JPH11170564A - Method for jointing tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for fixing a tube to a hole in the body through a tube jointing member in which the tube and the tube jointing member can be assembled with no gap by setting the diameter of a tube insertion hole in the tube jointing member smaller than the outside diameter of the tube. SOLUTION: In an ink jet recorder employing a tube for carrying a liquid or gas medium, a tube jointing member 2 is boded through an adhesive to a hole 1a in the body 1 and a tube 4 is inserted into a hole 2a of the tube jointing member 2 and fixed in place. The tube 4 is made of vinyl chloride or a metallic material, e.g. copper, which is at least as hard as the tube jointing member 2. At the time of jointing tubes, the tube 4 is inserted in the direction of arrow A under a state where the jointing member 2 is boded to the hole 1a in the body 1 in order to enlarge the inside diameter of the hole 2a equal to the the outside diameter of the tube 4 thus fixing the tube tightly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube joining method for an apparatus for transporting a medium such as a liquid or gas using a tube in an ink jet recording apparatus, and more particularly, to ink jet recording for printing characters or images by discharging ink. The present invention relates to a method for joining an ink tank and an ink ejection head of an apparatus.

[0002]

2. Description of the Related Art Conventionally, in a printer such as an ink jet recording apparatus for transporting a medium such as a liquid or a gas, an operation of piping a tube has been performed to connect an ink discharge head to a supply section of the liquid or the gas. I have. An example of such a conventional tube assembling method is, for example, a joining method shown in FIG.

As shown in FIG. 19, in a conventional method, after a tube 102 for carrying a liquid or gaseous medium is inserted into a hole 101 formed in a main body 100, a material such as silicon or epoxy resin is inserted. A sealing material, that is, a sealing material 103 is filled in a gap between the hole 101 of the main body 100 and the tube 102, and a storage room 104 inside and outside the main body 100.
Is sealed off from the outside air 105 to prevent leakage of liquid or gas.

[0004]

However, according to the conventional method shown in FIG. 19, since the liquid sealing material 103 is used, the sealing material 103 is There was a problem that the liquid crystal flowed into the tube 102 from a gap between the hole 101 and the tube 102 and was mixed into a liquid or a gas. In addition, it takes several minutes to several hours for the seal material 103 to be solidified, and in the case of performing continuous assembling processing, the parts are temporarily stored in a storage place during the assembling work to perform sufficient hardening curing. There must be.

There is also a press-fit type joining method in which the tube 102 is directly press-fitted into the hole 101 of the main body 100 without using the above-mentioned sealing material. If not managed properly, problems such as leakage of liquid and gas are observed.

In addition, the tube 102 is connected to the rigid body 100
The press-fit type joining method of press-fitting the
Since the assembling cannot be performed unless the tube 102 is finely positioned and the force is applied when inserting the tube 02, it is extremely difficult to automate the assembling operation.

Accordingly, an object of the present invention is to eliminate such a conventional problem without the need for the post-assembly waiting time required for the joining method using a sealing material and for the press-fitting joining method. Another object of the present invention is to provide a tube joining method suitable for automatic assembling in which a tube can be easily inserted without requiring fine positioning or how to apply a force.

[0008]

In order to achieve the above object, a tube joining method according to the present invention comprises a tube joining method for attaching a tube to a hole of a body to be attached via a tube joining member. The tube insertion hole of the member is constituted by a hole smaller in diameter than the tube outer diameter.

The tube joining method of the present invention is characterized in that a cylindrical cut is formed in the outer diameter of the tube joining member in a direction perpendicular to the tube insertion direction.

Furthermore, the tube joining method of the present invention is characterized in that a plurality of cylindrical cuts formed perpendicular to the tube insertion direction are provided.

Further, the tube joining method of the present invention comprises:
At least one of the cylindrical protrusions formed by the cylindrical cuts formed perpendicular to the tube insertion direction of the tube joining member is divided in the tube insertion direction.

In addition, the tube joining method of the present invention comprises:
A cylindrical projection formed by a cylindrical cut formed perpendicular to the tube insertion direction of the tube joining member has an outer diameter tip portion formed on a concave surface.

