WO2011061854A1

WO2011061854A1 - Channel constitution member and inkjet head unit

Info

Publication number: WO2011061854A1
Application number: PCT/JP2009/069719
Authority: WO
Inventors: 司出口
Original assignee: シャープ株式会社
Priority date: 2009-11-20
Filing date: 2009-11-20
Publication date: 2011-05-26

Abstract

Disclosed is a channel constitution member wherein a U-shaped bottom (130b) and a concave eaves (210) are provided as an adhesive holding portion which holds an adhesive material (400) at the lower position of a pipe (201) for upper bend and a pipe (202) for lower bend in the gravity direction, so that the adhesive material (400) stagnates at the bottom (130b) and the concave eaves (210) when the adhesive material (400) is applied in order to reinforce the connection of the pipe (201) for upper bend and the pipe (202) for lower bend with a tube (100), and since the adhesive material (400) can stay, as it is, in the coupling region of a pipe for connection of piping and the tube (100), the adhesive can be cured surely in the coupling region of the pipe for connection of piping and the tube (100) and reliable bonding of the coupling region can be attained. As a result, a channel constitution member and an inkjet head unit, which are adaptable to miniaturization and are capable of reliably preventing the adhesive from entering into the channel without using a fixing member, can be provided.

Description

Flow path component and inkjet head unit

The present invention relates to a flow path component having a pipe connection pipe coupled to a flow path, and an inkjet head unit including the flow path component.

In a flow path component having a flow path formed therein, a connection using a tube as a piping member is generally used as a means for connecting the supply side and the discharge side to the flow path component. A pipe connecting pipe for connecting a tube is formed on the flow path constituting member, and the flow path is formed by fitting and connecting the pipe connecting pipe and the tubes on the supply side and the discharge side. . In the following description, a state where the tube is not connected is simply referred to as a flow path component, and a state where the tube is connected to the flow path component is referred to as a flow path component unit.

The connecting part between the connecting pipe and the tube cannot be said to be a strong connecting state just by being connected by fitting, and a load is applied to the connecting part between the pipe connecting pipe and the tube at the time of assembling. When this occurs, a defect such as a leak occurs at the connecting portion.

Usually, in order to make the connection part between the pipe for pipe connection and the tube strong, an adhesive is applied to the outer periphery of the pipe connection pipe for the purpose of fastening the connection part from the outer periphery using a fixing member and fixing with an adhesive. A method of applying, or a method of fitting and connecting to a pipe for pipe connection after applying an adhesive inside the tip of the tube is used.

Also, JP 2005-212161 A (Patent Document 1) discloses a connection structure between a pipe for pipe connection and a tube using an adhesive.

JP-A-2005-212161

For stable supply into the flow path, the connection between the pipe connection pipe and the tube should be in a strongly bonded state, causing liquid leakage from the connection section, and from the pipe connection pipe. It is very important to prevent the tube from falling off. However, in the method of tightening the connecting portion from the outer periphery using a fixing member, the following problems occur.

That is, since the fixing member only tightens the connecting portion from the outer periphery of the tube, if a force is applied to the tube in the direction in which the tube comes out from the connecting portion, the fixing member moves together with the tube in the direction in which the tube comes out. Easy to come off.

On the other hand, in the method in which the adhesive is applied to the outer periphery of the pipe for pipe connection, in the configuration in which the pipe for pipe connection faces upward, the flow of the adhesive material is small and stable adhesion is possible. However, in a configuration where the pipe connecting pipe is located on the side surface of the flow path component and is in a direction perpendicular to the direction of gravity, the applied adhesive flows and the fitting portion of the tube to the pipe connecting pipe is surely secured. It is difficult to adhere to.

Also, it is possible to bond with an adhesive having a low fluidity, a high viscosity and a high thixotropy, and an adhesive having a short curing time such as an instantaneous adhesive. However, when using such an adhesive, it is necessary to introduce the adhesive near the fitting portion of the tube to the pipe for pipe connection, and in the configuration in which the pipe for pipe connection is formed in a narrow gap portion or the like, Precise work is required.

