JP5721895B1 - Propeller gauge with fixed measuring position - Google Patents

Abstract

A propeller cage having a fixed measurement position that can easily and reliably measure, store, and correct the blade surface shape of a blade of a propeller. A shaft 1 in which a lower portion 1b can be inserted into a hollow portion of a propeller boss 102 of a propeller 100, a connecting portion 2 extending in a radial direction from the upper portion 1a of the shaft, and a radial direction of the connecting portion 2 on a shaft side and a distal end side. When divided, the measuring part 3 that extends downward on the tip side and can contact at least the line pq (where p and q are both ends of the line) with the blade surface of the blade of the propeller, the shaft side of the connecting part or the shaft A measuring position fixed type propeller gauge comprising a fixing part 4 for fixing the rotatable shaft 1, which extends downward in the upper part and can come into contact with the blade surface of the blade in a root area BA of the blade 101 extending from the propeller boss 102. I will provide a. [Selection] Figure 1

Description

  The present invention relates to a propeller gauge capable of measuring and storing the shape of the propeller blades of a boat racing outboard motor.

  The shape of the propeller blades of a racing outboard motor greatly affects the speed of the motorboat. A boat racer uses a propeller gauge to memorize the shape of a propeller blade that has received a good feeling in the past, and uses a propeller gauge to reproduce and reshape the current blade by processing or modifying it. In addition, the propeller is compatible with boats and motors, and it is optimized by repeatedly adjusting the shape of the blade and performing trial operation, but if the shape before correction is stored using a propeller gauge It is possible to determine what effect the change in the position of the curved surface of the blade has on the propulsive force of the boat as a whole propeller.

  A commonly used propeller gauge 110 is shown in FIG. The propeller gauge 110 is the same as that described in the prior art in FIG. 8 of Patent Document 2 to be described later. And a measuring part 113 extending downward from the tip of the connecting part 112. When the shape of the blade surface of the propeller 100 is stored using the propeller gauge 110, the plastic measuring unit 113 is shaved with a file to match the blade surface of the propeller 100. When reproducing the memorized shape of the blade surface on another propeller to be adjusted using the propeller gauge 110 having the measuring unit 113 matched with the blade surface of the propeller 100, the shaft 111 is inserted and the propeller is inserted. The blade surface is struck with a mallet or the like until the blade surface and the measuring unit 113 are matched.

  Prior to April 2012, boat racers were able to purchase and own propellers, so they could reuse their favorite propellers and participate in the race with repeated corrections and trial runs until a satisfactory blade shape was obtained. It was. However, after April 2012, boat racers can no longer own propellers, and the propellers installed on the boat's outboard motors are borrowed at the race track, so the propellers can no longer be taken home and enter the race. It was necessary to modify the blade surface of the propeller blades to a desired shape within a limited time. Also, the propellers provided are often used by other players before, and the shape reflects the player's preferences and habits. It is more difficult than correcting a new propeller. Therefore, there is a growing need for a propeller gauge that is easy to operate and reliable.

Patent Document 1 discloses a propeller blade blade surface shape recording device for an outboard motor of a racing boat, a shaft portion inserted into a hollow portion of a propeller boss, a connecting portion extending from the shaft portion, and a connecting portion. The recording gauge unit is configured to be fixed, and the recording gauge unit includes a support body to which the coupling unit is fixed, and a plurality of adjustment screws arranged on the support body at predetermined intervals toward the outer end of the blade. The adjusting screw is screwed to the support body and is capable of moving up and down so that the amount protruding from the support body can be adjusted according to the blade surface shape of the blade.
Patent Document 2 discloses, as a propeller gauge, an insertion portion that is inserted into a hole formed in a central portion of the propeller, a shaft portion that is connected to the insertion portion, and a shape storage portion that is connected to the shaft portion and stores the shape of the propeller. The shape memory unit is formed with a plurality of rod-shaped members for contacting the propeller and holes for passing the plurality of rod-shaped members, and the plurality of rod-shaped members can be moved in the axial direction of the plurality of rod-shaped members. And holding the plurality of rod-shaped members in the axial direction by tightening in a direction perpendicular to the axial direction from a state in which the plurality of rod-shaped members are held by the holding portion so as not to move in a direction orthogonal to the axial direction. There is provided a gauge including a fixing portion that is fixed so as not to move.