According to the tube joining method of the present invention, a groove is formed substantially at the center of the tube insertion direction at the tip of the outer diameter of a cylindrical projection formed by a cylindrical cut formed perpendicular to the tube insertion direction of the tube joining member. It is characterized by the following.

Further, according to the tube joining method of the present invention, a projection is provided on the outer periphery of the tube joining member, and a groove for fitting with the projection of the tube joining member is provided in a part of a hole of the main body into which the tube joining member is inserted. It is characterized by having.

Further, according to the tube joining method of the present invention, a projection having a diameter larger than the outer diameter is provided on the outer periphery of the tube.
It is characterized in that a part of the inner diameter of the tube joining member has a groove for fitting with the projection of the tube.

Still further, the tube joining method of the present invention comprises:
In an apparatus in which a tube is assembled to a hole of a mounting body via a tube connecting member, the mounting hole is formed in a curved surface in a tube insertion direction, and the tube connecting member surface in contact with the mounting body hole is attached to the mounting body. It is characterized by having a curved surface slightly larger in curvature than the curved surface of the hole, and having a hole having a diameter slightly smaller than the outer diameter of the tube in the tube joining member.

In addition, the tube joining method of the present invention comprises:
It is used for connecting an ink tank and an ink discharge head of an ink jet printer capable of printing characters or images by discharging ink.

As described above, according to the present invention, the tube joining method according to the present invention is a tube joining method in which a tube is attached to a hole of a main body to be attached via a tube joining member. Since the tube joining member or the tube insertion hole is constituted by a hole having a slightly smaller outer diameter than the tube outer diameter, simply inserting the tube into the hole allows the tube and the tube joining member and the tube joining member and the body opening to be tightly closed. Since it is possible to assemble and insert the tube easily, the work efficiency is increased and the work cost is reduced. In addition, since the assembling device can be assembled with an easy device, the equipment cost for the device is increased. Can be reduced, the use of automatic assembling machines can be simplified, the cost can be reduced, and mass production can be easily handled. By forming a cut in the outer diameter of the tube connecting member perpendicularly to the tube insertion direction, the allowable displacement of the tube connecting portion can be increased, and thus the clearance tolerance of the tube and the tube connecting member can be increased. It is possible to increase the dimensional tolerance of the joint member and the main body hole, which has the effect of facilitating the processing of the parts, and also facilitates the processing of the parts, thereby facilitating the quality control of the parts. This is effective in reducing the amount of rust. Furthermore, by forming a plurality of cuts in the tube joining member perpendicular to the tube insertion direction, liquids and gases are prevented from leaking from the storage chamber to the outside air in a plurality of stages on a plurality of surfaces perpendicular to the tube insertion direction. This makes it possible to more reliably prevent leakage.

Further, by combining the above embodiments, it is possible to fix the mounting hole of the main body and the tube connecting member, and the tube connecting member and the tube only by inserting the tube, and at the same time, the liquid or the gas is removed. It is possible to prevent leakage from the storage room to the outside air.

The effect of the present invention when it is used for connecting an ink tank and an ink discharge head of an ink jet printer capable of printing characters or images by discharging ink will be described. The characteristics of the connection between the ink and the ink discharge head of the ink jet printer capable of printing characters or images by discharging the ink include a narrow arrangement interval, a large production amount, and low cost. Hereinafter, these will be described in order.

A recent ink jet printer can print a color image and has a plurality of ink ejection heads corresponding to a plurality of colors. Therefore, a plurality of ink supply tubes are also required. I have. Further, since the ink discharge section has a structure in which ink discharge heads corresponding to a plurality of colors are integrated, particularly, the ink supply tubes to the ink discharge head must be arranged at narrow intervals. In addition, heads for inkjet printers
Mass production of several million units per month is required. Further, in response to the recent price reduction in the market, assembly at lower cost is required.

With respect to the above requirements, the present invention can connect the ink tank and the ink discharge head only by inserting the tube, so that a plurality of tubes can be arranged at a narrow interval. Since it is possible to assemble with a simple operation, automation can be easily performed. In addition, since a bonding step which requires time until completion is not required, it is possible to cope with mass production. Further, the assembly can be performed by an automatic machine having a simple mechanism, and the working time can be shortened, so that the assembly cost can be reduced.

