JP2010509071A - Detonator clamp - Google Patents

Abstract

An object of the present invention is to provide a detonator clamp that attaches an ignition member to a detonator that explodes explosives.
In a detonator mouth clamp 10, a pair of support members 12 and 14 are arranged opposite to both sides of an insertion port of a metal housing and are separated from each other and then returned to an open state, and the support members The three segment bodies 48 engaged with the respective open grooves 42 opened to 12, 14 and restricted in movement, the pointed teeth 53 tapered in the segment bodies 48, and the support members 12, 14 And a biasing member 54 that applies a force for repelling adjacent ones of the plurality of segmented bodies 48 when the closed state is switched from the closed state to the open state. The segment body 48 is displaced so that the teeth 53 enter, and the periphery of the insertion opening of the metal casing is crimped.
[Selection] Figure 1

Description

  The present invention relates to a device and method applied to a detonator that explodes explosives, and in particular, for example, a lead tube, an electric lead wire, a lead wire, or a lead wire inserted into an insertion port of a metal casing of the detonator. The present invention relates to a technique for caulking an ignition member from around.

  An object of the present invention is to provide a detonator mouth clamp that attaches an ignition member to a detonator that explodes explosives.

  A detonator mouth clamp according to the present invention is configured to crimp a periphery of an insertion port of a metal housing into which an ignition member is inserted, and is disposed opposite to both sides of the insertion port and at least one of the two is opposite to the other. Engage with each of the pair of support members that move away from each other and come into a closed state and then return to the open state and one or more opening grooves that open in the support member. And a plurality of adjacently arranged in the closed state, and the inclined surfaces of the adjacent ones in the closed state come into contact with each other, and the tapered surfaces rise from both ends of the bottom surface of the segmented body. Pointed teeth that are tapered toward the center axis of the annular array and arranged in parallel with tooth traces, and the ring as the support member switches from the closed state to the open state. A biasing member that applies a force that repels adjacent ones of the plurality of segmented bodies arranged, and the tip teeth project into the central axis of the annular array. The segment body is displaced, and the periphery of the insertion port of the metal casing arranged coaxially with the central axis is crimped.

  In the detonator mouth clamp, the same number of the segment bodies are arranged on each of the pair of support members. If the number of segments is small, the arrangement of the tip teeth will not be a beautiful circle in the closed state, and if the number is large, the structure will be complicated and the smoothness of movement and economy will be lost. Should be determined.

In the detonator clamp, the number of the plurality of segments arranged in each of the pair of support members is in the range of 2 to 8, preferably in the range of 3 to 5, and usually 3.
In the detonator clamp, one or more of the plurality of segments arranged on each of the pair of support members are further arranged on both sides of the one arranged at the center.
That is, an odd number of 3, 5, or 7 segments are arranged on the support member, and 3 is preferred among them.

In the detonator clamp, at least one of the plurality of segments arranged in each of the pair of support members is fixed to the support member, and the segment bodies located on both sides of the fixed segment are the opening grooves Is engaged.
In the detonator mouth clamp, the plurality of segment bodies arranged on the pair of support members are respectively engaged with the separate opening grooves.

In the detonator clamp, each of the pair of support members is provided with an abutting surface comprising one or more surfaces with which the bottom surface of the segment body abuts.
In the detonator mouth clamp, the bottom surfaces of the segments arranged radially are flat, and the abutting surfaces that abut against the bottom surfaces are formed in multiple faces according to the number of the segment bodies.

In the detonator clamp, an engagement piece that engages with the opening groove that opens in the abutting surface is provided on the bottom surface of the segments arranged radially.
By the way, when the segment body is composed of an odd number, it is not necessary to provide the engaging piece in the central segment body located in the middle. Instead, the bottom surface of the central segment is provided with a perforation that holds the end face of the coil spring that repels the opposing abutment surface.

In the detonator mouth clamp, the urging member is a rubber block held in a holding groove provided on a side surface of the segment bodies arranged radially.
In the detonator mouth clamp, as the pair of support members switch from the open state to the closed state, the rubber block is pressed against the side surface of the adjacent segment body and is entirely accommodated in the holding groove. ing.
In the detonator mouth clamp, the rubber block has a cylindrical shape, and the holding groove is configured so that a cylindrical axis thereof is parallel to a central axis of the annular array.