Japanese Patent No. 5073864 JP 2014-16331 A

The present inventor uses the propeller gauge 110 shown in FIG. 15 for the reason that it is difficult to reproduce the memorized blade surface shape to the target propeller. It is not difficult to precisely cut the plastic measuring unit 113 with a file so as to match, but when reproducing the shape of the blade surface, the position on the blade surface to be reproduced is moving I found it. That is, since the gauge is fixed at the portion where the measurement portion 113 is in contact with the blade surface to be reproduced by rotating the shaft 111, the measurement portion also serves as the fixed portion, and the memorized blade surface on the propeller It has been found that there is no positioning reference that makes the position and the position on the propeller of the blade surface to be reproduced the same, and that the blade surface shape is only reproduced at the portion where the measuring unit 113 is in contact. It only reproduces the shape at a position where the vertical protrusion of the blade surface is the same as the vertical protrusion of the memorized blade surface. An error that cannot be ignored occurs due to the movement of the position at the time of correction due to the above. For example, if the position of the blade surface on the propeller is high, if you attempt to rotate and reproduce the shaft 111, it will not reach the memorized blade surface position and will stop before it, and if the blade surface position is low, the shaft 111 will rotate. If you try to reproduce it, the stored position will pass, and the shape will be matched at another position with different height on the wing surface.
In the wing surface shape recording device of Patent Document 1, in order to record the angular position when the shaft portion is inserted into the hollow portion of the propeller boss, a mark is given to the lower portion (back surface) of the shaft portion. Since the portion cannot be fixed, there is a problem that the shaft portion is rotated and misaligned when the protruding amount of the adjusting screw from the support body is adjusted in accordance with the blade surface shape of the blade. In addition, since the adjustment amount of the adjustment screw is visually observed from the upper part of the shaft part, the lower part (back side) of the marked shaft part cannot be seen at the same time. ) Has to be confirmed, and there is a problem that the work efficiency is deteriorated.
In the propeller gauge of Patent Document 2, the shape memory unit includes a bar-shaped member 9 that is thicker than the bar-shaped member 4 disposed in the lower central portion so as to face the propeller direction, and serves as a mark for positioning the propeller gauge. However, since it is arranged at the center of the blade surface of the propeller blade, the blade surface shape at the position where the rod-like member 9 is placed is affected by the correction of the propeller, for example, up and down, and the blade surface of the propeller blade is changed. There is a problem that an error occurs in memory of shapes.
In other words, Patent Document 1 and Patent Document 2 describe that the reason why it is difficult to reproduce the memorized blade surface shape on the target propeller is to match the blade surface when storing the blade surface shape. A propeller gauge that does not use a file is provided based on the idea that it is difficult to accurately cut the measurement unit 113 of the file. Therefore, the difficulty of cutting with a file can be overcome, but the memorized position of the blade surface on the propeller and the position on the propeller of the blade surface to be reproduced are fixed. Therefore, a non-negligible error occurs in the reproduction of the blade surface shape.
Further, in Patent Document 1, the blade surface shape of the blade is specified by bringing the tip of the adjustment screw into contact with the blade surface, and in Patent Document 2, the blade surface shape of the blade is brought into contact with the blade surface of the blade member 4. Since both are specified and the blade surface shape of the blade is traced with a point, a large number of adjustment screws and rod-like members 4 are required, which not only complicates the operation but also tends to cause visual errors.
The present invention provides a propeller cage capable of easily and reliably measuring, storing, and correcting the blade surface shape of a propeller blade.

