JPS59204564A - Ink jet recording apparatus - Google Patents

Abstract

PURPOSE:To prevent a hollow needle from contacting with the hand of a worker, by covering the hollow needle with a protective member so as to prevent a fingertip from touching said needle. CONSTITUTION:A vertical slit and a V-shaped position determining member crossing said slit at right angles are formed in the vicinity of the trailing end part of a fixing member 16 toward a front and back direction to inlay a hollow needle 15. On the other hand, a guard plate 24 is formed into a rectangular shape from a metal plate and a bent part 24a inlaid with the aforementioned slit is formed to the trailing end part thereof. The lower end of the bent part 24a in a fixed state presses the hollow needle 15 and functions as the fixing means of the hollow needle 15. In addition, the leading end of the guard plate 24 is protruded forwardly only over a definite distance (l) from the leading end of the hollow needle 15 and consideration is taken so as to prevent said hollow needle from touching the hand and finger of a worker. By this constitution, the hollow needle 15 is covered with the guard plate 24 and prevented from touching the hand and finger of the worker.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an inkjet recording device, and more particularly to an inkjet recording device having a structure that prevents damage to fingertips and the like caused by hollow needles.

Conventional inkjet recording apparatuses have excellent features such as high speed, quietness, printing on plain paper, and the ability to easily print in color.

On the other hand, since liquid is used as a recording medium, if the ink is not handled properly, the ink can contaminate the inside and outside of the apparatus, including the operator.

Therefore, in order to prevent such drawbacks, an ink bag made of a flexible material that responds to atmospheric pressure is used as an ink storage container, and this ink bag is housed in a rigid container. The one that is easy to handle is adopted.

Such an ink bag is partially provided with a seal made of an elastic material that can be penetrated by a needle, etc., a hollow needle is provided in the ink supply section of the device, and the hollow needle is inserted into the seal made of the elastic material. The ink supply path from the ink bag is formed by passing through the ink bag.

A conventional example of such a structure is shown in FIG.

In FIG. 1, the reference numeral 1 indicates an inkjet nozzle, which is made of glass or the like.

A piezo element 2 is wound around the outer peripheral surface of the tip of the inkjet nozzle I, and by applying a pulse signal that is a printing command to this element, the piezo element 2 is bent and vibrated, and the inkjet nozzle I Printing is performed by causing a change in volume and ejecting ink droplets from the tip of the inkjet nozzle 1 toward the recording paper 3.

A platen 4, which also serves as a paper feed roller, is disposed facing the inkjet nozzle 1, and the recording paper 3 is guided between the platen 4 and pinch rollers 5 and 6.

On the other hand, the inkjet nozzle I is provided on a support member 7, and the support member 7 is fixed on a carriage 8. This carriage 8 moves along a guide bar 9.9 in the main scanning direction.

On the other hand, what is indicated by the symbol IO is an ink bag, and the inside thereof is filled with ink 11.

The ink bag 10 is formed into a bag shape by using a single sheet or a composite sheet of polyethylene, vinylidene chloride, aluminum foil, or the like.

One end of a tube 12 is fixed to the distal end of the ink bag 10, and the other end of the tube 12 is fitted and fixed to a sealing part 13 made of an elastic member.

The sealing part 13 is made of silicone rubber, butyl rubber, etc. with chemical resistance Q.
The ink outlet hole 1 formed in the sealing part 13 is made of a highly flexible material.
4 is always in a closed state to prevent the ink II from flowing out from the ink bag IO.

On the other hand, the reference numeral 15 is a hollow needle, and one end thereof is fixed to a fixing member 16, and the fixing member 16 is fixed to the top of the bottom plate 17.

One end of the hollow needle 15 and the inkjet nozzle l are connected by a flexible tube 18.

By the way, the ink bag 10 is housed in a case 19, and the sealing part 13 is fixed to the tip of the case I9. By the way, the cover 2 of the inkjet recording device
A lid 21 that can be opened and closed is rotatably attached to the front side of the 0 via a shaft 22.

Also, the reference numeral 2']a denotes a partition plate that regulates the upper side of the accommodation space of the case 19 provided inside the device housing.

By the way, when the above structure is adopted, the hollow needle 15 ends up protruding outward as shown in FIG. 2 when the cover 20 is removed in the assembly step (4).

Therefore, during assembly or adjustment work, the operator's hands, fingers, etc. can easily come into contact with the hollow needle 15, resulting in damage to the hands, fingers, etc.

OBJECTS The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional inkjet recording apparatus, and an object of the present invention is to provide an inkjet recording apparatus configured such that the hollow needle does not come into contact with the operator's hands.

Examples Hereinafter, details of the present invention will be explained based on the examples shown in the drawings.
Explain ゛.

FIRST EMBODIMENT FIGS. 3 to 5 illustrate the first embodiment of the present invention. In the following embodiments, the same parts as in FIGS. 1 and 2 are designated by the same reference numerals. , the explanation thereof will be omitted.

In this embodiment, a vertical notch 16b is formed near the rear end of the fixing member 16, and a 7-shaped positioning groove 16a is formed in the front-back direction perpendicular to this notch 16b. The hollow needle 15 is fitted into this groove 16a.