  In the detonator mouth clamp, the support member has a rectangular parallelepiped shape having a pair of main surfaces perpendicular to the central axis of the annular array, and takes a long side in a direction perpendicular to the moving direction of the support member. The width along the moving direction is configured to be larger than the thickness, and the surface surrounded by the long side and the thickness of the support member forms a pressure contact surface between the pair of support members in the closed state. The surfaces surrounded by the width and the thickness in the above are the end surfaces of the pair of support members in the closed state.

In the detonator clamp, the contact surface provided with the opening groove to be engaged with the engagement piece of the segment body is cut out from the side of the pressure contact surface of the support member to be polygonal from the side of the main surface. It is formed into a shape.
In the detonator mouth clamp, the abutment surface formed in multiple faces is configured in parallel with the central axis of the annular array.

The detonator clamp includes a cover plate that covers the main surfaces on both sides of the support member, holds the segment or biasing member inside the main surface, and restrains the movement in the central axis direction.
In the detonator mouth clamp, the cover plate has a guide groove for guiding a guide piece provided in the segment body, and the segment body is guided by the guide groove and the guide piece.

In the detonator mouth clamp, a positioning piece is provided in one of the pair of supporting members, and a positioning hole for locking the positioning piece is provided in the other supporting member. The positioning piece is locked in the positioning hole, and the positioning piece is removed from the positioning hole in the open state.
In actual use, the detonator is intermittently conveyed in parallel from one to the next toward the central axis between the pair of support members in the open state. An ignition member is inserted into the insertion port of the detonator casing together with a flexible sleeve or a ferrule arranged coaxially. Then, when the pair of support members shift to the closed state, the plurality of annularly arranged segments move toward the central axis, and crimp the outer peripheral surface of the detonator casing disposed coaxially with the central axis. .

The detonator closure method is intermittent so that a plurality of detonators are stationary between a pair of support members facing each other in order to crimp the periphery of the insertion opening of the metal housing into which the ignition member is inserted. And when the pair of support members come close to each other and come into pressure contact with each other to be in a closed state, a plurality of segments arranged in an annular arrangement are oriented coaxially with the central axis and pointed teeth are directed to the detonator casing. The step of moving the segment, the pointed teeth of the segment projecting toward the central axis abutting the outer periphery of the metal housing, and clamping together with the ignition member, and the pair of support members moving in opposite directions, respectively And opening the crimped detonator and placing a new detonator between the support members.
The detonator closing method further includes a step of urging the plurality of segments arranged in an annular arrangement in a direction to separate each other when the closed state is shifted to the open state.

By constructing the method invention in this way, a plurality of detonators arranged in parallel with the central axis of the annular array of segments are intermittently connected between a pair of support members from one direction orthogonal to the central axis. Can be conveyed. Then, at least one of the pair of support members can reciprocate periodically to repeat the open state and the closed state, thereby crimping the detonator casing at an extremely short time interval of about 2 seconds. .
It should be noted that the technical scope of the present invention is not limited to the form for carrying out the invention described later and the description of the drawings.

In the detonator mouth clamp according to the first embodiment of the present invention, a state in which a pair of support members supporting a plurality of segments separated and arranged in an annular shape are separated from each other (open state) is a central axis of the annular arrangement. Sectional drawing facing from the direction. Sectional drawing of the state (closed tightening state) which pressed the detonator mouth clamp shown by FIG. 1 in the press-contact surface which a pair of supporting member mutually opposes. The exploded perspective view which faces the detonator mouth clamp which concerns on 2nd Embodiment of this invention from a downward slanting direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG.1 and FIG.2 has shown 1st Embodiment of the detonator mouth clamp 10 which crimps the ignition member attached to the metal housing | casing of a detonator in an insertion port part (not shown).
The pair of opposing support members 12 and 14 constituting the detonator mouth clamp 10 is a high-strength steel material having a rectangular shape with a length of 120 mm, a width of 40 mm, and a thickness of 20 mm.
Support member 12, 14, and 120 × 40 mm ² of the main surface respectively, the side end face 16 of 120 × 20 mm ^2, will have a terminal end face 18 of the 40 × 10 mm ^2.
1 and 2, the main surfaces of the support members 12 and 14 are shown to be on the same plane. In FIG. 1 showing the open state, the side end surfaces 16 are separated from each other by a distance S, and in FIG. 2 showing the closed state, the side end surfaces 16 are shown as pressure contact surfaces 20 that press the support member 12 and the support member 14 together.

