JP5869825B2 - Barrel with cap, cap, and prefilled syringe - Google Patents

Description

  The present invention relates to a barrel with a cap, a cap, and a prefilled syringe including a sealing portion that seals a nozzle portion of a barrel main body.

  Conventionally, as a barrel with a cap, a barrel main body portion having a nozzle portion at a tip portion, a sealing portion for sealing the nozzle portion, and a cylindrical cap for disposing the sealing portion therein and fixing the sealing portion A barrel with a cap is known that includes a main body portion and a cylindrical connecting portion that is fixed to the distal end portion of the barrel main body portion and disposed on the proximal end side of the cap main body portion (for example, Patent Document 1). .

  According to the barrel with a cap having such a configuration, since the base end portion of the cap main body portion and the distal end portion of the connection portion are connected by the connection piece, the cap main body portion is connected to the connection portion by breaking the connection piece. And the nozzle part is opened. After that, when the sealing part returns to the state of sealing the nozzle part again, since the connecting piece is broken as a trace, the nozzle part is opened (or suspected). It can be recognized by a third party.

JP-A-9-108350

  By the way, in the barrel with a cap according to Patent Document 1, in order to recognize that the nozzle portion has been opened (or that there is a suspicion), it is necessary to check whether or not the connecting piece is broken. . However, since such a connecting piece is generally small, there is a demand for more easily recognizing that the nozzle portion has been opened.

  Therefore, in view of such circumstances, an object of the present invention is to provide a barrel with a cap, a cap, and a prefilled syringe that can easily recognize that the nozzle portion has been opened.

Moreover, the cap which concerns on this invention is a cylindrical cap main body which fixes a sealing part which seals the sealing part which seals the nozzle part provided in the front-end | tip part of a barrel main-body part inside, and a sealing part inside And a cylindrical connecting portion that is fixed to the distal end portion of the barrel main body portion and attaches the cap main body portion to the inner peripheral portion, and the cap main body portion is screwed into the base end portion with the connecting portion. A cap screwing portion and an elastically deformable elastic portion, and configured to be movable in the axial direction toward the distal end side with respect to the connecting portion so as to be detached from the leading end portion of the connecting portion; It is disposed at the distal end portion, and the threaded portion screwed connecting screwed portion, is disposed on the base end portion, a connecting fixing portion fixed to the distal end of the barrel main body portion, a cap of Ru with a Te, the cap body portion is connected to the elastic portion, the cap body portion which is and disengaged To prevent from being remounted in connection part comprises a re-attachment preventing portion for locking the connecting portion, the connecting portion includes a middle portion between the connection fixing part and the connecting screwed portion,
The elastic part and the remount prevention part are arranged so that the elastic part does not elastically deform when the sealing part seals the nozzle part in the middle part in a state where the cap screw part and the connection screw part are screwed together. position be characterized by Rukoto.

According to the cap having such a configuration, the cap main body portion is attached to the inner peripheral portion of the connection portion. And a cap main-body part remove | deviates from a front-end | tip part of a connection part because an axial direction moves toward a front end side with respect to a connection part. Thereafter, since the cap main body portion includes the remount preventing portion that locks the connection portion , the detached cap main body portion can be prevented from being remounted on the connection portion.

According to the cap having such a configuration, the cap main body portion is mounted on the inner peripheral portion of the connection portion, and the elastic portion is provided on the cap main body portion. And when a sealing part seals a nozzle part, it prevents that the inner peripheral part of a connection part elastically deforms an elastic part. Therefore, even if the sealing portion is maintained for a long time in a state of sealing the nozzle portion, it is possible to prevent the elastic force of the elastic portion from being lowered (the elastic portion is plastically deformed).

Further, in the cap according to the present invention, the elastic portion is configured to elastically deform radially inward when the cap main body portion moves in the axial direction toward the distal end side with respect to the connection portion. Also good.

According to the cap having such a configuration, when the cap main body portion moves in the axial direction toward the distal end side with respect to the connection portion, the elastic portion provided in the cap main body portion is elastically deformed in the radial direction. As a result, when the cap body moves relative to the connecting portion in the axial direction toward the distal end, the elastic portion is elastically deformed, so that the remounting prevention portion connected to the elastic portion is in the radial direction. On the other hand, when the cap body part is detached from the connection part, the elastic part is restored so that the remounting prevention part can lock the cap body part or the connection part.

Moreover, the cap which concerns on this invention is a cylindrical cap main body which fixes a sealing part which seals the sealing part which seals the nozzle part provided in the front-end | tip part of a barrel main-body part inside, and a sealing part inside and a section, the cap main body, while being mounted on the outer peripheral portion of the cylindrical connecting portion provided at the distal end portion of the barrel main body portion, to be disengaged from the distal end portion of the connecting portion, the axis relative to the connecting portion The cap is configured to be movable toward the distal end side, and the cap main body portion is disposed outside the engagement member to be engaged with the connection portion and to be attached to the connection portion. A cylindrical moving member, and the engaging member is disposed along the axial direction and elastically deformable radially inward, and an engagement restricting portion disposed on the outer periphery of the elastic piece. And a protruding portion disposed on the base end side of the elastic piece, and on the base end side, the cap body Has a re-mounting preventing portion for locking the connecting portion in order to prevent reattachment to the connecting portion after being detached from the distal end portion of the connecting portion, and from the proximal end side of the elastic piece to the distal end side. And a projecting portion that has an engaging portion that engages with the connecting portion in a state in which the elastic piece projects inward in the radial direction and elastically deforms radially inward, and the moving member is disposed on the proximal end side From an exposed state in which the elastic piece, the engagement restricting portion, and the protruding portion are exposed to the engaging member with the movement restricting portion, to an accommodation state in which the elastic piece, the engaging restricting portion, and the protruding portion are accommodated. It is configured to be movable in the axial direction toward the base end side, and in the exposed state, the elastic piece is disposed so as to expand radially outward toward the base end side, and the protruding portion is the outer periphery of the connection portion. In the accommodated state, the elastic piece is elastically deformed radially inward and reduced in diameter. The engagement restricting portion and the movement restricting portion engage so as to restrict the movement member from moving in the axial direction toward the distal end side with respect to the engagement member, and the engagement portion is radially outward. The remount preventing portion is configured to be able to lock the front end side of the mounting portion after the cap main body portion is detached from the front end portion of the connection portion. And

According to the cap having such a configuration, the cap main body portion is attached to the outer peripheral portion of the connection portion. And a cap main-body part remove | deviates from a front-end | tip part of a connection part because an axial direction moves toward a front end side with respect to a connection part. Thereafter, since the cap main body portion includes the remount prevention portion that locks the connection portion, the detached cap main body portion can be prevented from being remounted on the connection portion.

