Clamp

Abstract

To provide a clamp capable of reliably clogging a medical tube.SOLUTION: A clamp 10 includes: a fixing part 12 where a medical tube 80 is placed on an upper part; a mobile part 14 opposing to the fixing part 12 on an upper side of the fixing part 12; a pressing part 40 projected from the mobile part 14 so as to press the medical tube 80; and a pair of side walls 24 extended in a wall shape from both sides of the fixing part 12. The clamp has guide structures constituted by spherical surfaces formed in side parts of the pressing part 40 so as to allow the pressing part 40 to be guided between the side walls 24.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a clamp for occluding flexible tubing. [Background technology]

[0002] Flexible medical tubes are used as flow paths connecting blood bags in blood collection sets and bags in infusion sets, and clamps are attached to these medical tubes to block the flow paths.

[0003] The clamp includes a hole through which the medical tube is inserted, a pressing part that compresses and closes the inserted medical tube, a movable part for inputting an operating force to the pressing part, and a locking mechanism that keeps the movable part in a pressed state. In the initial state of the clamp, the pressing part is open due to the elastic force of the movable part. When a user presses the movable part, the pressing part compresses and closes the tube, and the movable part is locked by the locking mechanism, so that the pressing part maintains the state in which the tube is closed.

[0004] In a blood center or the like that processes a large number of blood bags, a user may continuously perform an operation to close a large number of clamps. Also, in a busy medical facility, a user may need to perform an operation to close a clamp quickly. In such a case, the user may operate the clamp with one hand without visually checking the hand. In rare cases, the clamp may press the medical tube while it is in a state of being laterally shifted from the pressing portion, which may result in incomplete closure of the flow path.

[0005] In order to prevent such incomplete blockage of the flow path of the medical tube, JP 2018-000836 A describes a technique in which a pair of side walls is provided on both sides of the pressing portion to prevent lateral displacement of the medical tube. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2018-000836 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, it was found that with the above clamp, a new problem occurs in that the pressing portion may ride up onto the sidewall and the movable portion may become locked by the locking mechanism, causing the pressing portion to not completely block the medical tubing.

[0008] SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide a clamp that can reliably close a medical tube. [Means for solving the problem]

[0009] One aspect of the following disclosure is a clamp comprising: a fixed part on which a tube is placed, a movable part above the fixed part and facing the fixed part, and a blocking part that compresses and blocks the tube when the movable part is pressed towards the fixed part, wherein the blocking part has a pressing part that protrudes from the movable part towards the fixed part and presses the tube, a pair of sidewalls that extend like walls from both sides of the fixed part and prevent lateral displacement of the tube, and a guide structure that is provided on the pressing part and guides the pressing part between the sidewalls, wherein the guide structure is made of a spherical surface formed on a side of the pressing part, and a raised part that is curved with the same curvature as the curvature of the spherical surface is formed at the boundary between the fixed part and the sidewall. Effect of the Invention

[0010] According to the clamp of the above aspect, even if the pressing portion rides up onto the side wall, the guide structure guides the pressing portion to the inside of the side wall, so that the medical tube can be reliably closed. [Brief description of the drawings]

[0011] [Figure 1]FIG. 1 is a perspective view of a clamp according to a first embodiment (part 1). [Diagram 2] FIG. 2 is a perspective view (part 2) of the clamp according to the first embodiment. [Diagram 3] 2 is a cross-sectional view taken along the widthwise center of the clamp of FIG. 1. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 3. [Diagram 5] 11A and 11B are cross-sectional views showing an example of operation of a clamp according to a comparative example. [Figure 6] 6A is a cross-sectional view showing the operation of the clamp in FIG. 1 when a pressing portion rides up onto a side wall, and FIG. 6B is a cross-sectional view showing a state in which a medical tube is blocked by the clamp in FIG. 6A. [Figure 7] FIG. 7A is a cross-sectional view of a clamp according to a second embodiment, and FIG. 7B is a cross-sectional view showing the operation when the pressing portion of the clamp in FIG. 7A rides up onto a sidewall. [Figure 8] FIG. 11 is a cross-sectional view of a clamp according to a third embodiment. [Figure 9] FIG. 10 is a cross-sectional view of a clamp according to a fourth embodiment. [Figure 10] FIG. 10A is a perspective view of a clamp according to a fifth embodiment, and FIG. 10B is a cross-sectional view showing the operation when a pressing portion of the clamp in FIG. 10A rides up onto a sidewall. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the clamp of the present invention will be described in detail with reference to the accompanying drawings.

