Transfer equipment

Abstract

To provide a transfer device for efficiently transferring a medical sheet to an object to be treated.SOLUTION: In a transfer device 10, a tip side region 25 of first and second shafts 24 and 48 comprises a curved part 27 to which a curved shape is given with respect to an axial direction of an outer cylinder 22. When the first and second shafts are located at a first position, the curved part has a straight shape or a shape closer to the straight shape than the curved shape. When the first and second shafts are located at a second position, a portion protruding from a tip opening of the outer cylinder out of the first and second shafts is curved with respect to the axial direction by an elastic restoring force of the curved part.SELECTED DRAWING: Figure 16

Description

【Technical Field】 【0001】 The present invention relates to a transfer device for transferring a medical sheet to a treatment target part of a living body. 【Background Art】 【0002】 Patent Document 1 discloses, for example, a transfer device for transferring a medical sheet (cell sheet) used for organ transplantation to a treatment target part of a living body. This transfer device includes a shaft and a support part provided at the tip of the shaft. The support part has a sheet support for placing the medical sheet. In the transfer device, the medical sheet is transferred from the support part to the treatment target part by sliding the transfer device while pressing the upper surface of the medical sheet placed on the support surface of the sheet support with forceps or the like. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2009-000511 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In the above-described conventional technology, when transferring a medical sheet from the support surface of the support part to the treatment target part of a living body, it is necessary to operate the transfer device while pressing the upper surface of the medical sheet with forceps or the like. Therefore, there is a concern that the medical sheet cannot be efficiently transferred to the treatment target part. 【0005】 An object of the present invention is to solve the above-described problems. 【Means for Solving the Problems】 【0006】 (1) An aspect of the present invention is a transport device for transporting a medical sheet to a part of a living body to be treated, comprising: a first carrier member having an outer cylinder; a tubular first shaft extending in the axial direction of the outer cylinder and disposed inside the outer cylinder so as to be movable along the axial direction; and a sheet-like support portion disposed at the tip of the first shaft and including a support surface capable of holding the medical sheet; and a second carrier member having a second shaft extending within the first shaft and provided so as to be movable along the first shaft, wherein in a first position in which the first and second shafts are moved in the base end direction relative to the outer cylinder so that the support portion is housed inside the outer cylinder, the support portion is housed inside the outer cylinder in a curved and deformed state, and the support portion In a second position, where the first and second shafts are moved in the tip direction relative to the outer cylinder so that they protrude from the tip opening of the outer cylinder, the support portion unfolds by being exposed from the outer cylinder in the tip direction, and the tip-side region of at least one of the first and second shafts has a curved portion that is curved in the axial direction, and when the first and second shafts are in the first position, the curved portion housed in the outer cylinder is straight or has a shape closer to a straight shape than the curved shape, and when the first and second shafts are in the second position, the portions of the first and second shafts that protrude from the tip opening of the outer cylinder are curved in the axial direction by the elastic restoring force of the curved portion. 【0007】 According to the present invention, since the transfer device is equipped with a second carrier member, the medical sheet can be transferred from the support unit to the treatment unit using the second carrier member without using other devices (such as forceps). Therefore, the medical sheet can be efficiently transferred to the treatment unit. 【0008】 Furthermore, since the portions of the first and second shafts that protrude from the tip opening of the outer cylinder are curved relative to the axial direction of the outer cylinder, the first and second shafts can be curved at a position close to the support portion that holds the medical sheet. This makes it possible to adjust the angle of the support portion relative to the axial direction inside the body when inserting the outer cylinder into the body and transferring the medical sheet to the area to be treated. As a result, the medical sheet held by the angle-adjusted support portion can be easily transferred to the area to be treated. 【0009】 (2) In the transfer device described in (1) above, the tip-side region of the first shaft has a first curved portion which is the curved portion, and the tip-side region of the second shaft has a second curved portion which is the curved portion, and the first and second curved portions may be curved in the same direction with respect to the axial direction. 【0010】 Since the first and second curved sections are curved in the same direction, the portions of the first and second shafts that protrude from the tip opening of the outer cylinder can be curved in the same direction axially by the elastic restoring force of the first and second curved sections. This prevents the support section from rotating around the axial direction of the outer cylinder when it protrudes from the tip opening of the outer cylinder. As a result, the medical sheet held by the support section can be reliably transferred to the treatment area. 【0011】 (3) In the transport device described in (1) or (2) above, the tip of the second shaft is provided with a sheet-like second support portion including a second support surface capable of holding the medical sheet, and the second support portion may be movable relative to the support portion between a retracted position overlapping the support surface and an extended position located further forward than the support surface. 【0012】 The medical sheet can be moved along the support portion by the second support portion which has a second support surface. 【0013】 (4) In the transfer device described in any one of (1) to (3) above, the support portion is formed of a flexible sheet having a surface including the support surface and a back surface which is the opposite surface, and the support portion has a pair of protrusions projecting upward from both sides in the width direction of the support surface which is perpendicular to the direction of movement of the first shaft, and the support portion may be housed in the outer cylinder in a curved deformation such that both sides of the support portion in the width direction on the back surface are in contact with each other at the first position. 【0014】 When the support part is housed inside the outer cylinder, the pair of protrusions curve and deform into a convex shape, and the back surfaces of the protrusions come into contact with each other. The pair of protrusions then displace toward the support surface, causing the support part to curve and deform into a heart shape. As a result, the support part can be housed in a heart shape inside the outer cylinder, which reduces damage to the medical sheet held by the support part compared to when the support part deforms into a shape other than a heart shape. Furthermore, because the support part can be housed smoothly and compactly inside the outer cylinder, the diameter of the outer cylinder can be reduced compared to a configuration in which the support part does not curve and deform into a heart shape. [Effects of the Invention] 【0015】 According to the present invention, since the transfer device is equipped with a second carrier member, the medical sheet can be transferred from the support unit to the treatment unit using the second carrier member without using other devices (such as forceps). Therefore, the medical sheet can be efficiently transferred to the treatment unit. 【0016】 Furthermore, since the portions of the first and second shafts that protrude from the tip opening of the outer cylinder are curved relative to the axial direction of the outer cylinder, the first and second shafts can be curved at a position close to the support portion that holds the medical sheet. This makes it possible to adjust the angle of the support portion relative to the axial direction inside the body when inserting the outer cylinder into the body and transferring the medical sheet to the area to be treated. As a result, the medical sheet held by the angle-adjusted support portion can be easily transferred to the area to be treated. [Brief explanation of the drawing] 【0017】 [Figure 1] Figure 1 is a perspective view of a transfer device according to an embodiment of the present invention. [Figure 2] Figure 2 is an exploded perspective view of the transfer device of Figure 1. [Figure 3] Figure 3 is a side view of the first carrier member. [Figure 4] Figure 4 is a side view of the second carrier member. [Figure 5] Figure 5 is a plan view of the tip portion of the transfer device of Figure 1. [Figure 6] Figure 6 is a longitudinal sectional view taken along line VI-VI of Figure 5. [Figure 7] Figure 7 is a cross-sectional view taken along line VII-VII of Figure 5. [Figure 8] Figure 8 is a flowchart showing the procedure of a method for transferring a medical sheet using the transfer device of Figure 1. [Figure 9] Figure 9 is a first explanatory view of the sheet placement step. [Figure 10] Figure 10 is a second explanatory view of the sheet placement step. [Figure 11] Figure 11 is an explanatory view of the accommodation step. [Figure 12] Figure 12 