According to the cap having such a configuration, the elastic piece provided on the engaging member is disposed along the axial direction and is disposed so as to expand radially outward toward the proximal end side. When the cylindrical moving member arranged outside the engaging member moves to the proximal end side in the axial direction with respect to the engaging member, the elastic piece moves radially inward on the proximal end side. By elastically deforming, the engaging portion protruding radially inward from the base end side of the elastic piece moves radially inward and engages with the connecting portion.

Thereby, since an engaging member engages with a connection part via an engagement part, a cap main-body part is mounted | worn with the outer peripheral part of a connection part. Furthermore, the restricting portion provided on at least one of the engaging member and the moving member restricts the moving member from moving in the axial direction toward the distal end side with respect to the engaging member. Therefore, since the state in which the engaging portion is engaged with the connecting portion can be maintained, the state in which the cap main body portion is attached to the connecting portion can be maintained.

Moreover, as for the barrel with a cap which concerns on this invention, the said cap may be attached to the front-end | tip part. According to the barrel with a cap according to the present invention, the cap main body portion is mounted on the outer peripheral portion or the inner peripheral portion of the connection portion. And a cap main-body part remove | deviates from a front-end | tip part of a connection part because an axial direction moves toward a front end side with respect to a connection part. Thereafter, since the cap main body portion includes the remount preventing portion that locks the connection portion, the detached cap main body portion can be prevented from being remounted on the connection portion.

  Further, a prefilled syringe according to the present invention includes the barrel with the cap and an elastic gasket inserted into the barrel main body to seal the filler filled in the barrel main body. Features.

  As described above, according to the present invention, since the detached cap body portion can be prevented from being reattached to the connection portion, when the nozzle portion is opened, the sealing portion then seals the nozzle portion again. It is possible to prevent the state from being restored. Therefore, according to the present invention, it is possible to easily recognize that the nozzle part has been opened.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view of the prefilled syringe which concerns on one Embodiment of this invention, Comprising: (a) is a front view, (b) shows sectional drawing in the AA line. The whole longitudinal cross-sectional view of the sealing state in the cap which concerns on the embodiment is shown. It is a general view of the cap concerning the embodiment, (a) is a perspective view of a sealed state, (b) shows a perspective view of an opened state. It is a block diagram of the cap which concerns on the same embodiment, Comprising: (a) is the whole perspective view of a sealing part, (b) is the whole longitudinal cross-sectional view, (c) is a whole perspective view of a cap main-body part, (d) Is an overall vertical cross-sectional view, (e) is an overall perspective view of the connecting portion, and (f) is an overall vertical cross-sectional view. It is a figure explaining the sealing method of the nozzle part by the cap concerning the embodiment, (a) And (b) shows a longitudinal section, respectively. It is a figure explaining the sealing method of the nozzle part by the cap concerning the embodiment, (a) And (b) shows a longitudinal section, respectively. It is a figure explaining the opening method of the nozzle part by the cap concerning the embodiment, (a) And (b) shows a longitudinal section, respectively. It is a general view of the cap concerning other embodiments of the present invention, (a) is a front view after wearing, and (b) shows the longitudinal section. It is a whole figure of the cap concerning the embodiment, Comprising: The longitudinal cross-sectional view before mounting | wearing is shown. It is a figure explaining the sealing method of the nozzle part by the cap concerning the embodiment, (a) And (b) shows a longitudinal section, respectively. It is a figure explaining the opening method of the nozzle part by the cap concerning the embodiment, (a) And (b) shows a longitudinal section, respectively. It is a figure explaining the sealing method of the nozzle part by the cap concerning other embodiment of the present invention, and (a) and (b) show a longitudinal section, respectively. It is a figure explaining the opening method of the nozzle part by the cap concerning the embodiment, (a) And (b) shows a longitudinal section, respectively.

  Hereinafter, a first embodiment of a cap, a barrel with a cap, and a prefilled syringe according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 to 4, the prefilled syringe according to the present embodiment fills the inside of the barrel 1 with a barrel 1 having a nozzle portion 111 at the tip, a cap 2 attached to the tip of the barrel 1, and the barrel 1. And a plunger 3 for sealing the filling X such as the chemical solution. In the following description, “upper (side)” in FIG. 1 is referred to as “tip (side)”, and “lower (side)” in FIG. 1 is referred to as “base (side)”.

  The barrel 1 includes a cylindrical barrel main body 11 having a nozzle portion 111 at a distal end thereof, and a finger hooking portion 12 that is disposed in a flange shape at the base end portion of the barrel main body 11 and for hooking a finger. The barrel 1 is formed of, for example, a resin such as plastic or glass.

  The barrel main body 11 has a cylindrical barrel base 112 whose tip is connected to the base end of the nozzle 111, and a luer-lock (screw-in) injection needle and an access point disposed at the tip of the barrel base 112. And an attachment portion 113 for attaching a port (mixed injection means to the infusion line). Further, the barrel main body 111 includes a barrel fixing portion 114 that is disposed at the distal end portion of the barrel base portion 112 and fixes the cap 2.

The nozzle unit 111 includes a spout 111a for pouring the filler X filled in the barrel base 112 to the outside, and the spout 111a and the barrel base 112 so that the filler X flows. And a circulation part 111b for communicating with the inside of the machine. The nozzle portion 111 is formed in a cylindrical shape, and is formed in a tapered shape so that the outer diameter decreases from the proximal end portion toward the distal end portion.

The barrel base 112 is formed in a cylindrical shape. The barrel base 112, as large and inner diameter than the outer diameter of the outer diameter of the nozzle portion 111 is larger than the inner diameter of the nozzle portion 111 is formed. Further, the barrel base 112 is formed so that the outer diameter is larger than the outer diameter of the cap 2.