[0013] (First embodiment) 1 is integrally formed from a resin material and is attached to a medical tube 80 such as a blood tube or an infusion tube, and is used for operations such as blocking and opening the medical tube 80. As shown in FIG. 1, the clamp 10 has a fixed portion 12 on which the medical tube 80 is placed, a movable portion 14 disposed opposite to and above the fixed portion 12, a curved portion 16 connecting the fixed portion 12 and the movable portion 14, an upright portion 18 opposite to the curved portion 16, and a blocking portion 20 for blocking the medical tube 80.

[0014] The fixing part 12 is a plate-like part extending long in the front-rear direction, and the medical tube 80 is placed on the upper part. A curved part 16 extends upward from the rear end of the fixing part 12. In addition, an upright part 18 extends upward from the front end of the fixing part 12. A base part 22 constituting a part of the blocking part 20 and a pair of side walls 24 extending upward from both sides of the fixing part 12 in the width direction are formed in the center of the fixing part 12 in the front-rear direction.

[0015] The curved portion 16 is a member extending upward from the fixed portion 12, and is curved in a semicircular shape in side view. The curved portion 16 is capable of elastic deformation in a direction that reduces or increases the radius of curvature. A first insertion hole 28 is formed in the center of the curved portion 16, penetrating in the thickness direction (front-rear direction). The first insertion hole 28 is a hole for introducing the medical tube 80 into the tube arrangement space 30 between the fixed portion 12 and the movable portion 14, and is formed with dimensions in the width direction and the up-down direction that allow the medical tube 80 to be inserted. A pair of pillars 32 are formed on both sides of the first insertion hole 28. The pillars 32 determine the hardness (spring constant) of the curved portion 16 during elastic deformation.

[0016] The upper end of the curved portion 16 is integrally connected to the rear end of the movable portion 14. When the curved portion 16 is elastically deformed, the movable portion 14 rotates about the rear end of the curved portion 16, and the movable portion 14 is displaceable in the up and down directions of the fixed portion 12.

[0017] The movable part 14 is a plate-like member, and its tip 14a is disposed above the front end of the fixed part 12. A claw 34 for engaging with a locking mechanism 44 (described later) is formed on the upper side of the tip 14a of the movable part 14. The claw 34 is formed to extend linearly in the width direction. As shown in FIG. 2, the upper surface of the movable part 14 is provided with a plurality of ridges 36 each consisting of a linear protrusion extending in the width direction. These ridges 36 function as anti-slip devices when a user inputs an operating force to the movable part 14.

[0018] A protrusion 38 and a pressing portion 40 that constitute part of the blocking portion 20 are formed on the underside of the movable portion 14. The protrusion 38 and the pressing portion 40 will be described in detail later in the explanation of the blocking portion 20.

[0019] On the other hand, the standing portion 18 extends upward from the front end of the fixed portion 12. The standing portion 18 extends upward while curving in an arc shape in side view, and an inclined surface 42 that abuts against the lower part of the tip portion 14a of the movable portion 14 and a locking mechanism portion 44 that engages with the claw portion 34 are formed at the upper end portion 18a. The inclined surface 42 is formed as a surface that inclines downward toward the rear. When the movable portion 14 is pressed, the inclined surface 42 abuts against the tip portion 14a of the movable portion 14 and slides, leading the tip portion 14a of the movable portion 14 to the locking mechanism portion 44. When the pressing force from the movable portion 14 acts on the inclined surface 42, the standing portion 18 is curved so as to be pushed forward and spread out.

[0020] The locking mechanism 44 is a hook-shaped portion having an upwardly concave groove 44a extending in the width direction. When the movable part 14 is pressed down, the locking mechanism 44 engages with the claw 34 of the tip 14a to prevent the movable part 14 from returning upward and lock the movable part 14 in a state where it is pressed down (pressed state).

[0021] A second insertion hole 46 is formed below the locking mechanism 44 of the standing portion 18. The second insertion hole 46 is formed penetrating the standing portion 18 in the thickness direction (front-to-back direction). The second insertion hole 46 is formed in a rectangular shape when viewed from the front. The width direction and up-down direction dimensions of the second insertion hole 46 are formed larger than the diameter of the medical tube 80, allowing the medical tube 80 to be inserted therethrough.

