JPS631239B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mast base structure of a sailboard having a universal joint for connecting the mast to the sailboard, and the present invention relates to a mast base structure of a sailboard having a universal joint for connecting the mast to the sailboard, and the present invention relates to a mast base structure for a sailboard having a universal joint for connecting the mast to the sailboard. An adjustable spring member is provided to prevent injury caused by trapping the board sailor's limbs between the upper surface and the upper surface.

[Conventional technology]

As disclosed in German Patent Application No. 2747057, the mast base device has been proposed in a prior invention of the applicant. This known mast base is a safety connection using an adjustable spring member, with the purpose of preventing injuries caused by the sailor's feet being caught between the mast and the upper surface of the deck of the board. It is created as. It is arranged that upon release of the spring element, which acts as a kind of safety connection, the entire mast base with the mast and the sail rigging are taken out of the hole provided in the body of the sailboard. Therefore, the entire rigging had to be connected to the body of the board by special strings.

[Problem that the invention seeks to solve]

The conventional safety mast base concept described above is adjustable by the board sailor, similar to how ski bindings are adjusted by the skier.
In view of the fact that it is possible to completely prevent the risk of injury to limbs caused by being caught between the mast and deck top,
Although it certainly has the desired effect on injury prevention, it also has the following drawbacks. That is,
If the force acting against the adjustment of the spring member is too small, the rigging may be undesirably pulled out of the body of the board. For example, this tendency is particularly strong when pulling sails out of the waves, such as when surfing through broken liquid near a beach or under strong winds, or when sailing in rough waves.

Once the rigging is pulled out of the fuselage, the fuselage can no longer be steered and the sailor may be thrown off the board. This is especially undesirable in competitions.

One object of the invention is therefore, on the one hand, to further develop the basic idea of a safety connection and, on the other hand, to provide a type of safety and operation based on a design that does not require separation from the body of the sailboard. The goal is to develop a mast base with excellent performance.

[Means and actions to solve the problem]

The key device of the present invention to achieve the above objective is the “internal elasticity” so that it no longer separates from the sailboard, in order to prevent injuries.
The purpose of the present invention is to design a mast base having the following shape, and the mast base can be easily folded at any desired height.

That is, the mast base of the sailboard of the present invention basically has an adjustable spring part to prevent injury to the sailboard user, and a universal joint for connecting the mast to the body of the board. a mast base of a sailboard, the mast base comprising: a mast support device fixed to an upper surface of the body of the sailboard for supporting the mast; and a mast support device provided between the lower end of the mast and the mast support device. The mast support device has an upper end coupled to the universal joint, and extends downward through the center of the mast support device so as to form a part of the mast support device, and has a large diameter head at the lower end. a central portion of the mast support device together with the universal joint includes a central pin movable upwardly substantially perpendicular to the body of the sailboard; and a central pin and the support arranged to provide resistance to movement of the central pin; The device is characterized by comprising a spring disposed between the device and the device.

That is, the basic structure of the mast base of the sailboard of the present invention is such that the mast is bendable at the universal joint, and the mast base, together with the universal joint, resists the spring force of the spring and bends the sailboard body. It is designed so that it can be moved upward approximately perpendicular to the upper surface of the deck.

One advantage provided by the present invention is that a completely novel device is used to provide a safety feature, so that the connection between the mast base and the fuselage is fixed or normally is created in such a way that it can never be lifted. On the other hand, the sailor is nevertheless kept safe from injury. This is because the mast base retracts elastically at a substantially right angle to the sailboard deck. This makes it possible to obtain various aspects of the invention in a manner that is quite different from the prior art widely used in mast base design. That is,
In addition to being completely safe in terms of injury prevention, the mast base support device is integrally molded with the plastic of the sailboard body or screwed into the body. One preferred embodiment of the invention provides that the mast base made along the lines described above is slid into a hole formed vertically in the body of the sailboard, as is usually the case, and It is in a format that can be extracted from. Although this male connection may be different, as long as it is part of this invention the mast base is locked as tightly as possible to the fuselage.