is a cross-sectional view taken along line XII-XII of Figure 11. [Figure 13] Figure 13 is a cross-sectional view taken along line XIII-XIII of Figure 11. [Figure 14] Figure 14 is an explanatory view of the arrangement step. [Figure 15] Figure 15 is an explanatory view of the deployment step. [Figure 16] Figure 16 is a first explanatory view of the movement step. [Figure 17] Figure 17 is a second explanatory view of the movement step. [Figure 18] Figure 18 is a first explanatory view of the removal step. [Figure 19] Figure 19 is a second explanatory view of the removal step. [Figure 20] Figure 20 is a cross-sectional view of a transfer device provided with a movement restricting portion according to a first modification. [Figure 21] Figure 21A is a plan view of the tip of a transfer device showing a movement restricting section according to a second modified example, and Figure 21B is a plan view showing the first support section of the transfer device in Figure 21A housed in the outer cylinder. [Figure 22] Figure 22 is a plan view of the tip of a transfer device according to a third modified example having a first support portion. [Figure 23] Figure 23 is a cross-sectional view along the line XXIII-XXIII in Figure 22. [Figure 24] Figure 24 is an enlarged perspective view of the tip of a transfer device according to a fourth modified example, which is equipped with a pressing body. [Figure 25] Figure 25 is an enlarged perspective view of the tip of a transfer device according to a fifth modified example equipped with a pressing body. [Figure 26] Figure 26 is a cross-sectional view of the tip of the transfer device shown in Figure 25. [Modes for carrying out the invention] 【0018】 As shown in Figure 1, the transport device 10 according to this embodiment is a medical device for transporting a medical sheet 300 to a treatment area of ​​a living body. The transport device 10 is used, for example, in the treatment of severe heart failure due to ischemic heart disease. In this case, the medical sheet 300 is implanted in the target area 402 of the heart 400 (the treatment area of ​​the living body) (see Figures 14 to 19). Multiple medical sheets 300 can be attached to the target area 402 using the transport device 10. 【0019】 Such medical sheets 300 include pharmaceuticals, regenerative medicine products, medical devices, etc., for medical use. Medical sheets 300 are formed in a sheet-like form, such as a film or membrane (gel-like substance). Medical sheets 300 may be reinforced by coating them with fibrin or the like. Regenerative medicine products containing cells include, for example, cell sheets (sheet-like cell cultures), spheroids, etc. Cell sheets can be formed by culturing autologous or allogeneic cells. Examples of cell sheets include skeletal muscle-derived cell sheets or iPS cell-derived cardiomyocyte sheets. 【0020】 The medical sheet 300 may contain tissue adhesive, local anesthetic, etc. The thickness of the medical sheet 300 is, for example, about 100 μm, and the diameter of the medical sheet 300 is, for example, about 60 mm. However, the thickness and diameter (size) of the medical sheet 300 can be set as appropriate. 【0021】 The medical sheet 300 may also be a sheet that is implanted in organs other than the heart 400 (for example, the lungs, liver, pancreas, kidneys, small intestine, esophagus, etc.). Furthermore, the medical sheet 300 may also be a sheet used for medical purposes, for example, to prevent adhesions. 【0022】 As shown in Figures 1 and 2, the transfer device 10 comprises a device body 12, an endoscope 14, and a fixing member 16. The device body 12 has a first carrier member 18, a second carrier member 20, an outer cylinder 22, and a movement restricting part 23. As shown in Figures 3 and 4, the first shaft 24 of the first carrier member 18 and the second shaft 48 of the second carrier member 20 each have a curved shape, but in the exploded perspective view of Figure 2, for ease of illustration, the first shaft 24 and the second shaft 48 are shown as being in a straight state, similar to Figure 1. Note that the transfer device 10 is not limited to cases in which an endoscope 14 is included. 【0023】 In Figure 2, the first carrier member 18 has a first shaft 24 and a first support portion 26. 【0024】 The first shaft 24 is a tubular body (in this embodiment, a circular pipe member) having a first lumen 28. The first lumen 28 opens at the tip of the first shaft 24 (the end in the direction of arrow X1) and also at the base end of the first shaft 24 (the end in the direction of arrow X2). An airtight valve body 55 is provided at the base end of the first shaft 24, which is in close contact with the outer circumferential surface of the second shaft 48. 【0025】 The first shaft 24 extends axially from the outer cylinder 22 and is positioned inside the outer cylinder 22 so as to be movable along the axial direction. The first shaft 24 is made of, for example, a resin material. The constituent material of the first shaft 24 is not particularly limited, but includes polyethylene, polypropylene, fluororesin, polyethylene terephthalate, polymethyl methacrylate, polyamide resin, polystyrene, polycarbonate, polyimide, polyetherimide, polyetheretherketone, polyvinyl chloride, ABS resin, polyamide elastomer, polyester elastomer, etc. The first shaft 24 may also be made of a metal material. 【0026】 As shown in Figure 3, the tip region 25 of the first shaft 24 has a curved portion 27 that is curved in the axial direction of the outer cylinder 22 (the direction along the axis Ax of the first shaft 24 shown in Figure 6). Figure 3 illustrates the case where the tip region 25 of the first shaft 24 has a first curved portion 29, which is the curved portion 27. Therefore, the tip region 25 of the first shaft 24 may be made of a flexible resin material. That is, the tip region 25 of the first shaft 24 is flexible. In this case, the first curved portion 29 can be formed by bending the tip region 25 of the first shaft 24 into the shape shown in Figure 3. The base region of the first shaft 24 may be made of a hard resin material. 【0027】 As shown in Figures 1 and 2, the outer cylinder 22 is a straight tubular body. Therefore, when the first shaft 24 is housed inside the outer cylinder 22, as in the first position described later (see Figures 11 and 14), the shape of the first curved portion 29 housed inside the outer cylinder 22 is restricted by the inner circumferential surface of the outer cylinder 22. That is, the first curved portion 29 housed inside the outer cylinder 22 is either straight or closer to a straight shape than a curved shape (see Figures 11 and 14). The tip region of the outer cylinder 22 may be slightly curved. 【0028】 At least the portion of the outer cylinder 22 that houses the curved portion 27 and the first support portion 26 is made of a hard resin material. This allows the first support portion 26 to be curved into a heart shape, as described later, when it is housed in the outer cylinder 22. In addition, the first curved portion 29, which is the curved portion 27, and the second curved portion 61, as described later, can be housed in a straight shape, or a shape closer to a straight shape than a curved shape (a slightly curved shape), within the outer cylinder 22. 【0029】 Furthermore, as shown in the second position described later (see Figures 15 to 19), when the tip region 25 of the first shaft 24 protrudes from the tip opening 80 of the outer cylinder 22, the portion of the first shaft 24 that protrudes from the tip opening 80 of the outer cylinder 22 is curved relative to the axial direction of the outer cylinder 22 by the elastic restoring force of the first curved portion 29 (see Figures 15 to 19). In this case, the degree of curvature of the first shaft 24 relative to the axial direction of the outer cylinder 22 (the angle of the first shaft 24 relative to the axial direction) can be adjusted by adjusting the amount of protrusion of the first shaft 24 from the tip opening 80 of the outer cylinder 22. 【0030】 As shown in Figures 2, 3, 5, and 6, the first support portion 26 is attached to the tip of the first shaft 24. The first support portion 26 is made of, for example, a resin material. The first support portion 26 is capable of holding the medical sheet 300. The first support portion 26 is formed by bending a flexible resin sheet material (film material) into a predetermined shape. The first support portion 26 is formed, for example, by molding the sheet material into a predetermined shape using a sheet molding die. The thickness of the sheet material is not particularly limited, but is preferably set to, for example, 100 μm or more and 200 μm or less. The first support portion 26 has a first joint portion 30 and a first support body 32. 【0031】 The constituent material of the first support portion 26 is not particularly limited, but it is desirable that it be transparent. Examples include polyethylene, polycarbonate, polyamide, polystyrene, polypropylene, polyacetal resin, polyimide, polyetherimide, polyetheretherketone, polyethylene terephthalate, and fluororesin. The first support portion 26 may also be in the form of a mesh. 【0032】 In Figure 6, the first joint 30 is bonded to the inner circumferential surface of the tip of the first shaft 24 with an adhesive. The adhesive is not particularly limited, but examples include UV adhesives, hot melt adhesives, and instant adhesives (e.g., cyanoacrylate-based instant adhesives). The first joint 30 may also be heat-fused to the inner circumferential surface of the first shaft 24. 【0033】 As shown in Figure 5, the first support body 32 extends from the first joint 30 (see Figure 6) toward the tip. The first support body 32 has a base support portion 34, an intermediate support portion 36, a pair of first protrusions 38, a pair of second protrusions 40, and a tip support portion 42. 