In the present embodiment, the support members 12 and 14 are fixed to a hydraulic reciprocating mechanism (not shown). Then, based on the operation of this reciprocating operation mechanism (not shown), the open state of the detonator mouth clamp 10 shown in FIG. 1 and the closed state of the detonator mouth clamp 10 shown in FIG. 2 are achieved. Then, when the metal casing of the detonator is placed along the side end face 16 opened by the reciprocating operation mechanism and switched to the closed state, the metal casing is crimped and the ignition member is fixed.
The reciprocating motion of the support members 12 and 14 is a direction orthogonal to the side end face 16, that is, a direction indicated by an arrow 22, and a direction in which the detonator is taken in and out is a direction indicated by an arrow 24.

Although not described so as to be misunderstood, the distance between the support members 12 and 14 shown in FIG. 1 is such that the positioning piece 26 (described later) does not interfere with the detonator casing that moves in the direction of the arrow 24. It needs to be set more widely.
In addition, as a reciprocating operation mechanism of the support members 12 and 14, a mechanism that operates by air pressure or a mechanism that operates by a mechanical operation mechanism such as a rotating shaft mechanism can be employed.
The reciprocating mechanism is preferably a mechanism that causes one of the support members 12 and 14 to be stationary and the other to reciprocate.

In the present embodiment, a transport mechanism (not shown) for transporting the detonator is provided below the support members 12 and 14 in which the main surface is in a horizontal position and the side end surface 16 and the end surface 18 are vertically disposed. With this transport mechanism, the detonator is transported between the opposing surfaces of the side end surfaces 16 of the support members 12 and 14 with the insertion port protruding upward.
The transport mechanism intermittently causes the plurality of detonators to be held to flow in the gap between the support members 12 and 14 in the open state one after another in the direction of the arrow 24. This is the normal operation mode of the transport mechanism.

A plurality of detonators carried one after another by this carrying mechanism are held in the direction indicated by the arrow 24 so that only one detonator exists between the side end faces 16 in one open state of the support members 12 and 14. The conveyance speed is determined as appropriate.
Further, the movement of the detonator in the direction of the arrow 24 is synchronized with the reciprocating motion of the support members 12 and 14 that are opened and closed. In other words, the detonator moves in the direction of the arrow 24 in a state where the distance between the support members 12 and 14 is sufficiently open, and stops moving in other states, particularly in a state where there is a possibility of interference with the positioning piece 26. .

As shown in the drawing, the positioning piece 26 is inserted into the perforation 28 of one support member 24, and the screw 30 in which the screw groove 32 is formed is screwed into the axial direction from the base end side. The support member 12 is fastened.
The opposing support member 14 is provided with a positioning hole 34 into which the positioning piece 26 is inserted, and accurately guides the adjacent support members 12 and 14 so that the opposing side end surfaces 16 are in surface contact with each other.

The support members 12 and 14 are provided with notches 36 each having a regular hexagonal shape divided into two equal parts on the side of the side end face 16 facing each other (see particularly FIG. 1). This notch 36 is a contact surface 38 having three substantially C-shaped surfaces, and is a portion where a segment body 48 for caulking the detonator in the closed state is disposed.
The abutment surface 38 is configured such that a vertical bisector of each plane intersects at one point in the cross-sectional view shown in the figure, and a perpendicular to the perpendicular bisector at the intersection is the central axis 40. Yes.

An opening groove 42 is provided on each surface of the contact surface 38.
Each of the opening grooves 42 is positioned on a perpendicular line that is further lowered from the central axis 40 to the contact surface 38 so as to be sandwiched between the main surfaces on both sides of the provided support members 12 and 14.
A perforation 44 is provided in the center surface of the contact surface 38, and a sleeve 46 described later is disposed (see FIG. 2).

In each notch 36, three segment bodies 48 made of high-strength steel are arranged adjacent to each other on both sides of one centered one.
Each segment 48 has an equilateral triangular shape when viewed from the direction of the central axis 40, its bottom surface 49 is close to the contact surface 38, and the slopes 51 on both sides are adjacent to each other in the adjacent segment 48. It is close. The apex tooth 53 located at the apex reduces the distance from the central axis 40 as the opposing support members 12 and 14 are joined to each other as shown in FIG.

