Caulking device and shaft manufacturing method

Abstract

To provide a caulking device and a shaft manufacturing method with excellent accuracy of a fixing position when fixing a cylindrical body to a shaft member of a catheter.SOLUTION: A caulking device for caulking a cylindrical body to a shaft member of a catheter includes: a first caulking member configured to perform a first caulking for bringing the cylindrical body into a first caulking state; a positioning member configured to perform a positioning operation, the positioning operation including a radial operation and a maintaining operation, the radial operation being performed so as to bring a rear end face of the cylindrical body into contact with the positioning member, the maintaining operation being performed so as to retract the shaft member from the cylindrical body in the contact state to bring the cylindrical body into a positioned state in which it is positioned relative to the shaft member; and a second caulking member which performs a second caulking which brings the cylindrical body into a second caulked state in which it is more strongly caulked than in the first caulking state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a crimping device and a shaft manufacturing method. [Background technology]

[0002] BACKGROUND ART A crimping device is known that crimps a cylindrical body to a shaft member of a catheter (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Patent No. 1,102,7931 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present disclosure is to provide a crimping device and a shaft manufacturing method that provide excellent accuracy in the fixing position when fixing a cylindrical body to a shaft member of a catheter. [Means for solving the problem]

[0005] One aspect of the present disclosure is as follows.

[0006] [1] A crimping device for crimping a cylindrical body to a shaft member of a catheter, a first crimping member configured to perform first crimping by radially sandwiching the cylindrical body through which the shaft member is passed, thereby bringing the cylindrical body into a first crimped state in which the cylindrical body is crimped to the shaft member; a positioning member configured to perform a positioning operation, the positioning member being provided in front of the first crimping member while ensuring a movement path for the shaft member to advance and retreat in the axial direction, the positioning operation including a radial operation in which the positioning member moves radially inward, and a maintaining operation that maintains the position of the positioning member after the radial operation, the radial operation being performed so that a rear end surface of the cylinder in the first crimped state passes forward of the positioning member and then retreats, whereby the rear end surface of the cylinder comes into contact with the positioning member, and the maintaining operation being performed so that the shaft member retreats relative to the cylinder in the abutting state, thereby bringing the cylinder into a positioned state in which it is positioned relative to the shaft member; a second crimping member that is provided in front of the positioning member while ensuring the movement path, and is configured to perform second crimping by radially clamping the cylindrical body in the positioning state and the abutting state to bring the cylindrical body into a second crimped state in which it is crimped more strongly than the first crimped state.

[0007] [2] The crimping device described in [1], wherein the positioning member has a regulating portion that abuts against the front end surface of the cylindrical body so as to regulate the inclination of the cylindrical body relative to the shaft member when the shaft member is advanced and inserted into the cylindrical body.

[0008] [3] The crimping device according to [2], wherein the regulating portion is constituted by a chamfered portion whose diameter decreases toward the front.

[0009] [4] The positioning member is provided so that the restricting portion contacts the entire circumference of the cylindrical body. [3] The crimping device according to claim 1.

[0010] [5] The crimping device according to [3] or [4], wherein the positioning member is provided so that the restricting portion contacts the cylindrical body at at least two points in the circumferential direction.

[0011] [6] The crimping device according to [5], wherein the at least two restricting portions are provided so as to be in contact with the cylindrical body at equal intervals in the circumferential direction.

[0012] [7] A crimping device according to any one of [1] to [6], comprising a guide member arranged rearward of the first crimping member, the guide member having a guide surface that guides the front end of the shaft member toward the cylindrical body when the shaft member moves forward.

[0013] [8] The crimping device according to [7], wherein the guide surface has a truncated cone shape that narrows toward the front.

[0014] [9] A shaft manufacturing method for manufacturing a shaft having the shaft member of the catheter and the tubular body crimped to the shaft member using the crimping device according to any one of [1] to [8], a first crimping step in which the first crimping member performs the first crimping; a positioning step in which the positioning member performs the positioning operation; a second crimping step in which the second crimping member performs the second crimping.