A very light and at the same time simple form of connection between the lower part of the mast base and the sailboard is
A universal joint is provided by being fixed to a central pin of a support device that is connected to the sailboard. With respect to the stationary support device, this central pin together with the universal joint can then be moved upwards approximately perpendicular to the upper surface of the sailboard deck against a spring adjustable in terms of spring force. The support device is arranged in a sleeve which is fixed to the board body by means of gluing or casting, and the support device is secured to the sleeve by a locking device. This locking device is a rotary lock with a bayonet connection.

In one preferred embodiment of the invention, the bayonet connection is provided in the lower part of the mast base which is seated within the sleeve such that locking is effected within the sleeve by rotating the lower part of the mast base. is formed on the surface of the guide sleeve for guiding the central pin with an annular protruding lip having two opposing flat portions, and two protrusions corresponding to the flat portion and sized such that the flat portion passes through. The sleeve is constructed by forming a piece on the inner surface of the sleeve. It is clear that in this embodiment it is possible to perform the locking without any other moving parts and the weight is considerably less than that of the locking device described in the West German patent specification mentioned above. Probably.
This embodiment, which is part of the main idea of the invention, is possible only because of the internal elasticity and prevents any chance of injury due to entrapment of limbs, and in addition the mast with such elasticity The base is permanently affixable to the windsurfing board body.

In a further particularly preferred embodiment of the invention, the lug can be retracted in a spring-loaded manner, the spring force being adjustable. This embodiment provides an additional safety feature with respect to injury prevention, even though the mast base is generally strongly secured to the sleeve. When a movement is applied which exceeds the maximum possible movement for the central pin, the mast base can still be pulled without any hindrance so that no serious injury occurs.

In connection with this aspect of the invention, the protruding piece may be formed by the foot of a generally U-shaped spring member. The legs extend partially into holes in the sleeve beyond the annular projecting lip. This promotes a particularly strong structure as part of the present invention.

Although it is possible to adjust the locking force generated by the two legs by simply bending the spring member outward or inward, the spring force acting on the lower part of the mast base It is also possible to configure this spring element to be moved in two groove-like guides of the sleeve, as determined by the position.

A further preferred embodiment of the invention further comprises a second locking device which is releasable and further retains the end position at the bottom of the mast base. This locking device prevents twisting of the lower part of the mast base relative to the sleeve.

As part of an advantageous further development of this aspect of the invention, said second locking device takes the form of a pin actuated into the lower part of the mast base by a downwardly directed spring force. This pin fits into a hole in the sleeve when the locking device is placed in the locked condition.

Furthermore, it is possible to have a hand handle so that the pin of said second locking device can be lifted to unlock said locking device.

〔Example〕

The present invention will be described in more detail below with reference to the accompanying drawings.

In the embodiment of the invention shown in FIGS. 1 to 3, the mast base, designated 1, is attached to the sailboard by means of a male coupling which can be locked in the telescoping condition, as shown below. It is coupled to the fuselage 2. This mast base has a mast support device 3 at its proximal end and a universal joint 4 in the form of a rubber block, whose trade name is "Silent Block" and which is fluidized at both ends and has plates and bolts 24 and 25. It is composed of. Furthermore, a pipe fitting 5 is inserted into the lower end of the mast 6.

As can be clearly seen from the cross section in Figure 2,
In an embodiment of the invention, said support device 3 comprises three concentric parts: a central pin 7, a guide sleeve 8 and a rubber liner 9.

Although the entire support device 3 should be made integrally with the sailboard body 2, in embodiments of the invention the gripping or locking device 10 is integrated with the support device 3.
is used to lock onto the fuselage 2. By using this gripping device 10, the mast base 1
is locked in a sleeve 11 having a locking collar 11a fixed in the foam of the sailboard body 2. For this purpose, the guide sleeve 8 has a large-diameter head 12 at its lower end, and the rubber liner 9 is placed on the step 17 of the large-diameter head 12. The guide sleeve 8 can be moved axially with respect to the adjustment sleeve 14 by means of an external thread 13 which threads into an internal thread in the adjustment sleeve 14. This adjusting sleeve 14 is connected to a manual knob 15, for example by a screw 16, so that it can be turned by hand in order to compress the rubber liner 9 and push the guide sleeve 8 into the sleeve 11 (thereby locking it). . In order to also ensure that the entire support device 3 cannot be rotated, also for this locking operation, the guide sleeve is arranged in such a way that the two back-to-back projections 18 fit into the axial grooves 19 of the sleeve 11. 8 large-diameter head 12.