  The attachment portion 113 includes an attachment portion main body 113a formed in a cylindrical shape, and a screw portion 113b disposed on the inner peripheral portion of the attachment portion main body 113a so as to be screwed with an injection needle or the like at the inner peripheral portion. That is, the screw part 113b is a female screw. Further, the attachment portion 113 is disposed radially outward of the nozzle portion 111 so as to insert the nozzle portion 111. Note that the tip end of the nozzle portion 111 protrudes from the tip end of the attachment portion 113.

  The barrel fixing portion 114 is annularly extended along the circumferential direction, and is disposed radially outward from the nozzle portion 111 and the attachment portion 113. Specifically, the barrel fixing portion 114 protrudes radially outward from the base end portion of the attachment portion 113. Further, the barrel fixing portion 114 includes a concave fitting portion 114a for fitting with the cap 2 on the outer peripheral portion.

  The cap 2 includes a sealing portion 21 that seals the nozzle portion 111 provided at the distal end portion of the barrel main body portion 11, and a cylindrical cap body that places the sealing portion 21 inside and fixes the sealing portion 21. Part 22. Further, the cap 2 includes a cylindrical connecting portion 23 that is fixed to a barrel fixing portion 114 provided at a tip portion of the barrel main body portion 11 and that attaches the cap main body portion 22 to the inner peripheral portion.

The sealing portion 21 is disposed on the distal end side of the sealing portion main body 211 and the sealing portion main body 211 attached to the distal end portion of the nozzle portion 111, and the cap main body portion 22 is integrated with the cap main body portion 22. And a sealing fixing portion 212 fixed to the head. In addition, the sealing part 21 is formed with resin, such as rubber | gum, for example.

  The sealing portion main body 211 is formed in a cylindrical shape that closes the distal end side, and when attached to the nozzle portion 111, closes the spout 111a and fits the distal end portion of the nozzle portion 111 from the outside. In addition, the sealing fixing portion 212 is formed in a columnar shape and has an outer diameter larger than that of the sealing portion main body 211.

  The cap main body portion 22 includes a cap base portion 221 formed in a cylindrical shape, and a cap fixing portion 222 that is disposed at the distal end portion and fixes the sealing portion 21. The cap main body 22 includes a cap screwing portion 223 that is screwed with the connecting portion 23, and moves axially toward the tip end side with respect to the connecting portion 23 so as to be detached from the tip end portion of the connecting portion 23. It is configured to be possible.

  Then, the cap body 22 is elastically deformed in the radial direction when moving in the axial direction toward the distal end with respect to the connecting portion 23, and the connecting portion 23 after being detached from the connecting portion 23. In order to prevent reattachment, a reattachment prevention unit 225 connected to the elastic part 224 is provided. In addition, the cap main-body part 22 is formed with resin, such as a plastics, for example.

  The cap fixing part 222 includes clamping parts 222a and 222b that clamp the sealing fixing part 212 in the axial direction. One clamping part 222a projects radially inward from the distal end of the cap base 221 and abuts against the distal side surface of the sealing fixing part 212, while the other clamping part 222b It protrudes radially inward from the midway part of the base part 221, and is in contact with the base end side surface of the sealing fixing part 212.

  The cap screwing portion 223 is disposed at the base end portion of the cap main body portion 22. Specifically, the cap screwing portion 223 is disposed at the base end portion of the cap base portion 221 and the elastic portion 224. Further, the cap screwing portion 223 is disposed on the outer peripheral portion of the cap main body portion 22. That is, the cap screw part 223 is a male screw.

  The elastic part 224 includes a plurality of elastic band members 224a arranged along the axial direction. The plurality of belt members 224a,... Are arranged in parallel along the circumferential direction. Each band member 224a is connected to the proximal end portion of the cap base portion 221 at the distal end portion, and is formed so as to expand radially outward toward the proximal end side in a state where it is not elastically deformed.

  The remount preventing portion 225 includes a locking portion 225 a that protrudes radially outward from the base end portion of each band member 224 a and locks the connection portion 23. The remount preventing portion 225 has an outer diameter (a diameter of a circumscribed circle of each locking portion 225a and an outer width dimension) when the elastic portion 224 is restored (not elastically deformed). It is comprised so that it may become larger than the internal diameter (inner width dimension).

  The connection portion 23 includes a connection portion main body 231 formed in a cylindrical shape, a connection fixing portion 232 fixed to the barrel fixing portion 114, a connection screwing portion 233 screwed with the cap screwing portion 223, and a sealing portion. And a deformation preventing portion 234 that prevents the elastic portion 224 from elastically deforming when the nozzle portion 111 is sealed. In addition, the connection part 23 is formed with resin, such as a plastics, for example.

  The connection fixing portion 232 is disposed at the proximal end portion of the connection portion 23. And the connection fixing | fixed part 232 is fixed to the barrel fixing | fixed part 114 so that the barrel fixing | fixed part 114 may be fitted from the outside. Further, the connection fixing portion 232 includes a convex fitting portion 232 a that fits with the concave fitting portion 114 a of the barrel fixing portion 114. The fitting portion 232a of the connection fixing portion 232 protrudes inward in the radial direction and extends along the circumferential direction.

  The connection screw part 233 is disposed at the tip of the connection part 23. Specifically, the connection screwing part 233 is disposed in the connection part main body 231. Further, the connection screw part 233 is disposed on the inner peripheral part of the connection part 23. That is, the connection screw part 233 is a female screw. Then, the cap main body portion 22 is attached to the connection portion 23 by the cap screw portion 223 and the connection screw portion 233.

  The deformation preventing portion 234 is formed in a cylindrical shape and is an intermediate portion in the axial direction of the connection portion 23 and is disposed between the connection portion main body 231 and the connection fixing portion 232. Further, the deformation preventing unit 234 includes a positioning unit 234a that contacts the remounting preventing unit 225 in the axial direction so that the cap main body unit 22 is positioned with respect to the connection unit 23.