[0015]

[10] an insertion step in which the shaft member is advanced and inserted into the cylindrical body before the first crimping step; The shaft manufacturing method described in [9], wherein the positioning member has a regulating portion that abuts against the front end surface of the cylindrical body during the insertion process so as to regulate the inclination of the cylindrical body relative to the shaft member. [Effects of the Invention]

[0016] According to the present disclosure, it is possible to provide a crimping device and a shaft manufacturing method that provide excellent accuracy in the fixing position when fixing a cylindrical body to a shaft member of a catheter. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a cross-sectional view showing a state during an insertion step in a shaft manufacturing method using a crimping device according to an embodiment of the present disclosure. [Figure 2] 2 is a cross-sectional view showing a state when an insertion step is completed from the state shown in FIG. 1. FIG. [Figure 3] 3 is a cross-sectional view showing a state when a first crimping step is performed from the state shown in FIG. 2. FIG. [Figure 4] 4 is a cross-sectional view showing a state when a positioning step is started from the state shown in FIG. 3. FIG. [Figure 5] 5 is a cross-sectional view showing a state when the radial movement in the positioning step is completed from the state shown in FIG. 4. FIG. [Figure 6] 6 is a cross-sectional view showing a state when the positioning of the cylindrical body is completed in a positioning step from the state shown in FIG. 5. FIG. [Figure 7] 7 is a cross-sectional view showing a state where a second crimping step has been carried out from the state shown in FIG. 6. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0019] 1 to 7, a crimping device 1 according to one embodiment of the present disclosure is a crimping device 1 that crimps a cylindrical body 4 onto a shaft member 3 of a catheter. A catheter is a medical instrument that is introduced into a body cavity of a patient or the like. In this embodiment, the cylindrical body 4 is a marker made of a material (such as a metal) that is opaque to X-rays.

[0020] The crimping device 1 includes a first crimping member 6 (see FIG. 3) configured to perform a first crimping operation in which the cylindrical body 4 inserted through the shaft member 3 is clamped in the radial direction to bring the cylindrical body 4 into a first crimped state in which it is crimped to the shaft member 3, and a positioning member 7 (see FIGS. 4 to 6) configured to perform a positioning operation, the positioning member 7 being provided in front of the first crimping member 6 while ensuring a movement path 5 along which the shaft member 3 advances and retreats in the axial direction, and the positioning operation includes a radial operation (see FIG. 5) in which the positioning member 7 moves radially inward, and a maintaining operation (see FIG. 6) in which the positioning member 7 maintains the position of the positioning member 7 after the radial operation, and the radial operation is performed so that the rear end surface of the cylindrical body 4 in the first crimped state is The positioning member 7 is configured to place the rear end surface of the cylindrical body 4 in an abutting state (see Figure 5) when it passes forward of the positioning member 7 and then retracts, and the maintaining operation is performed by retracting the shaft member 3 relative to the cylindrical body 4 in the abutting state, placing the cylindrical body 4 in a positioned state (see Figure 6) in which it is positioned relative to the shaft member 3; and the second crimping member 8 is configured to be arranged in front of the positioning member 7 while ensuring the movement path 5, and to perform second crimping by radially clamping the cylindrical body 4 in the positioned state and abutting state, placing the cylindrical body 4 in a second crimped state in which it is crimped more strongly than in the first crimped state (see Figure 7).

[0021] In the present application, for convenience of explanation, the direction from the first crimping member 6 toward the second crimping member 8 along the axial direction is referred to as the front, and the opposite direction is referred to as the rear. In this embodiment, the direction along the central axis O of the shaft member 3 is referred to as the axial direction, the direction perpendicular to the central axis O is referred to as the radial direction, and the direction going around the central axis O is referred to as the circumferential direction.

