JP2008284974A - Anchor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anchor of a simple mechanism which is applicable to both for a small ship where the storage place thereof is limited, and for a medium to large ship, and capable of changing the position of traction even by a relatively small force. <P>SOLUTION: The anchor for anchoring a ship by locking an anchor arm projected on an end side of an anchor shank comprises an anchor bottom part fixed to a base part of the anchor arm, a hollow member having an engagement part with an anchor chain or an anchor cable and slidably housed over the anchor shank, a chain longer than the anchor shank to connect the hollow member to the anchor bottom part, and an elastic member for urging the hollow member housed over the anchor shank in the direction of the anchor bottom part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a anchor that anchors a ship, and more particularly, to an anchor that can change a tow position when the ship is pulled up from the water.

When fishing boats, leisure boats, fishing boats or other ships are anchored, it is common to lock the kites by sinking them into the seabed and by their weight or by biting their arms into reefs or sand.
However, in a ship with a small ship area, the ridges are bulky and may become an obstacle for the crew, leading to injuries and accidents.
In view of this, there has been proposed a kite that can be easily carried by configuring the leopard pattern, the arm and the stock so that they can be disassembled, assembled and used when throwing, and disassembled and stored on board (see Patent Document 1). Also, since it is inconvenient to assemble at the time of use, the coil spring is used, the stock is configured to be rotatable with respect to the leopard pattern, the stock and the forearm are thrown at right angles, and the stock and the forearm are parallel to the ship. A storage bag has been proposed (see Patent Document 2).
On the other hand, if the arm of the coral gets caught in a gap in the reef, it becomes difficult to remove it, and there are cases where it is necessary to cut the anchor chain and the rope and discard the coral.
Therefore, the head of the hook and the base of the hook are connected with a hook or a leash, and the connection with the head of the hook is interposed with a coupler that is cut when the hook or the hook is pulled with a constant force. Thus, when the arm is biting into a reef, a method of cutting the coupling and changing the towed portion of the coral to the base of the coral (see Patent Document 3), a coral with a movable arm is proposed. (See Patent Document 4).
Japanese Utility Model Publication No. 7-8191 JP 2001-278182 A Japanese Patent No. 2617166 Japanese Patent Laid-Open No. 9-240576

However, the method of making the stock or the arm movable is likely to cause the movable part to break down or break. In addition, the method using a disposable coupler requires a large number of couplers for fishing boats and fishing boats that frequently move and anchor in rocky areas. Further, in a small vessel, it is preferable that the traction position is changed with a relatively small force, but it is not easy to control the limit value tension of the breakable portion in a small tension range.
In view of the above circumstances, the present invention is applicable to a small vessel having a limited storage location, or a medium or large vessel, and is a simple mechanism that can change the towing position with a relatively small force. The purpose is to provide.

A spear of the present invention that achieves the above object is a spear that anchors a spear arm that protrudes on the end side of a spear handle having a predetermined length, and anchors the ship, at the base of the spear arm A hollow member having an anchored portion of the anchor bottom and an anchor chain or a leash and slidably fitted to the rod handle, and the rod connecting the hollow member and the anchor bottom A chain that is longer than the handle and an elastic member that urges the hollow member externally fitted to the handle toward the bottom of the hook are provided.
When the ship is anchored using the anchor, the hollow member is externally fitted to the anchor handle, and is submerged in water in a state where the anchor chain or the rope is engaged with the engaging portion.
In this way, even when the spear that has reached the bottom of the water is pulled by a spear chain or a reed rope with a normal force, the hollow member is urged by the elastic member, so that the tubular member engaged with the reed chain or the reed line is The elastic member is urged by being fitted to the leopard handle, and is locked to the bottom of the water in the same state that the leopard handle is pulled.
Further, when the hollow member is detached from the hook handle, the hook bottom connected to the hollow member by the chain is pulled by the hook chain or the rope and pulled up from the water.
When a reed is caught on a reef, the hollow member can be detached from the reed handle by pulling the reed chain or reed line with a large force exceeding the normal force, so the tow position is from the top of the reed to the bottom of the reed It can be easily lifted out of the water.
Here, as a kind of scissors, the scissors are equiangular with each other, and at least three plate-like bodies are projected at an acute angle with respect to the central axis of the scissors pattern, The rod-shaped body may be fixed coaxially with the leopard handle, or the upper arm is formed by projecting two plate-like bodies having claws at the tip in parallel with the leash pattern in between. The bottom portion may be pivotally attached to the heel handle, or the heel arm may be formed by projecting two plate-like bodies on the end side in opposite directions, It is also a preferable aspect that a stock is provided that is orthogonally projected from the end side.
Further, the chain is composed of a plurality of chain rings, one end of the elastic member is coupled to the hollow member or one chain ring of the chain, and the other end is coupled to the chain by a predetermined coupler. It is preferable to be detachably coupled to another chain ring.
If the elastic member is configured in such a manner, the hollow member that is externally fitted to the collar will be separated from the collar depending on the position of the chain ring to which the other end of the elastic member is coupled. Since the urging force urged by the elastic member changes, it is possible to adjust the urging force when the urging force is locked to the water bottom in accordance with the weight of the heel or the structure of the heel arm.
The elastic member is preferably composed of at least one coil spring.
Thus, the biasing force of the elastic member can be controlled according to the size and weight of the ridge by using a single coil spring or a plurality of coil springs juxtaposed.