【0034】 The base support portion 34 extends from the tip of the first joint portion 30 toward the tip (direction of arrow X1) so as to be roughly aligned with the axis Ax of the first shaft 24 (see Figure 6). The base support portion 34 is formed to be wider in the direction of its extension. In other words, both sides of the base support portion 34 in the width direction are tapered toward the first joint portion 30. 【0035】 The intermediate support portion 36 intersects the axis Ax of the first shaft 24 from the tip of the base support portion 34 toward the tip (direction of arrow X1) and extends toward the tip (direction of arrow X1) of the first support portion 26 (see Figure 6). The intermediate support portion 36 is formed in a tapered shape, with its width gradually decreasing from the tip toward the base (direction of arrow X2). 【0036】 In Figures 2 and 5, the pair of first protrusions 38 project upward (in the direction of arrow Y) and inward in the width direction of the intermediate support portion 36 from both sides in the width direction of the intermediate support portion 36, which is perpendicular to the direction of movement of the first shaft 24. The pair of first protrusions 38 are connected to the base support portion 34. 【0037】 As shown in Figure 7, each of the pair of first protrusions 38 includes a fixed end 441 connected to the upper surface (first support surface 261) of the intermediate support portion 36, and a free end 442 which is the end spaced apart from the first support surface 261 in the direction of projection of the first protrusion 38. 【0038】 In the cross-section of the first projection 38 shown in Figure 7, which is perpendicular to the projection direction and perpendicular to the first support surface 261, each cross-section of the first projection 38 has an intermediate portion 443 that forms the space between the free end 442 and the fixed end 441. The intermediate portion 443 is an arc shape that bulges out convexly in the direction away from the first support surface 261. The cross-section of the intermediate portion 443 is not limited to an arc shape with a single radius, but may be an arc shape. In other words, in the cross-section of the first projection 38 shown in Figure 7, the intermediate portion 443 is positioned outward with respect to the line segment L connecting the fixed end 441 and the free end 442. 【0039】 In a cross-section perpendicular to the protruding direction of the first projection 38 shown in Figure 7, and perpendicular to the first support surface 261, the curvature R of the intermediate portion 443 increases toward the base end direction of the first support portion 26 (direction of arrow X2 in Figure 5). 【0040】 As shown in Figure 5, the pair of second protrusions 40 are each connected to the tips of the pair of first protrusions 38. The pair of second protrusions 40 project upward and outward in the width direction from both sides of the intermediate support portion 36. The second protrusions 40 are formed with a smaller curvature than the first protrusions 38. The projection height of the second protrusions 40 relative to the first support surface 261 is lower than that of the first protrusions 38. 【0041】 The tip support portion 42 is connected to the tip of the intermediate support portion 36 and the tips of the pair of second protrusions 40. The tip support portion 42 protrudes in an arc shape toward the tip (direction of arrow X1). That is, when viewed from a direction perpendicular to the first support surface 261 shown in Figure 5, the tip support portion 42 of the first support portion 26 is arc-shaped and connects the pair of second protrusions 40. 【0042】 Each of the pair of first protrusions 38 has a pair of bent portions 444 on the base end side of the fixed end 441. Each of the pair of bent portions 444 bends the pair of first protrusions 38 toward the first support surface 261 (intermediate support portion 36) of the first support portion 26 (see Figure 7). As shown in Figure 5, when bending the bent portions 444 of the first support portion 26 to form a pair of first protrusions 38 that bulge outward in a convex shape, it is preferable to bend both ends of the portion of the resin sheet material 26a (see dashed line shape in Figure 5), which becomes the first support portion 26, at the portion of the bent portion 444 at the location of the maximum width Wm in the width direction. 【0043】 When viewed from a direction perpendicular to the first support surface 261 shown in Figure 5, the widthwise spacing W of the pair of bent portions 444 in the first support portion 26 gradually decreases toward the base end direction (arrow X2 direction). That is, in the first support body 32, the pair of bent portions 444 are formed in a tapered shape toward the base end direction. 【0044】 The first support body 32 has a surface 461 facing upward (in the direction of arrow Y) and including the first support surface 261, and a back surface 462 which is the opposite surface of the surface 461. The first support surface 261 is a flat surface that is connected to the upper surface of the base support portion 34, the intermediate support portion 36, and the upper surface of the tip support portion 42. A lubricant may be applied to the first support surface 261 so that the second support portion 50 of the second carrier member 20, which will be described later, can slide smoothly against the first support surface 261. 【0045】 As shown in Figure 2, the second carrier member 20 includes a second shaft 48, a second support portion 50, and a hub 52. 【0046】 The second shaft 48 is a tubular body (in this embodiment, a cylindrical member) having a second lumen 57. The axial length of the second shaft 48 is longer than the axial length of the first shaft 24. The second shaft 48 is inserted into the first lumen 28 of the first shaft 24 (see Figures 1 and 6). In other words, the tip of the second shaft 48 protrudes from the tip opening 53 of the first shaft 24 toward the tip (direction of arrow X1). The base end of the second shaft 48 protrudes from the base end opening of the first shaft 24 toward the base (direction of arrow X2) (see Figure 1). The second shaft 48 extends along the first shaft 24 and is provided so as to be movable along the first shaft 24. Note that the second shaft 48 is not limited to a tubular body and may be other than a tubular body. 【0047】 Alternatively, a spring or other elastic member may be provided between the first lumen 28 of the first shaft 24 and the second shaft 48, so that the second shaft 48 is biased toward the base end (direction of arrow X2) relative to the first shaft 24 by the elastic force of the elastic member. In this configuration, when the user moves the second shaft 48 toward the tip (direction of arrow X1) relative to the first shaft 24, the user's operating force is eliminated, and the second shaft 48 can move toward the base end by the elastic force. 【0048】 The second shaft 48 is configured to conform to the shape of the first support portion 26. The constituent material of the second shaft 48 is selected to be, for example, a material that is more flexible than the constituent material of the first shaft 24. Specifically, examples of constituent materials for the second shaft 48 include polyamide elastomer, polyester elastomer, polyurethane elastomer, polyvinyl chloride, polybutadiene, silicone rubber, and metal coils (including composites with resin). The second shaft 48 is flexible. 【0049】 As shown in Figure 4, the tip region 59 of the second shaft 48 has a curved portion 27 that is curved in the axial direction of the outer cylinder 22. Figure 4 illustrates the case where the tip region 59 of the second shaft 48 has a second curved portion 61, which is the curved portion 27. Therefore, the tip region 59 of the second shaft 48 may be made of a flexible resin material. That is, the tip region 59 of the second shaft 48 is flexible. In this case, the second curved portion 61 can be formed by bending the tip region 59 of the second shaft 48 into the shape shown in Figure 4. The base region of the second shaft 48 may be made of a hard resin material. 【0050】 As described above, when the first shaft 24 is housed inside the outer cylinder 22, the shape of the first shaft 24 is restricted by the inner circumferential surface of the outer cylinder 22, resulting in a straight shape or a shape close to a straight shape (see Figures 11 and 14). Therefore, when the first and second shafts 24 and 48 are housed inside the outer cylinder 22, the shape of the second curved portion 61 housed inside the outer cylinder 22 and the first shaft 24 is restricted by the respective inner circumferential surfaces of the outer cylinder 22 and the first shaft 24. In other words, the shape of the second curved portion 61 housed inside the outer cylinder 22 and the first shaft 24 is either straight or closer to a straight shape than a curved shape (a slightly curved shape) (see Figures 11 and 14). 【0051】 Furthermore, when the tip-side region 59 of the second shaft 48 protrudes from the tip opening 80 of the outer cylinder 22 together with the tip-side region 25 of the first shaft 24, the portion of the second shaft 48 that protrudes from the tip opening 80 of the outer cylinder 22 is curved in relation to the axial direction of the outer cylinder 22 by the elastic restoring force of the second curved portion 61 (see Figures 15 to 19). In this case as well, the degree of curvature of the second shaft 48 with respect to the axial direction of the outer cylinder 22 (the angle of the second shaft 48 with respect to the axial direction) can be adjusted by adjusting the amount of protrusion of the second shaft 48 from the tip opening 80 of the outer cylinder 22. 【0052】 In this embodiment, it is sufficient that the protruding portions of the first and second shafts 24 and 48 from the tip opening 80 of the outer cylinder 22 be curved with respect to the axial direction of the outer cylinder 22. Therefore, in this embodiment, it is sufficient that at least one of the tip-side regions 25 and 59 of the first and second shafts 24 and 48 have a curved portion 27. Furthermore, if the first and second curved portions 29 and 61 are provided, it is desirable that the first and second curved portions 29 and 61 are curved in the same direction with respect to the axial direction of the outer cylinder 22. 