[0022] The first crimping member 6 has a first portion 6a and a second portion 6b on both radial sides that are movable relative to each other, and is configured to perform first crimping by the first portion 6a and the second portion 6b moving radially inward relative to each other on the cylindrical body 4 in a first holding state (see FIGS. 1 to 3) that is held in a first holding space 6c of the first crimping member 6 formed between the first portion 6a and the second portion 6b. The positioning member 7 has a first portion 7a and a second portion 7b on both radial sides that are movable relative to each other, and is configured to perform radial movement by the first portion 7a and the second portion 7b moving radially inward relative to each other, and to perform a maintaining movement by the first portion 7a and the second portion 7b maintaining their relative positions in the radial direction. The second crimping member 8 has a first part 8a and a second part 8b on both radial sides that are movable relative to each other, and is configured to perform a second crimping by causing the first part 8a and the second part 8b to move relative to each other radially inwardly on the cylindrical body 4 in a second holding state (see Figures 5 to 7) held in a second holding space 8c of the second crimping member 8 formed between the first part 8a and the second part 8b.

[0023] The crimping device 1 has a guide member 9 arranged behind the first crimping member 6, and the guide member 9 has a guide surface 9a that guides the front end of the shaft member 3 toward the inside of the cylindrical body 4 in the first holding state when the shaft member 3 moves forward. The guide surface 9a has a truncated cone shape that narrows toward the front, but is not limited to this.

[0024] The first crimping member 6 is configured such that the second portion 6b is movable in both radial directions relative to the first portion 6a in a stationary state, and the first crimping is performed by the second portion 6b moving inward in the radial direction relative to the first portion 6a in a stationary state with respect to the cylindrical body 4 in the first holding state. Note that the first crimping member 6 is not limited to the above configuration, and may be configured such that the first portion 6a and the second portion 6b are movable in both radial directions, and the first crimping is performed by the first portion 6a and the second portion 6b moving inward in the radial direction with respect to the cylindrical body 4 in the first holding state.

[0025] The positioning member 7 is configured such that the first portion 7a and the second portion 7b are movable on both radial sides, the first portion 7a and the second portion 7b move radially inward to perform radial movement, and the first portion 7a and the second portion 7b maintain their radial positions to perform a maintaining movement. Note that the positioning member 7 is not limited to the above configuration, and may be configured such that the second portion 7b is movable on both radial sides relative to the first portion 7a in a stationary state, the second portion 7b moves radially inward relative to the first portion 7a in a stationary state to perform radial movement, and the second portion 7b maintains its radial position relative to the first portion 7a in a stationary state to perform a maintaining movement.

[0026] The second crimping member 8 is configured such that the second portion 8b is movable in both radial directions relative to the first portion 8a in a stationary state, and the second crimping is performed by moving the second portion 8b radially inward relative to the first portion 8a in a stationary state with respect to the cylindrical body 4 in the second holding state. Note that the second crimping member 8 is not limited to the above configuration, and may be configured such that the first portion 8a and the second portion 8b are movable in both radial directions, and the second crimping is performed by moving the first portion 8a and the second portion 8b radially inward with respect to the cylindrical body 4 in the second holding state.

[0027] The first crimping member 6 is configured to hold the cylindrical body 4 in the first holding space 6c by placing the cylindrical body 4 on the first part 6a in a stationary state before the shaft member 3 is passed through it. However, the means for holding the cylindrical body 4 in the first holding space 6c before the shaft member 3 is passed through it is not limited to this.

[0028] The positioning member 7 has a restricting portion 7c that abuts against the front end surface of the cylindrical body 4 when the cylindrical body 4 is placed on the first portion 6a of the first crimping member 6 so as to restrict the inclination of the cylindrical body 4 relative to the shaft member 3 when the shaft member 3 is inserted forward into the cylindrical body 4. In this embodiment, the restricting portion 7c extends over the entire circumference. The restricting portion 7c is provided over half the circumference of the first portion 7a of the positioning member 7 and over half the circumference of the second portion 7b of the positioning member 7. Note that the restricting portion 7c is not limited to a configuration that extends over the entire circumference, and may be provided at two or more locations in the circumferential direction, for example. The restricting portions 7c provided at two or more locations may be arranged at equal intervals. In this embodiment, the restricting portion 7c is formed by a chamfered portion 7c1 that narrows in diameter toward the front. Because the positioning member 7 has a regulating portion 7c, the shaft member 3 is advanced after the cylindrical body 4 is abutted against the regulating portion 7c, and the first crimping is performed in a state where the longitudinal axis (central axis O) of the shaft member 3 and the longitudinal axis of the cylindrical body 4 are parallel or coaxial. This reduces the inclination of the longitudinal axis of the cylindrical body 4 relative to the longitudinal axis of the shaft member 3, and suppresses positional deviation at the position where the first crimping is performed.