[0022] 1, medical tubing 80 is introduced into tube arrangement space 30 between fixed section 12 and movable section 14 through first insertion hole 28 of bending section 16 and second insertion hole 46 of standing section 18. Then, medical tubing 80 is blocked by blocking section 20.

[0023] The blocking portion 20 will now be described. As shown in Fig. 1, the blocking portion 20 includes a base portion 22 and a sidewall 24 formed on the fixed portion 12 side, and a protrusion portion 38 and a pressing portion 40 formed on the movable portion 14 side.

[0024] Of these, base portion 22 has a gently sloping front surface 22a, a rear surface 22b that rises up approximately perpendicular to fixed portion 12 as shown in Fig. 2, and an upper end surface 22c that is formed between the upper ends of front surface 22a and rear surface 22b and is parallel to fixed portion 12. Upper end surface 22c is formed at a position where it can come into contact with pressing portion 40 (described below) when movable portion 14 is pressed, and serves as a portion that supports medical tube 80 from below. Both side portions of base portion 22 are hollowed out by hollowed-out portions 25. Base portion 22 is supported from below by a rib 26 provided in the center in the width direction as shown in Fig. 4.

[0025] A pair of side walls 24 are provided on both sides of base portion 22. Side walls 24 are formed extending like a wall above fixed portion 12 along the sides of fixed portion 12. Side walls 24 protrude above upper end surface 22c, thereby preventing medical tubing 80 from shifting sideways.

[0026] On the other hand, the protrusion 38 is formed to protrude from the lower surface side of the movable part 14 toward the fixed part 12. The protrusion 38 is formed in a triangular shape with an apex on the lower end side in a side view. The dimension of the protrusion 38 in the width direction is formed to be smaller than the distance between the pair of side walls 24, so that it can be inserted inside the side wall 24. The protrusion 38 is hollowed out at both sides by the hollowed out parts 37. In addition, the protrusion 38 is supported from the upper movable part 14 side by a rib 39 provided in the center in the width direction as shown in FIG. 4. A pressing part 40 is formed at the lower end of the protrusion 38.

[0027] The pressing portion 40 is disposed above the vicinity of the upper end surface 22c of the base portion 22, and is provided to protrude from the lower end of the protrusion portion 38. The pressing portion 40 is formed in a cylindrical shape having a central axis in the width direction, and compresses and closes the medical tube 80 through a linear abutment portion 40a extending in the width direction. The pressing portion 40 is formed to have a smaller width dimension than the gap (widthwise separation distance) between the pair of side walls 24 so that the pressing portion 40 can be inserted between the pair of side walls 24. In addition, a first inclined structure 48 is formed on both sides in the width direction of the pressing portion 40, which is inclined so that the widthwise dimension of the pressing portion 40 becomes smaller toward the lower end. In this embodiment, the first inclined structure 48 is configured as a spherical surface 50, as shown in Figures 1, 2, and 4.

[0028] As shown in FIG. 4, a raised portion 52 curved with the same curvature as the curvature of the spherical surface 50 is formed at the boundary between the upper end surface 22c of the base portion 22 and the sidewall 24 to fill a gap that occurs when the pressing portion 40 is brought into contact with the upper end surface 22c. The raised portion 52 is formed to extend in the front-rear direction along the base of the base portion 22 and the sidewall 24. The raised portion 52 is formed over the entire area of ​​the sidewall 24 in the front-rear direction. By providing such a raised portion 52, the sidewall 24 is reinforced. In addition, the raised portion 52 can prevent stress from concentrating at the base of the sidewall 24 when an external force acts on the sidewall 24, and can prevent damage to the sidewall 24.

[0029] The clamp 10 of this embodiment is constructed as described above, and its operation will be described below.

[0030] 1 and 3, clamp 10 is used by inserting medical tubing 80 through first insertion hole 28 and second insertion hole 46. Medical tubing 80 is disposed between fixed part 12 and movable part 14, and between a pair of side walls 24, and is held within tube arrangement space 30.