If, after inserting the mast base 1 into the sleeve 11, the mast base is to be locked there, the guide sleeve 8 and the adjustment sleeve 1
4 through the screw 13, the manual knob 15 has the guide sleeve 8 connected to the adjustment sleeve 1.
It will be understood from the foregoing description that it is rotated to move upwardly with respect to 4. This is because the rubber liner 9 is deformed so as to bulge outward and is strongly pressed against the inner peripheral surface of the sleeve 11. Therefore, by turning the manual knob 15, a connection between the mast base 1 and the fuselage 2 that will not become incomplete even under extremely rough surfing conditions is made possible.

As is clear from FIG. 1, the central pin 7 has at its lower end a radially enlarged head 20 and a large diameter head 1 of the guide sleeve 8.
A spiral spring 21 is placed between the spring 2 and the spring 2, and a washer 22 is provided on the top of the spring 21.

The central pin 7 is inserted into the guide sleeve 8 with a clearance so that it can be moved up and down in the axial direction within the guide sleeve 8 against the elastic force of the spring 21.

A universal joint 4 is fixed to the top of the central pin 7 by a threaded bolt 24, and a washer 23 is interposed between the universal joint 4 and the manual knob 15. In this embodiment of the invention, said universal joint 4 has threaded bolts 24 and 25 at each end thereof.
Since the pipe joint 5 has a silent block shape, the pipe joint 5 supporting the mast 6 is also connected to the universal joint 4 through a threaded connection (threaded engagement). Furthermore, in an embodiment of the invention, the rotation of the universal joint 4 about the upright axis takes place with the central pin 7 also being rotated, and is therefore stopped or damped by the spring force of the spring 21. Therefore, it is best for the relationship between the universal joint 4 and the pipe fitting 5 that the pipe fitting 5 can be freely rotated relative to the universal joint 4 about the upright axis.

The operation of embodiments of the invention for preventing injuries, particularly those caused by getting a limb caught between the mast 6 and the upper surface of the deck of the fuselage 2, is as follows:
This can be well understood from Figure 3.

In FIG. 3, part of the limb is shown schematically in section 26' between the mast 6 and the fuselage 2;
In this case, the central pin 7, which is guided in a sufficiently straight line by the guide sleeve 8, is pulled upwards against the force of the spring 21 so that the limb 26' is not pinched or injured. When the mast 6 is brought upright again, the central pin 7 is pulled back downwardly by the spring 21 so that the universal joint 4 automatically returns to the position in which it seats on the top of the support device 3 when sailing.

The force required to obtain an axial upward movement of the central pin 7 to prevent any chance of injury is determined by the use of a spring 21 with a spring force tailored to the particular test and wishes of the board sailor. Alternatively, another adjustable connection in the same manner as between the adjusting sleeve 14 and the guide sleeve 8 may be provided for a stepless adjustment of the force of the spring 21.

The same reference numerals are used for similar parts in the second embodiment shown in FIGS. 4 to 8.

The mast base of the invention, designated 1, is in the case of this embodiment connected to the sailboard body 2 by a male connection which can be locked in place, as will become clear later on. Ru.
The mast base 1 has a support device 3 constituting the lower part of the mast base at its base end, a silent block-shaped universal joint 4, and a male member placed above the universal joint and inserted into the lower end of the mast 6. A pipe joint 5 having a section is provided. The mast 6 is held in place on the fitting 5 by a sail (not shown). For this purpose, the sail has a luff towline that is threaded through a thimble provided on the sail and has the effect of pulling the sail downwards.

In this second embodiment (see FIGS. 4 and 6), the support device 3 constituting the lower part of the mast base consists of a guide sleeve 2 with a central pin 7 on the inside.
6.

The locking device 10 is designed as a rotational connection, ie a bayonet connection in this embodiment, as will become clear later in the description. fuselage 2
After inserting the mast base 1 into the sleeve 11 which is fixed in the foam core of the mast, the locking device 10 locks the support device 3 to the fuselage 2.

A more detailed description of this bayonet lock device will be provided later. In this regard, please refer to the detailed drawings in FIGS. 5-6.

