JP2013164109A - Delivery vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem wherein a worker must be careful by always paying attention for preventing a twist phenomenon caused in an O ring when installing an ink bottle, by fearing the occurrence of a problem wherein sealing is insufficient since resiliency (bearing pressure) of the O ring is not proper, in concrete, force in the diametrically contractive direction is not uniformly applied to the axial direction of the O ring.SOLUTION: A shaft connecting structure for installing a second shaft on a first shaft and arranging an annular elastic member between the first shaft and second shaft, is a shaft connecting structure for forming a first recessed part in a part for arranging the annular elastic member and forming a second recessed part having a width smaller than an external shape of the annular elastic member, in a bottom part of the first recessed part.

Description

  The present invention relates to a shaft connecting structure in which a second shaft is mounted on a first shaft and an annular elastic member is disposed between the first shaft and the second shaft.

  An ink bottle mounting device is an example of a container in which an elastic ring is disposed and a liquid is sucked and discharged. In a printing apparatus such as a stencil printing apparatus, an ink bottle mounting apparatus for mounting a replaceable ink bottle is provided, and ink is sucked from the ink bottle.

  One example is the mounting device and the ink bottle mounting device described in Utility Model Registration No. 3130270. The following is described. A first member, a second member connectable to the first member, a ring receiving groove formed in one of the first member and the second member, and an elastic ring disposed in the ring receiving groove And an ink bottle mounting apparatus that deforms the elastic ring by connecting the first member and the second member to mount one of the first member and the second member to the other.

Utility Model Registration No. 3130270

In the prior art, when the ink suction port portion as the first member constituting the mounting device and the ink supply port portion as the second member constituting the mounting device are mounted, the elastic ring keeps the airtightness, and the elasticity is applied. The ring is gradually deformed while moving to the second groove, so that the mounting resistance is reduced, thereby improving the mounting property.
However, the direction in which the O-ring, which is an elastic ring, is deformed is the circumference with respect to the axis of the O-ring, that is, the diameter of the O-ring is reduced so as to be sealed, and further, The direction, that is, the pulling force for reducing the mounting resistance is generated at the same time. Furthermore, to explain, a twisting force is always applied to the O-ring by mounting. As a result, the durability of the O-ring was lowered, and the ability with respect to the sealing performance was not sufficiently exhibited. That is, the repulsive force (surface pressure) of the O-ring is not appropriate, and specifically, the force in the reduced diameter direction is not uniformly applied to the axial direction of the O-ring, so that the sealing is insufficient.
Fearing the occurrence of these problems, workers must always be careful and careful when installing ink bottles to prevent the twisting phenomenon that occurs in the O-ring.
Further, when the prior art is used as an ink filling device for a writing instrument, ink is mainly filled in an ink containing portion such as a ballpoint pen or a marking pen for which about 10 to 100 samples are made as samples. In such a case, an O-ring is attached to the piston, and sliding is repeated back and forth with respect to the axial direction of the piston, the sliding resistance is relaxed, and the operability is improved. However, as described above, the O-ring is always subjected to a pulling force or twisting force and is repeatedly slid back and forth. As described above, the O-ring is cracked when it is pulled or twisted. In some cases, the durability becomes extremely low, the ink easily leaks, and a certain amount of ink cannot be sucked or injected.

  The present invention has been made in view of the above problems, and is a shaft in which a second shaft is mounted on a first shaft, and an annular elastic member is disposed between the first shaft and the second shaft. A connection structure, wherein a first recess is formed at a portion where the annular elastic member is disposed, and a second recess having a width smaller than the outer shape of the annular elastic member is formed at the bottom of the first recess. The first gist of the present invention is a shaft coupling structure in which a second shaft is mounted on a first shaft, and an annular elastic member is disposed between the first shaft and the second shaft. The second gist is that the shaft portion on which the elastic member is disposed can be elastically deformed.

  The present invention is a shaft connection structure in which a second shaft is mounted on a first shaft and an annular elastic member is disposed between the first shaft and the second shaft, and the annular elastic member is disposed. The first recess is formed at a portion to be formed, and the second recess having a width smaller than the outer shape of the annular elastic member is formed at the bottom of the first recess. A shaft connecting structure in which a second shaft is mounted and an annular elastic member is disposed between the first shaft and the second shaft, and the portion of the shaft where the annular elastic member is disposed is elastically deformed. Since the second gist was made possible, the repulsive force (surface pressure) of the O-ring became appropriate, so it was possible to cope with fluctuations in the inner diameter of the syringe, and it was possible to seal it reliably. Furthermore, the sliding resistance of the piston is eased, and a certain amount of liquid can be discharged accurately and easily. Door can be.