The inventor is less affected by the correction of the blades such as a mallet, and the positioning reference that makes the memorized position of the blade surface on the propeller the same as the position on the propeller of the blade surface to be reproduced. The present invention has been completed by finding that the accuracy of reproduction is greatly improved by using a propeller cage of a fixed measurement position that is a thicker blade root region than other regions.
According to the present invention, when a shaft capable of inserting a lower portion into a hollow portion of a propeller of a propeller, a connecting portion extending in a radial direction from the upper portion of the shaft, and dividing a radial direction of the connecting portion into a shaft side and a tip side, A measuring part that extends downward on the tip side and can contact at least the line pq (where p and q are both ends of the line) with the blade surface of the blade of the propeller, the shaft side of the connecting part or the shaft A measuring position fixed type propeller gauge comprising a fixing portion for fixing the rotatable shaft, which extends downward from an upper portion of the blade and is in contact with a blade surface of the blade in a root region of the blade extending from the propeller boss. Can be provided.
In a preferred aspect of the propeller gauge of the measurement position fixed type according to the present invention, the connecting portion is immovable on the shaft side and vertically movable pieces or circumferential left and right movable pieces with a gap extending in the radial direction on the tip side. Is flexible so that it can be moved vertically or horizontally by contracting or expanding the gap with an adjusting screw provided on at least one of the vertically movable pieces or at least one of the horizontally movable pieces. A movable part, wherein the measuring part extends downward from the upper or lower movable piece or from the right or left movable piece, and can contact the blade surface of the blade of the propeller at least on the line pq. By moving the tip side of the movable part in the vertical direction or the horizontal direction, the measurement part brings at least the entire line pq into contact with the blade surface of the blade. You can trace the blade surface of the blade.
In a preferred first embodiment of the preferred aspect, the upper movable piece and the lower movable piece are separated from each other between the plate surface of the upper movable plate and the lower movable plate with the gap interposed therebetween via a spacer disposed on the shaft side. (I) a first through screw hole in which one of the upper movable plate and the lower movable plate is directed to the gap in the vertical direction, and the first through screw hole A first adjusting screw inserted toward the gap, and / or (ii) the upper movable plate at a different position in the circumferential direction that may or may not be the same distance from the shaft as the first through screw hole. And the lower movable plate have a second hole in the vertical direction toward the gap, and the other has a second screw hole communicating with the second hole, and further from the second hole. Before being inserted into the gap A second adjusting screw that can be inserted into the second screw hole is provided, and the measuring portion extends downward from the upper movable plate or the lower movable plate in the circumferential direction, and contacts with the blade surface of the blade at least at the line pq When the first adjustment screw is turned and screwed into the first through screw hole, it stops when the tip of the first adjustment screw comes into contact with the other movable plate, and when further turned, the upper movable plate and When the gap of the lower movable plate expands in the vertical direction and the measurement unit extends from the upper movable plate, it acts to move away from the blade surface of the blade, and when the measurement unit extends from the lower movable plate Acting so as to approach the blade surface of the blade, and turning the second adjusting screw into the second screw hole through the second hole, the second screw hole is passed through the second hole and then the second screw hole. The head of the second adjustment screw enters and the second bar It stops at the inlet of the hole, and when further turned, the gap between the upper movable plate and the lower movable plate contracts in the vertical direction so that when the measuring part extends from the upper movable plate, it approaches the blade surface of the blade. When the measuring unit extends from the lower movable plate, it acts to move away from the blade surface of the blade, and by combining both operations, at least the entire line pq is brought into contact with the blade surface of the blade. The blade surface of the blade can be traced.
In a preferred second embodiment of the preferred embodiment, the upper movable piece and the lower movable piece are separated from each other between the plate surface of the upper movable plate and the lower movable plate via a spacer disposed on the shaft side with the gap interposed therebetween. (I) a first through screw hole in which one of the upper movable plate and the lower movable plate is directed to the gap in the vertical direction, and the first through screw hole A first adjusting screw inserted toward the gap, and / or (ii) one of the upper movable plate and the lower movable plate in the vertical direction at a position different from the first through screw hole in the radial direction. The second screw hole is provided to the gap, and the other has a second screw hole that communicates with the second screw hole, and is inserted into the second screw hole from the second screw hole toward the gap. With a second adjustment screw that can be inserted The measurement unit is a measurement unit that extends downward in the radial direction from the upper movable plate or the lower movable plate and is capable of contacting at least the line pq with the blade surface of the blade, and the first through screw hole When the first adjusting screw is turned and screwed in, it stops when the tip of the first adjusting screw comes into contact with the other movable plate, and when further turned, the gap between the upper movable plate and the lower movable plate expands in the vertical direction, When the measurement unit extends from the upper movable plate, it acts to move away from the blade surface of the blade, and when the measurement unit extends from the lower movable plate, it acts to approach the blade surface of the blade, the second When the second adjusting screw is turned and screwed into the second screw hole through the hole, the head of the second adjusting screw enters the second screw hole after passing through the second hole. Stops at the entrance of the fool hole and turns further to move the upper movable plate When the gap of the lower movable plate contracts in the vertical direction and the measurement unit extends from the upper movable plate, it acts so as to approach the blade surface of the blade, and when the measurement unit extends from the lower movable plate By acting away from the blade surface of the blade, the blade surface of the blade can be traced by combining both operations and bringing the blade surface of the blade into contact with at least the entire line pq.