Returning to FIG. 4, the central pin 7 has a large diameter head 20 at its lower end and a helical spring located between the head 20 and a shoulder 27 (see FIG. 6) at the inner top of the guide sleeve 26. 21. A washer 22 is interposed between the spring 21 and the shoulder 27, if necessary.

Top surface 28 of the head 29 of the lower part 3 of the mast base
The central pin 7, which extends up to has been done.

The universal joint 4 is fixed to the top end of the central pin 7 by means of its own threaded bolt 24 with an intervening washer 23. In this second embodiment, since the universal joint 4 is in the form of a silent block having threaded stems or bolts 24 and 25 at both ends thereof, the mast 6 is supported by the pipe joint 5 or the threaded bolt 25. It is connected to the universal joint 4. In this second embodiment, if this universal joint 4 is rotated about its upright axis, the central pin 7 is also rotated. However, this central pin is braked due to the force of the spring 21 acting on itself. For this purpose, the universal joint 4 and the pipe joint 5 are
For the connection between the two, it is best if one can be rotated freely relative to the other.

The function of this mast base device with respect to preventing any injury, in particular injury from getting a limb caught between the mast 6 and the upper surface of the sailboard body 2, is the same as in the first embodiment of the invention described above. be.

A description of a locking device in a second embodiment of the invention will now be given with reference to FIGS. 5 to 8.

As shown, the guide sleeve 26 has an annular projecting lip or collar 30 a distance below the mast base lower support head 29. This lip 30 has two back-to-back (opposed) flats 31, the distance between which is equal to the diameter of the guide sleeve 26. On the inner side of the upper end face of the sleeve 11 there are two projections or fingers indicated by the reference numeral 32 which, when the mast base 1 is slid into the sleeve 11, are attached to the annular projection lip 30. come to the top position.

According to a preferred embodiment of the invention, these protrusions 32 are formed by a single U-shaped spring member 35 (FIG. 7).
It takes the form of two legs 33 and 34 of. These legs are moved in a radial plane within guide holes or grooves 36 formed in ears 37 at the top of sleeve 11.

When the mast base 1 is slid into the sleeve 11, the radial force acting on this sleeve is in this embodiment of the invention by moving the foot of the spring member 35 radially within the guide hole 36. Can be adjusted. This is because when the annular projecting lip 30 is pushed downwardly through the legs 33 and 34 of the spring member, the distance that these legs 33, 34 are moved will be changed.

These two legs 33, 34 and an annular protruding lip 30 having a flat portion 31 are connected to the sleeve 11.
A locking device is provided which is latched and unlatched by rotation like a bayonet connection to lock the mast base therein. For this purpose, the mast base is attached to the flat part 3 of the guide sleeve 26.
1 is slid into the sleeve 11 along the legs 33 and 34. When the mast base is fully pushed into the sleeve 11, i.e.
When the head 29 of the mast base lower part 3 is seated in the ear 37 of the sleeve 11, the mast base lower part 3 is rotated through an angle of 90° so that each member is in position as shown in FIG. I am forced to do it.

In order to ensure that the relative position of each member for maintaining the locking condition described above has no chance of changing for any reason which would undesirably cause the device to become unlocked, Another second locking device 38 on the head 29 of the lower part 3
is installed. This locking device, which can be manually unlocked, is used to maintain the locked position of each member by preventing any rotation of the lower part 3 of the mast base in relation to the sleeve 11.

In this embodiment, the head 29 is made wider on one side (FIG. 8), and the second locking device 38 is adapted to pass through the lower end surface 41 of the one side extension 42 of the head 29. It has a pin 39 that is pushed downward by a spring 40. This pin 39 is placed opposite one of said flats 31 and the sleeve between the legs 33 and 34 of the spring 35 is in the locked end position when the mast base 1 is in place. Hole 43 in ear 37 of No. 11 (7th
(Figure).

This second locking device 38 is lifted out of the sleeve 11 and unlocked in this embodiment by manually lifting the locking device (using the hole 45 in the handle 44).
The mast base 1 can thereby be taken out of the sleeve 11. If desired, a short piece of rope may be tied to hole 45. When the second locking device 38 is unlocked, the pin 39 is simply moved upwardly into the hole 46 against the force of the spring 40.