Also, there is a high risk that the adhesive will enter the flow path from the tip of the pipe for pipe connection due to operational mistakes such as the application position. In addition, in the method of applying the adhesive to the inside of the tip of the tube, it is difficult to apply the adhesive evenly to the inside of the tube, and when fitting the tube to the pipe for pipe connection, There is a high possibility that the applied adhesive will enter the flow path from the pipe connection pipe tip.

In addition, both the method using a fixing member and the method of connecting after applying an adhesive have a problem that it is difficult to cope with downsizing in addition to the above problems. Along with downsizing of the flow path component, the pipe connecting pipe is inevitably small.

For this reason, mounting of a fixing member in a narrow area and application of an adhesive to the outer periphery of a pipe for pipe connection are highly accurate operations, and it is difficult to form a reliable and stable connection state. Accordingly, an object of the present invention is to provide a flow path component member and an ink jet head unit that reliably prevent entry of an adhesive into a flow path without using a fixing member, and that can cope with downsizing. .

In the flow path component according to the present invention, a pipe member provided outside is connected, and the flow path for allowing the liquid to pass is formed inside the main body member. A pipe connection pipe that communicates with the road and is disposed so as to protrude in a substantially horizontal direction from the vertical wall of the main body member; and is provided at least below the gravity connection direction of the pipe connection pipe. And an adhesive holding part for retaining an adhesive used when fixing the piping member to the pipe.

In another mode of the flow path component according to the present invention, the adhesive holding portion is configured so that the gap between the adhesive member and the piping member connected to the piping connection pipe is uniform. It has a curved shape along the outer peripheral surface.

In another form of the flow path component according to the present invention, the vertical wall communicates with the adhesive holding portion and has an upper opening for introducing the adhesive.

In another form of the flow path component according to the present invention, the vertical wall has a recessed area so as to include the pipe connecting pipe, and an upper end portion of the recessed area constitutes the upper opening. And the lower end part of the said dent area | region comprises the said U-shaped adhesive agent holding | maintenance part.

In another aspect of the flow path component according to the present invention, two or more pipe connection pipes are arranged along the direction of gravity.

In another mode of the flow path component according to the present invention, the adhesive holding portion is provided between the pipe connection pipes arranged two or more along the direction of gravity.

In another form of the flow path component according to the present invention, the vertical wall has a lower recess region in which the pipe connection pipe is provided, and an upper recess region that recedes to the main body side from the lower recess region. The adhesive holding portions are provided below the lower dent region and the upper dent region, respectively.

In another form of the flow path component according to the present invention, the pipe connecting pipe bulges outward in the radial direction around the entire circumference on the front end side protruding substantially horizontally from the vertical wall of the main body member. A return is provided.

In the ink jet head unit based on the present invention, the ink head for ejecting ink, the ink filter unit that supplies ink to the ink head and has the above-described flow path component, and the ink head in the ink filter unit And a base unit having a circuit board for providing the ink discharge signal.

According to the flow path constituent member based on this invention, the connection between the pipe for pipe connection and the piping member is provided by providing the adhesive holding part for retaining the adhesive at least in the lower position in the gravity direction of the pipe for pipe connection. When the adhesive material is applied for reinforcement, the adhesive material stays in the adhesive holding portion, so that the adhesive can remain as it is in the connection region between the pipe connecting pipe and the piping member. As a result, it is possible to reliably cure the adhesive in the connection region between the pipe for pipe connection and the piping member, and to reliably connect the connection region.

Next, according to another aspect of the flow path component according to the present invention, by adopting a curved shape along the outer peripheral surface of the pipe connection pipe as the shape of the adhesive holding portion, The gap between the pipe member and the pipe member connected to the pipe becomes uniform, and the introduced adhesive material can be uniformly and efficiently stagnated on the outer periphery of the connection region.

