JP2011110249A - Tube clamping device for blood purifier and blood purifier including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube clamping device for a blood purifier for easily clamping a flexible tube to be used in the blood purifier, and also to provide the blood purifier including the device. <P>SOLUTION: The tube clamping device for a blood purifier includes: a base portion 1; a clamping portion 2 which is rockably supported with a rocking axis L formed in the base portion 1 as a center and also has a clogging part 2a for performing clogging in a closed state with respect to the base portion 1; a torsion spring 3 which normally energizes the clamping portion 2 in a direction for the closed state; and an inclination surface 4 which is formed on the outer surface of the clogging part 2 in the clamping portion 2, rocks the clamping portion 2 against the energizing force of the torsion spring 3 when the flexible tube C is pressurized in the closed state of the clamping portion 2, and then, permits the fit-in of the flexible tube C with respect to the clamping portion 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tube gripping device for a blood purification device for gripping a flexible tube used in a blood purification device for blood purification treatment, and a blood purification device including the same.

  As a flexible tube used in a hemodialysis apparatus (blood purification apparatus) for hemodialysis treatment, for example, a blood circuit for circulating a patient's blood extracorporeally can be mentioned. This blood circuit is mainly composed of an arterial blood circuit in which an arterial puncture needle for collecting blood from a patient is attached to the tip, and a venous blood circuit in which a venous puncture needle for returning blood to the patient is attached to the tip. The dialyzer is interposed between the arterial blood circuit and the venous blood circuit to purify blood circulating outside the body.

  2. Description of the Related Art Conventionally, a tube gripping device for a blood purification device for gripping the blood circuit during hemodialysis treatment has conventionally been provided with a base portion having a fitting groove into which a part of the blood circuit is fitted, and is openable and closable with respect to the base portion. And a cover portion that can grip a part of the blood circuit inserted in the insertion groove in the closed state. In order to perform the gripping operation, it is necessary to open the cover portion, insert a part of the blood circuit (flexible tube) along the insertion groove, and close the cover again. In addition, since this prior art does not relate to the literature known invention, there is no prior art document information to be described.

  However, in the above conventional tube gripping device for blood purification apparatus, a plurality of steps including opening the cover, inserting the flexible tube (a part of the blood circuit) into the insertion groove, and closing the cover again are performed. Workability deteriorates, and it is necessary to work with both hands in each process, and gripping work is not possible in the state where another hand (such as a blood circuit to be grasped) is held in one hand. There was a problem that it would be difficult.

  The present invention has been made in view of such circumstances. A tube cleaning device for a blood purification device that can easily grip a flexible tube used in a blood purification device, and a blood purification device including the same. It is to provide.

  The invention according to claim 1 comprises a base portion and a closing portion that can be brought close to or separated from the base portion, and closes and closes by being close to the base portion, In addition, a gripping portion that can be gripped by inserting the flexible tube in the closed state, a biasing means that constantly biases the gripping portion in a direction in which the gripping portion is closed, and an outer surface of the closing portion of the gripping portion are formed. If the flexible tube is pressed when the gripping portion is in the closed state, the gripping portion is separated from the base portion while receiving the pressing force and resisting the biasing force of the biasing means. It is characterized by comprising a sloped surface that allows a pressing force to be applied and allows the flexible tube to be inserted into the gripping portion.

  The invention according to claim 2 is the tube gripping device for blood purification apparatus according to claim 1, wherein the gripping portion is supported so as to be swingable about a swing shaft formed in the base portion, and The swinging shaft of the gripping part is formed at the same height as the center of the flexible tube fitted in the base part or at a position lower than the center of the flexible tube.

  The invention according to claim 3 is the tube gripping device for blood purification device according to claim 1 or 2, wherein the inner surface of the closing portion of the gripping portion extends in a substantially vertical direction with respect to the base portion or Inclined and extended in the same direction as the inclined surface.