【0053】 As shown in Figure 6, the second shaft 48 has a carrier holding portion 54 and a pressing portion 56 formed by the tip of the second shaft 48. The pressing portion 56 is made of an elastic material such as an elastomer. The pressing portion 56 presses the first support portion 26 against the inner surface of the outer cylinder 22 when the first support portion 26 is housed inside the outer cylinder 22. 【0054】 The tip of the carrier holding portion 54 has a pressing surface 58. The carrier holding portion 54 can press the outer peripheral end surface of the medical sheet 300 supported by the first support portion 26 in the direction of the tip (direction of arrow X1) with the pressing surface 58. In this embodiment, the pressing portion 56 is provided with a carrier holding portion 54 that supports the second support portion 50. The carrier holding portion 54 includes a pressing surface 58 and a mounting hole 60. The carrier holding portion 54 is formed to be wider towards the tip when viewed from above. The carrier holding portion 54 is formed in a trapezoidal shape when viewed from above. In a cross section perpendicular to the axis of the second shaft 48 shown in Figure 7, the carrier holding portion 54 has a shape that is symmetrical with respect to a virtual line L1 that passes through the center line C of the carrier holding portion 54 and is parallel to the width direction of the carrier holding portion 54. In other words, the carrier holding portion 54 is symmetrical in the vertical direction with respect to the virtual line L1. 【0055】 Specifically, in a cross-section perpendicular to the axis of the second shaft 48, the cross-section of the carrier holding portion 54 has a pair of straight sections 621 and 622 perpendicular to the axis of the second shaft 48, and a pair of convex sections 641 and 642 positioned on both sides of the pair of straight sections 621 and 622 and convex in a direction away from the straight sections 621 and 622 (outward in the width direction). The convex sections 641 and 642 are formed in a circular arc shape in cross-section. The first length D1 (width dimension) of the carrier holding portion 54 along the extending direction of the straight sections 621 and 622 is greater than the second length D2 (thickness dimension) of the carrier holding portion 54 perpendicular to the extending direction. That is, the carrier holding portion 54 has a flattened cross-section. Note that the carrier holding portion 54 is not limited to being formed in a flattened cross-section, and may be formed in, for example, a circular cross-section, an elliptical cross-section, a square cross-section, a rectangular cross-section, etc. Alternatively, instead of the convex portions 641 and 642, the carrier holding portion 54 may be provided with a recessed structure such that the first support portion 26 is pressed against the inner surface of the outer cylinder 22 when the first support portion 26 is housed inside the outer cylinder 22. 【0056】 When the first support portion 26 is housed in the lumen 78 of the outer cylinder 22 together with the pressing portion 56, the width (first length D1) of the pressing portion 56 is set such that the first support portion 26 is pushed toward the lumen 78 of the outer cylinder 22 by both ends of the pressing portion 56 in the width direction (a pair of convex portions 641, 642). The first length D1 of the pressing portion 56 is set to be equal to, or slightly larger than, the inner diameter of the outer cylinder 22 (the diameter of the lumen 78). Due to the thickness of the first support portion 26, the first length D1 of the pressing portion 56 may be set to be slightly smaller than the inner diameter of the outer cylinder 22. 【0057】 In Figure 6, the pressing surface 58 is provided on the front end surface of the carrier holding portion 54. A mounting hole 60 is opened in the pressing surface 58. The second support portion 50 is attached to the pressing surface 58. The pressing surface 58 presses the outer peripheral end surface of the medical sheet 300 toward the front end (direction of arrow X1) (see Figure 17). The pressing surface 58 is a flat surface perpendicular to the axis of the carrier holding portion 54. The pressing surface 58 may also be provided with a supply hole (not shown) that allows liquid (e.g., physiological saline) to be supplied toward the front end of the second shaft 48 via the second lumen 57 of the second shaft 48. The liquid is, for example, for priming or wetting. 【0058】 The mounting hole 60 opens into the pressing surface 58 of the carrier holding portion 54. The mounting hole 60 is positioned on the center line C of the carrier holding portion 54 on the pressing surface 58. The mounting hole 60 is slit-shaped and extends from the center line C parallel to the width direction of the carrier holding portion 54. The mounting hole 60 is symmetrical in the width direction with respect to the center line C. The mounting hole 60 extends axially from the pressing surface 58. A part of the second support portion 50 is inserted into and connected to the mounting hole 60. 【0059】 In Figures 2, 5, and 6, the second support portion 50 is constructed as a flexible sheet. The second support portion 50 has a second joint portion 70 and a second support body 72. The second joint portion 70 is provided at the base end of the second support portion 50. The second joint portion 70 is provided at the base end of the second support body 72. The second joint portion 70 is inserted into the mounting hole 60 of the carrier holding portion 54 and, for example, is bonded. The second joint portion 70 may also be bonded to the mounting hole 60 of the carrier holding portion 54 by an appropriate bonding method other than bonding. Alternatively, the second support portion 50 may be molded integrally with the carrier holding portion 54. 【0060】 The second support body 72 extends from the second joint 70 toward the tip (direction of arrow X1). The length of the second support body 72 extending from the second joint 70 is shorter than the length of the first support body 32 extending from the first joint 30. A second support surface 74 for placing the medical sheet 300 is provided on the upper surface of the second support body 72. The second support surface 74 is a flat surface. The second support body 72 is smaller than the first support body 32. That is, the area of ​​the second support surface 74 is smaller than the area of ​​the first support surface 261. 【0061】 As shown in Figure 5, the base end of the second support body 72 is formed to be narrower in the direction of the base end (arrow X2 direction). The intermediate portion of the second support body 72 between the tip and the base end extends with substantially constant width. The tip of the second support portion 50 protrudes in an arc shape in the direction of the tip (arrow X1 direction). Lubricant may be applied to both sides (bottom and top surfaces) of the second support body 72. 【0062】 In Figure 2, the hub 52 is attached to the base end of the second shaft 48. 【0063】 In Figures 1 and 2, the outer cylinder 22 is a cylindrical member having a lumen 78. The lumen 78 has a tip opening 80 that opens at the tip of the outer cylinder 22 (the end in the direction of arrow X1). The lumen 78 also opens at the base end of the outer cylinder 22 (the end in the direction of arrow X2). The outer cylinder 22 is flexible. The constituent material of the outer cylinder 22 is the same material as the constituent material of the first shaft 24 described above. 【0064】 The first shaft 24 is inserted through the lumen 78 of the outer cylinder 22. The axial length of the outer cylinder 22 is shorter than the axial length of the first shaft 24. In Figures 5 and 6, the inner diameter of the outer cylinder 22 is smaller than the width of the intermediate support portion 36. The width of the intermediate support portion 36 is substantially the same as, or less than, the circumferential length of the inner surface of the outer cylinder 22, so that the first support portion 26 can be housed inside the outer cylinder 22 in a cylindrical shape along the circumferential direction of the inner surface of the outer cylinder 22. An airtight valve body 84 is provided at the base end of the outer cylinder 22, which is in close contact with the outer surface of the first shaft 24. 【0065】 In Figures 2 and 6, the tip surface of the outer cylinder 22 extends along a direction perpendicular to the axial direction of the outer cylinder 22. 【0066】 As shown in Figure 2, the endoscope 14 has a long endoscope body 86. The tip of the endoscope body 86 is fixed to the outer circumferential surface of the outer cylinder 22 by a fixing member 16 (see Figure 1). The objective lens 88 provided on the tip surface of the endoscope body 86 is oriented toward the tip of the outer cylinder 22 (direction of arrow X1). The tip of the endoscope body 86 is fixed to the axial middle part of the outer cylinder 22. However, the tip of the endoscope body 86 may also be fixed to the tip of the outer cylinder 22. 【0067】 The fixing member 16 includes, for example, a fixing cylinder 90 and a fixing tube 92. The fixing cylinder 90 is made of, for example, a rigid resin material. The endoscope body 86 can be inserted into the lumen of the fixing cylinder 90. The fixing cylinder 90 is positioned along the longitudinal direction of the outer cylinder 22. The fixing tube 92 is a tube for fixing the fixing cylinder 90 to a predetermined position on the outer cylinder 22. The fixing tube 92 is, for example, a heat shrink tubing. The outer cylinder 22 and the fixing cylinder 90 may be integrally molded products. However, the method of fixing the tip of the endoscope body 86 to the outer cylinder 22 can be set as appropriate. 