when assembling each pipe portion 61, 62, 63, by visually confirming whether the ink tube 52 is twisted or not. Route the pipe so that the marks are on the inside of the bend. Thereby, the ink tube 52 can be extended without being twisted, and instability when the ink tube 52 is pulled back can be suppressed.

FIG. 8 is an exploded perspective view showing the periphery of the valve unit 54 . As shown in FIGS. 6 to 8 , the valve unit 54 is built in the bottom of the tank unit 3 and arranged at the upstream end of the four ink tubes 52 (tank-side tubes 52 a ). The valve unit 54 is provided with: a position restricting part 66 which restricts the position of the four ink tubes 52 so that they are arranged laterally; a valve main body 67 (refer to FIG. Ink tube 52, these four ink tubes 52 are crushed (clamped) at the same time so as to block all the flow paths; Operating lever 68, which has a function for opening and closing the flow path based on the valve body 67 (valve body 67 advance and retreat) the cam that operates; and the substantially square valve frame (valve frame) 69, this valve frame 69 is used to support above-mentioned parts. The valve unit 54 is a member that forcibly closes the flow path by a user's operation when there is a possibility of trouble such as liquid leakage in the ink supply unit 13 , for example, during ink replenishment.

The tank-side anti-loosening part 55 is attached to the side wall of the valve frame 69, and the base of the tank unit 3 side where the tube portion 61 is erected so that the four ink tubes 52 are pulled back upward along the side wall of the valve frame 69 and bent into an S shape. The state of the shape supports four ink tubes 52 .

Specifically, the box-side detachment preventing member 55 has: a lower tube support body 71 that supports the S-shaped upstream side curved portion 61a of each ink tube 52 in a curved state; an upper tube support body 72 The upper tube support body 72 supports the S-shaped downstream side curved portion 61b of the ink tube 52 in a curved state from the opposite side of the lower tube support body 71 so as to cover the four ink tubes 52; and the receiving member 73, which The receiving member 73 is integrally formed with the upper pipe support 72 and faces the lower pipe support 71 . That is, the support position of the lower tube support body 71 (contact position with the ink tube 52 ) and the support position of the upper tube support body 72 (contact position with the ink tube 52 ) are aligned in the extending direction of the ink tube 52 (vertical direction). Arranged for location offset. In addition, the socket facing the upper pipe support body 72 also serves as a part of the above-mentioned unit case 71 .

The lower tube support 71 guides upward the path of the ink tube 52 protruding horizontally from the valve unit 54 , and supports the ink tube 52 when a pulling force acts in the extending direction of the ink tube 52 . This is to prevent the ink tube 52 from moving in the extending direction. Specifically, the lower tube support body 71 is integrally formed by a frictional contact portion 81 having a frictional contact surface 81a, a plurality of spacer plate portions 82, and a fixing portion 83, and the four ink tubes 52 are bent. contact with the frictional contact surface 81a, so that a frictional force against the traction force is generated between the frictional contact surface 81a and the four ink tubes. spacer between them, and is used to arrange the four ink tubes 52 in order, and the above-mentioned fixing part is used to fix the frictional contact part 81 to the side wall of the valve frame 69 .

On the other hand, the receiving member 73 has a position restricting plate portion 84 and a pair of front and rear engagement portions 85. The position restricting plate portion 84 is opposed to the lower tube support body 71, and the four ink tubes are aligned between the lower tube support body 71 and the lower tube support body 71. 52 , the front and rear pair of engaging portions 85 engage with the engaged portion 69 a formed on the side wall of the valve frame 69 . Moreover, the partition board part 82 of the down tube support body 71 restricts the width of the four ink tubes 52, and is a contact part with respect to a receiving member. Therefore, the four ink tubes 52 are prevented from being crushed by the receiving member 73 in the mounted state.

Like the lower tube support 71 , the upper tube support 72 supports the ink tube 52 so as to prevent the ink tube 52 from moving in the extending direction when a pulling force acts in the extending direction of the ink tube 52 . Specifically, the upper tube support body 72 has: a frictional contact portion 91 having a frictional contact surface 91a, and the four ink tubes 52 are in contact with the frictional contact surface 91a in a bent state so that 91a and the 4 ink tubes generate friction against the traction force; a pair of front and rear abutment pins (not shown), the front and rear pair of abutment pins protrude from the friction contact surface 91a, and avoid the ink tube 52 from abutting on the The side wall of the unit case 17 ; and a pair of front and rear support body fixing screws 93 , 93 for fixing the frictional contact portion 91 to the unit case 17 . That is, the position of the four ink tubes 52 is restricted between the side wall of the unit case 17 and the upper tube support body 72 . Furthermore, the four ink tubes 52 are prevented from being crushed by the pair of abutting pins of the upper tube support body 72 .

