JP4710618B2 - Tube clamp device - Google Patents

Description

  The present invention relates to a tube clamp device that is used to sandwich a flexible tube and close the lumen thereof or to adjust the cross-sectional area of the tube lumen.

  In transfusion or blood transfusion, drug solution or blood is sent from the transfusion bag or transfusion bag to the patient using a flexible tube. For example, in peritoneal dialysis therapy, a silicone rubber peritoneal catheter is implanted in the peritoneal cavity of a dialysis patient, and peritoneal dialysate is introduced into and discharged from the peritoneal cavity through a transfer tube (extension tube) connected to the peritoneal catheter. I do. The transfer tube is equipped with a tube clamp for closing the tube so that the peritoneal dialysate stored in the abdominal cavity does not leak.

  Conventionally, as a generally used tube clamp, for example, as described in Patent Document 1, there is one in which a roller that functions as a pressing member for closing a tube is mounted in a housing so as to be movable. . When the position is changed by rotating the roller with a finger, the clearance with the bottom surface of the housing changes according to the position of the roller, and a state where the tube is closed and a state where the tube is opened is obtained.

Further, Patent Document 2 describes a tube clamp that is similar to Patent Document 1 in its action of clamping a tube, but has been improved so that it can be easily operated. In other words, the housing has a structure in which a movable pressing member and a lever-like operation member for moving the pressing member are mounted in combination in place of the roller. There is no need to directly operate the pressing member with a finger, and the operating member is rotated with the mounting position on the housing as a support shaft. The trajectory of rotation of the end of the operating member is set so as to intersect the end of the pressing member, and the end of the operating member abuts on the end of the pressing member at the intersecting position to clamp the tube. The pressing member is moved in the direction. The clamp operation can be easily and reliably performed with a small force by operating the operation member rather than operating the pressing member itself.
JP-A-55-72986 Japanese Patent Laid-Open No. 7-100207

  In the case of the structure in which the roller described in Patent Document 1 is operated with a finger, a force is required for the operation of rotating the roller and moving it in a linear direction, and it is difficult to perform a delicate operation. In order to reduce the operating force and improve the operability, it is necessary to increase the diameter of the roller. On the other hand, in order to reliably close the tube with a small pressing force, it is advantageous that the roller diameter is small. Therefore, in the structure described in Patent Document 1, the structural contradiction becomes an obstacle to improve the ease of operation and the certainty of the blocking action at the same time.

  On the other hand, the operability is improved by using the structure of Patent Document 2. However, since the pressing member is moved by contact with the rotation of the end of the operating member, the pressing member needs to have a certain size to some extent in order to ensure a sufficient amount of movement. Therefore, the structure is inappropriate for reducing the size of the pressing member and obtaining a reliable closing action with a small force. Further, since the pressing member does not rotate, when the pressing member is moved to obtain a blocking action, a state in which the pressing member slides with respect to the tube occurs. Therefore, the damage to the tube may increase due to friction.

  In any structure, since it is difficult to confirm the distinction between the open state and the closed state of the tube, an unexpected accident may occur.

  In view of the above, an object of the present invention is to provide a tube clamp device that is easy to operate and can easily distinguish between an open state and a closed state of a tube.

The tube clamp device of the present invention includes a housing having a lumen that penetrates in the front-rear direction and allows an infusion tube to pass therethrough, and an upper window formed by opening the lumen, and an upper surface is exposed in the upper window. A slider mounted on the housing so as to be linearly movable in the front-rear direction of the cavity, a base portion disposed facing the upper window and rotatably supported by the housing, and extending from the pivot fulcrum A clamp member that is bent from the tip of the base portion toward the lumen of the housing, and a clamp member in which the tip of the clamp head rotates inward and outward of the lumen as it rotates. the provided, the right and left inner surface of the side wall of said lumen, said guide grooves extending in the back and forth along the upper window direction are formed, the clamping member has associated groove on the side surface of the base portion, the slider is the guide And an inward projection that is positioned outward from the pivot fulcrum of the clamp member is provided at the end of the clamp member at the end of the clamp member. And an inward projection of the slider engages with the linkage groove of the clamp member to form a linkage portion. As the slider moves linearly , through the engagement at the linkage portion, The linear movement is converted into rotation of the clamp head.