【0068】 The movement restricting section 23 can restrict the relative axial movement between the first shaft 24 and the second shaft 48. The movement restricting section 23 consists of a carrier holding section 54 (pressing section 56) formed by the tip of the second shaft 48. With the first support section 26 housed inside the outer cylinder 22, the carrier holding section 54 presses the first support section 26 against the inner surface (lumen 78) of the outer cylinder 22, thereby constraining the relative displacement between the first support section 26 and the second shaft 48. As a result of the constraint on the relative movement between the first support section 26 and the second shaft 48, the relative axial movement between the first shaft 24 and the second shaft 48 is restricted (see Figure 12). 【0069】 Next, a method for transferring the medical sheet 300 to the treatment area of ​​a living organism will be described. Specifically, as shown in Figures 14 to 19, a method for transferring the medical sheet 300 to the transplant target area 402 (the treatment area of ​​the living organism) of the heart 400 by thoracoscopic surgery will be described. As shown in Figure 8, the transfer method according to this embodiment includes a preparation step, a sheet placement step, a storage step, a placement step, a deployment step, a movement step, and a removal step. 【0070】 First, in the preparation step (step S1), the transfer device 10 according to the present embodiment described above is prepared. In the following description, the state shown in Figure 1 will be referred to as the initial state of the transfer device 10. In the initial state, the first and second shafts 24 and 48 are moved toward the tip (direction of arrow X1) relative to the outer cylinder 22, and the first support part 26 and the second support part 50 are in a protruding position (second position) where they protrude toward the tip from the tip opening 80 of the outer cylinder 22. Each of the first and second support parts 26 and 50 is unfolded by being exposed toward the tip from the outer cylinder 22, and the second support part 50 is positioned on the first support surface 261 of the first support part 26. That is, the second support part 50 is positioned in a retracted position overlapping the first support surface 261 of the first support part 26. At this time, the base end of the carrier holding part 54 is inserted into the first lumen 28 of the first shaft 24. 【0071】 Therefore, in the preparation process, the tip-side regions 25 and 59 of the first and second shafts 24 and 48 (see Figures 3 and 4) do not protrude from the tip opening 80 of the outer cylinder 22 (see Figures 1, 5, 9, and 10). As a result, the shape of the curved portion 27 (first curved portion 29, second curved portion 61) housed within the outer cylinder 22 is restricted by the inner circumferential surface of the outer cylinder 22. That is, the curved portion 27 is held in a straight shape, or in a shape closer to a straight shape than a curved shape (a slightly curved shape). 【0072】 Next, in the sheet placement process (step S2), as shown in Figure 9, the medical sheet 300, which is located in the petri dish 401, is placed on the second support surface 74. As shown in Figure 10, the medical sheet 300 extends outward from the second support portion 50 when placed on the second support surface 74. The first support surface 261 supports the protruding portion 302 of the medical sheet 300 that extends outward from the second support portion 50. The pair of second protrusions 40 suppress movement (misalignment) of the medical sheet 300 in the width direction of the intermediate support portion 36 when the medical sheet 300 is placed on the second support surface 74. 【0073】 Subsequently, in the storage process (step S3 in Figure 8), the medical sheet 300 is placed in a storage position (first position) inside the outer cylinder 22 together with the first support part 26 and the second support part 50. Specifically, the first shaft 24 of the first carrier member 18 and the second shaft 48 of the second carrier member 20 are moved together with respect to the outer cylinder 22 in the direction of the base end (arrow X2 direction). 【0074】 As a result, the base support portion 34 is pulled in from the tip opening 80 of the outer cylinder 22 toward the base end. At this time, the tapered sides of the base support portion 34 come into contact with the tip opening 80 of the outer cylinder 22, causing a force to act on the base support portion 34 that causes it to curl along the circumferential direction of the outer cylinder 22. Therefore, the base support portion 34 is smoothly pulled into the outer cylinder 22 while curling. At this time, the first support portion 26 is housed inside the outer cylinder 22 while curling into a conical shape such that the tip side has a larger diameter and the base support portion 34 has a smaller diameter. 【0075】 When the base support portion 34 deforms, a force acts on the intermediate support portion 36 that causes it to curl along the circumferential direction of the outer cylinder 22, so the intermediate support portion 36 is pulled into the outer cylinder 22 while curling. At this time, the intermediate support portion 36 deforms into a cylindrical shape along the inner surface of the outer cylinder 22. Each of the pair of first protrusions 38 curves so that the surface 461 of the first support portion 26 is inward and the back surface 462 of the first support portion 26 is outward, so that the fixed end 441 is drawn inward. As shown in Figure 13, the back surfaces 462 of the intermediate portions 443 that bulge outward in a convex shape in the radial direction come into contact with each other on a virtual line L2 that extends perpendicular to the central axis of the outer cylinder 22. The intermediate portion 443 of one first protrusion 38 and the intermediate portion 443 of the other first protrusion 38 come into contact and are housed downward (towards the first support surface 261 and surface 461). 【0076】 As a result, the back surface 462 of the first support portion 26 becomes a curved shape that closely adheres to the inner surface of the outer cylinder 22, and each first protrusion 38 curves further, folding back from the fixed end 441 to the free end 442 toward the center of the outer cylinder 22, so that the pair of free ends 442 are positioned below the central axis of the outer cylinder 22. In other words, the first support portion 26 curves in a heart shape along the inner surface of the outer cylinder 22. 【0077】 A heart shape refers to a roughly circular shape consisting of a convex curved shape on one side and two convex curved shapes on the opposite side. When a heart shape is formed in the lumen 78 of a tubular body (outer cylinder 22), the two convex curved shapes that protrude outwards along the inner surface of the tubular body approach each other, and some of their circumferential surfaces come into contact with each other, resulting in an overall outline that is roughly circular along the inner surface of the tubular body (see the shape of the first support part 26 in Figure 13). 【0078】 As the first support portion 26 undergoes curvature deformation, the second support portion 50 similarly curves along the first support portion 26 on its inner side (surface 461 side). As the first and second support portions 26 and 50 curve, the medical sheet 300 deforms into a shape corresponding to the shapes of the first and second support bodies 32 and 72, and the medical sheet 300 is housed inside the outer cylinder 22. The housing process is completed when the entire first support portion 26 is completely inserted into the outer cylinder 22, as shown in Figure 11. 【0079】 In the housing state in which the first support portion 26, the second support portion 50, and the medical sheet 300 are housed inside the outer cylinder 22, as shown in Figure 13, the pair of first protrusions 38 are positioned towards the tip (direction of arrow X1) of the pressing surface 58 of the pressing portion 56 with their back surfaces 462 in contact with each other (see Figure 11). 【0080】 Furthermore, in the sheet placement and storage processes, similar to the preparation process, the curved portions 27 (first curved portion 29, second curved portion 61) housed within the outer cylinder 22 are held in a straight shape, or in a shape closer to a straight shape than a curved shape (see Figures 9 to 11). 【0081】 Subsequently, in the placement step (step S4 in Figure 8), as shown in Figure 14, the trocker 411 is inserted into the pleural cavity 410 through the incision 409 in the chest 408. Next, the user inserts the transfer device 10 into the pleural cavity 410 through the trocker 411. This positions the tip of the transfer device 10 near the target site 402 in the heart 400, and also positions the tip of the endoscope 14 inside the pleural cavity 410. Before inserting the transfer device 10 into the pleural cavity 410, a liquid supply device (not shown) may be connected to the connection port of the hub 52 to introduce liquid (e.g., saline solution). 【0082】 Next, in the unfolding process (step S5 in Figure 8), the first support part 26, the second support part 50, and the medical sheet 300 are unfolded as shown in Figure 15. Specifically, in the unfolding process, the first shaft 24 is grasped and moved toward the tip (direction of arrow X1) relative to the outer cylinder 22. As a result, the valve body 55 of the first shaft 24 causes the second shaft 48 to move integrally toward the tip (direction of arrow X1) together with the first shaft 24. At this time, the first shaft 24 and the second shaft 48 move integrally toward the tip via the movement restricting part 23. Then, the first support part 26, which has been exposed from the tip opening 80 of the outer cylinder 22, returns to its original shape due to the restoring force. In the second position where the first support part 26 has been unfolded, the second support part 50 and the medical sheet 300 spread out into a planar shape. 