  According to the kite of the present invention, even when the bite into the reef or the like cannot be removed, the kite chain or the leash is pulled more strongly than usual to disengage the tubular body externally fitted to the kite pattern, and the kite is pulled. Since it can be changed to the bottom protrusion, the biting arm can be easily removed from the reef. In addition, by adjusting the urging force of the elastic member, it is possible to flexibly cope with the weight of the kite, the size of the ship, stormy weather, etc., and it can be used repeatedly without abandoning the article.

Hereinafter, embodiments of the bag of the present invention will be described.
[First Embodiment]
FIG. 1 is a diagram illustrating, as an example, the configuration of a bag according to the first embodiment of the present invention.
As shown in FIG. 1, the heel 1 of the first embodiment includes a heel handle 10, a bottom protrusion 11, a heel arm 12, a tubular body (corresponding to a hollow member of the present invention) 13, and A chain 14, a single coil spring (corresponding to the elastic member of the present invention) 15, and a shackle (corresponding to a coupler of the present invention) that detachably hooks the end of the coil spring 15 to the chain 14. 16).
The heel handle 10 is formed of a long stainless steel cylinder, the bottom protrusion 11 is formed of a stainless steel rod-shaped body, and the heel arm 12 is formed of four stainless steel strips.
The four strip-shaped plates are welded to one end side 10a at an equal angle with each other, inclined at an acute angle θ with respect to the central axis Y of the handle 10. The base portion 12a of the welded arm is further welded with a bottom protrusion 11 made of a rod-like body that is shorter than the collar pattern 10 so as to have a common axis with the central axis Y of the collar pattern. ing.
In addition, a stainless steel ring 11 a for joining the chain end chain ring is welded to the tip of the bottom protrusion 11.
The cylindrical body 13 is a stainless-steel hollow cylinder, and on its side surface, a ring-shaped engaging portion 18 for coupling a chain or a rope, a chain end chain ring, and one end of a coil spring 15 are locked. And a locking portion 19 to be engaged. And since the hollow internal diameter of the cylindrical body 13 is larger than the outer diameter of the collar pattern 10, the cylindrical body 13 is externally fitted from the other end 10b of the collar pattern 10, and the cylindrical body is fitted externally. Can be freely slid in a leash pattern.
The chain 14 is formed by a plurality of chain rings made of stainless steel. The length of the chain 14 is longer than the leopard pattern 10. One end chain ring 14 a of the chain 14 is locked to the locking portion 19 of the cylindrical body 13, and the other end chain ring 14 b is coupled to the ring 11 a provided at the tip of the bottom protrusion 11. The Therefore, the cylindrical body 13 and the bottom protrusion 11 are connected via a chain.
The coil spring 15 is a tension coil spring formed using a spring stainless steel wire, and has a predetermined free length and a spring constant. Rings 15a and 15b are formed at both ends of the coil spring, respectively. One ring 15a is locked to the locking portion 19 of the cylindrical body, and the other ring 15b is detachably coupled to one chain ring of the chain 14 using a stainless steel shackle 16. .
Therefore, when the cylindrical body 13 is externally fitted to the collar 10 and the coil spring 15 is coupled to the predetermined chain ring 14x by the shackle 16, it is biased by the coil spring 15 when the cylindrical body 13 is detached from the collar. The urging force (hereinafter referred to as “separation urging force”) varies depending on the position of the chain ring 14x connected.
Here, the other ring 15b of the coil spring 15 is thrown into the water while being connected to the predetermined ring 14x of the chain 14 using the shackle 16. However, when storing on board, the shackle 16 is removed and the free ring 15b is freely moved. You may make it a state, and you may make it the state still couple | bonded with the predetermined chain ring 14x.
FIG. 2 is a diagram showing the dredged state in which the ship is anchored underwater.
As shown in FIG. 2, the scissors 1 of the present embodiment are configured such that the tubular body 13 is externally fitted to the scissors handle 10 and the scissors 18 b is engaged with the scissors chain 18 a engaged with the engaging portion 18 of the tubular body 13. Is pulled down in the water, and the hook arm 18b is pulled in the direction of arrow A, whereby the hook arm 12 can be locked to the bottom of the water.
In that case, the chain ring position where the other ring 15b of the coil spring 15 is coupled by the shackle 16 is selected so that the detachment biasing force exceeds the force necessary for the arm 12 to bite into the sand of the bottom of the water.
When the other ring 15b is coupled to the chain ring near the bottom protrusion 11, the detachment biasing force is increased, and when the other ring 15b is coupled to the chain ring near the cylindrical portion 13, the detachment biasing force is decreased.