In a preferred third embodiment of the preferred embodiment, the movable portion is configured such that the gap is formed by a radial notch introduced on a distal end side of a movable plate whose circumferential direction is disposed in the thickness direction and whose plate surface extends in the vertical direction. The upper movable piece and the lower movable piece are separated from each other, and (i) one of the upper movable piece and the lower movable piece is formed into a first through screw hole and a first through screw hole in the vertical direction. A first adjusting screw that is inserted toward the gap, and / or (ii) one of the upper movable piece and the lower movable piece is vertically moved at a position different from the first through screw hole in the radial direction. A second screw hole is provided in the direction and the other has a second screw hole communicating with the second screw hole, and is inserted into the second screw hole from the second screw hole toward the gap. An adjusting screw is provided, and the measuring section is It is a measuring part that extends downward from the moving piece and can contact at least the line pq with the blade surface of the blade. When the first adjustment screw is screwed into the first through screw hole, the first adjustment is performed. When the tip of the screw comes into contact with the other movable piece, it stops, and when further turned, the gap between the upper movable piece and the lower movable piece expands in the vertical direction so that the measurement unit approaches the blade surface of the blade, When the second adjustment screw is turned and screwed into the second screw hole through the second hole, the head of the second adjustment screw is inserted into the second screw hole after passing through the second hole. Stops at the entrance of the second hole, and when it is further turned, the gap between the upper movable piece and the lower movable piece contracts in the vertical direction so that the measuring unit moves away from the blade surface of the blade. At least the entire line pq is the wing surface of the blade. The blade surface of the blade can be traced by contact.
In a fourth preferred embodiment of the preferred embodiment, the movable portion is movable to the left with the gap in the circumferential direction by a radial cut introduced on the distal end side of a movable plate having a plate surface arranged in the circumferential direction. And (i) one of the left movable piece and the right movable piece is inserted into the first through screw hole in the left-right direction and into the first through screw hole toward the gap. And / or (ii) one of the left movable piece and the right movable piece in the left-right direction at a position different from the first through screw hole in the radial direction. And the other includes a second screw hole that communicates with the second hole, and a second adjustment screw that is inserted from the second hole toward the gap and can be inserted into the second hole. The measuring part is the left movable piece or the right possible in the radial direction. Extending downward from any one of the pieces, the blade makes contact with the blade surface of the blade at least at the line pq at a large or small angle in the range of 5 to 30 degrees from the vertical. When the first adjustment screw is turned and screwed into the first through screw hole, it stops when the tip of the first adjustment screw comes into contact with the other movable piece, and when further turned, the left movable piece and the right The gap of the movable piece expands in the circumferential direction, and the measuring unit acts so as to move the blade surface of the blade in the first circumferential direction, and passes through the second burr hole to the second screw hole to the second adjustment screw. When the screw is turned and screwed in, it passes through the second hole and enters the second screw hole and the head of the second adjustment screw stops at the entrance of the second screw hole. The gap of the right movable piece contracts in the circumferential direction, and the measuring unit is the blade The blade surface of the blade is moved in the second circumferential direction opposite to the first circumferential direction, and both blades are combined to bring the blade surface of the blade into contact with at least the entire line pq. Can be traced.
In a preferred first embodiment of the preferred aspect, preferably, the first through screw hole and the first adjustment screw are located at positions where the distance from the shaft may be different or the same in the circumferential direction of the movable portion. There are at least two sets, and there are at least two sets of the second burr hole, the second screw hole, and the second adjustment screw. In any one of the second to fourth preferred embodiments of the preferred embodiment, preferably, the first through screw hole and the first adjustment screw are located at positions where the distance from the shaft is different in the radial direction of the movable portion. There are at least two sets, and there are at least one set of the second burr hole, the second screw hole, and the second adjustment screw.
In the preferable aspect, the vertical direction of the connecting portion or the movable portion is preferably inclined in correspondence with the pitch angle of the propeller from the vertical direction of the shaft. Moreover, in the preferable aspect, preferably, a reinforcing material is provided at a contact portion of the upper movable piece or the lower movable piece, the left movable piece, or the right movable piece, which is the other, with which the tip of the first adjustment screw comes into contact. Place.