  According to a fourth aspect of the present invention, in the tube gripping device for a blood purification device according to the third aspect, the inner surface of the closing portion of the gripping portion is formed with a concave portion that follows the outer peripheral surface of the flexible tube. It is characterized by that.

  A fifth aspect of the present invention is a blood purification apparatus comprising the tube gripping device for a blood purification apparatus according to any one of the first to fourth aspects.

  According to the invention of claim 1, when the gripping portion is in the closed state, the gripping portion can be moved and the flexible tube can be fitted by simply pressing the flexible tube against the inclined surface. After the insertion, the gripping portion is automatically closed by the biasing force of the biasing means, so that the flexible tube used in the blood purification apparatus can be easily gripped.

  According to a second aspect of the present invention, the swing shaft of the grip portion is substantially the same height as the center of the flexible tube fitted between the base portion and the grip portion or the center of the flexible tube. Since it is formed at a lower position, even if a force is applied to the flexible tube in the direction to release the grip by the grip portion, the grip portion is prevented from swinging, and the flexible tube It is possible to avoid accidental disconnection.

  According to the invention of claim 3, since the inner surface of the closing portion of the grip portion extends in a substantially vertical direction with respect to the base portion or extends in the same direction as the inclined surface, the flexible tube Can be reliably prevented from coming off accidentally.

  According to the fourth aspect of the present invention, the inner surface of the closing portion of the gripping portion is formed with a concave portion that follows the outer peripheral surface of the flexible tube. While avoiding more reliably, a flexible tube can be hold | gripped in a more stable state.

  According to invention of Claim 5, the blood purification apparatus provided with the tube gripping device for blood purification apparatuses which produces the effect of Claims 1-4 can be provided.

The perspective view which shows the tube holding apparatus for blood purification apparatuses which concerns on embodiment of this invention. Side view showing tube holding device for blood purification apparatus Front view showing tube holding device for blood purification apparatus Sectional view along line IV-IV in FIG. VV line sectional view in FIG. Side view showing the gripping process of the blood purification device tube gripping device The side view which shows the state at the time of the releasing of the holding | grip of the tube holding device for blood purification apparatuses The schematic diagram which shows what the inner peripheral surface of the obstruction | occlusion part extended in the substantially perpendicular direction with respect to the base in the tube holding | grip apparatus for blood purification apparatuses The schematic diagram which shows what the inner peripheral surface of the obstruction | occlusion part in the tube holding | grip apparatus for blood purification apparatuses was inclined and extended in the same direction as the gradient surface The schematic diagram which shows what the recessed part was formed in the internal peripheral surface of the obstruction | occlusion part in the tube holding apparatus for blood purification apparatuses A three-side view showing a state in which the tube holding device for the blood purification apparatus is fixed to the operation panel of the blood purification apparatus The front view and side view which show the tube holding | grip apparatus (thing without an insertion groove | channel) for blood purification apparatuses which concern on other embodiment of this invention. XIII-XIII line sectional view in FIG. Sectional drawing which shows the tube holding | grip apparatus (thing with which the through-hole was formed) for blood purification apparatuses which concerns on other embodiment of this invention. The front view and side view which show the tube holding device for the blood purification apparatus of the state which assembled | attached the clamp apparatus for clamping a flexible tube XVI-XVI sectional view in FIG. 15 (state before clamping) XVI-XVI line sectional view in FIG. 15 (state after clamping) A front view and a side view showing a tube gripping device for a blood purification apparatus according to another embodiment of the present invention (having a contact detection sensor S1). XIX-XIX sectional view in FIG. 18 (state before gripping) XIX-XIX line sectional view in FIG. 18 (state of gripping process) XIX-XIX line sectional view in FIG. 18 (state after gripping) Sectional drawing which shows the tube holding | grip apparatus (thing provided with contact detection sensor S2) for blood purification apparatuses which concerns on other embodiment of this invention. A front view and a side view showing a tube gripping device for a blood purification apparatus according to another embodiment of the present invention (having a contact detection sensor S3) XXIV-XXIV sectional view and enlarged view in FIG. XXV-XXV cross-sectional view in FIG. 23 (state in which a flexible tube is gripped) XXV-XXV sectional view in FIG. 23 (the state where the flexible tube is not gripped) XXV-XXV sectional view in FIG. 23 (the gripping portion is in an open state)