For the lower pipe support body 71 and the upper pipe support body 72 (and the receiving member 73) constituted in the above manner, the lower pipe support body 71 is positioned by a plurality of protrusions protruding from the side wall of the valve frame 69 for positioning. The pipe support body 72, the engaging portion 85 of the upper pipe support body 72 is engaged with the engaged portion of the valve frame 69, and further, the upper part is screwed to the unit case 17 by the support body fixing screw 93, thereby, The lower tube support 71 and the upper tube support 72 are fixed to the tank unit 3 together with the ink tubes 52 .

The frictional contact surface 81 a of the lower tube support 71 and the frictional contact surface 91 a of the upper tube support 72 extend in the direction in which the four ink tubes 52 are arranged, and are in contact with the four ink tubes 52 at the same time. Furthermore, the frictional contact surfaces 81a, 91a are formed in a curved shape that generates a frictional force when a traction force acts from the extending direction of the ink tube 52 . For example, as shown in FIG. 9( a), when the ink tube 52 is in contact with the frictional contact surfaces 81a, 91a in a bent state, if a traction force is generated from the downstream side, the traction force is generated on the frictional contact surface 81a side as a contact force. of force. This contact force creates a firm frictional force, forming a firm positional constraint with respect to the direction of extension. Since the ink tube 52 is limited within a predetermined angular range A on the upstream side and downstream side of each supporting position, the frictional contact surfaces 81a, 91a are formed so as to generate the above-mentioned frictional force with respect to any traction force from this angular range A. The curved shape (see Figure 9(b) and (c)).

Specifically, the position of the ink tube 52 on the upstream side of the support position of the lower tube support body 71 is regulated by the position regulating portion 66 of the valve unit 54 , and is further downstream than the support position of the lower tube support body 71 . The position of the part is restricted by the upper pipe support body 72 and the unit case 17 . The part on the upstream side of the support position of the upper tube support body 72 is restricted by the lower tube support body 71 and the receiving member 73, and the part on the downstream side of the support position of the upper tube support body 72 faces the recording device main body 2 side. Since it is pulled back in an inverted U-shape, this part is positionally restricted from the upper side of the main body of the recording device. Each of the frictional contact surfaces 81a, 91a is formed corresponding to the angular range A of the extending direction based on the above-mentioned position restriction.

In this way, the lower tube support body 71 and the receiving member 73, and the upper tube support body 72 and the side wall of the unit case 17 are double-linked to prevent movement (position restriction) in the extending direction. As a result, the outflow of the tank side tube 52a The detachment prevention part of the joint 51b functions.

As shown in FIGS. 3 and 5 , the main body side detachment preventing member 56 has a pipe support body 106 shown in FIG. Between 111. The tube support body 106 supports the recording device main body 2 side base of the bridging tube portion 61 in a state of being prevented from moving when a traction force is applied from the extending direction. Specifically, the tube support body 106 includes a plate-like frictional contact portion 107 having a frictional contact surface 107a on which the four ink tubes 52 bend, and a pair of plate-shaped left and right width limiting plate portions 108, 108. In this state, the frictional contact surface 107a is contacted from the lower side, so that a frictional force against the traction force is generated between the frictional contact surface 107a and the four ink tubes 52. For the four ink tubes 52 , the width of the four ink tubes 52 is restricted, and also serves as a side plate of the frictional contact portion 107 . The frictional contact portion 107 is integrally formed with a pair of width regulating plate portions 108 , 108 .

The friction contact surface 107 a of the tube support 106 extends in the direction in which the four ink tubes 52 are arranged, and contacts the four ink tubes 52 at the same time. In addition, the friction contact surface 107a is formed in a curved shape that generates a component force as a contact force with respect to an arbitrary traction force from a predetermined angle range A in the extending direction of the ink tube 52, similarly to the lower tube support body 71 and the upper tube support body 72. Specifically, since the part of the ink tube 52 on the upstream side of the support position of the tube support body 106 is pulled back toward the tank unit 3 side in an inverted U-shape, the position of this part is restricted from above the tank unit 3 side, The position on the downstream side of the support position of the pipe support body 106 is restricted by the intermediate joint 57 (each inflow-side port 101 ). The contact friction surface 107a is formed to correspond to the angular range A of the extending direction based on the above-mentioned position restriction.