  According to the propeller cage of the measurement position fixed type of the present invention, the measurement, storage, and correction of the blade surface shape of the propeller blades can be performed easily and reliably.

The preferable aspect of the propeller gauge of this invention is shown. The blade root area of the propeller is shown. The relationship between the developed view of the propeller and the radius R of the circle drawn by the tip of the wing when the propeller makes one revolution is shown. The preferable aspect of the propeller gauge of this invention is shown from a shaft direction. When the fixed part of the propeller gauge extends from the upper part of the shaft, (A) an example of the fixed part arranged on the same blade surface as the measured blade surface, (B) arranged on a blade surface different from the measured blade surface The example of the fixing | fixed part made is shown. The 1st example of a form of the propeller gauge of this invention is shown. The propeller gauge of the 1st example of this invention is shown from a shaft direction. The 1st adjustment screw, the 1st penetration screw hole, the 2nd adjustment screw, the 2nd burr hole, and the 2nd screw hole in the 1st form example of the propeller gauge of the present invention are shown. It is the figure which installed the propeller gauge of the 1st form example of this invention in the propeller. The 2nd example of a propeller gauge of the present invention is shown. The 1st adjustment screw, the 1st penetration screw hole, the 2nd adjustment screw, the 2nd burr hole, and the 2nd screw hole in the 2nd example of a propeller gauge of the present invention are shown. The 3rd example of a propeller gauge of this invention is shown. The 1st adjustment screw, the 1st penetration screw hole, the 2nd adjustment screw, the 2nd burr hole, and the 2nd screw hole in the 3rd example of a propeller gauge of the present invention are shown. The 4th example of a propeller gauge of the present invention is shown. A conventional propeller gauge is shown.