Other objects, features and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a tube joining method according to the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIGS. 1 and 2 are sectional views showing a first embodiment of a tube joining method according to the present invention.

As shown in the figure, in the tube joining method of the present invention, a substantially cylindrical tube joining member 2 is fixed to a hole 1a provided in the main body 1 using an appropriate adhesive. The tube 4 is inserted into the hole 2a of the joining member 2 and attached.

In this embodiment, the main body 1 is preferably made of a hard plastic material, and is also made of a suitable hard material such as vinyl chloride, fluororesin, metal, wood, and the like.

The tube joining member 2 is made of an elastic member such as silicone rubber or urethane rubber, and has a hole 2a for inserting and attaching the tube 4, and the tube 4 in the tube insertion direction (the direction of arrow A in the figure). An appropriately tapered inclined surface 3 for guiding is formed. The tube 4 has a circular tubular shape, and is preferably made of a metal material such as polyethylene, polypropylene, vinyl chloride, or copper, or a material that is at least equal to or more rigid than the tube joining member 2.

With the body 1, the tube joining member 2 and the tube 4, the tube 4 is first moved in the direction indicated by an arrow A in a state where the tube joining member 2 is fixed to the hole 1a of the body 1 as shown in FIG. By inserting the tube joining member 2 in the direction, the inner diameter of the hole 2a is expanded to the outer diameter of the tube 4, and the tube joining member 2 is attached in a state in which it is in close contact with the state of FIG.

Therefore, in the state shown in FIG. 2, since the tube connecting member 2 is formed of an elastic member,
The tube 4 has a restoring force to return to the state of
A pressing force is applied in the direction of pressing the tube from the surroundings to fill the gap between the tube joining member 2 and the tube 4 and keep it in a nectar, thereby preventing the liquid or gas from leaking from the storage room 5 to the outside air 6. It becomes possible.

(Embodiment 2) FIGS. 3 and 4 are cross-sectional views showing a second embodiment of the tube joining method according to the present invention. The same members as those in the first embodiment shown in FIG. And are made of the same material. Therefore, in this embodiment, the main body 1 is made of a suitable hard material such as a hard plastic material, vinyl chloride, fluororesin, metal, wood, etc., and the tube joining member 2 is made of an elastic member such as silicon rubber or urethane rubber. The tube 4 is made of a metal material such as polyethylene, polypropylene, vinyl chloride, or copper.

In FIG. 3, a substantially cylindrical tube joining member 7 is formed so as to have a ring-shaped, ie, ring-shaped projection 8 and a void 9 on a surface of the main body 1 which is substantially in contact with the hole 1a. In the second embodiment configured as described above,
When the tube 4 is inserted in the direction of arrow A in the figure, the state shown in FIG. 4 is obtained. As illustrated, when the tube 4 is inserted into the tube joining member 7, the inner diameter of the tube joining member 7 is expanded to the outer diameter of the tube 4. Therefore, the projection 8 is pressed against the hole 1 of the main body and deformed. Since the tube joining member 7 is made of an elastic member such as silicon rubber or urethane rubber, it has a restoring force to return to the state shown in FIG. 3. Therefore, the projection 8 connects the tube joining member 7 to the hole 1 of the main body. While pressing, the joining member 7 on the same surface as the projection 8
Presses the tube joining member 7 firmly against the tube 4 at a position 10 where the tube joining member 10 contacts the tube 4.

That is, only by inserting the tube 4,
It is possible to obtain a pressing force between the tube 4 and the tube joining member 7 and between the tube joining member 7 and the hole 1a of the main body 1 so as to be tightly held, whereby the liquid or the liquid from the storage chamber 5 to the outside air 6 can be obtained. Gas leakage is prevented.

FIG. 5 is a perspective view showing an example of the tube joining member 7 described above. In this embodiment, the projections 8 are formed in a three-stage ring shape, and the ring-shaped projections 8 are configured in three stages.

That is, in this embodiment, the tube joining member 7 is pressed against the hole 1 a of the main body 1 and the tube 4 by the three-stage ring-shaped projection 8, so that the storage room 5 is formed.
And the outside air 6 can be shut off three times. Therefore,
The tube 4 and the tube joining member 7 and the tube joining member 7 and the hole 1a of the main body 1 are shielded in a plurality of stages only by a simple assembling operation for inserting the tube 4, so that the liquid from the storage room 5 to the outside air 6 is removed. Gas leakage can be prevented.