【0083】 In the deployment process, the entire second support surface 74 on which the medical sheet 300 is placed is positioned on the first support surface 261 of the second carrier member 20. At this time, the medical sheet 300 is supported by the first support surface 261 and the second support surface 74. This prevents wrinkles from forming on the protruding portion 302 of the medical sheet 300 before it is transferred to the transplant target portion 402 of the heart 400. 【0084】 Next, in the moving process (step S6 in Figure 8), the user further moves the first shaft 24 toward the tip (direction of arrow X1) relative to the outer cylinder 22. As a result, the first and second shafts 24 and 48 protrude toward the tip (direction of arrow X1) from the tip opening 80 of the outer cylinder 22 (see Figure 16). 【0085】 As described above, the tip regions 25 and 59 of the first and second shafts 24 and 48 each have a curved portion 27 (first curved portion 29, second curved portion 61) (see Figures 3 and 4). Therefore, as shown in Figure 16, when the first and second shafts 24 and 48 protrude in the tip direction from the tip opening 80 of the outer cylinder 22, the portions of the first and second shafts 24 and 48 that protrude from the tip opening 80 of the outer cylinder 22 curve in the axial direction of the outer cylinder 22 due to the elastic restoring force of the curved portion 27. As a result, the first and second shafts 24 and 48 protrude in a curved manner from the tip opening 80 of the outer cylinder 22 toward the transplant target portion 402. In this case, the degree of curvature (angle with respect to the axial direction) of the first and second shafts 24 and 48 relative to the axial direction of the outer cylinder 22 can be adjusted by adjusting the amount of protrusion of the first and second shafts 24 and 48 from the tip opening 80 of the outer cylinder 22. This allows the angle of the first support portion 26 connected to the first shaft 24 relative to the axial direction to be adjusted by adjusting the amount of protrusion of the first and second shafts 24 and 48 from the tip opening 80 of the outer cylinder 22. 【0086】 Furthermore, since the first and second curved portions 29 and 61 are curved in the same direction with respect to the axial direction of the outer cylinder 22, when the first support portion 26 protrudes from the tip opening 80 of the outer cylinder 22, it is possible to prevent the first support portion 26 from rotating around the axial direction of the outer cylinder 22. In other words, it is possible to prevent the first support portion 26 from turning inside out. 【0087】 Next, as shown in Figure 17, by moving the second carrier member 20 toward the tip (arrow X1 direction) relative to the first carrier member 18, the second support portion 50 on which the medical sheet 300 is placed moves from the retracted position to the extended position, and the second support portion 50 protrudes further toward the tip (arrow X1 direction) than the tip of the first support portion 26. Specifically, the second shaft 48 is moved toward the tip relative to the first shaft 24. 【0088】 As a result, the second support portion 50 moves toward the tip (direction of arrow X1) relative to the first support portion 26. At this time, when the pressing surface 58 of the carrier holding portion 54 (pressing portion 56) presses the outer peripheral end surface of the medical sheet 300 toward the tip, the entire medical sheet 300 is positioned toward the tip more than the first support portion 26. In this movement process, the medical sheet 300 is moved over the transplant target portion 402 of the heart 400 so that the protruding portion 302 of the medical sheet 300 comes into contact with the transplant target portion 402. 【0089】 Subsequently, in the removal process (step S7 in Figure 8), as shown in Figure 18, the second carrier member 20 is moved in the direction of the base end (arrow X2 direction), thereby pulling the second support member 50 out from between the transplant target 402 and the medical sheet 300. As a result, the entire medical sheet 300 comes into contact with the surface of the transplant target 402. This completes the transfer of the medical sheet 300 to the transplant target 402. 【0090】 Next, as shown in Figure 19, the second carrier member 20 is moved further in the base direction (arrow X2 direction) to the first position. As a result, the first support part 26 and the second support part 50 are housed inside the outer cylinder 22. Finally, the transfer device 10 is removed from the chest 408 by pulling it out of the trocker 411. 【0091】 This embodiment provides the following effects. 【0092】 As shown in Figures 1 and 2, the transfer device 10 includes a second carrier member 20 that is axially movable relative to the first carrier member 18. Therefore, the medical sheet 300 can be transferred from the first support part 26 to the target part 402 of the living body using the second carrier member 20 without using other devices (such as forceps). This allows for efficient transfer of the medical sheet 300 to the target part 402. 【0093】 Furthermore, as shown in Figures 3 and 4, the portions of the first and second shafts 24 and 48 that protrude from the tip opening 80 of the outer cylinder 22 are curved with respect to the axial direction of the outer cylinder 22, so that the first and second shafts 24 and 48 can be curved at a position close to the first support portion 26 that holds the medical sheet 300 (see Figure 16). This makes it possible to adjust the angle of the first support portion 26 with respect to the axial direction of the outer cylinder 22 inside the body when inserting the outer cylinder 22 into the body and transferring the medical sheet 300 to the treatment target area of ​​the body (the transplant target area 402 of the heart 400). As a result, the medical sheet 300 held by the first support portion 26 with its angle adjusted can be easily transferred to the transplant target area 402 (see Figure 17). 【0094】 Furthermore, as shown in Figures 3 and 4, since the first and second curved portions 29 and 61 are curved in the same direction, the portions of the first and second shafts 24 and 48 that protrude from the tip opening 80 of the outer cylinder 22 can be curved in the same direction relative to the axial direction of the outer cylinder 22 by the elastic restoring force of the first and second curved portions 29 and 61 (see Figure 16). This prevents the first support portion 26 from rotating around the axial direction of the outer cylinder 22 when it protrudes from the tip opening 80 of the outer cylinder 22. As a result, the medical sheet 300 held by the first support portion 26 can be reliably transferred to the treatment target (transplant target 402) (see Figure 17). 【0095】 As shown in Figure 1, the tip of the second shaft 48 is provided with a sheet-like second support portion 50, which includes a second support surface 74 capable of holding the medical sheet 300. The second support portion 50 is movable relative to the first support portion 26 between a retracted position that overlaps the first support surface 261 and an extended position that is located further forward (in the direction of arrow X1) than the first support surface 261. With this configuration, the medical sheet 300 can be moved along the first support surface 261 of the first support portion 26 by the second support portion 50 having the second support surface 74. 【0096】 As shown in Figure 7, the first support portion 26 is formed from a flexible sheet having a surface 461 and a back surface 462. The first support portion 26 has a pair of first protrusions 38 that project upward from both sides in the width direction of the first support surface 261, perpendicular to the direction of movement of the first shaft 24. With this configuration, when the first support portion 26 is housed in the outer cylinder 22, the back surfaces 462 of the pair of first protrusions 38, which have curved and deformed into a convex shape, come into contact with each other. The pair of first protrusions 38 are displaced toward the first support surface 261, causing the support portion to curve and deform into a heart shape (see Figure 13). As a result, the first support portion 26 can be housed in a heart shape within the outer cylinder 22, and damage to the medical sheet 300 held by the first support portion 26 can be effectively suppressed compared to when the first support portion 26 is deformed into a shape other than a heart shape. Furthermore, since the first support portion 26 can be smoothly and compactly housed within the outer cylinder 22, the diameter of the outer cylinder 22 can be reduced compared to a configuration in which the first support portion 26 does not bend or deform into a heart shape. 【0097】 As shown in Figure 12, when the first support portion 26 is housed inside the outer cylinder 22, the movement restricting portion 23 causes the tip of the second shaft 48 to come into contact with the first support portion 26, thereby preventing relative axial movement between the first shaft 24 and the second shaft 48. As a result, even if a user accidentally tries to move the second carrier member 20 towards the tip (arrow X1 direction) before the first support portion 26 reaches the second position where it protrudes from the tip of the outer cylinder 22, the second carrier member 20 will not move relative to the first carrier member 18 in the axial direction. Specifically, even if a user accidentally grasps the second carrier member 20 and pushes it towards the tip, neither the first carrier member 18 nor the second carrier member 20 will move towards the tip relative to the outer cylinder 22. However, when a user accidentally grasps the second carrier member 20 and pushes it towards the tip, the first carrier member 18 may also move towards the tip relative to the outer cylinder 22 along with the second carrier member 20. In this case as well, the second carrier member 20 does not move relative to the first carrier member 18 in the axial direction. As a result, the second support portion 50 and the medical sheet 300 are prevented from protruding from the tip opening 80 of the outer cylinder 22. This prevents the medical sheet 300 housed inside the outer cylinder 22 from being pressed and damaged by the tip of the second shaft 48. Therefore, the medical sheet 300 can be efficiently transported to the transplant target portion 402 without being damaged. 