A fixed position measuring type propeller gauge of the present invention will be described based on a specific example of FIG.
The propeller 100 includes a blade 101 and a propeller boss 102, and a lower portion 1b of the shaft 1 of the propeller gauge can be inserted into a hollow portion of the propeller boss. Normally, when viewed from the rear of the boat, the propeller rotates counterclockwise, but when the boat advances, the front edge 101a is the side where the propeller begins to drain water, and the side where the water flow is away from the propeller is the rear edge 101b. The propeller gauge shaft can be inserted into either of the two open ends of the hollow part of the propeller boss, but the side where the propeller shaft is not inserted because there is a step with the shear pin housing groove 103 on the side where the propeller shaft is inserted. It is preferable to insert the lower part 1b of the shaft 1 into the shaft. The length of the portion inserted into the hollow portion of the propeller lab of the propeller gauge may be a length that can hold the propeller gauge and does not protrude from the propeller lab. Preferably, the diameter of the lower part 1b of the shaft 1 is smaller than the diameter of the hollow part of the propeller boss, and the diameter of the upper part 1a of the shaft 1 is larger than the diameter of the hollow part of the propeller boss as shown in FIG. If a step is provided in the upper part, the length of the portion inserted into the hollow portion of the propeller boss can be easily adjusted by adjusting the position of the step.

  According to the present invention, the propeller gauge extends downward on the tip side when the shaft 1, the connecting portion 2 extending in the radial direction from the upper portion 1a of the shaft, and the radial direction of the connecting portion 2 are divided into the shaft side and the tip side. , The measuring unit 3 that can contact the blade surface of the propeller blade at least on the line pq (where p and q are both ends of the line), and extend downward on the shaft side of the connecting part or on the upper part of the shaft. There is provided a propeller gauge of a fixed measurement position type including a fixing portion 4 for fixing a rotatable shaft, which can come into contact with the blade surface of the blade in the root region of the extending blade.

As shown in FIG. 2, the fixing portion is brought into contact with the blade surface of the blade in the blade root area BA extending from the propeller boss. Since the root area BA has a certain range, the tip of the fixing portion does not need to be sharp, and may be any shape that can be contacted and fixed in the root area BA. FIG. 2 shows a root area BA on the same blade surface as the blade surface measured using the propeller gauge shown in FIG. 1, but is not limited to the same blade surface as the blade surface to be measured, and the blade surface to be measured The fixed portion may be brought into contact with the root area BA on the other blade surface different from the above. When the position of the blade surface to be measured is close to the root area BA on the blade surface, the fixed section and the measurement section are gathered by bringing the fixed section into contact with the root area BA on the other blade surface. There are advantages that can be avoided.
Except for the front edge portion of the propeller (the front edge 101a and its surroundings) and the rear edge portion (the rear edge 101b and its surroundings), the blades extend radially from the propeller boss and become thin after passing through the root, and have a substantially constant thickness. However, it is thick in the root area BA of the blade adjacent to the propeller boss. The shape of the blade root area BA is unlikely to fluctuate depending on the lot of the propeller, and even if the other shape of the blade is modified with a mallet or the like, it is less affected by the thickness, so measurement It is optimal as a reference point for specifying the position of the part. The root area BA of the blade adjacent to the propeller boss, which is thicker than the other blade portions and not affected by the mallet, is empirically used by those skilled in the art who have modified the blade surface shape using the mallet. Although it can be easily understood, it is not easy to quantify it.
For example, the root region, adjacent to the propeller boss and excluding the front and rear edge portions of the propeller, preferably a region of a shape similar to the shape of the ear that preferably falls within 20% of the total surface area of the blade surface Can do. In other words, in the range of the thickness of the blade surface of one blade, it can be said that it is a region adjacent to the propeller boss that falls within the upper 20% of the thickness. Further, assuming that the radius of the circle drawn by the tip of the blade when the propeller makes one revolution is R, the tip of the blade is 1.0R, and the central axis of the hollow portion of the propeller is zero, the development view of the propeller shown in FIG. Based on this, the root area BA is preferably an area within 0.3R adjacent to the propeller boss, preferably 15 mm or more inside from the front edge 101a of the propeller, preferably 10 mm or more inside from the rear edge 101b of the propeller. It can also be said that this is an area. This is consistent with a specification example in which a maximum blade thickness of 0.3R is 5.9 mm and a blade thickness at a position of 0.1 mm from the tip is 0.7 mm or more as a boat race propeller.
By providing a fixed portion in the thick root area BA, the influence of the blade blade surface correction by the mallet or the like is less likely to be affected, the positioning reference is fixed, and the stored blade surface position on the propeller and the blade to be reproduced The position of the surface on the propeller can be made the same, and the reproduction accuracy is improved.