(Embodiment 3) FIG. 6 is a view showing a third embodiment using comb-shaped projections 11 and 12 obtained by further dividing the ring-shaped projection 8 shown in FIG. is there. Also in this embodiment, the main body 1 is made of an appropriate hard material such as a hard plastic material, vinyl chloride, fluororesin, metal, wood, etc., and the tube joining member 2 is made of an elastic member such as silicon rubber or urethane rubber. .

Due to the liquid or gas to be sealed, or the material and hardness of the tube joining member and the tube, the pressing pressure becomes uneven even in the rare case of the ring-shaped multi-stage partition shown in FIG. In this embodiment, as shown in FIG. 6, the comb-shaped protrusions 11, 12 in which the ring-shaped protrusions are partially removed are connected to the tube joining member as a countermeasure to prevent the risk. 7.

The reason why the pressing pressure becomes non-uniform in the ring-shaped multi-stage partition shown in FIG. 5 is that the tube connecting member 7 is uniformly spread in accordance with the ideal spread of the tube connecting member 7 when the tube is inserted. This is due to the fact that only a local part is spread without being used.

Next, such a phenomenon that only a local portion spreads will be described in detail.

In FIGS. 3 and 4, when inserting the tube 4 into the tube joining member 7, the main body 1 is displaced by the force applied during the operation, the eccentricity of the tube 4 and the tube joining member 7 and the variation in the material hardness. In addition, when the frictional force between the tube joining member 7 and the hole of the main body 1 is large, the displacement is concentrated on the portion that spreads quickly, without performing the ideal spreading method. There is.

On the other hand, the ring-shaped projection 8 shown in FIG.
In the embodiment shown in FIG. 6, even if the portion spreads quickly and the displacement concentrates on the portion that spreads quickly when the frictional force between the tube connecting member 7 and the hole of the main body is large, the comb teeth Since the protrusions 11 and 12 can be displaced in the circumferential direction, it is possible to form a uniform pressure distribution in the circumferential direction.

As shown in FIG. 6, when the plurality of comb-shaped projections 11 and 12 are provided, the center of the tube joining member 7 is rotated in the rotational direction (the direction of arrows B and C in the figure).
It is preferable that the protrusions 11 and 12 are arranged so as to be shifted from each other so that the positions of the protrusions 11 and 12 do not overlap as much as possible.

The ring-shaped projection 8 shown in FIG. 5 and the comb-shaped projections 11 and 12 shown in FIG. 6 are formed according to the properties of the medium to be sealed and the material hardness of the tube joining member and the tube. Combinations can be used properly, but generally, as described above, when a material having a high friction coefficient between the tube joining member and the hole of the main body is used, a comb-shaped projection is effective.

(Embodiment 4) FIGS. 7 and 8 show a fourth embodiment of the present invention, which is a modification of the distal end portion of the projection 8 of the tube connecting member in FIGS. 3 and 4 utilizing the present invention. FIG. Also in the present embodiment, the main body 1 is made of a suitable hard material such as a hard plastic material, vinyl chloride, fluorine resin, metal, wood, etc., and the tube joining member is made of an elastic member such as silicon rubber or urethane rubber.

FIG. 7 is a cross-sectional view showing the distal end of the projection 14 of the tube connecting member in a state where the tube connecting member is not inserted into the hole of the main body. As shown, protrusion 14
7 have tapered surfaces shown in FIG. 7 toward the center in the thickness direction (the directions of arrows D and E in the figure).

FIG. 8 shows the tube connecting member 7 shown in FIG.
Is a sectional view showing a projection 14 'of the tube joining member 7 when the tube 4 is inserted into the hole 1a of the main body 1 and the tube 4 is inserted.

In this state, since the projection 14 'is pressed against the hole 1a of the main body 1, the arrow D side spreads in the arrow D direction from the center in the thickness direction of the arrows D and E in the figure,
On the other hand, the arrow E side extends in the arrow E direction.

As a result, the tapered surfaces 15, 1 in FIG.
6 shows the main body 1 after the tube assembly, as shown in FIG.
Can be kept in close contact with a wide surface of the hole 1a.