Further, the fixing member I6 has a screw hole 16c across the groove 16a.
is formed.

On the other hand, what is indicated by the reference numeral 24 is a guard plate, which is formed from a metal plate or the like in a quadrilateral shape, and has the notch 16b at its rear end.
A bent portion 24a is formed to fit inside the tapped hole 1.
Through holes 24b are formed at positions corresponding to 6c and 16c.

The fixed part 16 is fixed to the bottom plate 17 with screws 15,
The guard plate 24 is fixed to the fixed part 16 by screws 26.

When the guard plate 24 is fixed, the lower end of the bent portion 24a holds the hollow needle 15 in the groove 16a (as shown in FIG. 4), and serves as a means for fixing the hollow needle 15.

Further, the tip of the guard plate 24 protrudes a certain distance forward from the tip of the hollow floor 15, and is designed to avoid contact with the hands and fingers of the worker.

Since this embodiment is configured as described above, the hollow needle 1
5 is covered with a guard plate 24 and does not come into contact with the operator's hands and fingers.

By the way, specifically, if the four parts 19a into which the guard plate 24 fits are formed above the tip of the case 19 that accommodates the ink bag, then when the case I9 is inserted along the guide plate 27, Since the guard plate 24 is fitted into the four parts 19a, the distance H between the guard plate 24 and the bottom plate 17 can be reduced, and furthermore, fingers and the like can fit therein.

Second Embodiment FIG. 6 explains a second embodiment of the present invention. It is in a state opposite to the corner of the tip of the case 19.

The guard plate 24 has a side plate 24c bent so as to have an L-shaped cross section.

(7) On the other hand, on the case 19 side, a four part 19a into which the guard plate 24 fits is formed at the corner of the tip, and the guard plate 24 fits into this part, and the side surface 19b guides the inside of the side plate 24c. be done.

Even if such a structure is adopted, in addition to having the same effect as the above-mentioned embodiment, the guard plate 24 is bent in an L-shape, so the strength is increased and the wall thickness can be reduced. .

Third Embodiment FIG. 7 explains a third embodiment of the present invention. In this embodiment, both sides of the guard plate 24 (this side plate 24c,
24d, and the cross section is formed into a U-shape.

On the other hand, a rectangular cylindrical protrusion 19c is formed at the distal end of the case 19 and is fitted into the U-shaped guard plate 24.

Therefore, when the case 19 is attached, the protrusion 19c will be fitted into the guard plate 24.

When such a structure is adopted, since the hollow needle 15 is surrounded by the U-shaped guard plate 24 and the bottom plate 17 (8), the operator's fingertips are completely isolated and will not be injured.

Fourth Embodiment FIG. 8 explains a fourth embodiment of the present invention. In this embodiment, a cylindrical body 28 is provided integrally with the fixing member 16,
A hollow needle I5 is housed in this. Hollow needle 15 is fixed by screw 29.

A body 30 is provided integrally with the case 19.

If such a structure is adopted, the hollow needle 15 is completely covered by the cylindrical body 28, and the fingertips etc. will not be damaged.

Effects As is clear from the above explanation, according to the present invention, a structure is adopted in which the hollow needle is covered with a protective member to prevent fingertips from coming into contact with it. Also, it is possible to prevent accidents in which fingertips are damaged by the hollow needle when the user of the device carelessly inserts his or her hand inside the device.

[Brief explanation of drawings]

1 and 2 are longitudinal sectional side views of a conventional structure with and without a cover attached, respectively, and FIGS. 3 to 5 are illustrative of a first embodiment of the present invention. 3 is an exploded perspective view, FIG. 4 is a vertical side view, FIG. 5 is a perspective view showing the relationship with the case, FIG. 6 is a perspective view explaining the second embodiment of the present invention, and FIG. FIG. 8 is a perspective view illustrating a third embodiment of the present invention, and FIG. 8 is a longitudinal side view illustrating a fourth embodiment of the present invention. I... Inkjet nozzle 8... Carriage 10... Ink bag 13.
...Sealing part 15...Hollow needle 16...Fixing member 24...Guard plate (11) Figure 1 Figure 2 15 16 17 Dimensions ('%J Figure 5 Figure 6 Figure 7 Figure 8

Claims (4)

[Claims] (1) In an inkjet recording device equipped with a case or the like containing an ink bag having a hollow needle connected to the inkjet nozzle side and a sealing portion made of an elastic member into which the hollow needle is inserted, the hollow An inkjet recording device characterized in that a needle is covered with a protective member to prevent fingertips from touching it. − (2) The protective member is a guard plate located above the hollow needle and protruding a predetermined distance longer than the hollow needle. The inkjet recording apparatus according to claim 1, wherein the inkjet recording apparatus is configured to be fitted. (3) The guard plate has an L-shaped cross section and is arranged in a position where it can fit into four parts formed at the corners of the case. inkjet recording device. (4) The protective member is provided so as to surround the hollow needle, and the case side guard is provided with a fitting part that can be fitted with this protective member,
2. The inkjet recording apparatus according to claim 1, further comprising a sealing portion made of an elastic member in the fitting portion.