According to the tube clamp device having the above configuration, the tube can be easily clamped via the linkage between the slider and the clamp member by moving the slider exposed in a large area in plan from the upper window. Improve. In addition, since the state of the clamp member with respect to the upper window is clearly different between the open state and the closed state, the open / close state is highly visible, and the open / close state can be grasped by touching a finger.

  In the tube clamp device of the present invention, preferably, in a state where the rotation position of the clamp member is at the outer end, the upper surface of the clamp member protrudes outward from the upper window, and the rotation position of the clamp member is the inner position. In the state which exists in a direction end, it comprises so that the upper surface of the said clamp member may be accommodated in the said upper window. According to this configuration, it becomes easier to distinguish between the state in which the clamp member protrudes from the housing and the state in which the clamp member is accommodated in the housing by visual recognition or the sense of touch of a finger.

  Preferably, in a state where the rotation position of the clamp head is at the inner end, the end of the clamp head is closer to the linkage groove than the rotation fulcrum of the clamp member in the longitudinal direction of the lumen. And closer to the engagement position of the inward projection.

  According to this structure, even if the force which pushes back to the front-end | tip of a clamp head acts with the repulsive force from the clamped infusion tube etc., a clamp state is hard to be cancelled | released and it can hold | maintain a clamp state stably.

  Moreover, it is preferable that the said clamp member has a color different from the said housing and the said slider. Thereby, the visibility of the operation state of the clamp member, that is, the open / close state of the clamp can be enhanced.

  Hereinafter, a tube clamp device according to an embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a perspective view of a tube clamp device according to an embodiment of the present invention. In addition, the figure shows the tube clamp apparatus in a tube open state. 2 is a plan view thereof, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is an exploded perspective view of the tube clamp device.

  This tube clamp device is composed of a housing 1, a slider 2, and a clamp member 3.

  The housing 1 has a lumen 4 penetrating in the front-rear direction. The lumen 4 is formed so that a tube forming a flow path such as an infusion tube 5 (see FIG. 3) can be inserted. On the upper surface of the housing 1, there is an upper window 6 formed by opening the lumen 4. The slider 2 is mounted on the housing 1 so that its upper surface is exposed at the upper window 6 of the housing 1 and can move linearly in the front-rear direction of the lumen 4. The clamp member 3 is disposed so as to face the upper window 6 and is rotatably supported by the housing 1. The clamp member 3 includes a base body portion 3 a extending from the rotation fulcrum, and a clamp head 3 b formed by bending from the tip of the base body portion 3 a toward the inner cavity 4 of the housing 1. Along with the rotation of the base body portion 3 a, the tip of the clamp head 3 a rotates in the inner and outer directions of the lumen 4.

  The clamp member 3 has a linkage groove 7 on the side surface of the base portion 3a. The slider 2 has an inward projection 8 at the end on the clamp member 3 side, and the inward projection 8 is engaged with the linkage groove 7 of the clamp member 3. By the engagement of the linkage groove 7 and the inward projection 8, a linkage portion between the clamp member 3 and the slider 2 is formed. Thereby, along with the linear movement of the slider 2, the linear movement of the slider 2 is converted into the rotation of the clamp head 3 b through the engagement of the linkage groove 7 and the inward protrusion 8. That is, when the slider 2 is linearly moved in the front-rear direction, the tip of the clamp head 3 b is pushed toward the inside of the lumen 4 through the upper window 6 or pulled out from the upper window 6. 1 to 3 show a state in which the tip of the clamp head 3b is pulled out from the upper window 6. FIG. In this state, the slider 2 is positioned on the side farthest from the clamp member 3, and the tip 3c of the clamp head 3b does not press the infusion tube 5, as shown in the sectional view of FIG. The lumen of the infusion tube 5 is open.