The converging portion 17 of the tapered surfaces 15 and 16 of the projection 14 is provided with a V-shaped cut or a U-shaped cut or an escape portion such as a groove as shown in FIG.
By providing these relief portions 17, the projecting tip portions 14 'of the tube joining members after the tube assembly shown in FIG.
Of the tapered surfaces 15 'and 16' can be further enhanced.

(Embodiment 5) FIG. 9 is a sectional view showing a fifth embodiment of the present invention. In this embodiment, the main body is made of a hard plastic material, vinyl chloride, fluororesin, metal, wood or the like. Made of hard material, the hole 18 in the body is
And a notch 20.

The detachable tube connecting member 21 is made of an elastic member such as silicone rubber or urethane rubber, and is fitted into the notch 20 and the positioning protrusion 22 which can be fitted in the groove 19 of the main body hole 18. And an abutment projection 23. The guide surface 24 of the tube joining member 21
It serves as a guide surface when the tube 4 is inserted into the tube joining member 21 from the direction of arrow G. Further, the contact surface 25 of the tube joining member 21 expands when the tube 4 is inserted, and the protrusion 22 on the outer peripheral portion is fitted into the groove 19 while expanding the protrusion 22 on the outer peripheral portion into the main body hole 18.

With the above configuration, after inserting the tube connecting member 21 into the hole 18 of the main body in the direction of arrow G and then inserting the tube 4 in the direction of arrow G, as shown in FIG. Tube joining member 21
And the liquid or gas is
Leakage from the storage room to the outside air can be prevented. All of these series of operations can be performed only from the direction of arrow G.
Can be fixed and sealed. Therefore, the present invention is particularly effective when assembling with an automatic machine.

(Embodiment 6) FIG. 11 is a sectional view showing a sixth embodiment of the present invention.

In the present embodiment, the main body is made of a suitable hard material such as a hard plastic material, vinyl chloride, fluororesin, metal, wood and the like. Further, the tube joining member 28 is made of an elastic member such as silicone rubber or urethane rubber, and has a tube fitting groove 29. The tube 30 has a fitting protrusion 31 having a diameter larger than the outer diameter of the tube. Here, when the tube 30 is inserted in the direction of the arrow H, the protrusion of the tube 30 is positioned in the fitting groove 29 of the tube joining member 28 as shown in FIG. That is, all of the series of operations can be performed only from the direction of arrow H, and the same operation enables fixing and sealing between the tube 30 and the tube joining member 28.

(Embodiment 7) FIG. 13 is a sectional view showing a seventh embodiment of the present invention. In this embodiment, the main body 1 is made of a hard plastic or the like, the tube joining member 32 is made of an elastic member such as silicon rubber or urethane rubber, and has a tube fitting groove 33 at a position different from the hole 1a of the main body 1. ing. Therefore, the projection 35 of the tube 34 is fixed to the tube joining member 32 at a position different from the hole 1a of the main body 1 as shown in FIG.

In FIG. 13, the projection 3 of the tube 34
11 can be inserted into the fitting groove 33 of the tube joining member 32 and the hole 1a of the main body 1 from the direction of the arrow F at a position not restricted by the outer diameter of the tube joining member 32, so that the sixth embodiment shown in FIG. Can be assembled with less force.

As in the sixth embodiment, a series of operations can be performed only from the direction of arrow I, and the tube joint member 32 can be fixed and sealed by the same operation.

(Embodiment 8) FIGS. 14 and 15 are sectional views showing an eighth embodiment of the present invention. In FIG.
In this embodiment, the main body is made of a hard plastic or the like, and the tube joining member 37 is made of an elastic member such as silicone rubber or urethane rubber, and the tube 4 is joined to the tube joining member 37. Body mating surface 3 of body hole 35
6 is formed as a curved surface as shown in FIG. On the other hand, the tube joining member 37 has an outer surface in contact with the hole 35 of the main body formed of a surface having a larger curvature than a curved surface of the inner surface of the hole 35 of the main body. Therefore, before the tube 4 is inserted, a gap 42 is formed between the tube joining member 37 and the hole 35 of the main body.

The inner surface 39 of the tube joining member 37 into which the tube 4 is inserted has a slightly smaller diameter than the tube 4.