FIG. 10 is a perspective view showing the intermediate joint 57 . As shown in FIG. 10 , the intermediate joint 57 is interposed between the tank-side pipe 52 a and the nozzle-side pipe 52 b on the fixed side of the pipe bending portion 62 . The intermediate joint 57 has: four inflow side ports 101 corresponding to the four ink tubes; four outflow side ports 102 corresponding to the four inflow side ports 101; used to connect the four inflow side ports 101 and the four outflow side ports 102 of the plate-shaped connecting portion 103; engaging groove 104, the engaging groove 104 is formed in the connecting portion 103, and engages with the protrusion of the pipe guide 111 described later; Set protrusion 105 .

The intermediate joint 57 is locked to the tube guide body 111 by snapping (snap in) at the part of the locking protrusion 105 so as not to fall off from the tube guide body 111 . In addition, the engaging groove 104 prevents the vertical direction from being mistakenly attached to the pipe guide body 111 . Furthermore, the downstream end of each tank-side pipe 52 a is inserted and joined to each inflow-side pipe 101 , and the upstream end of each head-side pipe 52 b (pipe bending portion 62 ) is inserted and joined to each outflow-side port 102 . With the intermediate joint 57 configured in this way, the tank-side pipe 52a and the head-side pipe 52b can be replaced individually.

As shown in FIGS. 3 and 5 , the guide mechanism 53 includes a tube guide body 111 extending parallel to the reciprocating trajectory of the carriage 41 (in the Y-axis direction) and receiving the tube bending portion 62 from the lower side. the tube fixing part 112, which fixes the tube bending part 62 to the tube guide body 111 on the fixed side; the flexible plate 113 attached to the tube bending part 62; and the guide unit 114, which guides the tube The movable end of the bending portion 62 is held on the carriage unit 32 and guides the bending shape of the tube return bending portion 63 .

The tube guide 111 is formed of, for example, an integral thin metal plate, and extends in the Y-axis direction (the reciprocating direction of the carriage unit 32 ). That is, the tube guide 111 is formed to extend in the Y-axis direction, which is the direction in which the ink tubes 52 extend, and to receive the four ink tubes 52 from below. Specifically, the tube guide body 111 has a bottom plate portion 116 extending in the Y-axis direction and receiving the four ink tubes 52 , and a pair of left and right side walls 117 extending from the bottom plate portion 116 . The ends on both sides stand up. Furthermore, as shown in FIG. 4 , the bottom plate portion 116 is disposed above the paper discharge frame 27 with a predetermined gap therebetween.

Furthermore, an intermediate joint 57 is attached to the pipe guide body 111 at its end on the tank unit 3 side. Therefore, a pair of U-shaped guide bodies 120 are attached to this portion (side wall 117 ) of the pipe guide body 111 for fitting the intermediate joint 57 from above. Furthermore, a protrusion that engages with the engaging groove 104 of the intermediate joint 57 in FIG. 10 is provided on the bottom plate portion 116 of the pipe guide body 111 .

The tube fixing part 112 in FIG. 5 is provided with a restricting member 118 and a screw 119. The restricting member 118 uses the tube guide body 111 as a receiving part to press and fix the four nozzle side tubes 52b. The screw 119 is used to screw the restricting member 118. on the tube guide body 111. The tube fixing part 112 fixes the four head-side tubes 52 b to the tube guide body 111 on the fixing side of the tube bending part 62 . Specifically, four head-side tubes 52 b are fixed to the upstream end of the non-movable region of the tube bending portion 62 . Thereby, the deformation of the head-side tube 52b can be stabilized, and the tube bending portion 62 at the intermediate joint 57 can be prevented from falling out.

FIG. 17( a ) is a perspective view of the restricting member 118 . A first through-hole 1181 is provided at one end in the longitudinal direction (X-axis direction) of the restricting member 118 , and a second through-hole 1183 is provided at the other end. In this embodiment, the first through hole 1181 has a circular shape, and the second through hole 1183 has a rectangular shape.

Further, a pair of pressing portions 1182 are formed on the restricting member 118 , and the pair of pressing portions 1182 protrude toward the lower side in the forward direction (Z-axis direction) of the restricting member 118 and extend in the longitudinal direction.

FIG. 17( b ) is a partial perspective view of the fixed position in the tube guide body 111 . A threaded hole 1111 is provided at one end in the width direction (X-axis direction) of the pipe guide 111 , and a hook 1112 as an engaging portion is provided at the other end.

The hook 112 a is provided so as to be located on the inside of the side wall 117 . Accordingly, it is possible to suppress increase in size of the tube guide body 111 .