Next, according to another aspect of the flow path component according to the present invention, a vertical wall communicates with the adhesive holding portion and is provided with an upper opening for introducing the adhesive, thereby being close to the connection region. Even in a shape in which it is difficult to apply the adhesive material to the adhesive material, the adhesive material introduced from the upper opening can surely flow into the connection region, so that the connection region can be reliably bonded.

Next, according to another aspect of the flow path component according to the present invention, the upper end of the recessed area constitutes an upper opening, and the lower end of the recessed area constitutes a U-shaped adhesive holding part. As a result, the structure can be simplified and the size can be reduced.

Next, according to another aspect of the flow path component according to the present invention, two or more pipe connection pipes are arranged along the direction of gravity, so that a plurality of openings are not required and the efficiency is high. Adhesive material can be introduced.

Next, according to another aspect of the flow path component according to the present invention, the pipe connection pipe is provided with a burr that bulges outward in the radial direction on the entire circumference on the distal end side of the pipe connection pipe. A gap is formed between the outer peripheral surface of the pipe and the inner peripheral surface of the piping member, and the adhesive material can be positively introduced into the gap.

The burr prevents the pipe member from being pulled out of the pipe connection pipe, and the burr acts as a weir to prevent the adhesive material from entering the pipe member and the flow path through the pipe connection pipe. It becomes possible to prevent.

Next, according to the ink jet head unit based on the present invention, there is no dropout of the pipe member from the pipe for pipe connection and no liquid leakage at the connecting portion, and the ink jet head is highly reliable and compatible with downsizing. Units can be provided.

FIG. 2 is a perspective view illustrating a configuration of an ink jet head unit to which a filter unit serving as a flow path constituting member in the first embodiment is applied. FIG. 3 is a partial exploded perspective view showing a configuration of the inkjet head unit in Embodiment 1 and showing a state where a cover member is removed. 2 is a diagram illustrating a configuration of a base unit employed in the ink jet head unit in Embodiment 1. FIG. 2 is a perspective view illustrating a configuration of a filter unit employed in the ink jet head unit according to Embodiment 1. FIG. 2 is an exploded view showing a configuration of a filter unit employed in the ink jet head unit in Embodiment 1. FIG. FIG. 3 is a perspective view when the filter unit employed in the ink jet head unit in Embodiment 1 is viewed from the pipe connecting pipe side. It is a figure at the time of seeing the filter unit employ | adopted for the inkjet head unit in Embodiment 1 from the pipe connection pipe side. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7 in a state where the tube is connected. FIG. 8 is a cross-sectional view corresponding to the view taken along line VIII-VIII in FIG. 7 in a state in which the tube in the second embodiment is connected. It is a perspective view at the time of seeing the filter unit employ | adopted for the inkjet head unit in Embodiment 3 from the pipe for pipe connection. FIG. 8 is a cross-sectional view corresponding to the view taken along the line VIII-VIII in FIG. 7 with the tube connected.

Each embodiment of the present invention will be described below. In each of the embodiments described below, the case where the flow path component member and the flow path structure unit of the present invention are applied to an inkjet head unit as an application example of the present invention has been described. Is not limited to the ink jet head unit, and the flow path constituting member and the flow path constituting unit of the present invention can be applied to apparatuses having widely similar configurations.

For example, the flow path constituting member and the flow path constituting unit of the present invention can be provided for an apparatus including a supply tube connecting portion of an ink supply device, a tube connecting portion of a liquid separation device, and other tube connecting portions. is there.

In the embodiments described below, the same or corresponding parts are denoted by the same reference symbols, and the description thereof may not be repeated. Further, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified.

<Embodiment 1>
Hereinafter, an inkjet head unit according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing a configuration of an inkjet head unit 1 to which a filter unit 3 serving as a flow path constituting member in the present embodiment is applied, and FIG. 2 shows a configuration of the inkjet head unit 1. FIG. 3 is a partially exploded perspective view showing a state where the cover member 18 is removed, and FIG. 3 is a view showing a configuration of the base unit 2 employed in the inkjet head unit 1 in the embodiment.