FIG. 15 is a sectional view showing a state where the tube 4 is inserted into the hole 35 and the tube connecting member 37 of the main body shown in FIG. Inner surface 3 of tube joining member 37
9 'is pushed by the tube 4 and is displaced in a substantially linear form. The outer surface 38 'of the tube connecting member 37 is displaced while following the mating surface 36 of the hole 35 of the main body with the displacement of the inner surface 39'.

In the following, the present embodiment will be described in detail. In the second embodiment shown in FIGS. 3 and 4, a plurality of projections prevent the liquid or gas from leaking from the storage chamber to the outside air. When the tube is inserted, the outer diameter of the projection is expanded and pressed against the hole of the main body. Therefore, particularly when a material having high frictional resistance is used for the tube connecting member, the expansion of the outer diameter of the projection is hindered at the portion where the tube comes into contact with the hole early, and wrinkles and voids 43 in the tube insertion direction shown in FIG. May be. Such wrinkles and voids 43 in the tube insertion direction tend to have an adverse effect on preventing the liquid or gas from leaking from the storage chamber 40 to the outside air 41.

On the other hand, in the fitting of the curved surface shape shown in FIGS. 14 and 15, when the tube is inserted, the curved surface spreads in the tube insertion direction together with the outer diameter. Therefore, even if a material having high frictional resistance is used for the tube joining member, it is possible to suppress the generation of wrinkles or voids in a plane perpendicular to the tube insertion direction shown in FIG.

Wrinkles on a plane perpendicular to the tube insertion direction or
The gap hardly affects the prevention of leakage of the liquid or gas from the storage chamber 40 to the outside air. Therefore, in order to improve the close contact between the tube and the tube connecting member and the close contact between the tube connecting member and the main body hole, it is effective when a flexible tube connecting member, particularly a tube connecting member having a large frictional resistance is used.

As described above, the first to eighth embodiments have been described. In any case, the tube connecting member may be any material having flexibility. Further, the same effect can be exhibited even if the tube joining member is joined to the hole or separated. Further, it is effective means to use the methods described in the first to eighth embodiments in combination.

(Embodiment 9) FIG. 18 shows the present invention as applied to the supply of ink from an ink tank to an ink discharge head of an ink jet printer capable of printing characters and images by discharging ink. It is a perspective view for explanation at the time of using.

Printing unit 42 of ink jet printer
Is composed of an ink ejection head 43, an ink tank 44, and tubes 45, 46, 47, 48 for supplying ink from the ink tank 44 to the ink ejection head 43. The ink ejection head 43 is configured to be able to eject four colors of ink in the direction of arrow J in the figure from a plurality of minute holes (not shown). To supply ink,
On the surface 49 of the ink ejection head 43, holes 50, 51, 52, and 53 for supplying ink are provided.

In this embodiment, the supply hole 50 is for supplying black ink, the supply hole 51 is for yellow ink, the supply hole 52 is for magenta ink, and the supply hole 53 is for supplying cyan ink. The hole is set. The ink tank 44 has a black tank 5 corresponding to the four colors of ink used for printing.
4, a yellow ink tank 55, a magenta ink tank 56, and a cyan ink tank 57. Also,
Similar to the ink tank, the tubes are also used for the four colors used for printing, and the black tube 45 and the yellow tube 5 are used.
5. Magenta color tube 56, cyan color tube 5
The tube constituted by 7 is incorporated with the supply holes of the ink discharge head and the ink tank via the tube joining member 58 of the present invention.

As is apparent from FIG. 18, it is understood that the tubes are arranged close to each other, and in particular, in the ink discharge head 43, the pipes must be densely arranged.

[0069]

As described above, according to the first aspect of the present invention,
The described tube joining method is a tube joining method of attaching a tube to a hole of a main body to be attached via a tube joining member, wherein the tube insertion hole of the tube joining member is constituted by a hole having a diameter smaller than the tube outer diameter. Therefore, it is possible to assemble the tube, the tube joining member and the tube joining member and the hole with almost no gap only by inserting the tube into the hole of the main body, and further, as described above, the insertion of the tube becomes easy. Therefore, work efficiency is improved and work costs can be reduced, and assembling devices can be assembled with simple devices, so that equipment costs for the devices can be reduced, and the use of automatic assembly machines is easy. , And it is easy to cope with low cost and mass production.