  And the deformation | transformation prevention part 234 is formed so that an inner peripheral part may space apart in the radial direction from the elastic part 224 and the reattachment prevention part 225, when the sealing part 21 seals the nozzle part 111. FIG. Specifically, the deformation preventing portion 234 is formed so that the inner diameter is larger than the outer diameters of the elastic portion 224 and the remount preventing portion 225.

  The plunger 3 includes an elastic gasket 31 inserted into the barrel main body 11 to seal the filling X filled in the barrel main body 11, and a plunger rod whose tip is screw-coupled to the gasket 31. 32. The assembly of the barrel 1 and the cap 2 is referred to as “barrel with cap”, and the assembly of the barrel with cap (barrel 1 and cap 2) and the plunger 3 is referred to as “syringe”.

  The configurations of the cap 2, the barrel with cap, and the prefilled syringe according to the present embodiment are as described above. Next, the sealing method and the opening method of the nozzle portion 111 with the cap 2 according to the present embodiment will be described with reference to FIG. Description will be given with reference to FIG.

  First, a method for sealing the nozzle portion 111 with the sealing portion 21 will be described. First, as shown in FIG. 5A, the distal end portion of the cap main body portion 22 with the sealing portion 21 fixed therein is inserted into the inside from the proximal end portion of the connection portion 23. At this time, since the outer diameter of the distal end portion of the cap main body portion 22 is smaller than the inner diameter of the proximal end portion of the connection portion 23, the distal end portion of the cap main body portion 22 can be easily inserted into the connection portion 23.

  Further, after the tip end portion of the cap main body portion 22 protrudes from the tip end portion of the connection portion 23, the cap screw portion 223 and the connection screw portion 233 are screwed together, and the cap main body portion 22 is connected to the connection portion 23. Move toward the tip side. Then, as shown in FIG. 5B, the cap screwing part 223 and the connecting screwing part 233 at a position where the positioning part 234 a of the connecting part 23 contacts the remounting preventing part 225 of the cap main body part 22 in the axial direction. When the screwing is stopped, the cap main body portion 22 is attached to the inner peripheral portion of the connection portion 23.

  Note that such a position is an initial position (sealing position) of the cap body portion 22, and is a position where the sealing portion 21 can seal the nozzle portion 111 when the cap 2 is attached to the barrel 1. At this time, since the deformation preventing part 234 is separated from the elastic part 224 and the remounting preventing part 225 with a small gap in the radial direction, the elastic part 224 is not elastically deformed (is restored). .

  Then, as shown in FIG. 6A, the cap 2 is pushed into the barrel 1 so that the nozzle portion 111 is inserted into the sealing portion main body 211. Then, when the cap 2 is further pushed into the barrel 1 toward the base end side, as shown in FIG. 6B, the connection fixing portion 232 fits the barrel fixing portion 114 from the outside, and the barrel fixing portion 114 is connected. The fixing part 232 is fixed. Thereby, the cap 2 is attached to the barrel 1, and the sealing portion 21 seals the nozzle portion 111.

  Next, a method for opening the nozzle portion 111 will be described. First, when the cap main body portion 22 is located at the initial position, the elastic portion 224 is not elastically deformed. From this state, when the cap screwing part 223 and the connection screwing part 233 are screwed together, the cap main body part 22 located at the initial position moves toward the tip side with respect to the connection part 23.

At this time, as the cap main body portion 22 moves, the connection portion 23 presses the remount preventing portion 225 toward the radially inner side. As a result, the elastic portion 224 is elastically deformed so as to move the proximal end portion radially inward, so that the remount preventing portion 225 moves radially inward. Specifically, when the elastic portion 224 is elastically deformed, the base end portion of the cap main body portion 22 is reduced in diameter. In addition, since the cap screwing part 223 is also arranged in the elastic part 224, the elastic part 224 is elastically deformed corresponding to the screwing of the cap screwing part 223 and the connection screwing part 233.

  Further, when the cap main body portion 22 is moved toward the front end side with respect to the connection portion 23, the cap main body portion 22 is detached from the front end portion of the connection portion 23 as shown in FIG. 22 is located at the disengagement position. Along with this, the sealing portion 21 is also detached from the nozzle portion 111, so that the nozzle portion 111 is opened.

  By the way, when it is attempted to reattach the detached cap main body 22 to the connection portion 23, the elastic portion 224 has been restored, so that the base of the cap main body 22 is shown in FIG. The end portion remount prevention portion 225 locks the tip end portion of the connection portion 23. Therefore, the detached cap main body portion 22 cannot be attached to the connection portion 23.

  As described above, according to the cap 2, the barrel with a cap, and the prefilled syringe according to the present embodiment, the cap main body portion 22 is attached to the inner peripheral portion of the connection portion 23. Then, the cap body 22 moves away from the distal end portion of the connection portion 23 by moving the axial direction toward the distal end side with respect to the connection portion 23.

  Thereafter, since the cap main body portion 22 includes the reattachment prevention portion 225 that locks the connection portion 23, the detached cap main body portion 22 can be prevented from being reattached to the connection portion 23. Therefore, when the nozzle part 111 is opened, the sealing part 21 can be prevented from returning to the state in which the nozzle part 111 is sealed again, so that the nozzle part 111 can be easily recognized as being opened. it can.

  Further, according to the cap 2, the barrel with cap, and the prefilled syringe according to the present embodiment, the elastic portion 224 has a diameter when the cap main body portion 22 moves in the axial direction toward the distal end side with respect to the connection portion 23. Elastically deforms in the direction. Thereby, when the cap main-body part 22 moves toward the front-end | tip side with respect to the connection part 23, the remounting prevention part 225 can move to radial direction because the elastic part 224 elastically deforms.

On the other hand, when the cap main body portion 22 is detached from the connection portion 23, the reattachment prevention portion 225 can lock the connection portion 23 by restoring the elastic portion 224. Therefore, when the cap main body portion 22 moves toward the distal end side with respect to the connection portion 23, the cap main body portion 22 can be smoothly moved, and when the cap main body portion 22 is detached from the connection portion 23. It is possible to prevent the cap main body portion 22 from being reattached to the connection portion 23.

