JP2012055873A - Auxiliary tool for filtration operation using syringe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a syringe on whose front end a filter is mounted from being detached from the filter when liquid filtration is carried out by using the syringe.SOLUTION: An auxiliary tool 10 for filtration operation using a syringe is used when foreign substances are filtered out from a liquid by using a syringe 21 on whose front end at least one filter is mounted. The tool 10 concerned includes; a supporting member 11; and an upper side-regulating member 12 and a lower side-regulating member 13 which are each provided in the supporting member 11. The upper side-regulating member 12 engages with the upper face of the flange 21a of the syringe 21, on which filters 22, 23 are mounted, to regulate the movement of the flange and has an accommodation groove 12a in which part of a plunger 24 inserted in the syringe 21 is accommodated. The lower side-regulating member 13 engages with the lower face of the filter 22 mounted on the syringe 21 to regulate the movement of the filter and has an accommodation groove 13a in which part of the outlet nozzle 22a of the filter 22 is accommodated.

Description

  TECHNICAL FIELD The present invention relates to an auxiliary tool for syringe filtration work, and more specifically, an auxiliary tool for syringe filtration work used when filtering foreign matter mixed in a liquid such as a test solution using a syringe with a filter attached to the tip. About.

  As a pretreatment for various chemical analyses, in order to remove foreign matters mixed in a liquid such as a test solution, these liquids are used after passing through a filter. In particular, when handling a small amount of a test solution, a method is used in which the test solution is sucked into a commercially available syringe, a commercially available filter is attached to the tip of the syringe, and the reagent is pushed out by a plunger inserted into the syringe.

  When dealing with a large number of reagents, this work must be repeated, which is tedious and requires manual labor. Furthermore, the filter may come off due to pressurization during this operation, which leads to loss of the test solution.

  Conventionally, as shown in FIG. 5, a device has been proposed in which a plurality of syringes 51, filters 52 and filtrate receptacles 53 are arranged in a frame 50, and the upper part of the plunger 54 is pressure filtered by an extruder 55 having a manual screw mechanism. (See Patent Document 1). The frame 50 includes holding shelves 56 and 57 having openings into which the syringe 51 and the filtrate receiving container 53 are inserted, and a filter support shelf 58 that supports the filter 52.

JP 2007-160203 A

  When the plunger 54 is pushed into the syringe 51, when the test solution passes through the filter 52 and is filtered, the resistance in the filter 52 increases, and the pressure in the syringe 51 and the filter 52 increases. In the apparatus of Patent Document 1, the lower surface of the filter 52 is supported by the filter support shelf 58, but the peripheral surface of the syringe 51 is supported by the holding shelf 56, and the upward movement is not restricted. . Therefore, when the pressure increase in the filter 52 increases, the syringe 51 moves upward, the syringe 51 comes off from the filter 52, and the test solution may be scattered. When the test solution scatters, it is necessary to perform the treatment again, which not only decreases the efficiency but also wastes the test solution. Further, when the liquid of the test solution is not water but a combustible liquid such as alcohol, the scattered liquid becomes a problem.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to prevent the syringe from coming off from the filter when a liquid is filtered using a syringe having a filter attached to the tip. It is providing the auxiliary tool for syringe filtration work which can be performed.

  In order to achieve the above object, the invention according to claim 1 is a syringe filtering operation used when filtering foreign matter mixed in a liquid using a syringe having at least one filter attached to the tip. Aids. The support member and the support member are engaged with the upper surface of the flange of the syringe to which the filter is attached to restrict the movement thereof, and a part of the plunger inserted into the syringe is accommodated. An upper restricting member having an accommodating groove to be engaged with the lower surface of the filter attached to the syringe and provided on the support member to restrict the movement thereof, and a part of the outlet nozzle of the filter is accommodated. And a lower regulating member having an accommodating groove.

  Here, “the upper surface of the flange of the syringe” means the surface of the flange on the plunger insertion side. In addition, “the lower surface of the filter” means the surface opposite to the surface corresponding to the syringe of the filter when there is one filter attached to the syringe, and from the syringe when there are a plurality of filters. It means the surface opposite to the surface corresponding to the syringe of the farthest filter.