It is a perspective view of the whole product before suction of Example 1 and at the time of completion of discharge. It is a vertical cut side view of FIG. 1 is an exploded perspective view of Example 1. FIG. It is a perspective view of the whole product at the time of completion of suction of Example 1. FIG. 5 is a longitudinally cut side view of FIG. 4. 2 is an enlarged cross-sectional view of an O-ring before suction and when discharge is completed in Example 1. FIG. 2 is an enlarged cross section of an O-ring at the completion of suction in Example 1. FIG. It is a vertical cut side view of Example 2. It is a vertical cut side view of Example 3. It is an expanded section of the O-ring before the piston of Example 3 bends. It is an expanded section of the O-ring after the piston of Example 3 bends.

The operation will be described. A suction and discharge container in which a piston and an elastic ring are slidably disposed inside a syringe, wherein a first groove is formed on a circumference in a longitudinal direction of either the syringe or the piston, and the first groove Since an elastic ring is fitted into the first groove portion, and a second groove portion is provided on the inner diameter or outer diameter side of the circumference of the first groove portion, when the diameter reducing action acts on the O-ring, The movement in the direction is prevented, and the inner surface portion of the O-ring subjected to the compression action is deformed toward the second groove portion. As a result, the repulsive force (surface pressure) of the O-ring can be properly maintained, and the fluctuation of the inner diameter of the syringe can be dealt with, and the O-ring can be sealed. Furthermore, the sliding resistance of the piston is reduced, and a certain amount of liquid can be discharged accurately and easily.
In other words, the operator does not need to accurately adjust the piston to the scale of the amount of liquid required for discharge on the outer peripheral surface of the syringe while paying attention to fluctuations in the sliding resistance of the piston in order to achieve the required discharge amount. You don't have to worry about visual recognition and always pay attention to the situation, so you can focus your attention on the work.

An example of an embodiment of the present invention will be described with reference to FIGS. This is an example adapted for an ink filling device of a writing instrument such as a ballpoint pen, a direct liquid type, or a batting type marking pen. The syringe 1 according to the first embodiment includes an injection needle set 2, a syringe 3, and a piston set 4. The injection needle set 2 is press-fitted detachably forward with respect to the axial direction of the syringe 3. In the injection needle set 2, the needle 5 is press-fitted and fixed to the needle base 6, and the inner diameter 6a of the needle base 6 and the distal end portion 3a of the syringe 3 are press-fitted and fitted, so that the ink other than the tip of the injection needle Is not leaking from. As for the material, the needle 5 is stainless steel and the needle base 6 is PP (polypropylene).
A piston set 4 is arranged on the inner diameter portion 3 b of the syringe 3 so as to be slidable back and forth with respect to the axial direction of the syringe 3. The piston set 4 includes a piston 7 and an O-ring 8 disposed on the outer periphery in front of the piston 7. The outer peripheral surface 8 a of the O-ring 8 is press-fitted so as to be slidable with respect to the inner diameter portion 3 b of the syringe 3. That is, since the material of the O-ring 8 is made of butyl rubber which is a soft member, it can be compressed and deformed, so that ink does not leak from the piston 7. Further, silicon is applied to the outer peripheral surface 10 a of the O-ring 8 in order to improve the slidability with the inner diameter portion 3 b of the syringe 3. The material of the syringe 3 is PP (polypropylene).
Next, the configuration of the piston set 4 will be described. The O-ring 8 is press-fitted and fixed in the first groove portion 7a on the outer periphery in front of the piston 7 so as to be compressible and deformable. Furthermore, a second groove portion 7c is formed on the inner diameter side 7b of the first groove portion 7a with respect to the circumference of the piston 7 in the axial direction. When the inner diameter portion 3b of the syringe 3 is reduced in diameter, the O-ring 8 cannot be compressed and deformed by the first groove portion, and a part of the O-ring 8 can be fitted into the second groove portion 7c. The repulsive force (surface pressure) of the O-ring 8 is made appropriate.
Here, a sealing principle of an O-ring in which an O-ring is often used to prevent fluid (gas, liquid, viscous body, etc.) from leaking will be described. The sealing principle of the O-ring is that the compressed O-ring is sealed by maintaining a repulsive force. That is, the O-ring is mounted in the groove, the O-ring is compressed (a crushing margin is ensured), a repulsive force (surface pressure) is generated by the restoring force of the rubber, and the fluid is sealed.
However, when sliding the piston with the O-ring compressed and press-fitted and fixed to the inner diameter of the shaft cylinder, the dimensional change of the inner diameter of the metal shaft cylinder is small, so the repulsive force of the O-ring is properly maintained and sealed. However, since the die taper is provided on the mold structure in this embodiment, the piston is advanced, and the O-ring is simultaneously moved in the direction of reducing the inner diameter of the syringe. , And the repulsive force (surface pressure) due to the restoring force of the rubber also increases. That is, the sliding resistance of the piston also increases.
Therefore, in the present embodiment, the above configuration is formed. That is, the gist of the present invention is a shaft coupling structure in which a second shaft is mounted on a first shaft and an annular elastic member is disposed between the first shaft and the second shaft, and the annular elastic member The first gist is that the first concave portion is formed at a portion where the first concave portion is disposed, and the second concave portion having a width smaller than the outer shape of the annular elastic member is formed at the bottom of the first concave portion. A shaft connecting structure in which a second shaft is mounted on the shaft and an annular elastic member is disposed between the first shaft and the second shaft, and a portion of the shaft on which the annular elastic member is disposed The second gist is that the elastic deformation is possible.