  Further, according to the cap 2, the barrel with cap, and the prefilled syringe according to the present embodiment, the inner peripheral portion of the connection portion 23 (deformation prevention portion 234) is separated from the elastic portion 224 and the remount prevention portion 225 in the radial direction. Therefore, the elastic part 224 can be prevented from being elastically deformed when the sealing part 21 seals the nozzle part 111. Therefore, even if the sealing part 21 is maintained (stored) for a long time in a state in which the nozzle part 111 is sealed, the elastic force of the elastic part 224 can be prevented from being lowered (the elastic part 224 is plastically deformed). .

  Next, a second embodiment of the cap and the barrel with the cap according to the present invention will be described with reference to FIGS. 8 to 11, the parts denoted by the same reference numerals as those in FIGS. 1 to 7 represent the same configurations or elements as those in the first embodiment.

  As shown in FIGS. 8 and 9, the barrel with a cap according to the present embodiment includes a barrel 10 having a nozzle portion 111 at a tip portion and a cap 4 attached to the tip portion of the barrel 10. In the following description, “upper (side)” in FIGS. 8 and 9 is referred to as “tip (side)”, and “lower (side)” in FIGS. 8 and 9 is referred to as “base end (side)”.

  The barrel 10 includes a cylindrical barrel main body 110 having a nozzle portion 111 at the tip. Further, the barrel 10 includes a cylindrical connecting portion 130 that is provided at the distal end portion of the barrel main body 110 and attaches the cap 4 to the outer peripheral portion.

  The barrel main body portion 110 includes a cylindrical barrel base portion 112 having a distal end portion connected to a proximal end portion of the nozzle portion 111. In addition, the barrel main body 110 includes a guide portion 115 that guides the cap 4 when the cap 4 is detached from the nozzle portion 111.

  The guide part 115 is disposed radially outward from the nozzle part 111 and the connection part 130. Specifically, the guide part 115 protrudes radially outward from the base end part of the connection part 130. And the guide part 115 is cyclically | annularly extended along the circumferential direction, and is formed in uneven | corrugated shape along the circumferential direction.

  The connecting portion 130 includes a connecting portion main body 131 formed in a cylindrical shape, a screw portion 132 disposed on an inner peripheral portion of the connecting portion main body 131 so as to be screwed with a luer lock type injection needle, an access port, and the like. In order to attach the cap 2 to the outer peripheral portion, a mounting portion 133 disposed on the outer peripheral portion of the connecting portion main body 131 is provided. Moreover, the connection part 130 is arrange | positioned in the radial direction outer side of the nozzle part 111 so that the nozzle part 111 may be inserted. It should be noted that the tip of the nozzle part 111 protrudes from the tip of the connection part 130.

  The mounting part 133 is annularly extended along the circumferential direction. Specifically, the mounting portion 133 protrudes radially outward from a midway portion in the axial direction of the connection portion main body 131. Further, the surface on the distal end side of the mounting portion 133 is formed along the radial direction, and the surface on the proximal end side of the mounting portion 133 is tapered so as to go inward in the radial direction toward the proximal end side. Is formed.

  The cap 4 includes a sealing portion 41 that seals the nozzle portion 111 provided at the tip of the barrel main body 110, and a cylindrical cap body that fixes the sealing portion 41 while the sealing portion 41 is disposed inside. Part 42. The cap 4 is configured to be movable in the axial direction toward the distal end side with respect to the connecting portion 130 so that the attached cap main body portion 42 is detached from the distal end portion of the connecting portion 130.

Sealing portion 41, a sealing body 411 which is attached to the distal end of the nozzle portion 111 is disposed on the distal end side of the sealing body 411, cap body 42 and the cap body 42 so as to be integrally And a sealing fixing portion 412 fixed to the head. And the sealing part main body 411 is formed in the cylindrical shape which obstruct | occludes the front end side, and when the nozzle part 111 is mounted | worn, it fits the front-end | tip part of the nozzle part 111 from the outside. In addition, the sealing fixing portion 412 is formed in a columnar shape and has an outer diameter larger than that of the sealing portion main body 411.

  The cap main body portion 42 includes an engaging member 43 that engages with the connecting portion 130 so as to be attached to the connecting portion 130. In addition, the cap main body portion 42 includes a cylindrical moving member 44 that is disposed outside the engaging member 43 and is movable with respect to the engaging member 43 in the axial direction toward the base end side.

  The engaging member 43 includes an engaging portion main body 431 formed in a cylindrical shape, an engaging fixing portion 432 that is arranged at the distal end portion and fixes the sealing portion 41, and a plurality of (this book) arranged along the axial direction. Eight elastic pieces 433 are provided in the embodiment. The engaging member 43 includes projecting portions 434,... Projecting radially inward from the base end side of each elastic piece 433 and extending in the circumferential direction.

  When the cap 4 is attached to the barrel 10, the engaging member 43 temporarily stops the moving member 44, and the moving member 44 moves from the predetermined position toward the tip side in the axial direction. And a restricting portion (hereinafter referred to as “engagement restricting portion”) 436. Note that the engaging member 43 is formed of a resin such as plastic, for example.

  The engagement fixing portion 432 includes clamping portions 432a and 432b that clamp the sealing fixing portion 412 in the axial direction. One clamping portion 432a projects radially inward from the distal end portion of the engaging portion main body 431, abuts against the distal end side surface of the sealing fixing portion 412, and the other clamping portion 432b , Projecting radially inward from the midway part of the engaging part main body 431, and abuts against the proximal side surface of the sealing fixing part 412.

  The plurality of elastic pieces 433 are arranged in parallel along the circumferential direction. Each elastic piece 433 extends from the proximal end portion of the engaging portion main body 431 toward the proximal end side. Further, each elastic piece 433 is arranged so as to expand radially outward toward the base end side in a state where it is not elastically deformed (restored), and overlaps the moving member 44 in the axial direction.

  Each protrusion 434 has a re-mounting prevention portion 434a that locks the distal end side of the mounting portion 133 on the proximal end side to prevent the cap main body portion 42 from being remounted on the connection portion 130 after the cap main body portion 42 is detached. Prepare. In addition, each protrusion 434 is elastically deformed so that the moving member 44 moves in the axial direction to the base end side and each elastic piece 433 moves in the radial direction inward in the base end side. An engagement portion 434b that engages with the proximal end side is provided on the distal end side.