FIG. 3 and FIG. 4 are diagrams showing a process of changing the pulling position and pulling it up when it cannot be pulled up with a normal pulling force.
In FIG. 3, when pulling up the kite, the kit is generally pulled up in the direction of arrow B almost vertically based on a buoy that informs the position of the kite. However, when the arm 12 is caught on a reef or the like, it is difficult to pull up the rod 1 even if the rod 18b is pulled by a normal traction force. In such a case, the tubular body 13 is separated from the handle 10 by being pulled with a force larger than the detachment biasing force.
In that case, the length Lc of the chain 14 that connects the tubular body 13 and the bottomed portion 11 is slightly longer than the length Lt obtained by adding the length Lp of the bottom protrusion 11 to the length Ls of the collar 10. It is set. (Lc> Ls + Lp) Accordingly, the tubular body 13 can be detached from the collar 10 by pulling with a force exceeding the separation biasing force. However, in this case, the urging force of the detachment is equal to or less than the allowable load of the coil spring 15 and the cylindrical body 13 when the initial tension is applied to the coil spring 15 is fitted into the handle 10 by one third or more in the longitudinal direction. Therefore, the length of the chain 14 and the position of the chain ring 14x to which the coil spring 15 is coupled are selected. Furthermore, the allowable load of the coil spring 15 is the traction force (hereinafter referred to as “extension limit traction force”) when the rope spring 18b is pulled to a limit where the coil spring 15 cannot extend any more, limited by the length of the coupled chain. If the position of the chain ring 14x to which the coil spring 15 is coupled is selected so as to become the following, even if it is necessary to pull with a greater force, the force exceeding it is shared by the chain, The coil spring 15 can be used repeatedly within the allowable load.
In FIG. 4, after the tubular body 13 is detached from the handle 10, the traction position is changed from the handle 10 to the bottom protrusion 11, and the bottom bump joined to the tubular body 13 by the chain 14 and the coil spring 15. Pulled up with part 11 at the top.
As shown in FIG. 3 and FIG. 4, the arm that is hooked on the reef is disengaged when the traction position is changed to the bottom protrusion 11, and after the release, the force is about the weight of the anchor. Can be easily pulled up from the water.
Although the stainless steel member is used for the handle 10, the bottom protrusion 11, and the arm 12 of the present embodiment, it is not always necessary to be a stainless member, and a member such as iron is plated or painted. Also good. Moreover, although the columnar member 10 uses the column member, it does not necessarily need to be a column and may be a prism or an elliptical column. Further, it may be formed in a hollow shape, and the specific gravity thereof may be increased by filling the hollow portion with lead or the like, or a weight may be attached near the end side of the columnar member to increase the weight of the entire basket.
Moreover, the hollow member does not necessarily need to be a cylinder, and a hollow member having a shape corresponding to the cross-sectional shape of the handle 10 can be used. Furthermore, the arm 12 is formed by welding four strip-shaped ones to the leopard pattern, but may be three, and does not necessarily need to be a strip-shaped, Also good. Furthermore, the heel handle 10, the bottom protrusion 11 and the heel arm 12 are integrated by welding, but the whole may be integrally formed, or the heel handle 10 and the bottom protrusion 11 are formed of a common columnar member. Then, the columnar member may be integrated by passing through a rectangular member bent at an obtuse angle and having a hole in the center thereof and welding to the inner end side of the tip end. In the present embodiment, a single coil spring is used as the elastic member, but a plurality of coil springs may be used. Furthermore, the elastic member is not necessarily a coil spring, and rubber may be used.
The kite 1 of the present embodiment is mainly applied to small ships, but it is possible to adjust the size of the kite handle 10, the bottom projection 11, the brace arm 12, and the cylindrical body 13, and the coil as an elastic member. By arranging a plurality of springs 15 in parallel, it can also be used for a main ship and a side ship of a large ship.