(Inkjet head unit 1)
With reference to FIGS. 1 and 2, the inkjet head unit 1 includes a cover member 18, a base unit 2, and a filter unit 3. The cover member 18 is disposed so as to cover the ink discharge side surfaces of the base unit 2 and the filter unit 3 coupled to each other, and the gap with the head chip 11 is sealed with an adhesive.

(Base unit 2)
The configuration of the base unit 2 will be described with reference to FIG. The basic configuration of the base unit 2 is symmetrical. The base unit 2 includes a head base 13, a chip mount 12, a head chip 11, a flexible substrate 26, a driver substrate 4, and

manifolds

14A and 14B.

The head base 13 is made of a metallic material. In the present embodiment, SUS (linear expansion coefficient of about 11 × 10 −6 m / K) is used as the material for the head base 13. The head base 13 has a convex pedestal (not shown) formed on the surface thereof, and the cross section has an inverted T-shape.

The chip mount 12 is bonded to the pedestal portion with an adhesive. The chip mount 12 is made of alumina (linear expansion coefficient: about 4 × 10−6 m / K). The head chip 11 is bonded to the chip mount 12 via an adhesive. In the present embodiment, an epoxy adhesive is used as the adhesive.

However, the type of adhesive is not limited to that of the present embodiment. The driver base 4 is attached to the head base 13 and is connected to the head chip 11 via the flexible board 26.

(

Manifold

14A, 14B)
Next, the

manifolds

14A and 14B will be described. The

manifolds

14A and 14B are made of PEEK (polyether ether ketone). The

manifolds

14A and 14B have a symmetrical shape. Inside the

manifolds

14A and 14B,

liquid flow paths

16A and 16B to be continuous with the common liquid chamber are formed.

When the

manifolds

14A and 14B are attached to the base unit 2, a plurality of positioning pins provided on the base unit 2 are fitted into a plurality of positioning holes provided on the

manifolds

14A and 14B, respectively.

Furthermore, the manifolds 14 A and 14 B are fixed to the base unit 2 by fitting screws into the plurality of female screw portions provided in the manifolds 14 A and 14 B through the plurality of through holes provided in the base unit 2. . As a result, the

liquid flow paths

16A and 16B formed in the

manifolds

14A and 14B are connected to and communicated with the liquid inlet and the liquid outlet (not shown) formed in the head chip 11.

(Filter unit 3)
Next, the configuration of the filter unit 3 will be described with reference to FIGS. FIG. 4 is a perspective view showing the configuration of the filter unit 3, and FIG. 5 is an exploded view showing the configuration of the filter unit 3. 6 is a perspective view when the filter unit 3 is viewed from the pipe connecting pipe side, FIG. 7 is a view when the filter unit 3 is viewed from the pipe connecting pipe side, and FIG. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7 in a state where the tube 100 is connected.

4 and 5, the filter unit 3 constituting the flow path component member includes bottomed rectangular tube-shaped

housings

161 and 162 opened on one side. Note that the bottomed rectangular tube-shaped recess 300 formed in the housing 161 has a shape as shown in FIG. The

housings

161 and 162 are made of PEEK (polyether ether ketone).

The

housings

161 and 162 are joined so that the open surfaces overlap each other. Further, the filter plate 164 is disposed so as to be sandwiched between the

housings

161 and 162. An annular groove (not shown) that holds the annular packing is formed on the housing 161 side.

An annular packing 165A having a substantially L-shaped cross section is disposed in the annular groove. In the present embodiment, perfluoro rubber is used as the material of the packing 165A. The housing member 162 is formed with an annular filter support for supporting the end of the filter plate 164.