  The plurality of projecting portions 434,... Have a diameter of an inscribed circle outside the mounting portion 133 of the connection portion 130 in a state where each elastic piece 433 is elastically deformed so that the base end side moves radially inward. It is comprised so that it may become smaller than a diameter. The base end side surface of each protrusion 434 is formed along the radial direction, and the tip end surface of each protrusion 434 tapers outward in the radial direction toward the front end. It is formed in a shape.

  The temporary fixing portion 435 protrudes radially outward from the outer peripheral portion of the engaging portion main body 431 and extends along the circumferential direction. The surface on the proximal end side of the temporary fixing portion 435 is formed along the radial direction, and the surface on the distal end side of the temporary fixing portion 435 is tapered so as to go radially inward toward the distal end side. It is formed in a shape.

  The engagement restricting portion 436 protrudes radially outward from the outer peripheral portion of each elastic piece 433 and extends along the circumferential direction. Then, the engagement restricting portion 436 is configured so that the moving member 44 has the axial direction distal to the engaging member 43 so as to maintain the engaging portion 434b of the protruding portion 434 engaged with the mounting portion 133 of the connecting portion 130. Restrict movement to the side. The surface on the proximal end side of the engagement restricting portion 436 is formed along the radial direction, and the surface on the distal end side of the engagement restricting portion 436 is directed radially inward as going to the distal end side. It is formed in a tapered shape.

  The moving member 44 includes a moving portion main body 441 formed in a cylindrical shape, and a restriction that engages with the engagement restricting portion 436 so as to restrict the movement of the moving member 44 from the predetermined position toward the distal end side in the axial direction. Part (hereinafter referred to as “movement restricting part”) 442. The moving member 44 is made of a resin such as plastic.

  The moving part main body 441 has an opening 441a for exposing the tip of the engaging member 43 at the tip, and is formed in a concavo-convex shape so that the rugged part 441b has an anti-slip function when operated. Is provided on the outer periphery. Moreover, the moving part main body 441 includes a guided part 441c guided by the guide part 115 of the barrel 10 at the base end part.

  The guided portion 441c is formed in a concavo-convex shape along the circumferential direction so as to be fitted to the guide portion 115. Thus, as the cap 4 (cap main body portion 42) is rotated around the axial direction, the guide portion 115 guides the guided portion 441c, so that the cap 4 (cap main body portion 42) is in the barrel 10 ( The axial direction is moved toward the distal end side with respect to the connecting portion 130).

  The movement restricting portion 442 protrudes radially inward from the proximal end side of the moving portion main body 441 and extends in the circumferential direction. The surface on the distal end side of the movement restricting portion 442 is formed along the radial direction, and the surface on the proximal end side of the movement restricting portion 442 is directed outward in the radial direction toward the proximal end side. It is formed in a taper shape. The movement restricting portion 442 engages with the temporary fixing portion 435 when the engaging member 43 temporarily fixes the moving member 44.

  The configurations of the cap 4, the barrel with cap, and the prefilled syringe according to the present embodiment are as described above. Next, the sealing method and the opening method of the nozzle portion 111 by the cap 4 according to the present embodiment will be described with reference to FIG. Description will be made with reference to FIG.

  First, a method for sealing the nozzle portion 111 with the sealing portion 41 will be described. First, as shown in FIG. 9, the sealing portion 41 is fixed inside the engaging member 43, and the temporary fixing portion 435 is engaged with the movement restricting portion 442, so that the moving member 44 is engaged with the engaging member. 43 is temporarily fixed.

Then, as shown in FIG. 10 (a), in a state where the moving member 44 is temporarily fixed to the engagement member 43, so that the nozzle portion 111 is inserted into the sealing body 411, the moving member 44 The engaging member 43 is pressed toward the proximal end side by the first pressing means Y inserted through the opening 441a. Thereafter, in a state where the first pressing means Y presses the engagement member 43, the second pressing means Z presses the moving member 44 toward the proximal end side as shown in FIG. 10B. .

  At this time, as the moving member 44 moves to the proximal end side in the axial direction with respect to the engaging member 43, each elastic piece 433 is elastically deformed so as to move the proximal end side radially inward. As a result, the engaging portion 434b disposed on the distal end side of each protruding portion 434 moves inward in the radial direction, so that the engaging portion 434b engages with the proximal end side of the mounting portion 133.

  In addition, since the engagement restricting portion 436 and the movement restricting portion 442 are engaged, the movement member 44 is restricted from moving in the axial direction toward the distal end side. Thereby, since the engagement part 434b can maintain the state which engages the mounting part 133, the cap 4 is mounted | worn with the barrel 10 and the sealing part 41 seals the nozzle part 111. FIG.

  Next, a method for opening the nozzle portion 111 will be described. First, when the cap 4 is rotated around the axial direction, the guide portion 115 guides the guided portion 441c, so that the cap main body portion 42 moves relative to the connecting portion 130 with the axial direction directed toward the distal end side. At this time, a part of the cap body 42 is elastically deformed as the cap body 42 moves. As a result, the engaging portion 434b is guided to the mounting portion 133 and thus moves outward in the radial direction, and the state where the engaging portion 434b engages with the mounting portion 133 is released.

  Further, when the cap main body 42 is moved toward the front end side with respect to the connection portion 130, the cap main body portion 42 is detached from the front end portion of the connection portion 130 as shown in FIG. Detach from the barrel 10. Along with this, the sealing portion 41 is also detached from the nozzle portion 111, so that the nozzle portion 111 is opened.

  By the way, when it is attempted to reattach the detached cap main body portion 42 to the connection portion 130, the reattachment prevention portion 434a of the cap main body portion 42 attaches the connection portion 130 as shown in FIG. The part 133 is locked. Therefore, the detached cap main body portion 42 cannot be attached to the connection portion 130.

  As described above, according to the cap 4 and the barrel with a cap according to the present embodiment, the cap main body portion 42 is attached to the outer peripheral portion of the connection portion 130. Then, the cap main body 42 moves away from the distal end portion of the connection portion 130 by moving the axial direction toward the distal end side with respect to the connection portion 130.