【0098】 As shown in Figures 1, 2, 5, and 6, the movement restricting portion 23 is a pressing portion 56 that constitutes the tip of the second shaft 48. With the first support portion 26 housed inside the outer cylinder 22, the pressing portion 56 presses the first support portion 26 against the inner surface 78 of the outer cylinder 22. As a result, the pressing portion 56 and the first support portion 26 that constitute the movement restricting portion 23 are in close contact with each other in the radial direction, thus constraining the relative displacement between the first support portion 26 and the second shaft 48. With the first support portion 26 protruding from the tip of the outer cylinder 22, the second shaft 48 can be moved axially relative to the first shaft 24. 【0099】 Since the pressing portion 56 is formed from an elastic material, it is possible to effectively bring the pressing portion 56 into close contact with the first support portion 26. When the pressing portion 56 is housed inside the outer cylinder 22, even if the second shaft 48 pushes in the direction of the tip (arrow X1 direction), the second shaft 48 bends, making it difficult for the pressing force to be transmitted to the pressing portion 56, so the user can easily notice any incorrect operation. 【0100】 As shown in Figure 7, in a cross-section perpendicular to the axis of the second shaft 48, the pressing portion 56 has a pair of straight portions 621, 622 and a pair of convex portions 641, 642 provided on both sides of the pair of straight portions 621, 622. The first length D1 along the extending direction of the straight portions 621, 622 is longer than the second length D2. As a result, when the first support portion 26 is housed in the outer cylinder 22, the pair of convex portions 641, 642 provided on both sides of the straight portions 621, 622 push the first support portion 26 toward the outer cylinder 22, thereby making the first support portion 26 and the carrier holding portion 54 more tightly fitted together. 【0101】 As shown in Figure 11, in the housing position (first position), the second support portion 50 is housed inside the outer cylinder 22 by bending and deforming together with the first support portion 26. With this configuration, even if the second support portion 50 has a width dimension, it is possible to suitably house the second support portion 50 together with the first support portion 26 inside the outer cylinder 22 during the housing process. 【0102】 As shown in Figure 2, the tip of the second shaft 48 is provided with a carrier holding portion 54 that holds the base end of the second support portion 50. Unlike this embodiment, if the carrier holding portion 54 is not vertically symmetrical and the second support portion 50 is held at the lower end of the carrier holding portion 54, the user rotates the second shaft 48, reversing the vertical direction of the second support portion 50, and the second support portion 50 is positioned above the carrier holding portion 54. In this case, the second support portion 50 lifts up relative to the first support surface 261 of the first support portion 26, and the first support portion 26 and the second support portion 50 separate in the vertical direction. 【0103】 In contrast, in this embodiment, as shown in Figure 7, the carrier holding portion 54 is formed symmetrically (up and down symmetrically) with respect to the center line C of the carrier holding portion 54 in a cross section perpendicular to the axis of the second shaft 48. Furthermore, the carrier holding portion 54 holds the second support portion 50 on the center line C. Therefore, even if the vertical direction of the second support portion 50 is reversed by the user rotating the second shaft 48, the lifting of the second support portion 50 from the first support surface 261 of the first support portion 26 can be suppressed compared to a configuration in which the second support portion 50 is held at the lower end of the carrier holding portion 54. As a result, the medical sheet 300 can be stably implanted by the second support portion 50. 【0104】 As shown in Figure 7, in a cross-section perpendicular to the protruding direction of the first protrusion 38 and perpendicular to the first support surface 261, each cross-section of the first protrusion 38 has a shape in which the intermediate portion 443, which forms the space between the free end 442 and the fixed end 441 of the first protrusion 38, bulges out in a convex shape toward the direction away from the first support surface 261. With this configuration, when the first support portion 26 is housed in the outer cylinder 22, the first support portion 26 can be reliably curved into a heart shape. This prevents damage to the medical sheet 300 caused by the first support portion 26 deforming into a shape other than a heart shape. 【0105】 Unlike this embodiment, if the intermediate portion 443 on the back surface 462 of the first support portion 26 is curved so as to be recessed toward the first support surface 261, it is rare but possible that the first support portion 26 will not bend into an appropriate heart shape within the outer cylinder 22. For example, the free end 442 (front surface 461) of one first protrusion 38 may ride up onto the fixed end 441 (back surface 462) of the other first protrusion 38 that has been curved, causing the free end 442 to bend in a V-shape toward the inner surface of the outer cylinder 22. In this embodiment, since the intermediate portion 443 is convexly bulging toward the direction away from the first support surface 261, it is possible to prevent the first support portion 26 from bending in a V-shape. 【0106】 By forming the intermediate portion 443 of the pair of first protrusions 38 in an arc shape, the first protrusions 38 having an outward-bulging shape can be easily formed. 【0107】 As the curvature R of the intermediate portion 443 of the first projection 38 increases toward the base end direction of the first support portion 26 (direction of arrow X2), the widthwise spacing W between the first projections 38 at the tip end of the first projection 38 can be widened. This makes it easier to place the medical sheet 300 on the first support surface 261 of the first support portion 26 through the tip support portion 42. 【0108】 As shown in Figure 5, the distance W between the pair of bent portions 444 in the width direction of the first support portion 26 decreases toward the base end. Therefore, when the first support portion 26 is housed in the outer cylinder 22 from the base end side, the pair of first protrusions 38 can be suitably curved into a conical shape by contact with the outer cylinder 22. Consequently, interference between the base ends of the pair of bent portions 444 is suppressed, allowing the first support portion 26 to be smoothly housed in the outer cylinder 22 from the base end side. 【0109】 As shown in Figure 5, when viewed from a direction perpendicular to the first support surface 261, the tip of the first support portion 26 is arc-shaped, connecting the pair of second protrusions 40. Compared to a configuration in which the tip of the first support portion 26 has a corner, this reduces the sliding resistance between the first support portion 26 and the outer cylinder 22 when the first support portion 26 is housed inside the outer cylinder 22. When moving the first support portion 26 in the direction of the tip (arrow X1 direction) and placing the medical sheet 300 on the first support portion 26, the work can be performed smoothly by gradually inserting the first support portion 26 into the interface between the medical sheet 300 and the petri dish 401 (container). 【0110】 As shown in Figure 20, the transfer device 100 according to the first modified example includes a movement restricting section 102. In this modified example, the same reference numerals are used for components identical to those of the transfer device 10 described above, and detailed explanations of identical components are omitted. The same applies to the transfer devices 120, 130, 150, and 160 according to the second to fifth modified examples described later. 【0111】 The movement restricting section 102 includes a first fitting section 104 provided on the first support section 26 and a second fitting section 106 provided on the carrier holding section 54 at the tip of the second shaft 48. 【0112】 The first fitting portion 104 has a pair of first protrusions 1081 and 1082 that project upward from the first support surface 261 of the first support portion 26. Each of the first protrusions 1081 and 1082 is positioned at an equidistant distance from the widthwise center of the first support portion 26. When viewed from a direction perpendicular to the widthwise direction of the first support portion 26, the cross-section of the first protrusions 1081 and 1082 is, for example, rectangular. The cross-section of the first protrusions 1081 and 1082 may be of other shapes (such as semicircular). 【0113】 The second fitting portion 106 is positioned at each of the widthwise ends (convex portions 641, 642) of the carrier holding portion 54 (pressing portion 56). The second fitting portion 106 has recesses 1101, 1102 that are recessed from the outer surfaces of the convex portions 641, 642. The recesses 1101, 1102 are recessed in the widthwise direction from the outer surfaces of the convex portions 641, 642. When viewed from the axial direction of the carrier holding portion 54, the cross-sections of the recesses 1101, 1102 are rectangular, corresponding to the first convex portions 1081, 1082. The cross-sections of the recesses 1101, 1102 may be other shapes (such as semicircular). 