[0031] When the user presses the tip 14a of the movable part 14 so that it approaches the fixed part 12, the curved part 16 is elastically deformed so that its radius of curvature becomes smaller. Then, the movable part 14 is displaced so as to approach the fixed part 12. As shown in FIG. 6A, the medical tube 80 is sandwiched and compressed between the pressing part 40 and the upper end surface 22c of the base part 22. When the movable part 14 is further pressed, the tip 14a of the movable part 14 shown in FIG. 1 slides while abutting against the inclined surface 42 of the standing part 18. As the movable part 14 is pressed down, a load acts in a direction that tilts the standing part 18 forward via the inclined surface 42, and the upper end of the standing part 18 is deformed so as to tilt forward. Then, the claw part 34 of the movable part 14 is caught in the locking mechanism part 44 of the standing part 18, and the movable part 14 is fixed to the locking mechanism part 44.

[0032] In clamp 10, first insertion hole 28 for inserting medical tubing 80 is formed in bending portion 16, so that bending portion 16 has low rigidity. Therefore, when a user presses movable portion 14, tip portion 14a may shift in the width direction, and pressing portion 40 of movable portion 14 may ride up onto sidewall 24.

[0033] The clamp 100 of the comparative example shown in FIG. 5 shows an example in which the first inclined structures 48 are not provided on both sides of the pressing portion 40. In the clamp 100 of the comparative example, once the pressing portion 40 rides up on the sidewall 24, the state is maintained. Even in such a case, since the movable portion 14 is formed of a resin material that is easily elastically deformed, in the clamp 100 of the comparative example, the tip portion 14a of the movable portion 14 is fixed to the locking mechanism portion 44 while the pressing portion 40 remains in the state of riding up on the sidewall 24. This results in an event in which the medical tube 80 is not completely blocked.

[0034] In contrast, in the clamp 10 of this embodiment, a first inclined structure 48 consisting of a spherical surface 50 is formed on both sides of the pressing portion 40. The first inclined structure 48 is formed of an inclined curved surface such that the dimension of the pressing portion 40 in the width direction becomes smaller toward the lower end. Therefore, even if the pressing portion 40 rides up onto the sidewall 24 as shown in FIG. 6A, the pressing portion 40 is drawn between the pair of sidewalls 24 by the first inclined structure 48 as shown by the arrow. As a result, according to the clamp 10 of this embodiment, the pressing portion 40 is reliably inserted between the pair of sidewalls 24 as shown in FIG. 6B, and the closing operation of the medical tube 80 can be reliably performed.

[0035] The clamp 10 of the present embodiment provides the following advantages.

[0036] The clamp 10 of this embodiment comprises a fixed portion 12 on top of which a medical tubing 80 (tube) is placed, a movable portion 14 above the fixed portion 12 and facing the fixed portion 12, and a blocking portion 20 that compresses and blocks the medical tubing 80 when the movable portion 14 is pressed toward the fixed portion 12. The blocking portion 20 has a pressing portion 40 that protrudes from the movable portion 14 toward the fixed portion 12 and presses the medical tubing 80 with a linear abutment portion 40a extending in the width direction, a pair of sidewalls 24 that extend in a wall-like manner from both sides of the fixed portion 12 to prevent lateral displacement of the medical tubing 80, and a first inclined structure 48 that is provided on at least one of the pressing portion 40 and the sidewall 24 and serves as a guide structure to guide the pressing portion 40 between the sidewall 24.

[0037] According to the clamp 10 described above, even if the pressing portion 40 rides up onto the side wall 24, the guide structure guides the pressing portion 40 to the inside of the side wall 24, so that the medical tube 80 can be reliably blocked.

[0038] In the above-described clamp 10, the first inclined structure 48 may be configured with a spherical surface 50. With this configuration, the pressing portion 40 can be drawn into between the pair of side walls 24 more smoothly.

[0039] In the clamp 10 described above, a raised portion 52 corresponding to the shape of the first inclined structure 48 may be formed at the boundary between the fixing portion 12 and the sidewall 24. According to this configuration, the raised portion 52 can fill the clearance caused by the first inclined structure 48, so that the medical tube 80 can be reliably blocked.

[0040] In the above clamp 10, raised portion 52 may be formed over the entire area of ​​sidewall 24 in the extension direction of medical tubing 80. This configuration improves the rigidity of sidewall 24, making it possible to prevent deformation or damage of sidewall 24.

[0041] In the above embodiment, the first inclined structure 48 is configured with the spherical surface 50, but the embodiment is not limited to this, and the first inclined structure 48 may be configured with a flat inclined surface. Also, the first inclined structure 48 may be configured by connecting a plurality of inclined surfaces with different inclination angles.