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The tube gripping device for a blood purification apparatus according to this embodiment is a flexible tube (for example, a blood purification apparatus for blood purification treatment (more specifically, a hemodialysis apparatus for hemodialysis treatment)). A blood circuit for circulating the patient's blood extracorporeally, a tube connected to the blood circuit, etc.), as shown in FIGS. It is mainly composed of a torsion spring 3 as a biasing means (see FIGS. 4 and 5), an inclined surface 4 and an inner surface 5.

  The base portion 1 is composed of a plate-like member that can be fixed to a desired portion, and a convex portion 1a is formed on the upper surface, and the flexible tube C can be fitted into the convex portion 1a by extending in a substantially horizontal direction. A fitting groove 1b is formed. That is, as shown in FIG. 6, the fitting groove 1 b has a groove shape that opens in the horizontal direction, and the groove shape is dimensioned to allow the flexible tube C to be fitted therein. Further, an inclined surface 1aa is formed on the insertion side (left end side in FIG. 2) of the flexible tube C in the convex portion 1a, and both the inclined surface 1aa and the gradient surface 4 described later are flexible. The sex tube C can be inserted more. As shown in FIGS. 12 and 13, the fitting groove 1 b may not be formed.

  The grip 2 is supported so as to be swingable (adjacent or separable) about a swing shaft L formed on the base 1 and closed with respect to the base 1 (the state shown in FIG. 2). The closed portion 2a for closing the insertion groove 1b (strictly, the opening side of the insertion groove 1b) is provided, and the flexible tube C inserted into the insertion groove 1b in the closed state can be gripped. . Specifically, a concave portion K is formed at a position corresponding to the flexible tube C inserted into the insertion groove 1b in the grip portion 2, and when the grip portion 2 is closed, the closed portion The flexible tube C can be held between the inner surface 5 of 2a and the recess K formed continuously from the inner surface 5 and the insertion surface of the insertion groove 1b.

  In addition, a long hole 2c into which a protruding portion 1c that protrudes from the convex portion 1a of the base portion 1 to the side is fitted is formed on the side surface of the holding portion 2, and the holding portion 2 swings. When swinging about the axis L, the protrusion 1c can slide along the inner peripheral surface of the elongated hole 2c. As a result, the swing end of the grip portion 2 is set, and guidance when the grip portion 2 swings is performed. Further, as shown in FIG. 7, an operation portion 2 b that protrudes upward and can be pressed by a worker with a finger is formed on the upper surface of the grip portion 2.

  The torsion spring 3 (biasing means) is attached to the swing shaft L, and one end is fixed to the base portion 1 side (fixed side) while the other end is fixed to the grip portion 2 side (movable side). Thus, the torsion spring 3 is always urged in the direction in which the grip portion 2 is closed. Instead of the torsion spring 3, other urging means (such as another form of spring or an elastic body capable of applying an urging force) that constantly urges the grip portion 2 in the closed state may be used. Good.

  Here, in the present embodiment, a slope surface 4 is formed on the outer surface of the closing portion 2a of the grip portion 2 and is inclined by α (see FIG. 2) from the vertical surface. The inclined surface 4 is attached to the torsion spring 3 when the flexible tube C is pressed when the grip portion 2 is closed (that is, when the closing portion closes the insertion groove 1b). The pressing force is applied in the direction in which the grip portion 2 is swung while resisting the force, and the insertion of the flexible tube C into the insertion groove 1b can be allowed.