  Thereafter, since the cap main body portion 42 includes the reattachment prevention portion 434 a that locks the connection portion 130, the detached cap main body portion 42 can be prevented from being reattached to the connection portion 130. Therefore, when the nozzle part 111 is opened, the sealing part 41 can be prevented from returning to the state in which the nozzle part 111 is sealed again, so that the nozzle part 111 can be easily recognized as being opened. it can.

  In addition, according to the cap 4 and the barrel with the cap according to the present embodiment, each elastic piece 433 of the engaging member 43 is disposed along the axial direction and extends radially outward toward the proximal end side. Are arranged as follows. When the cylindrical moving member 44 disposed outside the engaging member 43 moves to the proximal end side in the axial direction with respect to the engaging member 43, each elastic piece 433 moves radially inward in the proximal end side. Therefore, the engaging portion 434 b protruding radially inward from the base end side of each elastic piece 433 moves radially inward and engages with the connecting portion 130.

As a result, the engaging member 43 engages with the connecting portion 130 via each engaging portion 434 b, so that the cap main body portion 42 is attached to the outer peripheral portion of the connecting portion 130. Further, the restricting portions 436 and 442 of the engaging member 43 and the moving member 44 restrict the moving member 44 from moving with respect to the engaging member 43 in the axial direction toward the distal end side. Accordingly, since the engagement portion 434b can be kept engaged with the connection portion 130, the cap main body portion 42 can be kept attached to the connection portion 130.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention. In addition, the configurations and methods of the plurality of embodiments described above may be arbitrarily adopted and combined (the configurations and methods according to one embodiment may be combined with the configurations and methods according to other embodiments). Further, it is of course possible to arbitrarily select configurations, methods, and the like according to various modifications described below and adopt them in the configurations, methods, and the like according to the above-described embodiments.

  For example, in the caps 2 and 4 according to the above-described embodiment, the configuration in which the sealing portions 21 and 41 and the cap main body portions 22 and 42 are separate members has been described, but the configuration is not limited thereto. Specifically, as shown in FIGS. 12 and 13, the sealing portion 611 and the cap body portion 612 may be a single member 61 that is integrally formed.

  In the barrel with a cap according to the first embodiment, a configuration in which the connecting portion 23 is provided on the cap 2 and is attached to the barrel fixing portion 114 of the barrel main body 11 will be described, and the barrel according to the second embodiment will be described. In the barrel with a cap, the configuration in which the connection portion 130 is provided on the barrel 10 and is integrally formed and fixed to the barrel main body 110 has been described, but the configuration is not limited thereto.

  For example, the connection portion may be configured to be integrally formed and fixed with the nozzle portion of the barrel main body portion, and the connection portion 62 is connected to the nozzle portion 511 of the barrel main body portion 51 as shown in FIGS. It may be configured to be mounted. That is, the connecting portion may be provided on the barrel or the cap, and in short, any configuration may be used as long as it is fixed to the barrel main body.

  Further, in the cap 2 according to the first embodiment, the sealing part 21 seals the nozzle part 111 because the inner peripheral part of the connection part 23 is separated from the elastic part 224 and the remounting prevention part 225. In this case, the configuration that can prevent the elastic portion 224 from being elastically deformed has been described, but the configuration is not limited thereto. For example, as shown in FIGS. 12 and 13, the inner peripheral portion of the connection portion 62 is in contact with the elastic portion 612 a, and the connection portion 62 does not press the elastic portion 612 a directly or indirectly. For this reason, the elastic part 612a may be configured to prevent elastic deformation.

  Here, the cap 6 and the barrel with the cap shown in FIGS. 12 and 13 will be described. The barrel with a cap according to FIGS. 12 and 13 includes a barrel 5 having a nozzle portion 511 at a distal end portion and a cap 6 attached to the barrel 5.

  The cap 6 includes a cap portion 61 that seals the nozzle portion 511 and a cylindrical connection portion 62 that is fixed to the nozzle portion 511 and that attaches the cap portion 61 to the inner peripheral portion. In addition, the cap part 61 is formed, for example with resin, such as rubber | gum, and the connection part 62 is formed with resin, such as a plastics, for example.

  The cap part 61 includes a sealing part 611 that seals the nozzle part 511, and a cylindrical cap body part 612 that arranges the sealing part 611 inside and fixes the sealing part 611. In addition, the sealing part 611 and the cap main-body part 612 are comprised by the one member integrally molded.

  The cap main body 612 is connected to the elastic portion 612a that elastically deforms in the radial direction when moving in the axial direction toward the distal end side with respect to the connecting portion 62, and is connected to the elastic portion 612a. In order to prevent reattachment, a reattachment prevention part 612b for locking the connection part 62 is provided. The elastic portion 612a protrudes in the radial direction, and the remount preventing portion 612b is disposed on the proximal end side of the elastic portion 612a.

  Then, when the cap 6 is pushed into the barrel 5 from the state shown in FIG. 12A, the nozzle portion 511 fixes the connecting portion 62 as shown in FIG. Thereby, the cap 6 is attached to the barrel 5 and the sealing portion 611 seals the nozzle portion 511. At this time, since the outer peripheral part of the cap part 61 and the inner peripheral part of the connection part 62 are formed to correspond to each other, the elastic part 612a is elastic when the sealing part 611 seals the nozzle part 511. Prevents deformation.

  Next, when the outer peripheral part of the cap part 612 and the inner peripheral part of the connection part 62 are screwed together, the cap part 61 (cap body part 612) located at the initial position faces the front end side with respect to the connection part 62. Moving. At this time, as the cap portion 61 (cap body portion 612) moves, the elastic portion 612a and the remount preventing portion 612b are pressed radially inward by the connecting portion 62, so that the elastic portion 612a is elastically deformed. To do.

  Further, when the cap portion 61 (cap body portion 612) is moved toward the distal end side with respect to the connection portion 62, the cap portion 61 (cap body portion 612) is connected to the connection portion 62 as shown in FIG. Detach from the tip of the. Along with this, the sealing portion 611 is also detached from the nozzle portion 511, and thus the nozzle portion 511 is opened. It should be noted that the screw portion disposed on the inner peripheral portion of the connecting portion 62 can be screwed with a luer lock type injection needle, an access port, or the like.