The bottom surfaces 49 of the two segment bodies 48 on both sides are always in contact with the contact surface 38 having the opening groove 42.
Engagement pieces 50 screwed so as not to come out are provided on the bottom surfaces 49 of the two segment bodies 48 on both sides. The engagement piece 50 is engaged with the opening groove 42, the bottom surface 49 is slidably contacted with the contact surface 38, and the tip teeth 53 are maintained facing the central axis 40, while the two segment bodies 48 on both sides move. Is regulated.

The segment bodies 48 on both sides held by the notch 36 while being constrained by the opening groove 42 hold the central segment bodies 48 adjacent to each other inside the notch 36.
A partial cylindrical holding groove 52 is provided on one side slope of each segment body 48, and a rubber block 54 (urging member) having a cylindrical shape made of rubber is held in the holding groove 52. .

As shown in FIG. 1, the sleeve 46 includes a compressed coil spring 56, and a perforation 44 provided in the center of the contact surface 38 and a perforation 58 provided in the central segment 48. And are enrolled in each.
Each sleeve 46 is arranged so that the side surface is slidably contacted with the perforation 44 on the contact surface 38 side while the end surface is elastically contacted with the perforation 58 on the center segment 48 side.
The both ends of the coil spring 56 abut against the inner end face of the perforation 58 and the plug 60 fixed by the grab screw 62, and the segment body 48 is repelled from the perforation 44 side.
In FIG. 2, the description of the coil spring 56 is omitted.

Two plastic cover plates are provided to cover the main surfaces on both sides of the support members 12 and 14.
A part of this cover plate is shown by the arrow indicated by reference numeral 64 in FIG.
The cover plate is fixed to the support members 12 and 14 by bolts 66 together with washers 68 at the illustrated positions.
This cover plate protects the entry of contaminants from the outside so that the segment 48 does not move unexpectedly in the direction of the central axis 40, and the rubber block 54 does not deform unexpectedly. It is.

  As shown in FIG. 2, when the opposing side end surfaces 16 of the support members 12 and 14 are pressed against each other to form the press contact surface 20, the bottom surface 49 of each segment body 48 is in contact with the opposing contact surface 38. become. The slopes 51 of the adjacent segment bodies 48 are all in contact with each other, and the rubber block 54 is compressed and forcibly accommodated in the corresponding holding groove 52.

As shown in FIG. 2, the central axis 40 in FIG. 1 passes through the position of the center of gravity of the segment 48 that is annularly arranged in the closed state.
When the opposing side end surfaces 16 of the support members 12 and 14 move away from each other, as shown in FIG. 1, each coil spring 56 pushes the central segment 48 away from the contact surface 38, Further, the rubber block 54 pushes out the segment bodies 48 in contact with each other on the inclined surfaces 51 so as to separate them.

As shown in FIG. 2, the tip teeth 53 of the segment 48 are oriented in the direction of the central axis 40 to form a central passage surrounded by the tip teeth 53.
In actual use, as described above, the detonator is moved in the direction of the arrow 24 one after another by the transport mechanism when the support members 12 and 14 are sufficiently spaced apart. When the opposing side end surfaces 16 of the support members 12 and 14 are brought close to each other, the engagement piece 50 whose movement is restricted in the opening groove 42 moves to the opposite end as shown in FIG. Each segment 48 is crushed and protrudes toward the central axis 40 side.

Further, when the supporting members 12 and 14 are close to each other, the rubber block 54 between the spaces S in FIG. 1 contacts and deforms against the inclined surface of the opposing segment 48 and further deforms the other rubber blocks 54 in a chain. Let Then, the segment 48 held by the support member 14 and the segment 48 held by the support member 12 come into contact with each other, and the detonator is gently held coaxially with the central axis 40.
Further, as the central segment 48 approaches the abutment surface 38, the coil spring 56 applies pressure to the bottom surface thereof, and the segment pieces 48 on both sides abut the engagement pieces 50 against the end of the opening groove 42. When the abutting surface 38 is slid until the side end surfaces 16 are brought into close contact with each other, the result is as shown in FIG.