The operation method will be described. There are suction and discharge operations. The state before sucking ink contained in a container such as a beaker before use is such that the front end surface 7d of the piston 7 is in contact with the inclined surface 3c of the syringe 3 as shown in FIG. That is, the piston set 4 is at the frontmost position. At this time, as shown in FIG. 6, the O-ring 8 is reduced in diameter because the inner diameter portion of the syringe 3 is tapered, so that the O-ring 8 cannot be compressed and deformed by the first groove portion, and the O-ring 8 A part of the ring 8 can be fitted into the second groove. That is, since the O-ring 8 does not generate a twisting force as in the prior art, the repulsive force (surface pressure) is properly maintained.
Next, when the piston set 4 is pulled backward to suck ink from the container, the piston 7 and the O-ring 8 compressed and press-fitted to the piston 7 are moved backward as shown in FIG. The piston 7 step portion 7 e comes into contact with the locking portion 3 d of the syringe 3. That is, the piston set 4 is at the end position. At this time, as shown in FIG. 7, the O-ring 8 is expanded in diameter because the inner diameter portion 3b of the syringe 3 has a pull-out taper, so that the O-ring 8 is compressed and deformed by the first groove portion 7a. As a result, a part of the O-ring 8 has come out of the second groove 7c. Since the O-ring 8 only varies in the radial direction, no twisting force is generated as in the prior art, and the repulsive force (surface pressure) is appropriate as in FIG. Is maintained.
Further, when the piston set 4 is pulled backward strongly, the stepped portion 7e gets over the locking portion 3d, and the piston set 4 comes off, allowing disassembly and cleaning.

In the previous example, the injection needle set 2 is fixed by press-fitting, and the tip of the syringe 3 is tapered, but it can also be a luer (insertion type) or a lock (screw screwing) like a general syringe. It can be selected appropriately. Also. The syringe 3 may be a resin material such as PP (polypropylene), PE (polyethylene), or PET (polyethylene terephthalate), or may be a hard material made of stainless steel or glass.
Furthermore, the inner diameter portion 3b of the syringe 3 is tapered in the previous example, but is not limited to this, and may be straight, stepped, corrugated, etc. A plurality of parts may be combined such as two or three stages, and the shape of the inner diameter 3b of the syringe 3 can be selected as appropriate.
In the previous example, the groove width of the second groove portion 7c is 10 to 60% of the diameter of the O-ring 8, and the groove depth is 10 to 50%. The depth can be selected as appropriate. Furthermore, the shape of the second groove portion 7c is semicircular, but is not limited to this, and may be, for example, a square, a rectangle, an ellipse, a gourd shape, and the shape of the second groove portion 7c is It can be selected as appropriate.
Furthermore, in the previous example, the syringe 3 and the needle base 6 are formed of a transparent resin, and the piston 7 and the O-ring 8 are formed of a colored opaque resin. Or may be semi-transparent resins, and may be appropriately selected such as a combination thereof.
Furthermore, in the previous example, PP (polypropylene) resin is used for the material of the syringe 3, the needle base 6, and the piston 7, but PE (polyethylene) or the like may be used. The O-ring 8 uses butyl rubber, but is not limited to transparent and opaque resin, but may be butadiene rubber, silicon rubber, or elastomer resin, and the material can be appropriately selected depending on the use situation.
In the previous example, the O-ring 8 is an O-ring having an O-shaped cross-section that is inexpensive and easy to obtain, but is not limited to this, and the cross-sectional shape is □ -shaped, D-shaped, X-shaped, etc. It is also possible to combine them, and the shape of the O-ring 8 can be selected as appropriate.

  In Example 1, although it is used as an ink filling device for writing instruments such as a ballpoint pen and a marking pen, it is a container that can perform a fixed amount of suction and discharge, so if you remove the injection needle, it can be used as a medicine for infants or cosmetic aroma oil It can be used for sucking and discharging, and refilling a perfume into a small bottle or preparing (blending) for itself, or feeding to a small animal, drinking water, or a medical syringe.