  More specifically, as shown in FIG. 6 (a), when the flexible tube C is pressed in the direction of the arrow in FIG. The pressure acts as a force in the swinging direction of the gripping portion 2, and the gripping portion 2 is centered on the swinging shaft L against the biasing force of the torsion spring 3 as shown in FIG. It swings in the direction of the arrow in the figure. If the flexible tube C is continuously pressed as it is, the flexible tube C is inserted into the insertion groove 1b, and the grip portion 2 is closed by the urging force of the torsion spring 3 as shown in FIG. Swings automatically to the state.

  That is, in the gripping work, it is sufficient for the operator to press the flexible tube C to be gripped against the gradient surface 4, and other separate operations are unnecessary. In particular, in this embodiment, since the inclined surface 1aa is formed on the convex portion 1a, the flexible tube C can be fitted more easily and smoothly. In the gripping state, as described above, the closing portion 2a closes the open side (left side in FIG. 6) of the insertion groove 1b to prevent it from coming off, and between the recess K and the insertion surface of the insertion groove 1b. The flexible tube C is gripped.

  Thus, in the present embodiment, as shown in FIG. 2, the swing axis L (axial center) of the grip portion 2 is the center of the flexible tube C inserted into the insertion groove 1 b of the base portion 1. It is set to substantially the same height (height dimension with respect to the base portion 1). Thereby, even if a force is applied to the flexible tube C in the direction in which the gripping portion 2 releases the grip (left side in FIG. 2), the gripping portion 2 is prevented from swinging, and flexible. It can be avoided that the sex tube C is inadvertently detached from the insertion groove 1b.

  In the present embodiment, the swing axis L (axial center) of the grip portion 2 is set at substantially the same height as the center of the flexible tube C inserted into the insertion groove 1 b of the base portion 1. However, instead of this, the swing axis L of the grip portion 2 may be formed at a position lower than the center of the flexible tube C inserted into the insertion groove 1 b of the base portion 1. Even in this case, even if a force is applied to the flexible tube C in the direction of releasing the grip by the grip portion 2 (left side in FIG. 2), the grip portion 2 is prevented from swinging. And it can avoid that the flexible tube C will remove | deviate from the insertion groove | channel 1b carelessly.

  However, in order to release the gripping, as shown in FIG. 7, the operator presses the operation portion 2 b to swing the gripping portion 2. Thereby, since the open side of the insertion groove 1b is opened again, if the flexible tube C is pulled to the open side, it can be removed from the insertion groove 1b. That is, according to this embodiment, the flexible tube C can be gripped with one touch, and the gripping of the flexible tube C can be prevented from being inadvertently released.

  Therefore, when the grip portion 2 is in the closed state, simply pressing the flexible tube C against the sloped surface 4 causes the grip portion 2 to swing and insert the flexible tube C into the insertion groove 1b. In addition, since the grip portion 2 is automatically closed by the urging force of the torsion spring 3 (the urging means) after the insertion, the flexible tube C used in the hemodialysis apparatus (blood purification apparatus) can be easily formed. Can be gripped.

  Further, as shown in FIG. 8, the inner surface of the closing portion 2 a of the grip portion 2 is an extension (inner surface 5 ′) extending in a substantially vertical direction (up and down direction in the figure) with respect to the base portion 1. Alternatively, or as shown in FIG. 9, the inclined surface 4 is inclined in the same direction (when pressed by the gripped flexible tube C, it is inclined in the direction in which the grip portion 2 is closed) and is extended. In this way, the inner surface of the closing portion 2a of the grip portion 2 extends substantially perpendicular to the base portion 1 or is inclined in the same direction as the inclined surface 4. If it is extended, the flexible tube C can be more reliably avoided from inadvertently detaching from the fitting groove 1b.

  Furthermore, you may make it form the recessed part 5a of the shape (arc shape) which followed the outer peripheral surface of the flexible tube C, as shown in FIG. By forming the recess 5a, it is possible to more reliably avoid the flexible tube C from being inadvertently detached from the fitting groove 1b, and the gripped flexible tube C can be removed from the recess 5a. Therefore, the flexible tube C can be gripped in a more stable state.