FIG. 18 is a cross-sectional view showing a state in which the head-side tube 52 b is fixed to the tube guide body 111 by the restricting member 118 . As shown in FIG. 18 , one end in the width direction of the pipe guide 111 is fixed by a screw 119 passing through the first through hole 1181 and a threaded hole 1111 , and the other end passes through the second through hole 1183 with a hook 1112 and engages with the restricting member. 118 , that is, the engaging portion 1189 is fixed.

The head-side pipe 52 b is fixed so as to be sandwiched between the bottom plate portion 116 and the pressing portion 1182 .

One end of the plate 113 in FIG. 3 is fixed to the tube guide body 111 , and the other end is held by the carriage 41 . The plate 113 has flexibility, and bends and deforms integrally following the four head-side pipes 52 b (head bending portions 62 ) as the carriage unit 32 reciprocates. Therefore, it is possible to suppress the vibration caused by the four head-side pipes 52b being dispersedly bent and deformed.

In addition, the plate 113 extends from the outside along the R portion of the pipe bending portion 62 to prevent the pipe bending portion 62 from contacting other structural components on the right side or upper side of FIG. . That is, the plate 113 has the function of a tube carrier.

FIG. 14 is a partial perspective view of the plate 113 fixed to the tube guide body 111 . In the tube guide 111 , a pair of protrusions 150 serving as fixing portions are formed on the tank unit 3 side from the end portion 1186 of the restricting member 118 on the inkjet head 43 side. The pair of protrusions 150 are respectively inserted into a pair of through holes 151 provided in the plate 113, whereby the plate 113 is fixed.

Thereby, since the position of the plate 113 on the side of the tube holding member 122 can be easily set with respect to the head-side tube 52b, the workability when installing the plate 113 along the head-side tube 52b is improved. In addition, by forming the pair of protrusions 150 on the side of the tank unit 3 from the end 1186 of the restricting member 118, the influence of the bending deformation of the nozzle-side pipe 52b can be reduced. The reciprocating movement of the frame 41 can also prevent the through hole 151 from slipping out of the protrusion 150 by being deformed following the reciprocating movement.

FIG. 15( a ) is a perspective view showing the binding member 160 included in the tube bending portion 62 . The binding member 160 is used to bind the four head-side pipes 52 b and the plate 113 .

FIG. 15( b ) is a perspective view showing the binding member 160 included in the plate 113 . A protruding engaging portion 164 is formed on an extension portion of the first surface 161 of the binding member 160 , and the engaging portion 164 engages with the opening 163 provided on the second surface 162 .

As shown in FIG. 15( b ), the binding member 160 is fixed to the plate 113 by passing the third surface 165 of the binding member 160 through the through-hole 166 provided in the plate 113 . Alternatively, the binding member 160 may be fixed to the plate 113 with an adhesive. Alternatively, the binding member 160 and the plate 113 may be integrally formed.

FIG. 11 is a perspective view showing the periphery of the guide unit 114 . As shown in FIG. 11 , the guide unit 114 includes: a guide member 121 that bends the tube return portion 63 at right angles in the same plane and guides it to the head unit 42; and a tube holding member (tube holding body). 122, the pipe holder 122 is provided near the upstream side of the guide member 121, and holds the movable end of the pipe bending portion 62 in the above-mentioned same plane. The guide member 121 and the tube holding member 122 are fixed to the carriage 41 .

The guide member 121 is a lead-out portion for leading the head-side pipe 52 b out of the carriage 41 . The guide member 121 includes: a guide body 128 having a guide groove 127 composed of two individual guide grooves 126, each of which guides two nozzle side pipes 52b; a pair of pressing pieces 129 , each pair of pressing pieces 129 above are respectively formed in two separate guide grooves 126, and use the guide body body 128 as a receiving part to press each nozzle side tube 52b; and a plate-shaped full-area pressing plate 130, which 130 covers the entire area of the open surface of the two individual guide grooves 126, and uses the guide body body 128 as a receiving part to press each nozzle side pipe 52b. In addition, the guide body 128 may be integrally formed with the carriage 41 .

The guide groove 127 is a member that bends the four head-side pipes 52b arranged horizontally in the horizontal plane and in the same plane. Each individual guide groove 126 is a curved path formed by being recessed in a square cross-section and extending along the guided curved shape, and the width of each individual guide groove 126 is slightly narrower than the width of the two nozzle side pipes 52b arranged in the horizontal direction. . That is, each of the individual guide grooves 126 supports and guides the two head-side pipes 52b so that the two head-side pipes 52b are fitted in a horizontal line.