In the second embodiment of FIG. 8, a fixed quantity discharge container such as a marking pen or a cosmetic is used. However, when the knock 9 is pressed, the slider 11 contained in the shaft cylinder 10 and in contact with the front moves forward. The rotor 13 that is in contact with the front of the slider 11 and is urged rearward by the front spring 12 rotates while moving forward, and at the same time, the rotor 13 is prevented from rotating together with the rotor 13. The screw rod 14 with the existing screw also rotates. Further, the screw rod 14 is forwardly moved by the pitch rotation of the screw by a nut 15 screwed to the screw rod 14 and fixed to the inner diameter portion 10a of the shaft tube 10 so as not to move back and forth and to rotate. To do. At the same time, the outer peripheral surface 17a of the piston 16 that is detachably fixed to the front end of the screw rod 14 and the O-ring 17 that is press-fitted and fixed to the first groove 16a of the piston 16 so as to be compressed and deformed are also provided. It advances while being slidably press-fitted with the inner diameter portion 10a. As in the present embodiment, the screw rod 14 and the piston 16 are detachably fixed so that the screw rod 14 is threaded from the rear to the front along the screw groove. That is, after moving forward by rotating about 4 to 5 mm, the piston 16 and the O-ring 17 can be fixed. By the way, when the screw rod 14 and the piston 16 are integrated, the screw rod 14 is moved backward from the front along the screw groove by the distance that the screw rod 14 is threaded, that is, by rotating about 25 to 50 mm. Therefore, assembling time for rotating the difference by 20 to 45 mm is required. On the other hand, in this embodiment, it is possible to reduce the assembly time by rotating the difference by about 20 to 45 mm.
Further, the inner diameter portion 10a has a drawing taper and a stepped portion 10b. When the piston 16 moves forward by the pressing operation of the knock 9, the inner diameter portion 10a is gradually reduced in diameter. Since the second groove portion 16c is formed on the inner diameter side 16b of the first groove portion 16a with respect to the circumference in the axial direction of the piston 16, even when the inner diameter portion 10a of the shaft cylinder 10 is reduced in diameter. The O-ring 17 cannot be completely compressed and deformed in the first groove portion, and a part of the O-ring 17 can be fitted into the second groove portion 16c. The repulsive force (surface pressure) of the O-ring 17 Therefore, the sliding resistance of the piston 16 is alleviated.

  9 has a mechanism in which the piston advances by the same knocking operation as that of the above-described second embodiment. A packing 18 is used instead of the O-ring. In front of the piston 19, a slit groove 19a is formed at a facing position. On the other hand, a tapered inner diameter portion 20 and a step portion 20a are formed on the inner surface of the syringe. That is, when the piston 19 moves forward, the packing 18 enclosed in the piston 19 tends to reduce the diameter by the inner diameter portion 20 and the step portion 20a having a draft taper. Due to this diameter reducing action, the slit groove 19a is bent in the inner diameter direction, and the packing 18 is reduced in diameter by this bending. As a result, the packing 18 can cope with fluctuations in the inner diameter of the syringe, and the repulsive force (surface pressure) becomes appropriate and can be sealed.

DESCRIPTION OF SYMBOLS 1 Syringe 2 Injection needle set 3 Syringe 3a Tip part 3b Inner diameter part 3c Slope 3d Locking part 4 Piston set 5 Needle 6 Needle base 6a Inner diameter 7 Piston 7a 1st groove part 7b Inner diameter side 7c 2nd groove part 7d Front end surface 7e Step part 8 O ring 8a outer peripheral surface 9 knock 10 shaft cylinder 10a inner diameter portion 10b stepped portion 11 slider 12 spring 13 rotor 14 screw rod 15 nut 16 piston 16a first groove portion 16b inner diameter side 16c second groove portion 17 O ring 17a outer peripheral surface 18 Packing 19 Piston 19a Slit groove 20 Inner diameter 20a Step

Claims (4)

A shaft connecting structure in which a second shaft is mounted on the first shaft and an annular elastic member is disposed between the first shaft and the second shaft, and the portion where the annular elastic member is disposed A shaft coupling structure in which a first recess is formed and a second recess having a width smaller than the outer shape of the annular elastic member is formed at the bottom of the first recess. A shaft connecting structure in which a second shaft is mounted on the first shaft and an annular elastic member is disposed between the first shaft and the second shaft, and the shaft on which the annular elastic member is disposed. A shaft connection structure that enables elastic deformation of the part. The suction and discharge container according to claim 1, wherein a taper portion or a step portion is provided inside the first shaft. The suction and discharge container according to claim 1, wherein the first recess formed on the second shaft or the second recess is detachably disposed.

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