In this embodiment, the head 29 is connected to the tether 48 (FIG. 8), since the mast base 1 is completely pulled out of the sailboard body in the event of an overload. It further has a transverse hole 47 for this purpose. Note that the other end of the tether 48 is connected to the body 2, but this is not shown.

〔Effect of the invention〕

As described above, the present invention provides a mast for a sailboard, which has an adjustable spring part to prevent injury to a user of the sailboard, and includes a universal joint for connecting the mast to the body of the board. a base, the mast base being fixed to the upper surface of the sailboard body so as to support the mast on the sailboard, and coupled to the universal joint provided between the lower end of the mast and the mast support device; a central pin extending downwardly through a central portion of the mast support and forming a part of the mast support, the central pin having a large diameter head at its lowermost end; the center pin and the support device are capable of being moved substantially perpendicularly upwardly relative to the sailboard body with respect to the support device together with the universal joint; The first effect of having a spring between them is that even if the mast is pulled upward for some reason during sailing, the mast base will not separate from the sailboard body. What's more, even if the mast should fall, the mast base can elastically recede approximately perpendicular to the decking surface of the sailboard, allowing sailors to sail with peace of mind without incurring any injuries. . In other words, since the bending element is placed on the top of the sailboard and the telescopic element is placed separately inside the sailboard, the bending element can be placed close to the surface of the sailboard, fully achieving both the safety and operability functions mentioned above. It is possible.
Further, according to the first invention, there is provided a sailboard mast base having a simple structure, lightweight and inexpensive locking device.

Further, according to a second invention, there is provided a sailboard having an adjustable spring portion for preventing injury to a user of the sailboard, and comprising a universal joint for connecting a mast to the body of the board. a mast base comprising a support device and a central pin forming part of the support device and connected to the universal joint, the support device being fixed to the body of the sailboard; the central pin is movable with a universal joint relative to a fixed support device in an upward direction substantially perpendicular to the body of the sailboard and further provides resistance to movement of the central pin; a spring, the support device being captured within a sleeve fixed within the body of the sailboard by a method selected from gluing or casting in place, and further comprising: a spring; A mast base is provided, characterized in that it comprises a locking device for fixing the device in the sleeve, said locking device being able to be unlocked by rotation similar to a bayonet connection, the mast base having said locking device. Since the sailboard can be completely pulled out from the sailboard body through the sailboard body, in addition to the first invention, the sailor's limbs are not caught between the mast base and the decking surface of the body.
Injuries can be completely prevented. In addition, it is equipped with a unique lightweight locking device that allows the mast base to be firmly connected and fixed to the sailboard body. Furthermore, even if the mast is extracted from the fuselage, it is possible to keep the mast and the fuselage connected by simple and safe means.

Furthermore, a common advantage of the first and second inventions is that the mast can be elastically fixed to the body of the sailboard, ensuring that it is suitable for all sailing conditions. Moreover, its elasticity can be easily adjusted as appropriate.

The invention may suggest many further possibilities. That is, it provides a strong bond or restraint between the mast base and the sailboard body, while still providing a strong connection or restraint between the mast base and the sailboard body, while preventing injuries caused by trapping limbs between the mast and the deck. The design of the mast base has internal elasticity that allows it to be pulled away from the mast.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side sectional view showing a first embodiment of the mast base structure of the present invention, Fig. 2 is a sectional view taken along the line - in Fig. 1, and Fig. 3 is a mast base structure of the present invention. FIG. 4 is a partially cutaway side sectional view of a second embodiment of the present invention; FIG. 4 is a partially cutaway side sectional view taken from substantially the same angle as FIG. , FIG. 5 is an enlarged partially cutaway sectional view of the locking device of the present invention shown in FIG. 4, and FIG. 6 shows the same outline as FIG. Angular cross section, 7th
The figure is a plan view showing a locking device having one pin and a sleeve combined with the locking device used in the embodiments shown in FIGS. 4 to 6, and FIG. It is a sectional view of the ivy. 1 is a mast base, 2 is a sailboard body, 3 is a support device, 4 is a universal joint, 5 is a pipe joint, 6 is a mast, 7 is a central pin, 8 is a guide sleeve, 10 is a locking device, 11 is a sleeve, 14 18 is an adjustment sleeve, 18 is a projection piece, 30 is an annular projection lip, 38
is the second locking device.