  When using a syringe filtration aid, at least one filter is attached to the tip, and the syringe with the liquid to be filtered is engaged with the upper surface of the flange engaged with the upper regulating member. Is supported by the support member in a state of being engaged with the lower regulating member. When the plunger is pushed into the syringe in this state, the inside of the syringe is pressurized, the impurities are filtered through the filter, and the filtrate is collected in the container. When the plunger is pushed into the syringe, when the liquid is filtered through the filter, the resistance in the filter increases, and the pressure in the syringe and the filter increases. When the pressure in the filter increases, a force that pushes down the filter acts on the filter, and a force that pushes up the syringe acts on the syringe. However, the lower surface of the filter is engaged with the lower restricting member and the downward movement is restricted, and the syringe is restricted from moving upward with the upper surface of the flange engaged with the upper restricting member. Therefore, even if the pressure in the filter rises, it is possible to prevent the syringe from coming off the filter.

  According to a second aspect of the present invention, in the first aspect of the present invention, the support member is engaged with a side surface of a connecting portion of the filter attached to the syringe and connected to the syringe in the lateral direction. A connection portion side surface regulating member that regulates movement is provided. When the operator pushes the plunger into the syringe during liquid filtration, the plunger may be pushed so that an oblique force acts on the syringe without pushing the plunger straight. At that time, the connection part side surface regulating member is engaged with the side surface of the connection part of the filter with the syringe, so that the connection part is restricted from moving in the lateral direction and an excessive force is prevented from acting on the connection part. The

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the support member is formed in a shape capable of supporting itself in a state of supporting the syringe. Therefore, in the present invention, when performing the filtering operation, the operator can filter foreign substances mixed in the liquid only by pushing the plunger into the syringe without supporting the syringe or the support member. This makes it easier to perform the filtering work than when the supporting member is not self-supporting.

  ADVANTAGE OF THE INVENTION According to this invention, when performing liquid filtration using the syringe with which the filter was attached to the front-end | tip, the auxiliary tool for syringe filtration work which can prevent that a syringe remove | deviates from a filter can be provided.

(A) is a perspective view of an auxiliary tool for syringe filtration work, (b) is a side view of the syringe attached to the auxiliary tool for syringe filtration work, and (c) is a front view of the same. (A) is a front view explaining an effect | action, (b) is a perspective view explaining the effect | action of the structure by which the movement to the upper side of a syringe is not controlled. (A), (b) is a side view of another embodiment of the auxiliary tool for syringe filtration work, (c) is a plan view showing the shape of the housing groove of another embodiment. (A), (b) is a side view of the auxiliary tool for syringe filtration work of another embodiment. The perspective view which shows the use condition of the pressure filtration apparatus of a prior art.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. 1 and 2.
As shown to Fig.1 (a), the auxiliary tool 10 for a syringe filtration operation | work is the support member 11, the upper side regulating member 12, each provided in the predetermined position of the supporting member 11, the lower side regulating member 13, and a connection part. And a side regulating member 14. As shown in FIGS. 1B and 1C, the support member 11 can be self-supporting in a state in which the syringe filtering work assisting tool 10 supports the syringe 21 having two filters 22 and 23 attached to the tip. Thus, the lower portion 11 a is formed in a state extending in parallel with the respective regulating members 12, 13, and 14. It is sufficient that at least one filter is attached to the syringe 21, but in this embodiment, two filters 22 and 23 are attached. The filter 22 is a filter for filtering solid matter, and the filter 23 is degreased. It is a filter for.

  The upper regulating member 12 engages with the upper surface of the flange 21a of the syringe 21 to which the filters 22 and 23 are attached to regulate its movement, and accommodates a part of the plunger 24 inserted into the syringe 21. A groove 12a is provided. The lower regulating member 13 engages with the lower surface of the filter 22 attached to the syringe 21 to regulate its movement, and has a housing groove 13a in which a part of the outlet nozzle 22a of the filter 22 is housed. The connecting portion side surface regulating member 14 engages with the side surface of the connecting portion 23a of the filter 23 attached to the syringe 21 with the syringe 21 to restrict lateral movement thereof, and a part of the connecting portion 23a is accommodated. The receiving groove 14a is provided.