[Second Embodiment]
The second embodiment is different from the first embodiment in the structure of the main part of the heel, but the other points are the same.
FIG. 5 is a diagram illustrating, as an example, the configuration of the bag according to the second embodiment of the present invention.
As shown in FIG. 5, the scissors 2 of the second embodiment include a scissors handle 20, a bottom protrusion 21, a scissors arm 22, a tubular body (corresponding to a hollow member of the present invention) 13, and The chain 14, a single coil spring 15, and a shackle 16 that removably couples the end of the coil spring 15 to the chain 14 are configured.
The cocoon handle 20, which is the main part of the heel 2 of the present embodiment, is formed of a stainless steel long prism, and the heel arm 22 is made up of two stainless steel plate-like bodies having a claw 22 a at the tip. A bottom protrusion 21 made of an H-shaped member is fixedly provided at the base of each of the two plate-like bodies. Further, the collar pattern 20 is pivotally attached to the bottom protrusion 21 using a pin 25. Accordingly, the heel handle 20 rotates freely in the direction of arrow C within a predetermined angle range with respect to the heel arm 22.
The cylindrical body 13 is a stainless-steel hollow cylinder, and on its side surface, a ring-shaped engaging portion 18 for coupling a chain or a rope, a chain end chain ring, and one end of a coil spring 15 are locked. And a locking portion 19 to be engaged. And since the hollow part of the cylindrical body 13 is larger than the cross section of the collar pattern 20, the cylindrical body 13 can be slidably fitted out from the other end 20b of the collar pattern 20.
The chain 14 is formed by a plurality of chain rings made of stainless steel, and is longer than the collar 20, and one end chain ring 14 a is locked to the locking portion 19 of the cylindrical body 13, and the other end The chain ring 14 b is coupled to the bottom protrusion 21. As a result, the cylindrical body 13 and the bottom protrusion 21 are connected via the chain 14.
The coil spring 15 is a tension coil spring formed using a spring stainless steel wire, and has a predetermined free length and a spring constant. One end of the coil spring is locked to the locking portion 19 of the cylindrical body 13. The other end is detachably coupled to one chain ring of the chain 14 using a shackle.

[Third Embodiment]
The third embodiment is different from the first and second embodiments in the structure of the ridge main part and the point that both ends of the coil spring are coupled to the chain, but the other points are the same. .
FIG. 6 is a diagram showing an example of the configuration of the bag according to the third embodiment of the present invention.
As shown in FIG. 6, the scissors 3 of the third embodiment include a scissor handle 30, a bottom protrusion 31, a collar arm 32, a stock 33, a tubular body 13, a chain 14, and a single line. And a coil spring 15.
The heel handle 30 which is the main part of the heel 3 of the present embodiment is formed of a long stainless steel cylinder, and the heel arm 32 is a rod-shaped body made of two stainless steel plates each having a claw 32a at the tip. The stock 33 protrudes in the opposite direction from the end side of the collar pattern 30 to both sides so as to be orthogonal to the collar arm 32.
The cylindrical body 13 is a hollow hollow cylinder made of stainless steel, and has a ring-shaped engagement portion 18 for connecting a chain or a leash on a side surface. The engagement portion 18 includes a terminal chain of a chain 14. Rings are attached.
The coil spring 15 is a tension coil spring formed using a spring stainless steel wire, and has a predetermined free length and a spring constant. One end of the coil spring is coupled to the chain 14, and the other end is detachably coupled to any chain ring of the chain 14 using a shackle.
Here, the example of the bag of this embodiment is shown.