[0029] The first crimping member 6 is configured to perform the first crimping by radially clamping the cylindrical body 4 in the first holding state, which is passed through the shaft member 3 and placed on the first portion 6a of the first crimping member 6 and abuts against the restricting portion 7c of the positioning member 7. In this embodiment, the positioning member 7 is configured to perform an opening operation in which the positioning member 7 moves radially outward after the first crimping is performed and before the positioning operation. The opening operation is performed by moving the first portion 7a and the second portion 7b radially outward. The positioning member 7 is configured to perform a radial movement after the opening operation, when the cylindrical body 4 in the first crimped state passes forward of the positioning member 7. After the radial movement, the positioning member 7 moves radially inward, and then a maintaining operation is performed to maintain the position of the positioning member 7. The shaft member 3 retracts together with the cylindrical body 4 in the first crimped state, causing the rear end surface of the cylindrical body 4 to abut against the abutment portion 7d on the front end surface of the positioning member 7 during the maintaining operation. In this state, the shaft member 3 is further moved back, causing the cylindrical body 4 in the first crimped state to slide relative to the shaft member 3 and move relatively to the target position for positioning. The cylindrical body 4 in the positioned state thus achieved is subjected to the second crimping while maintaining the state of abutment against the abutment portion 7d. As a result, the cylindrical body 4 is positioned.

[0030] In this embodiment, the abutment portion 7d of the positioning member 7 extends over the entire circumference in the circumferential direction. The abutment portion 7d is provided over half the circumference of the first portion 7a of the positioning member 7, and is provided over half the circumference of the second portion 7b of the positioning member 7. Note that the abutment portion 7d is not limited to a configuration in which it extends over the entire circumference in the circumferential direction, and may be provided at two or more locations in the circumferential direction, for example. The abutment portions 7d provided at two or more locations may be arranged at equal intervals. In this embodiment, the abutment portion 7d is formed by an annular flat surface 7d1 perpendicular to the axial direction.

[0031] In this embodiment, a catheter shaft 2 having a shaft member 3 and a cylindrical body 4 crimped to the shaft member 3 is manufactured using a crimping device 1.

[0032] The shaft manufacturing method includes a first crimping step in which a first crimping member 6 performs a first crimping operation, a positioning step in which a positioning member 7 performs a positioning operation, and a second crimping step in which a second crimping member 8 performs a second crimping operation.

[0033] The shaft manufacturing method includes an insertion step in which the shaft member 3 advances and is inserted into the cylindrical body 4 before the first crimping step, and the regulating portion 7c of the positioning member 7 abuts against the front end surface of the cylindrical body 4 during the insertion step so as to regulate the inclination of the cylindrical body 4 relative to the shaft member 3.

[0034] The shaft manufacturing method includes a guiding step in which the guide surface 9a of the guide member 9 guides the front end of the shaft member 3 before the inserting step.

[0035] According to this embodiment, the first crimping process increases the ability of the cylindrical body 4 to follow the shaft member 3 before the positioning process is performed, thereby suppressing a decrease in positioning accuracy that occurs when the cylindrical body 4 does not follow the shaft member 3 due to getting caught on the second crimping member 8, etc., when the shaft member 3 retreats during the positioning process.

[0036] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and the above-described embodiments can be modified in various ways without departing from the gist of the present disclosure.