In the present specification, as shown in FIG. 1, in the vertical direction, the direction in which the shaft is inserted into the hollow portion of the propeller boss is referred to as the downward direction, and the opposite is referred to as the upward direction. As shown in FIG. 1, when the propeller gauge is installed on the propeller, the direction in which the measuring unit of the propeller gauge is brought closer to the blade surface of the propeller blade is referred to as the downward direction, and the opposite is referred to as the upward direction. In order to bring the propeller gauge measuring section into contact with the blade surface of the propeller blade, as shown in FIG. 4, the angle θ ₁ formed by the vertical direction of the connecting section and the vertical direction of the shaft should be the same as the pitch angle of the propeller. Is preferred. In this case, although the vertical direction of the connecting portion is inclined by a pitch angle from the vertical direction of the shaft, both are referred to as the vertical direction in this specification.
In this specification, the radial direction and the circumferential direction are determined by rotating the propeller gauge around the shaft (axis) and moving it on the blade surface of the blade of the desired propeller. A direction in which the radius extends is called a radial direction, and a direction in which the circumference is drawn is called a circumferential direction.

The fixing portion extends downward from the shaft side of the connecting portion, or extends downward at the upper portion of the shaft, and can come into contact with the blade surface of the blade in the root region of the blade extending from the propeller boss. The fixing portion 4 in FIG. 1 is an example in which the fixing portion of the propeller gauge extends downward from the shaft side of the connecting portion. FIG. 5 shows an example of a fixed portion arranged on the same blade surface as the measured blade surface when the fixed portion of the propeller gauge extends from the upper part of the shaft, and (B) different from the measured blade surface. The example of the fixing | fixed part arrange | positioned at a blade surface is shown.
The fixing part may extend from either the shaft side of the connecting part or the upper part of the shaft, but the former is preferable from the viewpoint of ease of attachment, but when the connecting part is short or different from the blade surface to be measured The latter is preferred when the fixed part is brought into contact with the root area BA on the other blade surface.

The measurement part should just be the shape which extends below in the front end side of a connection part, and can contact with the wing | blade surface of the blade | wing of a propeller at least with the line pq (however, p and q are the both ends of a line). “At least line pq” means that the line pq has a thickness and may contact the blade surface as a surface, but as the surface becomes thicker, the surface becomes larger and the entire surface is brought into contact with the blade surface. Therefore, it is preferable that the measurement unit has a reduced thickness at the contact portion.
Since the propeller gauge measures and stores the blade surface of the propeller blade with the line pq, when one propeller gauge has one measuring unit, the number of the propeller gauge is the number of the blade surface of the propeller blade. It is the same as the number of measurement points. The more the number of measurement points on the blade surface of the propeller blade, the more accurate the shape can be reproduced. However, the number of measurement points is preferably 10 to 20 because it becomes complicated. The specific location may be selected as a location where each boat racer has a great influence on the propeller propulsive force and is considered to be highly measurable or memorized, resulting in individual differences.
By properly using propeller gauges having different measurement units with different distances from the shaft, the blade surfaces of the propeller blades can be identified by a number of lines pq. The lengths of the lines p-q do not have to be the same, and can be increased or decreased according to the shape of the blade surface at the measurement location.
The size of the propeller gauge can be selected according to the length of the line pq of the measuring unit. If the measuring unit is short, the propeller gauge itself can be reduced, and if the measuring unit is long, the propeller gauge itself is also selected. There is a tendency to grow. The propeller gauge may include two or more measurement units in the circumferential direction or the radial direction.