In the tube joining method according to the second aspect of the present invention, since a cylindrical cut is formed in the outer diameter of the tube joining member in a direction perpendicular to the tube insertion direction, the allowable displacement of the tube joining portion is increased. It is possible to widen the dimensional tolerance of the tube and the tube joining member and the body hole,
There is an effect of facilitating the processing of the component, and by facilitating the processing of the component in this manner, the quality control of the component is also facilitated, and in addition, the cost of the component is reduced.

In the tube joining method according to the third aspect of the present invention, since a plurality of cylindrical cuts formed perpendicular to the tube insertion direction are provided, the liquid is cut on a plurality of surfaces perpendicular to the tube insertion direction. It is possible to prevent gas and gas from leaking from the storage room to the outside air in a plurality of stages, thereby making it possible to reliably prevent leakage.

According to a fourth aspect of the present invention, in the tube joining method, at least one of the cylindrical projections formed by the cylindrical cuts formed perpendicular to the tube inserting direction of the tube joining member is moved in the tube inserting direction. Since the tube is divided, even on a tube joining member having a large frictional resistance, the pressing force on the circumference can be made uniform in the circumferential direction, thereby making it possible to reliably prevent leakage.

In the tube joining method according to a fifth aspect of the present invention, the outer end of the cylindrical projection formed by a cylindrical cut formed perpendicular to the tube insertion direction of the tube joining member is formed on a concave surface. Therefore, the contact area of the tube joining member with the main body hole can be increased, and furthermore, the liquid or gas can be reliably prevented from leaking from the storage chamber to the outside air.

According to a sixth aspect of the present invention, there is provided a tube joining method according to the first aspect of the present invention, wherein an outer diameter of a cylindrical projection formed by a cylindrical cut formed perpendicular to the tube inserting direction of the tube joining member is substantially at the center in the tube inserting direction. Since the groove is formed in the tube, by preventing the protrusion of the tube joining member from swelling at the center after the tube is inserted, thereby preventing the occurrence of a gap,
Liquids and gases can be more reliably prevented from leaking from the storage room to the outside air.

According to the tube joining method of the present invention, a projection is provided on the outer periphery of the tube joining member, and the projection of the tube joining member is fitted into a part of a hole of the main body into which the tube joining member is inserted. Because it has a groove that fits
By inserting the tube joining member into the above-mentioned groove using the expansion displacement of the outer diameter of the tube joining member at the time of inserting the tube, the tube joining member can be fixed to the hole of the main body only by inserting the tube. .

According to the tube joining method of the present invention, a projection having a diameter larger than the outer diameter is provided on the outer periphery of the tube, and a groove for fitting with the projection of the tube is provided on a part of the inner diameter of the tube joining member. Since, only by inserting the tube, the tube to the tube joining member,
It becomes possible to fix.

According to the tube joining method of the ninth aspect of the present invention, in an apparatus for assembling a tube to a hole of a mounting body via a tube connecting member, the mounting hole is formed in a curved surface in the tube insertion direction. In addition, the tube joining member surface that is in contact with the mounting main body hole is constituted by a curved surface having a slightly larger curvature than the curved surface of the mounting main body hole, and the tube joining member has a hole having a diameter slightly smaller than the outer diameter of the tube. Therefore, a gap in the tube insertion direction between the main body hole and the tube joining member is prevented, so that the liquid or gas can be more reliably prevented from leaking from the storage chamber to the outside air.

In the tube joining method according to the tenth aspect of the present invention, since the ink is used to connect the ink tank and the ink discharge head of the ink jet printer capable of printing characters or images by discharging the ink, the ink is discharged. By doing so, it can be used to connect the ink tank and the ink ejection head of an ink jet printer capable of printing characters or images. In addition, since the ink tank and the ink discharge head can be connected only by inserting the tubes, a plurality of tubes can be arranged at a narrow interval, and assembly by a simple operation is possible. In addition, it is possible to assemble with an automatic machine having a simple mechanism, and it is possible to reduce the assembly cost in combination with the quick working time.