  As shown in FIG. 3, guide grooves 9 extending in the front-rear direction along the upper window 6 are formed on the inner surfaces of the left and right side walls of the lumen 4. In FIG. 3, the slider 2 includes an operation portion 2 a that is exposed from the upper window 6 and has an inward projection 8 formed therein, and a sliding portion 2 b that is located in the inner cavity 4 and in which a restriction projection 10 is formed. The restricting protrusion 10 engages with the guide groove 9, whereby the movement of the slider 2 is restricted to a linear movement in the front-rear direction. The overall structure of the slider 2 is clearly shown in the exploded perspective view of FIG. The clamp member 3 has a support shaft 11 at the base end portion of the base portion 3a. The support shaft 11 is fitted into a fitting hole 12 provided in the vicinity of the upper window 6 on the side wall of the housing 1 to form a rotation fulcrum, whereby the clamp member 3 is rotatably supported by the housing 1. Yes. The inward projection 8 of the slider 2 is located on the outer side with respect to the fitting hole 12, that is, the position of the rotation fulcrum of the clamp member 3. Accordingly, when the slider 2 is moved in a direction away from the clamp member 3, the tip 3 c of the clamp head 3 b is rotated in a direction to be pulled out from the upper window 6.

  5 to 7 show a state in which the infusion tube 5 is closed by the tube clamp device having the above-described configuration. 5 is a perspective view thereof, and FIG. 6 is a plan view thereof. FIG. 7 shows a BB cross section in FIG.

In this state, the slider 2 is slid to the clamp member 3 side. Therefore, as shown in FIG. 7, the inward projection 8 of the slider 2 is connected to the link groove 7 of the base portion 3 a of the clamp member 3.
On the other hand, it is located at the farthest end from the support shaft 11. As a result, the tip 3c of the clamp head 3b is pushed most deeply into the lumen 4 and presses the infusion tube 5 to close the lumen.

  As shown in FIG. 7, when the pivot position of the clamp head 3 b is at the inner end, the clamp head 3 b with respect to the support shaft 11 (rotation fulcrum) of the clamp member 3 in the front-rear direction of the lumen 4. The front end 3c of the inner side is configured so as to be closer to the engagement position between the linkage groove 7 and the inward projection 8. According to such a positional relationship, even if a force that pushes back the tip 3c of the clamp head 3b is applied by the repulsive force from the infusion tube 5, the force that is applied to the slider 2 to release the clamped state is slight. is there. Therefore, the clamped state can be stably held.

  As described above, the tube clamp device according to the present embodiment is shown in FIGS. 5 to 7 by inserting the infusion tube 5 into the lumen 4 and sliding the operation tube 2a of the slider 2 with a finger pressed. By positioning the slider 2 in the closed state, the lumen of the infusion tube 5 is closed and a clamped state is established. On the other hand, by positioning the slider 2 in the state shown in FIGS. 1 to 3, the lumen of the infusion tube 5 is opened and the clamped state is released. Thus, since the change of the state can be operated by the parallel movement of the slider 2, it can be easily operated with a light force compared to the case of operating a small-diameter roller as in the conventional example.

  1 to 3, the clamp member 3 is exposed from the upper window 6, and in the closed state of FIGS. 5 to 7, the area where the clamp member 3 is exposed from the upper window 6 is extremely small. Therefore, the open state and the closed state can be easily visually confirmed. Moreover, even if it does not visually recognize, a state can be recognized by the touch of a finger. Such state recognizability is further improved by the following features of the present embodiment. That is, in the open state of FIGS. 1 to 3, the upper surface of the clamp member 3 protrudes from the upper window 6, and in the closed state of FIGS. 5 to 7, the upper surface of the clamp member 3 is accommodated in the upper window 6. As described above, according to the present embodiment, the presence or absence of a portion protruding from the housing 1 can be easily sensed visually or by touching a finger, so that the open / close state of the clamp can be easily recognized.

  For example, this is effective because peritoneal dialysis patients are often blind. Since the clamp is disposed near the abdomen during peritoneal dialysis, it is convenient for operation to recognize the protrusion of the clamp member 3 by touch. Moreover, visibility can also be further improved by giving the clamp member 3 coloring different from the surrounding part.