【0114】 With the first support portion 26 housed within the outer cylinder 22 and in a curved state, the first protrusions 1081 and 1082 of the first fitting portion 104 constituting the movement restricting portion 102 are fitted into the recesses 1101 and 1102 of the second fitting portion 106, respectively. As a result, the relative displacement between the first support portion 26 and the carrier holding portion 54 is restrained, and consequently, the axial relative movement of the second shaft 48 with respect to the first shaft 24 is restricted. 【0115】 As described above, in the transfer device 100 according to the first modified example, when the first support portion 26 is housed inside the outer cylinder 22 (first position), the first fitting portion 104 and the second fitting portion 106 of the movement restricting portion 102 are fitted together, thereby preventing relative axial movement between the first shaft 24 having the first support portion 26 and the second shaft 48. When the fitting between the first fitting portion 104 and the second fitting portion 106 of the movement restricting portion 102 is released when the first support portion 26 protrudes from the tip of the outer cylinder 22 (second position), the second shaft 48 becomes movable relative to the first support portion 26 in the direction of the tip (arrow X1 direction). 【0116】 As shown in Figure 21A, the transport device 120 according to the second modified example includes a movement restricting section 122. The movement restricting section 122 includes a first engaging section 124 and a second engaging section 126. The first engaging section 124 is provided on the surface 461 of the first support section 26, which includes the first support surface 261. The second engaging section 126 is formed by the carrier holding section 54 at the tip of the second shaft 48. 【0117】 The first engaging portion 124 has a pair of second protrusions 1281 and 1282 that project upward from the first support surface 261. Each of the second protrusions 1281 and 1282 is positioned at an equidistant distance from the widthwise center of the first support portion 26. The second engaging portions 126 are positioned on both sides of the tip of the carrier holding portion 54. 【0118】 As shown in Figure 21B, with the first support portion 26 housed inside the outer cylinder 22 and in a curved state, the second protrusions 1281 and 1282 of the first engaging portion 124 and the second engaging portion 126 face each other in the axial direction of the outer cylinder 22, and the first engaging portion 124 and the second engaging portion 126 are engaged in the axial direction. 【0119】 As described above, in the transfer device 120 according to the second modified example, when the first support portion 26 is housed inside the outer cylinder 22 as shown in Figure 21B (first position), the first engaging portion 124 and the second engaging portion 126 constituting the movement restricting portion 122 are engaged in the axial direction, thereby preventing relative axial movement between the first shaft 24 having the first support portion 26 and the second shaft 48. When the first support portion 26 protrudes from the tip opening 80 of the outer cylinder 22 as shown in Figure 21A (second position), the first support portion 26 unfolds so that the first engaging portion 124 and the second engaging portion 126 do not face each other in the axial direction, and the engagement between the first engaging portion 124 and the second engaging portion 126 is released. As a result, the second shaft 48 can move toward the tip (direction of arrow X1) relative to the first support portion 26. 【0120】 As shown in Figures 22 and 23, the transfer device 130 according to the third modified example includes a first support portion 132. The protrusions 129 provided on both sides in the width direction of the first support portion 132 have an intermediate portion 134 that forms a space between the free end 442 and the fixed end 441. The intermediate portion 134 has a convex shape that bulges out in a direction away from the first support surface 261. The intermediate portion 134 has an intermediate bent portion 136 that is folded in a mountain fold on the back surface 462. The intermediate bent portion 136 is positioned closer to the free end 442 in the intermediate portion 134. 【0121】 As described above, in the transfer device 130 according to the third modified example, by providing an intermediate bent portion 136 on the protruding portion 129 of the first support portion 132, a protruding portion 129 that bulges out in a convex shape toward the direction away from the first support surface 261 can be easily formed. 【0122】 The description has focused on the case where the second support portion 50 is attached to the tip of the second shaft 48, but the invention is not limited to this. For example, the transport device 150 according to the fourth modified example shown in Figure 24 may also have a configuration in which a pressing body 152 is provided at the tip of the second shaft 48. The pressing body 152 has, for example, a flat cross-section with a flat bottom surface. The medical sheet 300 placed on the first support surface 261 of the first support portion 26 can be pressed downwards with the bottom surface of the pressing body 152 to push the medical sheet 300 along the first support surface 261 of the first support portion 26 toward the tip (direction of arrow X1). 【0123】 As shown in Figures 25 and 26, the transfer device 160 according to the fifth modified example may be configured to have a pressing body 162 at the tip of the second shaft 48. The tip of the pressing body 162 has a pressing surface 164. The pressing surface 164 is a flat surface perpendicular to the axis of the pressing body 162. The base end of the pressing body 162 is connected to the tip of the second shaft 48. The medical sheet 300 placed on the first support surface 261 of the first support part 26 can be pressed by the pressing surface 164 of the pressing body 162 and pushed out along the first support surface 261 of the first support part 26 in the direction of the tip (arrow X1 direction). 【0124】 Furthermore, the present invention is not limited to the disclosure described above, and can take various configurations without departing from the spirit of the invention. [Explanation of Symbols] 【0125】 10, 100, 120, 130, 150, 160...transfer equipment 18…First carrier member 20…Second carrier member 22…Outer cylinder 23, 102, 122... Movement control department 24…First shaft 25, 59...Tip side area 26, 132...first support part 27... Curved section 29...First curved section 48...Second shaft 61...Second curve 80...Tip opening 261...1st support surface 300... Medical sheet 402...Part to be transplanted

Claims

[Claim 1] A transfer device for transferring a medical sheet to a part of a living body to be treated, Outer cylinder and A first carrier member having a tubular first shaft extending in the axial direction of the outer cylinder and arranged to be movable along the axial direction inside the outer cylinder, and a sheet-like support portion arranged at the tip of the first shaft and including a support surface capable of holding the medical sheet, A second carrier member having a second shaft that extends within the first shaft and is movable along the first shaft, Equipped with, In a first position where the first and second shafts are moved in the base end direction relative to the outer cylinder so that the support portion is housed within the outer cylinder, the support portion is housed within the outer cylinder in a curved and deformed state. In a second position where the first and second shafts are moved toward the tip relative to the outer cylinder so that the support portion protrudes from the tip opening of the outer cylinder, the support portion unfolds by being exposed toward the tip from the outer cylinder. The tip region of at least one of the first and second shafts has a curved portion that is curved in the axial direction, When the first and second shafts are in the first position, the curved portion housed within the outer cylinder is either straight or closer to a straight shape than the curved shape. A transfer device wherein, when the first and second shafts are in the second position, the portions of the first and second shafts that protrude from the tip opening of the outer cylinder are curved in the axial direction by the elastic restoring force of the curved portion. [Claim 2] In the transfer device according to claim 1, The tip region of the first shaft has the first curved portion, which is the curved portion. The tip region of the second shaft has the second curved portion, which is the curved portion. A transfer device in which the first and second curved portions are curved in the same direction with respect to the axial direction. [Claim 3] In the transfer device according to claim 1 or 2, The tip of the second shaft is provided with a sheet-like second support portion, which includes a second support surface capable of holding the medical sheet. A transfer device wherein the second support portion is movable relative to the support portion between a retracted position overlapping the support surface and an extended position located further forward than the support surface. [Claim 4] In the transfer device according to claim 1 or 2, The support portion is formed from a flexible sheet having a surface including the support surface and a back surface which is the opposite surface to the surface. The support portion has a pair of protrusions that project upward from both sides in the width direction of the support surface, perpendicular to the direction of movement of the first shaft. A transfer device in which, at the first position, the support portion is housed inside the outer cylinder in a curved deformation such that both sides of the support portion on the back surface are in contact with each other in the width direction.

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