The leopard pattern is a SUS columnar body having an outer diameter of 23 mm and a length of 300 mm.
The brace arms are welded to the side ends of four SUS plate-like bodies having a thickness of 5 mm, a width of 40 mm, and a length of 180 mm that are orthogonal to each other and have an angle of 60 degrees with respect to the brim pattern.
The bottom protrusion is a SUS columnar body having an outer diameter of 17 mm and a length of 100 mm, and is welded coaxially to the base of the arm and the tip of the handle so that the central axis of the handle corresponds to the axis.
The cylindrical body is a SUS cylindrical body having an inner diameter of 27 mm, an outer diameter of 33 mm, and a length of 90 mm. A semicircular ring is welded to two side surfaces.
As the chain, a SUS wire rod having an outer diameter of 8 mm is bent and 15 long chain rings each having L of 48 mm and B of 28 mm are connected.
The coil spring is a tension coil spring having an outer diameter of 16 mm, a wire diameter of 1.8 mm, a free length of 141.6 mm, an allowable load of 65.66 N (6.7 kgf), an initial tension of 18.424 N, and a spring constant of 0.4998 N / mm. , One end is engaged at a position 10 mm from the end of the cylindrical body, and the other end is coupled to the N-th chain ring from the bottom protrusion side of the chain.
The weight of the basket is 2.5 kg.
Part 1: The separation limit biasing force when the other end of the coil spring is coupled to the fifth chain ring from the bottom protrusion side of the chain is 67.6 N (6.9 kgf), and the allowable load of the coil spring is To exceed.
Part 2: The separation limit biasing force when the other end of the coil spring is joined to the sixth chain ring from the bottom protrusion side of the chain is 52.6 N (5.4 kgf), which is within the allowable load of the coil spring. It is. The elongation of the coil spring at that time is 68.4 mm. The extension limit traction force is 82.6 N (8.4 kgf), which exceeds the allowable load of the coil spring.
Part 3; The separation limit biasing force when the other end of the coil spring is coupled to the seventh chain ring from the bottom protrusion side of the chain is 37.6 N (3.83 kgf), which is within the allowable load of the coil spring. It is. The elongation of the coil spring at that time is 38.4 mm. The extension limit traction force is 67.6 N (6.9 kgf), which slightly exceeds the allowable load of the coil spring.
4 The separation limit biasing force when the other end of the coil spring is coupled to the eighth chain ring from the bottom protrusion side of the chain is 22.6 N (2.3 kgf), which is within the allowable load of the coil spring. In the initial tension state, the cylindrical body is almost detached.
Therefore, in this configuration, the proper latching position of the coil spring is the seventh from the bottom protrusion side.

The leopard pattern is a SUS columnar body having an outer diameter of 23 mm and a length of 300 mm.
The bottom protrusion is a SUS columnar body having an outer diameter of 15 mm and a length of 70 mm, and is welded coaxially to one end of the collar so that the axis coincides with the central axis of the collar.
The arm is a SUS plate-like body having a thickness of 5 mm, a width of 40 mm, and a length of 180 mm. The four plate-like bodies are orthogonal to each other, the hook pattern has an angle of 60 degrees, and is welded to the side ends. .
The cylindrical body is a SUS cylindrical body having an inner diameter of 27 mm, an outer diameter of 33 mm, and a length of 90 mm. A semicircular ring is welded to two side surfaces.
As the chain, a SUS wire rod having an outer diameter of 8 mm is bent and 15 long chain rings each having L of 48 mm and B of 28 mm are connected.
The coil spring is a tension coil spring having an outer diameter of 16 mm, a wire diameter of 2.00 mm, a free length of 153.4 mm, an allowable load of 90.360 N (9.214 kgf), an initial tension of 27.93 N, and a spring constant of 0.7938 N / mm. , One end is engaged at a position 10 mm from the end of the cylindrical body, and the other end is coupled to the N-th chain ring from the bottom protrusion side of the chain.
The weight of the basket is 3.0 kg.
Part 1: The separation limit biasing force when the other end of the coil spring is connected to the fifth chain ring from the bottom protrusion side of the chain is 68.8 N (7.0 kgf), which is within the allowable load of the coil spring. It is. The elongation of the coil spring at that time is 86.6 mm. The extension limit traction force is 144.3 N (14.7 kgf), which exceeds the allowable load of the coil spring.
Part 2: The separation limit urging force when the other end of the coil spring is joined to the sixth chain ring from the bottom protrusion side of the chain is 45 N (4.6 kgf), which is within the allowable load of the coil spring. . The elongation of the coil spring at that time is 56.6 mm. The extension limit traction force is 120.5 N (12.3 kgf), which exceeds the allowable load of the coil spring.
Part 3; The separation limit biasing force when the other end of the coil spring is joined to the seventh chain ring from the bottom protrusion side of the chain is 21.2 N (2.2 kgf), within the allowable load of the coil spring It is. The elongation of the coil spring at that time is 26.6 mm. The extension limit traction force is 96.7 N (9.9 kgf), which slightly exceeds the allowable load of the coil spring.
Therefore, in this configuration, the proper latching position of the coil spring is the seventh from the bottom protrusion side.