A pair of pressing pieces 129 are formed at the downstream end portion (front end portion in the extending direction) of each individual guide groove 126 , and are formed by extending inwardly from upper ends of both side walls of each individual guide groove 126 . That is, a pair of pressing pieces 129 extending inwardly from the upper ends of both side walls contact the upper surface of each head-side tube 52b to press each head-side tube 52b to the lower side. Furthermore, the pair of pressing pieces 129 are arranged in offset positions with respect to the extending direction of the individual guide groove 126 . In addition, reference numeral 128a in the figure is a punching hole of a mold when forming a pair of pressing pieces 129 .

The full-area pressing plate 130 covers the entire area of the openings of the two individual guide grooves 126 . Specifically, the full-area pressing plate 130 is formed in a planar shape covering the entire area of the upper surface of the guide body 128 . That is, the whole-area pressing plate 130 covering the entire area of the open surface contacts the upper surface of each head-side tube 52b to press each head-side tube 52b to the lower side.

The full-area pressing plate 130 is integrally formed with the movable end of the plate 113 (in other words, the full-area pressing plate 130 is an extension of the plate 113), and the full-area pressing plate 130 is formed on the guide body 128 through the tube holding member 122 and The upper locking piece 128b is locked on the upper surface of the guide body 128 .

In this way, the end portion of the plate 113 on the inkjet head 43 side is fixed to the guide member 121 serving as the lead-out portion. Thereby, the plate 113 can be fixed in a state in which the influence of the bending deformation of the head side pipe 52b is small. In addition, the entire region pressing plate 130 also functions as a protective cover that protects the guide body 128 and the pipe return portion 63 .

FIG. 16( a ) is a perspective view showing the vicinity of the guide unit 114 , showing a state in which the head side pipe 52 b is removed from the state in FIG. 11( b ). As mentioned above, the guide groove 127 which consists of individual guide grooves 126a and 126b is provided in the guide body 128. As shown in FIG.

FIG. 16( b ) is a partial enlarged view of the guide body 128 viewed from the upper side in the vertical direction, and the punched hole 128 a of the die is not shown. As described above, a pair of pressing pieces 129a and 129b provided in the individual guide groove 126a and a pair of pressing pieces 129c and 129d provided in the individual guide groove 126b are formed in the guide body 128 . The pressing piece 129d is smaller than the pressing pieces 129a, 129b, and 129c.

Accordingly, the region of the head-side pipe 52b included in the individual guide groove 126b that is the inner curved path has a greater curvature than the region of the head-side pipe 52b included in the individual guide groove 126a that is the outer curved path. Therefore, the efficiency of the assembly work when the head-side pipe 52b is assembled to the individual guide grooves 126a, 126b by passing between the pair of pressing pieces is improved.

As shown in Fig. 11 and Fig. 12, the pipe holding member 122 has: a support base 131, which is fixed to the carriage 41; The state holds the four nozzle side pipes 52b, and holds the movable end of the plate 113; That is, the support base 131 supports the four head-side tubes 52 b and the plate 113 via the tube clamps 132 .

The pipe clamp 132 includes: a pipe receiving part 137 having a pipe receiving surface 136 for receiving the four nozzle side pipes 52b; and a pipe pressing part 138 fitted to the pipe receiving part 137 in an embedded manner And between the pipe receiving surface 136, press the four nozzle side pipes 52b arranged in the transverse direction. In addition, when fixing the pipe clip 132 to the support base 131, the pipe clip 132 is turned upside down and fixed. That is, it is fixed to the support base 131 so that the tube receiving member 137 is located above and the tube pressing member 138 is located below.

The pipe receiving part 137 has: a pipe receiving surface 136, the pipe receiving surface 136 is used to receive the four sprinkler head side pipes 52b and the plate 113 arranged horizontally; 139, 139 are located at the ends of both sides of the tube receiving surface 136, and are neatly arranged by limiting the width of the four nozzle side tubes 52b arranged in the horizontal direction; and a pair of left and right engaging parts 152, 512, which The portions 152 , 152 are located outside the pair of aligned wall portions 139 , and are engaged with the engaged portions 151 , 151 of the tube pressing member 138 .

Specifically, the four head-side tubes 52b are placed on the tube receiving surface 136 so that the plate 113 is positioned below and the four head-side tubes 52b are positioned above. In addition, a pair of aligned wall portions 139 and 139 abut against the side surfaces of the four head-side pipes 52b arranged in the horizontal direction (the right side surface of the head-side pipe 52b at the right end and the left end surface of the head-side pipe 52b at the left end), Thus, the width of the four head-side pipes 52b is limited.