In the liquid chamber of the housing 162, a flow path to be communicated with the first opening 57A (see FIG. 3) in the manifold 14A is formed. Further, a vent channel (not shown) to be communicated with the first opening 56A of the manifold 14B is formed in the housing 162. The vent channel is connected to the liquid storage unit via a vent channel formed in the housing 161.

6 to 8, the filter unit 3 includes four pipe connection pipes: a liquid supply pipe 200, an upper vent pipe 201, a lower vent pipe 202, and a liquid storage pipe 203. Is provided. In this embodiment, the

housings

161 and 162 which are flow path component main bodies are formed of polyether ether ketone (PEEK), and four pipe connection pipes are formed of SUS303.

The four pipe connection pipes are press-fitted into the flow path component and communicate with the internal flow path. The pipe for pipe connection after press-fitting has a protruding length (h1) from a side surface of a recessed area 130 described later of about 4 mm. The protruding pipe connection pipe has a cylindrical shape with an outer dimension (outer diameter) of about 2 mm.

In the present embodiment, a configuration in which a pipe connection pipe is separately formed and press-fitted is adopted, but a configuration in which the main body is formed using a material constituting the main body, such as PEEK or polypropylene (PP), may be employed. . Three U-shaped recessed regions 130 are provided on the vertical walls 163 of the

housings

161 and 162 located on the outer periphery of each pipe connection pipe.

In the vertical wall 163, an upper opening 130 a for introducing an adhesive material into the recessed area 130 is provided above the recessed area 130 to serve as an adhesive inlet. The lower part of the recessed area 130 has a bottom part 130b as a U-shaped adhesive holding part. The bottom portion 130b has a function of stagnating the introduced adhesive material and forming a liquid reservoir of the adhesive material.

The U-shaped dent region 130 is formed with a width (W) of about 5 mm and a dent depth (d1) of about 1.5 mm. Since the outer diameter (outer diameter) of the pipe for pipe connection is about 2 mm, and the outer diameter (outer diameter) of the tube 100 to be connected is about 4 mm, in this embodiment, the side surface of the recessed region 130 and the tube 100 Between, it is comprised so that about 0.5 mm clearance gap (S) may be made.

On the other hand, in the present embodiment, in the pipe for connecting pipes, the upper vent pipe 201 and the lower vent pipe 202 arranged substantially at the center are formed in a vertical straight line (arranged along the direction of gravity). Therefore, a concave eaves portion 210 as an adhesive holding portion is formed in the lower portion of the upper vent pipe 201 to stagnate the adhesive material. The concave eaves part 210 has the same function as the U-shaped bottom part 130 b of the recessed area 130.

In order to allow the adhesive material introduced from the upper opening 130a of the recessed area 130 to flow into the lower vent pipe 202, a gap 230 is formed between the recessed eaves part 210 and the side wall 130w of the recessed area 130. Is formed. The gap 230 is about 0.5 mm.

(Method of fitting and fixing tube 100 to pipe for pipe connection)
As shown in FIG. 8, the tube 100 is shown connected to each of the upper vent pipe 201 and the lower vent pipe 202 of the filter unit 3. In addition, the fitting method of the tube 100 to the pipe for pipe connection shown below is the same for the liquid supply pipe 200 and the liquid storage pipe 203.

In this embodiment, when fitting the tube 100 to the upper vent pipe 201 and the lower vent pipe 202, the adhesive material is not applied before the tube 100 is fitted, and the tube 100 is removed from the upper vent. It connects to the pipe 201 for a pipe and the pipe 202 for a lower vent.

Thereafter, the adhesive material 400 is introduced from the upper opening 130 a of the recessed region 130. The adhesive material 400 introduced from the upper opening 130a first flows from the upper part to the lower part of the connection part with the tube 100 of the upper vent pipe 201.

The adhesive material 400 that has flowed toward the lower part is divided into one that stays in the concave eaves part 210 and one that flows into the connection part between the lower vent pipe 202 and the tube 100 through the gap 230. The adhesive material 400 overflowing from the concave eaves portion 210 flows into the connecting portion of the lower vent pipe 202 with the tube 100 from the gap 230. The adhesive material 400 that has flowed into the connection portion of the lower vent pipe 202 with the tube 100 stagnates at the bottom 130 b of the recessed region 130.