  Although the present embodiment has been described above, the present invention is not limited to this, and other blood purification treatments, for example, those that hold a flexible tube used in a hemodialysis apparatus for hemodialysis treatments. You may apply to the thing which hold | grips the flexible tube used with the blood purification apparatus (For example, the blood filtration dialysis method, the blood filtration method, the blood purification apparatus used by AFBF, a plasma adsorption apparatus, etc.). In addition, as applied to the blood purification apparatus, as shown in FIG. 11, the blood purification apparatus may be fixed to an operation panel P provided in the blood purification apparatus.

  Further, as shown in FIG. 14, the base portion 1 is provided with a through hole 1 d provided through the front and back surfaces of the base portion 1, and as shown in FIGS. 15 and 16, the through hole The clamp portion 7 that can be inserted into 1d, the solenoid 8, and the clamp portion 7 are connected and integrated, and the solenoid 8 is energized to move upward in the figure to move the clamp portion 7 in the same direction. The clamping device 6 including the obtained iron core 9 may be assembled.

  That is, in a state where the flexible tube C is gripped by the grip portion 2, by energizing the solenoid 8, the iron core 9 is moved upward in the drawing as shown in FIG. 7 is also moved in the same direction. Thereby, the clamp part 7 moves upward via the through-hole 1d, and the clamp (blockage of the flow path) is performed by pressing the flexible tube C gripped by the grip part 2 at the tip thereof. It becomes. Thus, the tube gripping device can be used as a tube clamping device.

  On the other hand, as shown in FIGS. 18 and 19, a thin contact detection sensor S <b> 1 is provided at a contact portion of the base portion 1 that can come into contact with the grip portion 2 in a state where the grip portion 2 is normally closed. Also good. In this case, as shown in FIG. 20, after opening the grip portion 2 to grip the flexible tube 20 (at this time, there is no detection by the contact detection sensor S1), as shown in FIG. When the flexible tube 20 is satisfactorily accommodated in the recess K and the grip portion 2 is normally closed, the contact detection sensor S1 can detect it, and thus it is detected whether or not the grip portion 2 is normally closed. can do. According to such a configuration, by including the contact detection sensor S1 that detects that the grip portion 2 is not completely closed, the possibility that the flexible tube C may accidentally fall off is reduced, and the safety is further improved. Can be improved.

  Further, in a state where the grip portion 2 is normally closed, a thin contact detection sensor S2 is provided at a contact portion of the base portion 1 that can come into contact with the grip portion 2, and the concave portion K of the grip portion 2 should be gripped. You may make it make it smaller than the outer diameter of a flexible tube. However, as shown in FIG. 22, when the grip portion 2 is closed, the concave portion K and the flexible tube C come into contact with each other and the grip portion 2 is not completely closed (the detection by the contact detection sensor S2 is not performed). Not). As a result, while the flexible tube C is inserted into the insertion groove 1b, there is no detection by the contact detection sensor S2, and the flexible tube C is inserted into the insertion groove 1b (gripping by the grip portion 2). Therefore, the presence or absence of the flexible tube can be detected. According to this configuration, it is possible to confirm that the flexible tube C is securely held by providing the contact detection sensor S2 that detects the presence of the flexible tube C in the fitting groove 1b. Safety can be improved.

  Furthermore, as shown in FIGS. 23 to 27, the concave portion K of the grip portion 2 is made smaller than the outer diameter of the flexible tube C to be gripped, and the inner wall surface of the grip portion 2 and the convexity of the base portion 1 are used. The protrusion 10 (see FIG. 24) may be formed at a predetermined portion facing the portion 1a. More specifically, an insertion hole 1ab is formed in a predetermined portion of the side wall of the convex portion 1a of the base portion 1, and the elastic member 11 and the contact detection sensor S3 are provided in the insertion hole 1ab. The contact detection sensor S3 is prevented from coming out of the insertion hole 1ab by a retaining means (not shown).