Claims (1)

[Scope of Claims] 1. A mast base of a sailboard, comprising an adjustable spring part to prevent injury to a sailboard user, and a universal joint for connecting the mast to the body of the board, comprising: , the mast base has a mast support device fixed to the upper surface of the sailboard body for supporting the mast, and the upper end portion is coupled to the universal joint provided between the mast lower end and the mast support device; and extends downwardly through the central portion of the mast support device to form a part of the mast support device, and has a large diameter head at the lower end and defines a portion of the mast support device. a central pin movable upwardly substantially perpendicular to the sailboard body with the universal joint; and a spring disposed between the central pin and the support device to provide resistance to movement of the central pin. A mast base comprising: 2. The mast support device has a tubular body containing the central pin, the spring is interposed between the lower end of the tubular body and the large diameter head of the lower end of the central pin, and the central pin is connected to the universal joint. The mast base according to claim 1, wherein the mast base is directly connected to the mast base. 3. Claims 1 or 2, characterized in that the mast support device is fixed within the fuselage by one of methods such as being cast into the fuselage or bonded to the fuselage. Mast base as described in section. 4. A sleeve is secured to the fuselage, either by being cast into the fuselage or by being glued to the fuselage, the sleeve being constructed to capture the support device. ,
3. A mast base according to claim 1, further comprising a locking device for securing the support device to the sleeve. 5. The mast base of claim 1, wherein the spring is adjustable to provide a force acting in a direction opposite to the axial upward movement of the central pin. . 6. The mast base of claim 5, further comprising an adjustment mechanism for varying the force of the spring. 7. A mast base according to claim 1, further comprising a guide sleeve in the center of the mast support device, in which the central pin is guided parallel to itself. 8 A patent further comprising a pipe joint for supporting the mast of the sailboard, characterized in that the rotational movement of the universal joint relative to other members of the mast base is carried out at this pipe joint part on the upper part of the universal joint. A mast base according to claim 1. 9. A sailboard mast base having an adjustable spring portion to prevent injury to the sailboard user and comprising a universal joint for coupling the mast to the body of the board, the mast base comprising: a mast support device fixed to the upper surface of the body of the sailboard for supporting the mast; an upper end coupled to the universal joint provided between the lower end of the mast and the mast support device; extending downwardly through a central portion of the mast support device to form part of the mast support device and having a larger diameter head at the lower end to connect the central portion of the mast support device to the sailboard along with the universal joint. a central pin movable upwardly substantially perpendicular to the body of the mast; and a spring disposed between the central pin and the support device to provide resistance to movement of the mast; The support device is captured within a sleeve fixed within the body of the sailboard by a method selected from either gluing or casting in place; A mast base, characterized in that it is provided with a locking device for fixing therein, which locking device can be unlocked by rotation, similar to a bayonet connection. 10 The locking device having a bayonet connection function has two flat surfaces formed to be captured by the sleeve and locked in place at the lower part of the mast base constituted by the guide sleeve. and two projecting pieces through which the flat surface of said annular projecting lip is moved, whereby the lower part of said mast base is moved into said sleeve by rotating itself. 10. A mast base according to claim 9, wherein the mast base is locked to the base of the mast. 11. The mast base according to claim 10, wherein the protruding piece has a spring function that allows adjustment of spring force. 12. The projecting piece comprises a U-shaped spring member with two legs, at least a part of which rests on the annular projecting lip in the inner hole of the sleeve. A mast base according to claim 11. 13. The mast base of claim 12, wherein said U-shaped spring member is movable within two slot-like guide holes in said sleeve. 14 further comprising a second locking device capable of retaining the locked position of said locking device and being unlocked, said second locking device preventing rotation of the bottom of the mast base within and relative to said sleeve; The mast base according to any one of claims 9 to 13, characterized in that the mast base prevents damage. 15. The second locking device includes a pin, a spring that biases the pin downward, and is provided in the sleeve to capture the pin when the pin is pushed down to a terminal position for locking operation. 15. The mast base according to claim 14, further comprising a hole in which the mast base is provided with a hole. 16. The mast base of claim 15, wherein said second locking device includes a handle for manual unlocking.