The nozzle pressing part 138 has: a tube pressing surface 153, the tube pressing surface 153 uses the tube receiving surface 136 as a receiving part to press the four ink tubes arranged in the horizontal direction; The engaging portions 151 , 151 are located at both end portions of the tube pressing surface 153 , and engage with the pair of engaging portions 152 , 152 of the tube receiving member 137 in an embedded manner.

The fixing screw 140 fastens the pipe clamp 132 to the support base 131 and fastens the pipe pressing member 138 attached to the pipe receiving member 137 so as not to move. That is, the fixing screw 140 screw-fastens the pipe pressing member 138 and the pipe clamp 132 to the supporting base 131 by fastening together.

Here, the assembling work of assembling the head-side tube 52b to the tube holding member 122 will be described with reference to FIG. 13 . As shown in FIG. 13 , first, the plate 133 drawn back horizontally is placed on the tube receiving member 137, and the four nozzle side tubes 52b are aligned horizontally and placed on the tube receiving member 137 ( FIG. 13 ( a)).

After mounting the four head-side pipes 52b, the four head-side pipes 52b are positioned. Specifically, positioning in the extending direction and positioning in the width direction are performed for each head-side tube 52b, and at the same time, the twist of the head-side tube 52b is corrected based on the linear marks.

Then, the tube pressing member 138 is fittingly fitted and temporarily fixed to the tube receiving member 137 ( FIG. 13( b )). After the four nozzle side pipes 52b are temporarily fixed, the plate 113 and the four nozzle side pipes 52b whose movable ends are held by the pipe clamp 132 are pulled back into a U-bend shape through the pipe clamp 132, and the pipe clamp 132 is moved up and down. It is reversed and placed on the support base 131 .

Then, the pipe clip 132 is fastened to the support base 131 with the fixing screw 140 ( FIG. 13( c )). Thus, the movable end portion of the head-side tube 52 b (tube bending portion 62 ) is held by the carriage 41 via the tube holding member 122 .

According to this configuration, since it is temporarily fixed in a state where the tube clamp 132 is positioned, and then supported on the support base 131 via the tube clamp 132, it is possible to position the four head-side tubes 52b in a position. Easy to support. In particular, the four head-side pipes 52b can be easily positioned relative to each other, and the four head-side pipes 52b can be supported on the support base 131 in a state connected in parallel. Furthermore, by providing a pair of alignment wall parts 139 and 139, the four head side pipes 52b can be easily aligned.

Furthermore, by providing the tube receiving member 137 with a pair of aligned wall portions 139, 139, the tube pressing member 138 can be assembled in a state where the four head-side tubes 52b are aligned.

Furthermore, by using the fixing screws 140, the four head-side pipes 52b can be firmly held by the pipe clamp 132. In addition, the fixing screw 140 also serves as a fastener for supporting the pipe clamp 132 on the support base 132 , thereby reducing the number of parts and making the pipe holding member 122 a simple structure. Furthermore, since the fastening operation described above can be performed at one time, the assembly operation of the head-side pipe 52b can be smoothly performed.

Furthermore, since the movable side end of the plate 113 is supported on the support base 131 together with the four head-side pipes 52b, no special components are required for fixing the movable side end of the plate 113 . Therefore, the inkjet recording device 1 can be formed into a simple structure.

Furthermore, by providing a linear mark on the peripheral surface of each head-side pipe 52b for visually confirming whether or not the head-side pipe 52b is twisted, each head-side pipe can be distinguished by visually confirming the linear mark. 52b with or without twist. In addition, when there is twist, adjustment can be made based on this mark when performing the above-mentioned temporary fixation, and deformation and instability of the head-side pipe 52b can be prevented beforehand.

As mentioned above, the inkjet type recording apparatus 1 as the liquid ejection apparatus of FIG. 3 and FIG. 5 described in this embodiment includes: the tank unit 3 as the liquid tank; 43 (refer to FIG. 4 ); a flexible head-side pipe 52b as a liquid supply pipe, which is connected to the tank unit 3 and the ink-jet head 43, and supplies the ink in the tank unit 3 to the ink-jet head 43 Carriage 41, the carriage rides on the inkjet head 43, and reciprocates freely; Tube guide 111, the tube guide 111 extends along the extension direction (Y-axis direction) of the nozzle side tube 52b, and extends to the nozzle side tube 52b for guidance, and a threaded hole 1111 is formed at one end in the width direction (X-axis direction) of FIG. The bending deformation of the nozzle side tube 52b caused by the reciprocating action of the frame 41, and the first through hole 1181 corresponding to the threaded hole 1111 is formed at one end in the width direction (X-axis direction) of FIG. 17( a ); and The screw 119 of Fig. 18, this screw 119 uses the first through hole 1181 and the threaded hole 1111 to fix the restricting member 118 to the pipe guide body 111, a hook 1112 is formed at the end of the pipe guide body 111, and, at the end of the restricting member 118 An engaging portion 1189 for engaging the hook 1112 is formed at the end.