  However, as shown in FIG. 25, the projecting portion 10 is configured to press the contact detection sensor S <b> 3 in a state where the grip portion 2 is normally gripping the flexible tube C and is closed at a predetermined position. Thereby, in a state where the flexible tube C is not gripped with respect to the grip portion 2 and is completely closed (see FIG. 26), and in a state where the grip portion 2 is open (see FIG. 27), the contact detection sensor S3 and the protrusion Since the unit 10 does not come into contact, the contact detection sensor S3 does not detect it.

  Therefore, it is possible to detect that the flexible tube C is securely attached and that the grip portion 2 is closed at a predetermined position by the detection by the contact detection sensor S3. It is possible to easily and quickly grasp the flexible tube C when it is accidentally dropped while simultaneously confirming the two states that the is securely attached. Can be further improved.

  In the above embodiment, the elastic member 11 may be other means as long as it can urge the contact detection sensor S3 in the direction of the protruding portion 10, for example, a rubber (resin) or a spring ( It may be a coil spring or a leaf spring). Further, the contact detection sensor S3 may be a contact type sensor such as a pressure sensor, or a non-contact type sensor such as an angle sensor or a photo sensor.

  Further, in the present embodiment, the gripping portion 2 is supported so as to be swingable about a swing shaft L formed on the base portion 1, and is in a closed state in which the closing portion 2a is closed by swinging and the closing portion 2a. Is opened to allow insertion of the flexible tube C. However, if the closed state and the open state are set, the gripping portion is moved to another operation (for example, a sliding operation). ). In addition, it is sufficient that the gripping portion 2 can be brought close to or separated from the base portion 1, and in the present invention, the proximity includes contact and also makes contact or separation with respect to the base portion 1. It may be a thing.

    A base portion and a closing portion that can be moved close to or away from the base portion and closed when closed to the base portion, and is flexible in the closed state. Formed on the outer surface of the closing portion of the gripping portion, the gripping portion being in the closed state. When the flexible tube is pressed, the gripping portion is swung against the urging force of the urging means, and a sloped surface is provided that allows the flexible tube to be inserted into the gripping portion. If it is the tube gripping device for a blood purification device, it can be applied to a device having a different external shape or a device to which other functions are added.

DESCRIPTION OF SYMBOLS 1 Base part 1b Insertion groove 2 Gripping part 2a Closure part 3 Torsion spring (biasing means)
4 Gradient surface 5 Inner surface 5a Recess 6 Clamping device 7 Clamping unit 8 Solenoid 9 Iron core 10 Protruding unit 11 Elastic member C Flexible tube L Oscillating shaft

Claims (5)

In the tube gripping device for a blood purification device for gripping a flexible tube used in a blood purification device for blood purification treatment,
A base part;
Provided with a closing portion that can be closed or closed when close to the base portion, and closes and closes the base portion, and in which the flexible tube is inserted A gripper that can be gripped
An urging means for constantly urging the gripping portion in a closed state;
When the flexible tube is pressed when the gripping portion is closed, the gripping portion is formed on the outer surface of the closing portion of the gripping portion and receives the pressing force against the biasing force of the biasing means. And a sloped surface that allows the flexible tube to be inserted into the gripping portion by causing the pressing force to act in the direction of separating the base from the base portion,
A tube gripping device for a blood purification device, comprising:   The grip portion is supported so as to be swingable about a swing shaft formed on the base portion, and the swing shaft of the grip portion is connected to the center of the flexible tube fitted in the base portion. The tube gripping device for a blood purification device according to claim 1, wherein the tube gripping device is formed at substantially the same height or at a position lower than the center of the flexible tube.   The inner surface of the closing portion of the grip portion extends in a substantially vertical direction with respect to the base portion, or extends in an inclined direction in the same direction as the inclined surface. Tube gripping device for blood purification apparatus.   The tube gripping device for a blood purification apparatus according to claim 3, wherein a concave portion having a shape following the outer peripheral surface of the flexible tube is formed on an inner surface of the closing portion of the gripping portion.   A blood purification apparatus comprising the tube gripping device for a blood purification apparatus according to any one of claims 1 to 4.

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