  Each of the regulating members 12, 13, and 14 is formed in a side L shape and is fixed in a state where a portion fixed to the support member 11 extends downward. Each regulating member 12, 13, 14 is formed with a pair of screw holes so as to face each pair of holes formed at a predetermined position of the support member 11, and is screwed through the holes from the back side of the support member 11. The support member 11 is fastened and fixed by a screw 15 screwed into the hole.

  Each of the housing grooves 12 a, 13 a, and 14 a is formed to extend in a direction orthogonal to the support member 11. The flange 21a of the syringe 21 has an elliptical outer shape, and the length of the receiving groove 12a is longer than the length of the short axis of the ellipse so that the upper regulating member 12 can support the entire flange 21a. The width of the accommodation groove 12 a is formed to be slightly larger than the outer diameter of the plunger 24. The width of the accommodation groove 13 a is formed slightly larger than the outer diameter of the outlet nozzle 22 a of the filter 22. The width of the accommodation groove 14a is formed to be slightly larger than the outer diameter of the connection portion 23a. Moreover, the injection | emission part 21b of the syringe 21 is formed not in the center position of the syringe 21 but in the eccentric position.

  The material of the regulating members 12, 13, 14 and the support member 11 is considered to be made of metal such as stainless steel in terms of strength, but is not limited to metal, and may be made of plastic, wood, ceramic, or the like.

Next, the operation of the syringe filtration work auxiliary tool 10 configured as described above will be described.
When using the auxiliary tool 10 for syringe filtration work, as shown in FIGS. 1B and 1C, the liquid to be filtered is stored in the syringe 21 having two filters 22 and 23 attached to the tip. In this state, the syringe 21 is supported by the support member 11 with the upper surface of the flange 21 a engaged with the upper regulating member 12 and the lower surface of the filter 22 engaged with the lower regulating member 13. At this time, a part of the connection part 23 a of the filter 23 is accommodated in the accommodation groove 14 a of the connection part side surface regulating member 14. A container 25 for collecting the filtrate is disposed below the outlet nozzle 22a. In this state, when the plunger 24 is pushed into the syringe 21 by the operator's manual work, the liquid is pushed into the filters 22, 23. The liquid is filtered through the filter 23 and the solid is filtered through the filter 22. Is collected in the container 25.

  As shown in FIG. 2 (a), when force is applied to the plunger 24 in the direction of the arrow and the plunger 24 is pushed into the syringe 21, the liquid passes through the filters 23 and 22 in order and is filtered. Resistance in 22 and 23 increases, and the pressure in the syringe 21 and the filters 22 and 23 rises. When the pressure in the syringe 21 rises, a force that pushes down the filters 22 and 23 acts on the filters 22 and 23, and when the pressure in the filters 22 and 23 rises, a force pushes up the syringe 21 against the syringe 21. Works. At this time, as shown in FIG. 2A, the lower surface of the filter 22 is engaged with the lower regulating member 13 and the downward movement is regulated, and the syringe 21 is engaged with the upper regulating member 12 with the upper surface of the flange 21a. At the same time, the upward movement is restricted. Therefore, even if the pressure in the syringe 21 and the filters 22 and 23 rises, the syringe 21 is prevented from being detached from the filter 23. On the other hand, in the case of Patent Document 1, as shown in FIG. 2B, since there is no member for restricting the upward movement of the syringe 51, when the pressure increase in the filter 52 increases, the syringe 51 is filtered. May deviate from 52.

  When attaching the syringe 21 to the syringe filtration work auxiliary tool 10, from the position where the plunger 24, the outlet nozzle 22a, and the connecting portion 23a correspond to the openings of the accommodating grooves 12a, 13a, 14a of the regulating members 12, 13, 14, respectively. By moving toward the support member 11 side, it is arranged at a predetermined position. Therefore, unlike the configuration in which the syringe is inserted into the opening of the holding shelf from above the filtration device as in Patent Document 1, the syringe filtration work auxiliary tool 10 even if the outer diameter of the filters 22 and 23 is larger than the outer diameter of the syringe 21. Can be attached to.