[0037] For example, in the above-described embodiment, the guide member 9 is positioned rearward of the first crimping member 6, and the guiding process and insertion process are performed by advancing the shaft member 3, but this is not limited to this. The guide member 9 may be positioned forward of the second crimping member 8, and the guiding process and insertion process may be performed by retracting the shaft member 3, and the first crimping process and subsequent processes may be performed in the same manner as in the above-described embodiment, and the guide member 9 may have a guide surface 9a that guides the rear end of the shaft member 3 toward the inside of the cylindrical body 4 in the first holding state when retracted. [Explanation of symbols]

[0038] 1 Crimping device 2 shafts 3 Shaft member 4 cylinder 5. Travel Route 6 First crimping member 6a Part 1 6b Part 2 6c 1st holding space 7 Positioning member 7a Part 1 7b Part 2 7c Regulatory Department 7c1 Chamfered part 7d Contact part 7d1 flat surface 8 Second crimping member 8a Part 1 8b Part 2 8c 2nd holding space 9 Guide member 9a Guide surface O center axis

Claims

1. A crimping device for crimping a cylindrical body to a shaft member of a catheter, a first crimping member configured to perform first crimping by radially sandwiching the cylindrical body through which the shaft member is passed, thereby bringing the cylindrical body into a first crimped state in which the cylindrical body is crimped to the shaft member; a positioning member configured to perform a positioning operation, the positioning member being provided in front of the first crimping member while ensuring a movement path for the shaft member to advance and retreat in the axial direction, the positioning operation including a radial operation in which the positioning member moves radially inward, and a maintaining operation that maintains the position of the positioning member after the radial operation, the radial operation being performed so that a rear end surface of the cylinder in the first crimped state passes forward of the positioning member and then retreats, whereby the rear end surface of the cylinder comes into contact with the positioning member, and the maintaining operation being performed so that the shaft member retreats relative to the cylinder in the abutting state, thereby bringing the cylinder into a positioned state in which it is positioned relative to the shaft member; A crimping device having a second crimping member, the second crimping member being arranged in front of the positioning member while ensuring the movement path, and configured to perform second crimping by radially clamping the cylindrical body in the positioning state and the abutting state to bring the cylindrical body into a second crimped state in which it is crimped more strongly than the first crimped state.

2. The crimping device according to claim 1 , wherein the positioning member has a restricting portion that abuts against a front end surface of the cylindrical body so as to restrict inclination of the cylindrical body relative to the shaft member when the shaft member is advanced and inserted into the cylindrical body.

3. The crimping device according to claim 2 , wherein the restriction portion is formed by a chamfered portion whose diameter decreases toward the front.

4. The crimping device according to claim 3 , wherein the positioning member is provided so that the restricting portion contacts the entire circumference of the cylindrical body.

5. The crimping device according to claim 3 , wherein the positioning member is provided so that the restricting portion contacts the cylindrical body at at least two locations in the circumferential direction.

6. The crimping device according to claim 5 , wherein the at least two restricting portions are provided so as to be in contact with the cylindrical body at equal intervals in the circumferential direction.

7. 2. The crimping device according to claim 1, further comprising a guide member arranged rearward of the first crimping member, the guide member having a guide surface that guides the front end of the shaft member toward the cylindrical body when the shaft member advances.

8. The crimping device according to claim 7 , wherein the guide surface has a truncated cone shape whose diameter decreases toward the front.

9. A shaft manufacturing method for manufacturing a shaft having the shaft member of the catheter and the tubular body crimped to the shaft member using the crimping device according to claim 1, comprising: a first crimping step in which the first crimping member performs the first crimping; a positioning step in which the positioning member performs the positioning operation; a second crimping step in which the second crimping member performs the second crimping.

10. an insertion step in which the shaft member is advanced and inserted into the cylindrical body before the first crimping step; The shaft manufacturing method according to claim 9 , wherein the positioning member has a restricting portion that abuts against a front end surface of the cylindrical body so as to restrict inclination of the cylindrical body relative to the shaft member in the inserting step.

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