Further, by combining and using the above embodiment, the mounting hole of the main body and the tube connecting member and the tube connecting member and the tube can be fixed only by inserting the tube, and at the same time, the liquid or gas is stored. Leakage from the room to the outside air can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a tube joining method according to the present invention.

FIG. 2 is a cross-sectional view showing a state where a tube is inserted in the first embodiment of the present invention.

FIG. 3 is a sectional view showing a second embodiment of the tube joining method according to the present invention.

FIG. 4 is a sectional view showing a state where a tube is inserted in the second embodiment of the present invention.

FIG. 5 is a perspective view showing a tube joining member in a second embodiment of the tube joining method according to the present invention.

FIG. 6 is a perspective view showing a third embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a distal end portion of a tube joining member, showing a fourth embodiment of the tube joining method according to the present invention.

FIG. 8 is a sectional view showing a state where a tube is inserted in a fourth embodiment of the present invention.

FIG. 9 is a sectional view showing a fifth embodiment of the tube joining method according to the present invention.

FIG. 10 is a sectional view showing a state where a tube is inserted in a fifth embodiment of the present invention.

FIG. 11 is a sectional view showing a sixth embodiment of the tube joining method according to the present invention.

FIG. 12 is a sectional view showing a state where a tube is inserted in a sixth embodiment of the present invention.

FIG. 13 is a sectional view showing a seventh embodiment of the tube joining method according to the present invention.

FIG. 14 is a sectional view showing an eighth embodiment of the present invention.

FIG. 15 is a sectional view showing an eighth embodiment of the present invention.

FIG. 16 is a perspective view showing an eighth embodiment of the present invention.

FIG. 17 is a perspective view showing an eighth embodiment of the present invention.

FIG. 18 is an explanatory diagram when the present invention is used in an ink jet printer.

FIG. 19 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 1a hole 2 Tube joining member 4 Tube 7 Tube joining member 8 Projection 10 Comb tooth projection 11 Comb tooth projection 15 Projection tip part 16 Projection tip part 19 Groove 22 Projection 100 Body 101 Hole 102 Tube 103 Sealing material 104 Storage room 105 Open air

Claims (10)

[Claims] In a tube joining method for attaching a tube to a hole of a main body to be attached via a tube joining member, a tube insertion hole of the tube joining member is constituted by a hole having a diameter smaller than the outer diameter of the tube. And the tube joining method. 2. The tube joining method according to claim 1, wherein a cylindrical cut is formed in the outer diameter of the tube joining member in a direction perpendicular to the tube insertion direction. 3. The tube joining method according to claim 1, wherein a plurality of cylindrical cuts formed perpendicular to the tube insertion direction are provided. 4. The tube joining member according to claim 3, wherein at least one of the cylindrical projections formed by the cylindrical cut formed perpendicular to the tube insertion direction of the tube joining member is divided in the tube insertion direction. Tube joining method. 5. The method according to claim 1, wherein an outer diameter tip of a cylindrical projection formed by a cylindrical cut formed perpendicular to a tube insertion direction of the tube connecting member is formed on a concave surface. 2. The tube joining method according to claim 1. 6. A groove is formed at a substantially central portion of the outer diameter tip of a cylindrical projection formed by a cylindrical cut formed perpendicular to the tube insertion direction of the tube connecting member in the tube insertion direction. Item 6. The tube joining method according to Item 5. 7. A projection is provided on the outer periphery of the tube joining member, and a part of the hole of the main body into which the tube joining member is inserted has a groove to be fitted with the projection of the tube joining member. Item 7. The tube joining method according to Item 6. 8. A projection having a diameter larger than the outer diameter is provided on the outer periphery of the tube, and a part of the inner diameter of the tube joining member is provided on the tube.
The tube joining method according to claim 7, further comprising a groove that fits with the protrusion of the tube. 9. An apparatus for assembling and using a tube via a tube joining member in a hole of a mounting body,
The mounting hole is formed in a curved surface with respect to the tube insertion direction, and the tube joining member surface in contact with the mounting main body hole is formed by a curved surface having a slightly larger curvature than the curved surface of the mounting main body hole. The method according to claim 1, wherein the tube has a hole having a diameter slightly smaller than an outer diameter. 10. A tube joining method used for connecting an ink tank and an ink discharge head of an ink jet printer capable of printing characters or images by discharging ink.