Since the adhesive material 400 introduced into the recessed area 130 is stagnated in the vicinity of the connection portion with the tube 100 in both the upper vent pipe 201 and the lower vent pipe 202, the stagnant adhesive material 400 is connected by capillary action. It penetrates into the gap between the outer circumference of each pipe and the inner circumference of the tube 100, and bonds the inside of the connecting portion between the outer circumference of each pipe and the tube 100.

Note that the gap between the outer circumference of each pipe and the inner circumference of the tube 100 and the gap between the tip of the tube 100 and the

housings

161 and 162 are about tens of μm. Can penetrate into the gap.

Also, the adhesive material 400 is cured at a stagnant position and becomes a curing agent for adhering the filter unit 3 main body and the outer periphery of the tube 100 to realize a stronger adhesion state. In this embodiment, an epoxy-based adhesive is used as the adhesive material 400, and two types of viscosity of 400 cp and 4000 cp are used as material characteristics, and the curing characteristics are about 2 to 3 hours at room temperature. A material having a material characteristic that loses fluidity and cures in about 12 hours is used.

As a method for introducing the adhesive material 400, an appropriate amount is dropped from the upper opening 130a into the recessed area 130 by a dispenser and introduced into the bottom 130b of the recessed area 130. However, the type of adhesive is not limited to that of the present embodiment.

In addition, in fitting the tube 100 to the liquid supply pipe 200 and the liquid storage pipe 203, the liquid supply pipe 200 and the liquid can be obtained by introducing an appropriate amount of the adhesive material 400 with a dispenser in the same manner as described above. While the outer periphery of the housing pipe 203 and the inside of the connecting portion between the tube 100 are bonded, the filter unit 3 main body and the outer periphery of the tube 100 are bonded and fixed by an adhesive material. Thus, the tube 100 is fixed to each of the four pipe connection pipes using the adhesive material 400, whereby the flow path constituting unit is completed.

In the above embodiment, from the viewpoint of promoting the fluidity of the adhesive material 400, the

housings

161 and 162 are provided with the vertical walls 163, and the pipe connection pipes are provided so as to extend from the vertical walls 163 in the horizontal direction. However, the present invention is not necessarily limited to this configuration. Depending on the fluidity of the adhesive material 400, it is possible to adopt a configuration in which the vertical wall 163 is not perpendicular to the horizontal direction but a predetermined inclination angle is provided. Also, the connection angle of the pipe for pipe connection can be appropriately selected according to the fluidity of the adhesive material 400.

As described above, according to the inkjet head unit 1 in the present embodiment, the gravity direction of the four pipe connection pipes of the liquid supply pipe 200, the upper vent pipe 201, the lower vent pipe 202, and the liquid storage pipe 203. In order to reinforce the connection between the pipe for pipe connection and the tube 100 by providing the U-shaped bottom part 130b and the concave eaves part 210 as an adhesive holding part for retaining the adhesive material 400 in the lower position of When the material 400 is applied, the adhesive material 400 stagnates in the bottom portion 130b and the concave eaves portion 210, so that the adhesive material 400 can remain in the connection region between the pipe connection pipe and the tube 100. In the connection area between the pipe for pipe connection and the tube 100, the adhesive is securely cured. It is possible to secure bond of the coupling region.

Further, by adopting a curved shape along the outer peripheral surface of the pipe connecting pipe as the shape of the bottom part 130b and the concave eaves part 210, the gap with the tube 100 connected to the pipe connecting pipe becomes uniform and introduced. The adhesive material 400 can be uniformly and efficiently stagnated on the outer periphery of the connection region.