According to this embodiment, the following effects can be obtained.
(1) The syringe filtration work auxiliary tool 10 is used when filtering foreign substances mixed in the liquid using a syringe 21 having at least one filter attached to the tip, and the support member 11; An upper regulating member 12 provided on the support member 11 and a lower regulating member 13 are provided. The upper regulating member 12 engages with the upper surface of the flange 21a of the syringe 21 to regulate its movement, and has an accommodation groove 12a in which a part of the plunger 24 inserted into the syringe 21 is accommodated. The lower regulating member 13 engages with the lower surface of the filter 22 attached to the syringe 21 to regulate its movement, and has a housing groove 13a in which a part of the outlet nozzle 22a of the filter 22 is housed. Therefore, it is possible to prevent the syringe 21 from being detached from the filter 23 when the liquid is filtered using the syringe 21 having the filters 22 and 23 attached to the tips. Further, unlike the filtering device of Patent Document 1, even if the outer diameter of the filters 22 and 23 is larger than the outer diameter of the syringe 21, the syringe 21 to which the filters 22 and 23 are attached can be used without any trouble for the auxiliary tool 10 for syringe filtration work. Can be attached.

  (2) The support member 11 is provided with a connection portion side surface regulating member 14 that engages with the side surface of the connection portion 23a of the filter 23 attached to the syringe 21 with the syringe 21 and restricts movement in the lateral direction. ing. When the operator pushes the plunger 24 into the syringe 21 during the filtration of the liquid, the plunger 24 may be pushed so that an oblique force acts on the syringe 21 without pushing the plunger 24 straight. At that time, the connection portion side surface regulating member 14 is engaged with the side surface of the connection portion 23a of the filter 23 with the syringe 21, so that the connection portion 23a is restricted from moving in the lateral direction, and an unreasonable force is exerted on the connection portion 23a. The action is suppressed.

  (3) The support member 11 is formed in a shape that can stand on its own in a state of supporting the syringe 21. Therefore, when performing the filtering operation, the operator can filter foreign substances mixed in the liquid only by pushing the plunger 24 into the syringe 21 without supporting the syringe 21 and the support member 11. It is possible to perform the filtering work more easily than when the support member 11 is not self-supporting.

  (4) The support member 11 is formed such that the lower portion 11a extends in parallel with the regulating members 12, 13, and 14. Therefore, the structure which enables it to become independent in the state in which the support member 11 supports the syringe 21 becomes simple.

  (5) Each regulating member 12, 13, 14 is formed in a side L shape and is fixed to the support member 11 with a screw 15. Therefore, it is easy and high in strength to fix each regulating member 12, 13, and 14 with a flat plate and to fix the base member with an adhesive or welding at high accuracy.

  (6) The housing grooves 12 a, 13 a, and 14 a of the restricting members 12, 13, and 14 are formed to extend in a direction orthogonal to the support member 11. Therefore, when the syringe 21 is disposed at a predetermined position of the syringe filtration work auxiliary tool 10, the syringe 21 can be easily disposed at a predetermined position by moving the syringe 21 straight from the front surface of the support member 11.

The embodiment is not limited to the above, and may be embodied as follows, for example.
The filter 22 and the filter 23 may be attached to the syringe 21 so that the filter 22 is disposed on the upper side and the filter 23 is disposed on the lower side. In this case, the lower surface of the filter 23 is engaged with the lower side regulation member 13, and the connection portion of the filter 22 is engaged with the connection side surface regulation member 14.

  O The filter attached to the syringe 21 may be at least one, and is not limited to two, and may be one or three or more. For example, only one solid material filtering filter 22 or degreasing filter 23 may be attached to the syringe 21. Moreover, you may combine the filter for other impurity filtration, the filter 22 for solid substance filtration, or the filter 23 for degreasing | defatting.

  ○ The syringe filtration work auxiliary tool 10 is not configured to be used in a self-supporting state, but is used in a state where the support member 11 is fixed to the support base, or in a state where the operator holds the syringe filtration work auxiliary tool 10 by hand. It may be configured. For example, as shown in FIG. 3 (a), a configuration in which the operator holds the syringe filtration work auxiliary tool 10 by hand, as shown in FIG. , 13, 14 are fixed, or as shown in FIG. 3B, the upper regulating member 12 and the lower regulating member 13 are integrally formed by bending the end portion of the support member 11. .