[0042] Second embodiment Clamp 10A according to this embodiment shown in Fig. 7A differs from clamp 10 according to the first embodiment shown in Figs. 1 to 4, 6A, and 6B in the configuration of first inclined structure 48A of pressing portion 40. Note that in clamp 10A, the configuration other than first inclined structure 48A is similar to clamp 10 according to the first embodiment. In clamp 10A, the same components as those in clamp 10 are denoted by the same reference numerals and detailed description thereof will be omitted.

[0043] As shown in Fig. 7A, the clamp 10A of this embodiment has a first inclined structure 48A formed on both sides of the pressing portion 40. The first inclined structure 48A has a notch 54 formed on both sides of the pressing portion 40. In the illustrated example, the notch 54 is formed in a wedge shape, but is not limited thereto, and various shapes such as a rectangular shape or a semicircular shape can be adopted. The first inclined structure 48A is not inclined when the pressing portion 40 does not ride up on the sidewall 24.

[0044] The clamp 10A of this embodiment is configured as described above, and its operation will be described below.

[0045] As shown in FIG. 7B, when the clamp 10A is pressed with the pressing portion 40 resting on the sidewall 24, the notch 54 of the first inclined structure 48A is crushed. Then, the pressing portion 40 has an inclined surface 54a formed on the side thereof as the notch 54 is crushed. The inclined surface 54a is inclined in a direction in which the dimension of the pressing portion 40 in the width direction becomes smaller toward the lower end, and when the movable portion 14 is pressed toward the fixed portion 12, the pressing portion 40 is guided between the pair of sidewalls 24 by the inclined surface 54a. In this way, the first inclined structure 48A also functions as a structure that draws the pressing portion 40 between the pair of sidewalls 24.

[0046] The clamp 10A of the present embodiment provides the following advantages.

[0047] The clamp 10A has a first inclined structure 48A as a guide structure, which is formed on the pressing portion 40 and forms an inclined surface on the pressing portion 40 that is inclined toward the inside of the sidewall 24 when the pressing portion 40 abuts against the upper end of the sidewall 24.

[0048] The clamp 10A described above also provides the same effects as the clamp 10 of the first embodiment.

[0049] In the clamp 10A of this embodiment, the first inclined structure 48A is not limited to the notch 54, but may be formed of a member that forms an inclined surface by being elastically compressed more than other portions when a load is input that presses the pressing portion 40 against the sidewall 24. For example, the first inclined structure 48A may be formed by disposing a material that is easily elastically compressed on both sides of the pressing portion 40.

[0050] Third embodiment 8, a clamp 10B of this embodiment is provided with a second inclined structure 56 at the upper end of the sidewall 24A as a guide structure for being guided between the sidewalls 24A. Note that in the clamp 10B of this embodiment, the same components as those in the clamp 10 according to the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0051] The clamp 10B has a second inclined structure 56 at the upper end of the sidewall 24A instead of providing an inclined structure on both sides of the pressing portion 40. The second inclined structure 56 is inclined toward the inside of the pair of sidewalls 24A. That is, the second inclined structure 56 of the left sidewall 24A in FIG. 8 is inclined downward from the side end of the left end toward the inside (right side), and is an inclined surface that draws the side of the pressing portion 40 into the inside of the sidewall 24A. The second inclined structure 56 of the right sidewall 24A is inclined downward from the side end of the right end toward the inside (left side), and is an inclined surface that draws the pressing portion 40 that abuts against the right sidewall 24A into the inside of the sidewall 24A.

[0052] The clamp 10B of this embodiment has the following advantages.

[0053] The clamp 10B of this embodiment has, as a guide structure, a second inclined structure 56 formed on the upper end of the sidewall 24A and inclined toward the inside of the sidewall 24A.

[0054] According to the clamp 10B described above, even if the pressing portion 40 rides up onto the side wall 24A, the second inclined structure 56 draws the pressing portion 40 into the inside of the side wall 24A, so that the medical tube 80 can be reliably blocked.

[0055] In the clamp 10B of this embodiment, the second inclined structure 56 is not limited to a flat surface, and may be configured with a curved surface such as a spherical surface or a parabolic surface. Also, the first inclined structure 48 may be formed on the pressing portion 40 side.