In addition, the vertical wall 163 of the

housings

161 and 162 communicates with the bottom portion 130b and the concave eaves portion 210 and is provided with an upper opening portion 130a for introducing an adhesive, so that the adhesive material 400 is applied near the connection region. Even if the shape is difficult, the adhesive material 400 introduced from the upper opening 130a can be surely poured into the connection region, and the connection region can be reliably bonded.

Further, by adopting the recessed region 130 in which the upper end portion forms the upper opening portion 130a and the lower end portion forms the U-shaped bottom portion 130b, the structure can be simplified and the size can be reduced.

In addition, by arranging the upper vent pipe 201 and the lower vent pipe 202 arranged substantially in the center along the direction of gravity, a plurality of openings are not required, and bonding can be efficiently performed from one upper opening 130a. The agent material 400 can be introduced.

Thus, by applying the flow path constituting member having the above-described configuration to the ink jet head unit, the tube 100 is not dropped from the pipe connection pipe, and no ink leaks at the connecting portion, which is highly reliable. In addition, it is possible to provide an ink jet head unit corresponding to downsizing.

<Embodiment 2>
Next, the structure of the ink jet head unit according to the second embodiment based on the present invention will be described with reference to FIG. 9 is a cross-sectional view taken along the line VIII-VIII in FIG. 7 with the tube 100 connected. In the present embodiment, the basic structure is the same as the structure of the inkjet head unit in the first embodiment, and the difference is that the shape of the pipe for pipe connection is different.

As shown in FIG. 9, in the present embodiment, the pipe for pipe connection as the liquid supply pipe, the upper vent pipe, the lower vent pipe, and the liquid storage pipe are arranged vertically to the

housings

161 and 162. A burr 221 that bulges outward in the radial direction is provided on the entire circumference of the distal end portion on the discharge side from the wall 163, and a pipe portion 222 extends from the burr 221.

By adopting the pipe connection pipe 220 having such a shape, a gap is formed between the outer peripheral surface of the pipe portion 222 and the inner peripheral surface of the tube 100, and the adhesive material 400 is positively introduced into this gap. Can be made. The gap S is set to a size of about 0.1 mm to 0.2 mm.

Further, by providing the burr 221, the tube 100 can be prevented from being pulled out from the pipe connection pipe 220, and the burr 221 serves as a weir to enter the tube 100 and the flow path through the pipe connection pipe. It becomes possible to prevent the intrusion into.

<Embodiment 3>
Next, the structure of the inkjet head unit according to Embodiment 3 based on the present invention will be described with reference to FIGS. Moreover, in this Embodiment, although the case where the pipe for pipe connection 220 demonstrated in the said Embodiment 2 is employ | adopted is shown, the form of the pipe for pipe connection demonstrated in the said Embodiment 1 is employ | adopted. Is also possible. 10 is a perspective view when the filter unit 3 is viewed from the pipe connecting pipe side, and FIG. 11 is a cross-sectional view corresponding to the line VIII-VIII in FIG. 7 with the tube 100 connected. FIG.

In the present embodiment, the basic structure is the same as the structure of the ink jet head unit in the first and second embodiments, and the difference is the U-shape provided on the vertical walls 163 of the

housings

161 and 162. It is in the form of a recessed area. In addition, only the form of the recessed area | region provided in a center part differs, and the form of the recessed area 130 provided in both sides is the same form as the recessed area 130 in the said

Embodiment

1 and 2. FIG.

The recessed area provided in the central part is provided with a lower recessed area 130D where the lower vent pipe 202 is provided and an upper vent pipe 201, and the upper stage retracted about 1.5 mm further toward the housing 161 than the lower recessed area 130D. It has a recessed area 130U.

The form of the lower recessed area 130 D and the upper recessed area 130 U is the same as that of the recessed area 130. As a result, the upper opening 130a is provided above the lower recessed area 130D and the upper recessed area 130U, and the bottom 130b as an adhesive holding part is provided below.

Also by adopting this configuration, it is possible to obtain the same operational effects as in the case of the first embodiment.

Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Inkjet head unit, 2 base unit, 3 filter unit, 4 driver board, 11 head chip, 12 chip mount, 13 head base, 14A, 14B manifold, 16A, 16B liquid flow path, 18 cover member, 26 flexible board, 56A , 57A 1st opening, 100 tube, 130 recessed area, 130a upper opening, 130b bottom, 130w side wall, 130D lower recessed area, 130U upper recessed area, 161, 162 housing, 163 vertical wall, 164 filter plate, 165A packing , 200 Liquid supply pipe, 201 Upper vent pipe, 202 Lower vent pipe, 203 Liquid storage pipe, 210 Concave eaves part, 220 Pipe connection pipe 221 hatch, 222 pipe portion, 230 gap, 300 recess, 400 adhesive material.

Claims

The pipe member (100) provided outside is connected, and the flow path (F) for allowing the liquid to pass therethrough is a flow path constituting member formed inside the main body members (161, 162),
Pipe connection pipes (200, 201, 202, 203) that communicate with the flow path and are arranged to protrude in a substantially horizontal direction from the vertical wall (163) of the main body member (161, 162);
When the pipe member (100) is fixed to the pipe connection pipe (200, 201, 202, 203) provided at least in the lower position in the gravity direction of the pipe connection pipe (200, 201, 202, 203). An adhesive holding part (130b, 210) for retaining the adhesive used in
A flow path component comprising:
The adhesive holding part (130b, 210) is used for pipe connection so that a gap between the pipe connection member (100) connected to the pipe connection pipe (200, 201, 202, 203) is uniform. The flow path component according to claim 1, which has a curved shape along the outer peripheral surface of the pipe (200, 201, 202, 203).
The flow path configuration according to claim 1, wherein the vertical wall (163) has an upper opening (130a) for communicating with the adhesive holding portion (130b, 210) and for introducing an adhesive. Element.
The vertical wall (163) has a recessed region (130, 130D, 130U) so as to include the pipe connection pipe (200, 201, 202, 203),
The upper end of the recessed area (130, 130D, 130U) constitutes the upper opening (130a),
The flow path component according to claim 3, wherein a lower end portion of the recessed region (130, 130D, 130U) constitutes the U-shaped adhesive holding portion (130b).
2. The flow path component according to claim 1, wherein two or more pipe connection pipes (201, 202) are arranged along the direction of gravity.
2. The flow path component according to claim 1, wherein the adhesive holding portion (210) is provided between the pipe connection pipes (201, 202) disposed two or more along the weight direction. .
The vertical wall (163) includes a lower recess region (130D) where the pipe connection pipes (201, 202) are respectively provided, and an upper recess region (130U) that recedes from the lower recess region (130D) toward the main body. Have
The flow path component according to claim 1, wherein the adhesive holding portion (130a) is provided below the lower depression area (130D) and the upper depression area (130U), respectively.
The pipe for pipe connection (220) has a burr (211) that bulges outward in the radial direction from the vertical wall (163) of the main body member (161, 162) to the front end side protruding in a substantially horizontal direction. The flow path constituent member according to claim 1, which is provided on the entire circumference.
An ink head (11) for discharging ink;
In order to supply ink to the ink head (11), a pipe member (100) provided outside is connected, and a flow path (F) for allowing liquid to pass through is formed inside the main body members (161, 162). An ink filter unit (3) having a flow path constituting member,
A base unit (2) having a circuit board for giving an ink ejection signal to the ink head (11) in the ink filter unit (3);
With
The flow path constituting member communicates with the flow path (F), and is connected to a pipe for connecting a pipe (200) that protrudes in a substantially horizontal direction from the vertical wall (163) of the main body member (161, 162). , 201, 202, 203),
When the pipe member (100) is fixed to the pipe connection pipe (200, 201, 202, 203) provided at least in the lower position in the gravity direction of the pipe connection pipe (200, 201, 202, 203). An adhesive holding part (130b, 210) for retaining the adhesive used in
Inkjet head unit.