As described above, when the support members 12 and 14 are in the closed state, the pointed teeth 53 of the radially arranged segments 48 protrude toward the central axis 40, and as shown in FIG. A central passage with teeth arranged around it is formed.
They are close to the outer periphery of the casing of the detonator arranged coaxially with the central axis 40, and the pointed teeth arranged in an annular shape bite into the outer peripheral surface of the casing, so that the ignition member (or the cylinder holding the ignition member) Alternatively, crimping is performed in the direction of reducing the cross-section of the insertion port into which the joined body) is inserted.
When the support members 12 and 14 are continuously opened and closed, the segment body 48 is slid along the contact surface 38 while moving the engagement piece 50 engaged with the opening groove 42 from one end surface to the other end surface. The operation of deforming the rubber block 54 sandwiched between the side surfaces and displacing the central segment 48 against the bias of the coil spring 56 is automatically repeated.

A detonator closure 100 according to a second embodiment of the present invention will be described with reference to FIG.
Among the parts constituting the detonator clamp 100, the same or similar parts as those shown in FIGS. 1 and 2 are denoted by common reference numerals.
In the detonator clamp 100, the positioning piece 26 in the support member 12 and the positioning hole 34 in the support member 14 shown in the first embodiment are not shown.
The detonator mouth clamp 100 includes upper surface cover plates 102 and 104 and lower surface cover plates 106 and 108.

The bolt 66 is inserted inward from the outside of the lower surface cover plates 106 and 108, passes through the passage hole 110 of the support members 12 and 14, and is fastened to a sleeve 112 provided inside the upper surface cover plates 102 and 104. ing.
The detonator clamp 100 is provided with a guide piece 114 in each segment 48. These guide pieces 114 engage with guide grooves 116 provided in the lower surface cover plates 106 and 108 to direct the movement of each segment 48. The guide piece 114 and the guide groove 116 ensure accurate and stable movement of the segment 48.

  A feature of the present invention is that a simple reciprocating motion (arrow 22) of the support members 12 and 14 and a detonator motion (arrow 24) conveyed intermittently between the support members 12 and 14 are 2 seconds or By carrying out under a short cycle time such as less than that, the crimping operation of each detonator can be carried out quickly.

The contents described so far are merely examples of the invention, and the present invention is not limited thereto. In the drawing, the detonator is supposed to move in the direction of the arrow 24, but it can also be moved in a direction perpendicular to the arrow 24 and in a direction parallel to the arrow 22.
In this case, the support members 12 and 14 not only reciprocate in the direction of the arrow 22 but also reciprocate in the direction parallel to the arrow 24 with respect to the station that supplies the detonator from the parallel direction of the arrow 24 one after another. included.

  DESCRIPTION OF SYMBOLS 10,100 ... Detonator clamp, 12, 14 ... Support member, 16 ... Side end surface, 18 ... End surface, 20 ... Pressure contact surface, 26 ... Positioning piece, 28 ... Perforation, 30 ... Screw, 32 ... Screw groove, 34 ... Positioning hole, 36 ... Notch, 38 ... Contact surface, 40 ... Center axis, 42 ... Open groove, 44 ... Perforation, 46 ... Sleeve, 48 ... Segment, 49 ... Bottom surface, 50 ... Engagement piece, 51 ... Slope 52 ... Holding groove, 53 ... Tip teeth, 54 ... Rubber block (biasing member), 58 ... Perforation, 66 ... Bolt, 68 ... Washer, 102 ... Upper cover plate, 106 ... Lower cover plate, 110 ... Passing hole, 112 ... Sleeve, 114 ... Guide piece, 116 ... Guide groove.

Claims (20)