[0056] (Fourth embodiment) 9 includes a second inclined structure 56A at the upper end of the sidewall 24 as a guide structure for being guided between the sidewalls 24. In the clamp 10C of the present embodiment, the same components as those in the clamp 10 according to the first embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

[0057] The second inclined structure 56A of this embodiment has a notch 58 formed on the inner side of the sidewall 24. However, the upper end of the sidewall 24 is configured as a flat surface that is approximately parallel to the bottom surface of the fixing part 12 while not in contact with the pressing part 40. In the illustrated example, the first inclined structures 48 are formed on both sides of the pressing part 40, but this embodiment is not limited to this, and the first inclined structures 48 may not be formed.

[0058] The clamp 10C of this embodiment is configured as described above, and its operation will be described below.

[0059] When the movable part 14 of the clamp 10C is pressed, the pressing part 40 comes into contact with the upper end of the sidewall 24, and the cutout part 58 of the second inclined structure 56A is crushed by the load from the upper end of the sidewall 24. As a result, the upper end of the sidewall 24 becomes an inwardly inclined surface. This inclined surface draws the pressing part 40 between the sidewalls 24. In this way, the second inclined structure 56A is structured so that an inclined surface appears when the pressing part 40 comes into contact with it.

[0060] The clamp 10C of this embodiment has the following advantages.

[0061] The clamp 10C has, as a guide structure, a second inclined structure 56A that is formed on the sidewall 24 and forms an inwardly inclined surface at the upper end of the sidewall 24 when the pressing portion 40 abuts against it.

[0062] According to the above-described clamp 10C, even if the pressing portion 40 rides up onto the side wall 24, the second inclined structure 56A can draw the pressing portion 40 into the inside of the side wall 24, thereby ensuring occlusion of the medical tube 80.

[0063] Fifth embodiment 10A, a second inclined structure 56B is provided on the sidewall 24A as a guide structure for drawing the sidewall 24A in between. In the clamp 10D of this embodiment, the same components as those in the clamp 10 according to the first embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

[0064] The sidewall 24A of this embodiment is formed in a frame shape. The upper end of the sidewall 24A is composed of a plate member 60. The front and rear ends of the plate member 60 are supported by support portions 60a and 60b. The lower side of the plate member 60 is formed as a hole 62.

[0065] The second inclined structure 56B has a plurality of cut grooves 64 formed on the inside of the plate member 60. The cut grooves 64 are formed downward from the upper side of the plate member 60 to a predetermined depth. The cut grooves 64 may be formed so as to penetrate the plate member 60 in the up-down direction. The cut grooves 64 may also be formed so as to cut upward from the lower side of the plate member 60.

[0066] The clamp 10D of this embodiment is configured as described above, and its operation will be described below.

[0067] As shown in FIG. 10B, when the pressing portion 40 rides up onto the upper end of the sidewall 24A, the load from the pressing portion 40 causes the plate member 60 to deform around the cut groove 64. Because the cut groove 64 is formed on the inside, the plate member 60 deforms so as to tilt inward as shown. Then, an inwardly inclined surface is formed on the upper surface of the plate member 60. In this way, the second inclined structure 56B forms an inclined surface that draws the pressing portion 40 inward when the pressing portion 40 rides up onto the sidewall 24A. This allows the clamp 10D to guide the pressing portion 40 between the sidewalls 24A and reliably block the medical tube 80.

[0068] Although the present invention has been described above with reference to preferred embodiments, it goes without saying that the present invention is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0069] 10, 10A to 10D... Clamp 12... Fixing part 14: Movable part 16: Curved part 20: Closure portion 24, 24A: Sidewall 40: pressing portion 48, 48A: first inclined structure 56, 56A, 56B…Second slope structure

Claims

1. a fixing portion on which the tube is placed; a movable portion facing the fixed portion above the fixed portion; a blocking portion that compresses and blocks the tube when the movable portion is pressed toward the fixed portion, The blocking portion is a pressing portion that protrudes from the movable portion toward the fixed portion and presses the tube; a pair of side walls extending from both sides of the fixing portion to prevent the tube from shifting laterally; a guide structure provided on the pressing portion to guide the pressing portion between the sidewalls, The guide structure is a spherical surface formed on a side of the pressing portion, A clamp, wherein a raised portion curved with the same curvature as the curvature of the spherical surface is formed at the boundary between the fixing portion and the sidewall.

2. 2. The clamp according to claim 1, wherein the raised portion is formed over the entire area of ​​the sidewall in the extending direction of the tube.

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