According to this configuration, the head-side tube 52b can be fixed to the tube guide body 111, thereby suppressing the vibration accompanying the change of the curved shape of the head-side tube 52b. Therefore, without affecting the movement control of the carriage 41 , it is possible to suppress deterioration in the quality of an image formed by ejecting ink from the inkjet head 43 .

Furthermore, in the present embodiment, the tank unit 3 includes a plurality of ink tanks 51 serving as liquid tanks of yellow, magenta, cyan, and black, and includes a plurality of head-side tubes 52b corresponding to each ink tank 51. .

According to this configuration, it is possible to suppress a change in the shape of the curved portion of each head-side tube 52 b in a state where each head-side tube 52 b is separated in a dispersed manner accompanying the movement of the carriage 41 .

(second embodiment)

In the first embodiment, the hook 1112 is provided on the pipe guide body 111, and the engaging portion 1189 is provided on the restricting member 118, however, in the second embodiment, the hook 1112 is provided on the restricting member, and the engaging portion is provided on the pipe guide body. An inkjet recording device will be described.

FIG. 19( a ) is a perspective view of a restricting member 118 a provided with a hook 1184 as an engaging portion. In the restricting member 118a, a first through hole 1181 is provided at one end in the longitudinal direction (X-axis direction), and an extension 1187 extending downward in the vertical direction Z is formed at the other end, and a hook 1184 is provided on the extension. end of portion 1187. In addition, a pair of pressing portions 1182 are formed on the restricting member 118a. The pair of pressing portions 1182 protrude downward in the vertical direction Z of the restricting member 118a and extend in the longitudinal direction.

Fig. 19(b) is a partial perspective view of the fixed position fixed by the restricting member 118a in the tube guide body 111a. In the pipe guide 111a, a threaded hole 1111 is provided at one end in the width direction (X-axis direction), and a through-hole 1113 is provided at the other end.

Fig. 20(a) is a cross-sectional view showing a state before the nozzle-side tube 52b is clamped by the restricting member 118a and the tube guide 111a. Fig. 20(b) is a cross-sectional view of a state in which the nozzle-side tube 52b is held between the restricting member 118a and the tube guide 111a.

As shown in FIG. 20( a ), the hook 1184 passes through the through hole 1113 , and as shown in FIG. 20( b ), the hook 1184 engages with the engaging portion 1116 . As a result, the nozzle-side tube 52b is pinched and fixed between the restricting member 118a and the tube guide body 111a.

The other configurations of the ink jet recording device of the second embodiment are the same as those of the ink jet recording device 1 of the first embodiment.

(third embodiment)

In the third embodiment, an ink jet recording apparatus that fixes the head-side tube 52 b by engaging a hook provided on a restricting member with a corner portion of the tube guide will be described.

Fig. 21(a) is a cross-sectional view showing a state where the hook 1185 provided on the restricting member 118b is engaged with the corner of the tube guide body 111b1.

One end of the restricting member 118b in FIG. 21(a) is fixed by a screw 119 and a threaded hole 1111, and an extension 1188 extending downward in the vertical direction Z is formed at the other end, and a hook 1185 is provided on the extension 1188. Ends.

A corner portion 1117 between the side wall 117 of the tube guide body 111b1 and the bottom plate portion 116 is formed on the other end side of the restricting member 118b in the tube guide body 111b1. With respect to the corner portion 1117, the hook 1185 is engaged with the corner portion 1117 as an engaging portion, and the nozzle-side pipe 52b is pinched and fixed by the restricting member 118b and the pipe guide body 111b1.

In addition, a protrusion may be provided on the side wall 117 of the tube guide. Fig. 21(b) is a perspective view of a portion where the hook 1185 provided on the restricting member 118b is engaged with the corner of the pipe guide 111b2.

In the state where the hook 1185 is engaged with the corner of the tube guide body 111b2, protrusions protruding in the X-axis direction are provided at positions on both sides of the hook 1185 in the Y-axis direction on the outside of the side wall 117 of the tube guide body 111b2. Section 1114. Accordingly, it is possible to suppress movement of the hook 1185 in the Y-axis direction.

Other configurations of the inkjet recording apparatus of the third embodiment are the same as those of the inkjet recording apparatus 1 of the first embodiment.