  By the way, when trying to reattach the cap part 61 (cap body part 612) that has been detached to the connection part 62, the elastic part 612a has been restored, so as shown in FIG. The mounting preventing part 612b locks the tip of the connecting part 62. Therefore, the detached cap portion 61 (cap body portion 612) cannot be attached to the connection portion 62.

  Moreover, in the cap 2 which concerns on the said 1st Embodiment, although the elastic part 224 was demonstrated the structure provided in the cap main-body part 22, it is not restricted to such a structure. For example, the structure provided in a connection part may be sufficient as an elastic part, and the structure provided in both a cap main-body part and a connection part may be sufficient respectively.

  The cap according to the first embodiment may be configured such that the remounting prevention portion of the cap body portion is screwed with the connection screw portion 233 of the connection portion 23.

  Moreover, in the cap 4 which concerns on the said 2nd Embodiment, although the structure provided with eight elastic pieces 433 ... was demonstrated, it is not restricted to such a structure. For example, one elastic piece 433 may be provided, may be provided with two to seven elastic pieces, or may be provided with nine or more elastic pieces.

  In the cap 4 according to the second embodiment, the configuration in which the restricting portions 436 and 442 are provided on both the engaging member 43 and the moving member 44 has been described. However, the configuration is not limited thereto. For example, the restricting portion may be provided only on the engaging member, or may be provided only on the moving member.

  DESCRIPTION OF SYMBOLS 1 ... Barrel, 2 ... Cap, 3 ... Plunger, 4 ... Cap, 5 ... Barrel, 6 ... Cap, 10 ... Barrel, 11 ... Barrel body part, 21 ... Sealing part, 22 ... Cap body part, 23 ... Connection part 31 ... Gasket, 32 ... Plunger rod, 41 ... Sealing part, 42 ... Cap body part, 43 ... Engagement member, 44 ... Moving member, 51 ... Barrel body part, 61 ... Cap part, 62 ... Connection part, 110 ... barrel body part, 111 ... nozzle part, 130 ... connection part, 224 ... elastic part, 225 ... remount prevention part, 433 ... elastic piece, 434a ... remount prevention part, 434b ... engagement part, 436 ... restriction part, 442 ... Restriction part, 511 ... Nozzle part, 611 ... Sealing part, 612 ... Cap body part, 612a ... Elastic part, 612b ... Re-mounting prevention part, X ... Filling

Claims (5)

A sealing part for sealing the nozzle part provided at the tip part of the barrel body part, a cylindrical cap body part for arranging the sealing part inside and fixing the sealing part, and a tip part of the barrel body part And a cylindrical connecting portion for mounting the cap main body portion on the inner peripheral portion,
The cap main body portion includes a cap screwing portion that is screwed to the connection portion at the base end portion, and an elastic portion that is elastically deformable, and is to be separated from the distal end portion of the connection portion with respect to the connection portion. It is configured to be movable with the axial direction facing the tip ,
The connection portion is disposed at the distal end portion, and the threaded portion screwed connecting screwed portion, is disposed on the base end portion, a connecting fixing portion fixed to the distal end of the barrel main body, Ru includes a cap Because
The cap body part includes a remounting prevention part that locks the connection part to prevent the cap body part connected to the elastic part and detached from being reattached to the connection part ,
The connection portion includes a midway portion between the connection screwing portion and the connection fixing portion,
The elastic part and the remount prevention part are arranged so that the elastic part does not elastically deform when the sealing part seals the nozzle part in the middle part in a state where the cap screw part and the connection screw part are screwed together. position to cap and said Rukoto. The cap according to claim 1 , wherein the elastic portion is configured to elastically deform radially inward when the cap main body portion moves in the axial direction toward the distal end side with respect to the connection portion. A sealing part for sealing the nozzle part provided at the tip part of the barrel main body part, and a cylindrical cap main body part for fixing the sealing part while arranging the sealing part inside,
Cap body, as well is mounted on the outer peripheral portion of the cylindrical connecting portion provided at the distal end portion of the barrel main body portion, to be disengaged from the distal end portion of the connecting portion, the axially distal end side to the connecting portion A cap configured to be movable toward the
The cap body portion includes an engaging member that engages with the connecting portion and a cylindrical moving member that is disposed outside the engaging member so as to be attached to the connecting portion.
The engaging member is disposed along the axial direction and is elastically deformable radially inward, an engagement restricting portion disposed on an outer peripheral portion of the elastic piece, and disposed on a proximal end side of the elastic piece. A re-mounting prevention portion that locks the connecting portion on the base end side to prevent the cap main body portion from being remounted on the connecting portion after being detached from the distal end portion of the connecting portion. And a protruding portion having an engaging portion that engages with the connecting portion in a state of protruding radially inward from the proximal end side of the elastic piece and elastically deforming the elastic piece radially inward, With
The moving member includes a movement restricting portion disposed on the base end side, and the elastic piece, the engagement restricting state from the exposed state in which the elastic piece, the engaging restricting portion, and the protruding portion are exposed with respect to the engaging member. Part, and configured to be movable in the axial direction toward the base end side to the accommodated state in which the projecting part is accommodated,
In the exposed state,
The elastic piece is disposed so as to expand radially outward toward the base end side, and the protruding portion is disposed outside the mounting portion disposed on the outer peripheral portion of the connection portion,
In the containment state,
The elastic piece is elastically deformed radially inward to reduce the diameter, and the engagement restricting portion and the movement restricting portion restrict the movement member from moving in the axial direction toward the distal end side with respect to the engaging member. The engaging portion engages with the mounting portion so as to be guided radially outward, and the re-mounting prevention portion is mounted after the cap body portion is detached from the distal end portion of the connecting portion. A cap characterized in that the tip end side of the portion can be locked . A barrel with a cap, wherein the cap according to any one of claims 1 to 3 is attached to a tip portion. A prefilled syringe comprising: the barrel with a cap according to claim 4; and an elastic gasket inserted into the barrel main body so as to seal the filler filled in the barrel main body.

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