  For example, if the housing 1 and the slider 2 are light colors such as white and the clamp member 3 is red, yellow, etc., the clamp member 3 can be distinguished from the housing 1 and the slider 2 with a clear color contrast. It becomes easy to recognize the open / closed state of. In addition, if the clamp member 3 is colored red, yellow, etc., it is displayed as a warning display or a color for calling attention, which is more effective for improving visibility. The housing 1 and the slider 2 may have different colors. Furthermore, if the open / closed state can be recognized based on the color of the clamp, the open / closed state can be recognized not only for the patient but also for medical staff and caregivers who monitor the patient. A clamp device can be provided.

  Furthermore, according to the tube clamp device in the present embodiment, when the tip 3c of the clamp head 3b is pushed into the lumen 4 and presses the infusion tube 5 to close the lumen, the infusion tube 5 is It only squeezes substantially laterally. Therefore, the amount of the infusion present in the lumen of the infusion tube 5 moves along with the clamping operation is small, and the infusion is not pushed out to the distal end side of the patient-side connector and does not leak. On the other hand, in the case of a structure in which the flow path is closed by moving the conventional roller in the front-rear direction, when the infusion tube is closed, the infusion in the tube may leak from the patient-side connector tip, which is unsanitary. .

  The tube clamp device of the present invention is easy to operate, can easily distinguish between an open state and a closed state of the tube, and is useful for use in infusion and blood transfusion.

The perspective view in the tube open state of the tube clamp apparatus in embodiment of this invention Plan view of the tube clamp device Sectional drawing which shows the AA cross section in FIG. 2 of the tube clamp apparatus Exploded perspective view of the tube clamp device The perspective view in the tube blockage state of the tube clamp device Plan view of the tube clamp device Sectional drawing which shows the BB cross section in FIG. 6 of the tube clamp apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Slider 2a Operation part 2b Sliding part 3 Clamp member 3a Base | substrate part 3b Clamp head 4 Lumen 5 Infusion tube 6 Upper window 7 Linking groove 8 Inner protrusion 9 Guide groove 10 Restriction protrusion 11 Support shaft 12 Fitting hole

Claims (4)

A housing having a lumen penetrating in the front-rear direction and capable of being inserted through an infusion tube, and an upper window formed by opening the lumen;
A slider mounted on the housing so that the upper surface is exposed in the upper window and is linearly movable in the front-rear direction of the lumen;
A base portion that is disposed facing the upper window and is rotatably supported by the housing, and is formed by bending from a tip of the base portion toward the lumen of the housing. A clamp member, and a clamp member in which a tip of the clamp head rotates in an inner and outer direction of the lumen with rotation,
Guide grooves extending in the front-rear direction along the upper window are formed on the inner surfaces of the left and right side walls of the lumen,
The clamp member has a linking groove on a side surface of the base portion,
The slider engages with the guide groove and is guided so that its movement is regulated by the linear movement in the front-rear direction, and at the end on the clamp member side, outward from the rotation fulcrum of the clamp member. Having an inward projection located,
An inward projection of the slider engages with the linkage groove of the clamp member to form a linkage portion;
The tube clamp device according to claim 1, wherein the linear movement of the slider is converted into the rotation of the clamp head through the engagement of the linkage part with the linear movement of the slider.   When the pivot position of the clamp member is at the outer end, the upper surface of the clamp member protrudes outward from the upper window, and when the pivot position of the clamp member is at the inner end, The tube clamp device according to claim 1, wherein an upper surface is accommodated in the upper window.   In a state where the pivot position of the clamp head is at the inner end, the tip of the clamp head is closer to the linkage groove and the inner protrusion with respect to the pivot fulcrum of the clamp member in the longitudinal direction of the lumen. The tube clamp device according to claim 1, wherein the tube clamp device is configured so as to be closer to the engagement position. The tube clamp device according to any one of claims 1 to 3 , wherein the clamp member has a color different from that of the housing and the slider.

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