  It can be used as a main ship or a secondary ship from a small ship to a large ship.

It is a figure which shows the structure of the bag of the 1st Embodiment of this invention as an example. It is a figure which shows the kite of the state taken down in water in order to anchor a ship. It is a figure which shows the process in which it pulls up by changing a pulling position when it cannot pull up with normal tractive force. It is a figure which shows the state which changes and pulls up a pulling location when it cannot pull up with normal tractive force. It is a figure which shows the structure of the bag of the 2nd Embodiment of this invention as an example. It is a figure which shows the structure of the bag of the 3rd Embodiment of this invention as an example.

Explanation of symbols

1, 2, 3 錨 10, 20, 30 錨 handle 10a One end side
10b The other end 11, 21, 31 Bottom projection 11a, 15a, 15b Ring
12, 22, 32 Arms 12a Base 13 Tubular body 14 Chain 14a, 14b Terminal chain ring
14x Chain ring to which coil spring is coupled 15 Coil spring 16 Shackle 18 Engagement portion 18a Chain 18b Cord 19 Locking portion 22a Claw 25 Pin 33 Stock

Claims (9)

A anchor that anchors a forearm projecting on the end side of a anchor pattern having a predetermined length and anchors the ship,
A heel base fixed to the base of the heel arm;
A hollow member that has an engagement portion with a chain or a leash, and is slidably fitted to the leash;
Linking the hollow member and the heel bottom, a chain longer than the heel handle,
An eaves comprising: an elastic member that urges the hollow member fitted on the eaves handle toward the eaves bottom portion.   2. The bag according to claim 1, wherein the hollow member is externally fitted to the hook handle and is submerged in water in a state where a hook chain or a rope is engaged with the engaging portion. The arm is equiangular with at least three plate-like bodies projecting at an acute angle with respect to the central axis of the hook pattern. 2. The bag according to claim 1, wherein the bag is fixed on the same axis. The hook arm is formed by projecting two plate-like bodies having hook claws at the tip thereof in parallel with the hook pattern interposed therebetween, and the bottom portion is pivotally attached to the hook pattern. The bag according to claim 1, wherein the bag is characterized. The lower arm is formed by projecting two plate-like bodies in the opposite direction on the end side,
The scissors according to claim 1, further comprising a stock projecting on the end side so as to be orthogonal to the arm. The chain is composed of a plurality of chain rings,
One end of the elastic member is coupled to the hollow member or one chain ring of the chain, and the other end is detachably coupled to the other chain ring of the chain by a predetermined coupling tool. The bag according to claim 1.   The scissors according to claim 1, wherein the elastic member comprises at least one coil spring. The said bottom part connected with this hollow member by the said chain | strand is pulled by the said anchor chain or the rope, and is pulled up from water when the said hollow member remove | deviates from the said handle.錨. Depending on the position of the chain ring to which the other end of the elastic member is coupled, the hollow member that is externally fitted to the collar has a biasing force that is biased from the elastic member when the collar is detached from the collar. The bag according to claim 6, characterized in that it changes.