In the detonator mouth clamp that clamps the periphery of the insertion opening of the metal housing into which the ignition member is inserted,
A pair of support members that are arranged opposite to each other on both sides of the insertion port and at least one of them moves relative to the other and is pressed against each other to be in a closed state;
Plural adjacently arranged in a state where movement is restricted by engaging with each of one or more opening grooves opened in the support member, and the slopes of adjacent ones in the closed state are in contact with each other. As a segment arranged in a circular pattern as
Pointed teeth that are tapered and formed by both slopes rising from both ends of the bottom surface of the segmented body and that are arranged radially and parallel to the central axis of the annular array, and
A biasing member that applies a force that causes the adjacent ones of the plurality of segments arranged in an annular arrangement to repel each other as the support member is switched from the closed state to the open state; ,
The segment body is displaced so that the pointed teeth project toward the central axis of the annular array, and the periphery of the insertion opening of the metal casing arranged coaxially with the central axis is crimped. Detonator clamp.   The detonator clamp according to claim 1, wherein the same number of the segment bodies are arranged on each of the pair of support members.   The detonator mouth clamp according to claim 1 or 2, wherein the number of the plurality of segments arranged in each of the pair of support members is in a range of 2 to 8.   4. The device according to claim 1, wherein one or more of the plurality of segments arranged in each of the pair of support members are further arranged on both sides of the one arranged in the center. Detonator clamp as described in   The at least one of the plurality of segment bodies arranged on each of the pair of support members is fixed to the support member, and the segment bodies located on both sides of the fixed segment body engage with the opening groove. The detonator mouth clamp according to any one of claims 1 to 4.   The detonator mouth clamp according to any one of claims 1 to 4, wherein the plurality of segment bodies arranged on the pair of support members are engaged with the respective opening grooves.   The detonator according to any one of claims 1 to 6, wherein each of the pair of support members is provided with a contact surface including one or more surfaces with which a bottom surface of the segment body abuts. Clamp.   The detonator mouth clamp according to claim 7, wherein the bottom surfaces of the segments arranged radially are flat, and the abutting surfaces that abut on the bottom surfaces are formed in multiple faces according to the number of the segment bodies.   The detonator mouth clamp according to claim 7 or 8, wherein an engagement piece that engages with the opening groove that opens in the abutting surface is provided on a bottom surface of the segment bodies arranged radially.   The detonator mouth clamp according to any one of claims 1 to 9, wherein the urging member is a rubber block held in a holding groove provided on a side surface of the segment bodies arranged radially.   The rubber block is pressed by the side surface of the adjacent segment body and accommodated in the holding groove as the pair of support members switch from the open state to the closed state. Detonator clamp.   The detonator mouth clamp according to claim 10 or 11, wherein the rubber block has a cylindrical shape, and the holding groove is configured so that a cylindrical axis thereof is parallel to a central axis of the annular array. The support member has a rectangular parallelepiped shape having a pair of main surfaces perpendicular to the central axis of the annular array, takes a long side in a direction orthogonal to the movement direction of the support member, and follows the movement direction. The width is configured to be greater than the thickness,
The surface surrounded by the long side and the thickness of the support member forms a pressure contact surface between the pair of support members in a closed state,
The detonator mouth clamp according to any one of claims 1 to 12, wherein a surface surrounded by the width and the thickness of the support member is an end surface of the pair of support members in a closed state.   The contact surface provided with the opening groove to be engaged with the engagement piece of the segment body is formed in a polygonal shape from the main surface side by cutting out the pressure contact surface side of the support member. The detonator clamp according to claim 13.   The detonator mouth clamp according to claim 14, wherein the contact surface formed in multiple faces is configured in parallel with a central axis of the annular array.   The cover plate according to any one of claims 13 to 15, further comprising a cover plate that covers main surfaces on both sides of the support member, holds the segment body or the urging member inside the main surface, and restrains movement in the central axis direction. Detonator clamp as described in the paragraph.   The detonator mouth clamp according to claim 16, wherein the cover plate has a guide groove for guiding a guide piece provided in the segment body, and the segment body is guided by the guide groove and the guide piece.   One of the pair of support members is provided with a positioning piece, and the other support member is provided with a positioning hole for locking the positioning piece. In the closed state, the positioning piece is the positioning hole. The detonator mouth clamp according to any one of claims 13 to 17, wherein the positioning piece is removed from the positioning hole in the open state. In the detonator capping method of caulking the periphery of the insertion port of the metal housing into which the ignition member is inserted,
A step of intermittently transporting a plurality of detonators from one pair to the next between a pair of opposing support members;
When the pair of support members come close to each other and come into pressure contact with each other to be in a closed state, a plurality of segments arranged in an annular manner move with pointed teeth toward the detonator housing arranged coaxially with the central axis;
The tip teeth of the segment body projecting toward the central axis abut on the outer periphery of the metal housing, and caulking together with the ignition member;
Moving the pair of support members in opposite directions to open states;
And a step of removing the crimped detonator and placing a new detonator between the support members.   20. The detonator closure method according to claim 19, further comprising a step of urging the plurality of segments arranged in an annular arrangement in a direction in which they are separated from each other when shifting from the closed state to the open state.

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