  ○ The configuration in which the assisting tool for syringe filtration work 10 is maintained in a self-supporting state when the plunger 24 is pushed into the syringe 21 is formed in a state in which the lower portion 11a of the support member 11 extends in parallel with the regulating members 12, 13, and 14. The configuration is not limited. For example, as shown in FIG. 4A, the lower portion 11a of the support member 11 is bent forward and then bent back, or the lower portion 11a of the support member 11 as shown in FIG. 4B. May be bent to the rear side, and the lower portion 11a may be fixed to the support base 16. Further, the lower portion 11a of the support member 11 may be fixed to the support base 16 without being bent.

  The receiving grooves 12 a, 13 a, and 14 a of the restricting members 12, 13, and 14 are not limited to shapes that extend in a direction orthogonal to the support member 11. For example, as shown in FIG. 3C, the accommodation groove 12a and the like are formed in an arc shape, and the syringe 21 is attached to the syringe filtration work auxiliary tool 10 from the side thereof, or the accommodation groove 12a. Or the like may be formed so as to extend obliquely or in an L shape.

  Each of the regulating members 12, 13, 14 may be fixed to the support member 11 with welding or an adhesive instead of being fixed to the support member 11 with the screw 15. Moreover, each regulating member 12, 13, and 14 is not limited to the L-shaped side surface, but may be formed in a flat plate shape and the base end may be fixed to the supporting member 11 by welding or an adhesive.

O Although the upper side control member 12 and the lower side control member 13 are essential, the connection part side surface control member 14 may be abbreviate | omitted.
○ The liquid in the syringe 21 is pushed out by the plunger 24 and is not limited to the method of filtering impurities in the liquid by passing through the filter 22 or the like, but the liquid is drawn by the suction force when the plunger 24 is pulled out from the syringe 21. You may apply to the method of filtering the impurity in a liquid by letting the filter 22 grade | etc., And suck | inhaling in the syringe 21. FIG.

The syringe 21 may have a circular outer shape of the flange 21a, or may form the injection portion 21b at the center position instead of the eccentric position.
○ The syringe filtration work auxiliary tool 10 is not limited to a configuration that supports a single syringe 21, but supports a plurality of syringes 21, and filters the liquid in the syringes 21 with a plunger 24 at the same time or one by one. It may be extruded to the container 25 through 23.

The following technical idea (invention) can be understood from the embodiment.
(1) In the invention according to claim 3, the support member is formed such that a lower portion thereof extends in parallel with the restriction member.

  (2) In the invention according to any one of claims 1 to 3 and the technical idea (1), the regulating member is formed in a side L shape and is fixed to the support member. The part is fixed to the support member by screws.

  DESCRIPTION OF SYMBOLS 10 ... Auxiliary tool for syringe filtration work, 11 ... Support member, 12 ... Upper side regulation member, 12a, 13a, 14a ... Housing groove, 13 ... Lower side regulation member, 14 ... Connection part side surface regulation member, 21 ... Syringe, 21a ... Flange, 22, 23 ... filter, 22a ... outlet nozzle, 23a ... connection, 24 ... plunger.

Claims (3)

A syringe filtration auxiliary tool for use in filtering foreign matter mixed in a liquid using a syringe having at least one filter attached to the tip,
A support member;
An upper side having a receiving groove that is provided on the support member, engages with an upper surface of a flange of a syringe to which the filter is attached, restricts the movement thereof, and accommodates a part of a plunger inserted into the syringe. A regulating member;
A lower regulating member that is provided on the support member and engages with the lower surface of the filter attached to the syringe to regulate its movement and has a housing groove in which a part of the outlet nozzle of the filter is accommodated; An auxiliary tool for syringe filtration work comprising:   The connection part side surface regulating member which engages with the side surface of the connection part with the said syringe of the filter attached to the said support member, and regulates the movement to the horizontal direction is provided in the said support member. The assisting tool for syringe filtration work as described.   The said support member is an auxiliary tool for syringe filtration work of Claim 1 or Claim 2 currently formed in the shape which can be self-supported in the state which supports the said syringe.

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