(fourth embodiment)

In the fourth embodiment, an inkjet recording device in which the head-side tube 52b is fixed by a tube guide provided with a cutout in the side wall and a restricting member will be described.

The shape of the restriction member in the fourth embodiment is the same as that of the restriction member 1118a of FIG. 19( a ) in the second embodiment.

Fig. 22 is a perspective view showing a state where a notch 1115 is provided in the tube guide body 111c.

A threaded hole 1111 is formed at one end of the pipe guide 111c, and a notch 1115 is formed at the side wall 117 at the other end where the extended portion 1187 in FIG. 19(a) is located.

The extension part 1187 of Fig. 19(a) is arranged in the notch 1115 of Fig. 22, and the hook 1184 is engaged with the bottom plate part 116, and the nozzle side pipe 52b is sandwiched and fixed by the restricting member 118a and the pipe guide 111c.

The other configurations of the ink jet recording device of the fourth embodiment are the same as those of the ink jet recording device 1 of the first embodiment.

FIG. 23 is a partial perspective view showing a case where the tube guide body 111 is provided with two tube fixing portions 112 . As shown in FIG. 23 , the tube guide body 111 may include two tube fixing portions 112 aligned in the Y-axis direction. Accordingly, it is possible to suppress the positional displacement of the head-side pipe 52b.

In addition, in the first to fourth embodiments, the carriage 41 and the support base 131 are formed separately, but the carriage 41 and the support base 131 may be integrally formed. In this case, since the number of components can be reduced, the inkjet recording device 1 can have a simple structure.

In addition, in the first to fourth embodiments, the pair of aligned wall portions 139 are configured to be provided on the pipe receiving member 137. The structure of the pressing member 138 .

In addition, in the first to fourth embodiments, the ink tank 51 is provided outside the exterior cover 15 as a frame, but it may be provided on the exterior cover 15 as long as it is provided outside the carriage 41 . free space inside the .

Claims (9)

1. A liquid injection device, characterized in that, The liquid ejection device has: liquid tank; a liquid ejection head that ejects a liquid; a flexible liquid supply tube connected to the liquid tank and the liquid ejection head, and supplies the liquid in the liquid tank to the liquid ejection head; a carriage carrying the liquid ejection head and configured to freely reciprocate; a tube guide extending in the direction in which the liquid supply tube extends, guiding the liquid supply tube, and having a threaded hole formed at one end in the width direction; a restricting member that extends in the width direction of the tube guide, restricts bending deformation of the liquid supply tube that is deformed by the reciprocating motion of the carriage, and is formed at one end in the width direction. There is a first through hole corresponding to the threaded hole; and a screw for fixing the restricting member to the pipe guide by using the first through hole and the threaded hole, A hook is formed at the other end of one of the tube guide and the restricting member, and a hook to engage with the hook is formed at the other end of the tube guide and the restricting member. the snap part. 2. The liquid ejection device according to claim 1, wherein: An extension portion extending downward in the vertical direction is formed at the other end portion of the restriction member, the hook is formed at an end of the extension, The engaging portion is formed by a corner portion of the other end portion of the tube guide, The hook engages with the corner of the tube guide. 3. The liquid ejection device according to claim 2, wherein: A side wall is formed at the other end of the tube guide, and a pair of protrusions are formed on the side wall to sandwich the extended portion of the restricting member. 4. The liquid ejection device according to claim 2, wherein: A side wall is formed at the other end of the tube guide, The side wall is formed such that a notch is provided at a position where the extension portion of the restricting member is located, The extending part of the restricting part is located in the notch. 5. The liquid ejection device according to claim 1, wherein: the hook is formed at the other end of the tube guide, A second through hole is formed at the other end of the restricting member, The hook protrudes from the second through hole to engage with the engaging portion. 6. The liquid ejection device according to claim 5, wherein: A side wall is formed at the other end of the tube guide, The hook is located further inside than the side wall. 7. The liquid ejection device according to claim 1, wherein: An extension portion extending downward in the vertical direction is formed at the other end portion of the restriction member, the hook is formed at an end of the extension, A through hole through which the hook passes is formed in the pipe guide, The hook protrudes from the through hole of the tube guide and engages with the engaging portion. 8. The liquid ejection device according to any one of claims 1 to 7, wherein: The restricting member includes a protrusion-shaped pressing portion on a surface on the side of the liquid supply tube, and the pressing portion presses the liquid supply tube. 9. The liquid ejection device according to claim 1, wherein: The liquid tank is disposed outside a frame housing the carriage and the tube guide. the

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