The material of the propeller cage including the shaft, the connecting portion, the measuring portion, and the fixing portion is not particularly limited except when the connecting portion is used as a movable portion as will be described later. In terms of ease, plastic is preferable.
The measuring unit is preferably made of plastic in that it can be cut and adjusted with a file or the like, and at least in terms of easy confirmation of contact with the line pq, it is preferable to use plastic with high transparency. Good. As a highly transparent plastic, acrylic resin (particularly preferably polymethyl methacrylate (PMMA)), polycarbonate (PC), polyvinyl chloride (PVC), polyethylene terephthalate (PET) which is a polymer of acrylic ester or methacrylic ester. Etc. Moreover, ABS resin, PLA resin, etc. are mentioned at the point which can make a propeller cage into data and can always make the same shape with a 3D printer.
A propeller cage including a shaft, a connecting part (movable part), a measuring part and a fixed part can be obtained by integrally molding, but among the shaft, connecting part (movable part), measuring part and fixed part, Any or all of these may be adhered using an adhesive or may be fused.

In a preferred aspect of the measurement position fixed type propeller gauge according to the present invention, the connecting portion 2 is stationary on the shaft side and branches into a vertically movable piece or a circumferentially movable left and right piece with a gap extending in the radial direction on the tip side. A flexible movable part 2 that can be moved in the vertical direction or the horizontal direction by contracting or expanding the gap interval with an adjustment screw provided on at least one of the vertical movable pieces or at least one of the left and right movable pieces. The measuring unit 3 extends downward from the upper or lower movable piece or from the right or left movable piece, and can contact the blade surface of the propeller blade at least on the line pq. By moving in the direction or the left-right direction, the measuring unit 3 can trace the blade surface of the blade by bringing the blade surface of the blade into contact with at least the entire line pq.
Preferred embodiments of the fixed position measuring type propeller gauge of the present invention include preferred first to fourth embodiments. First, the propeller gauge according to the present invention will be described with reference to first to fourth embodiments. It is easily understood by those skilled in the art that the present invention is not limited to these embodiments and can take many other forms. Therefore, after the description of the first to fourth embodiments, the present invention will be further explained.

A propeller gauge 10 which is a first embodiment of a propeller gauge according to the present invention will be described with reference to FIGS.
The propeller gauge 10 includes a shaft 11 in which a lower portion 11b can be inserted into a hollow portion of a propeller of a propeller, a flexible connecting portion (movable portion) 12 extending in a radial direction from the upper portion 11a of the shaft 11, and a diameter of the movable portion 12. When the direction is divided into the shaft side and the tip side, the measuring unit 13 that extends downward on the tip side and can contact with the blade surface of the blade of the propeller at least by the line pq, and the shaft side or the shaft where the movable unit 12 is immovable And a fixing portion 14 for fixing the shaft 11 so as not to rotate. The fixing portion 14 extends downward from the upper portion of the blade and can come into contact with the blade surface of the blade in the blade root area BA extending from the propeller boss.
The distal end side of the movable portion 12 is branched into an upper movable piece 12a and a lower movable piece 12b with a gap G extending in the radial direction interposed therebetween. Preferably, as shown in FIG. 6, the plate surface of the upper movable plate 12a and the plate surface of the lower movable plate 12b are vertically stacked with a gap G interposed via a spacer 12s disposed on the shaft side. Also good.
The measuring part 13 extends downward from one end in the circumferential direction on the distal end side of the upper movable plate 12a or the lower movable plate 12b, and preferably has a thickness at a portion in contact with the blade surface of the blade at least on line pq. Is thinning. When the gap G is contracted or expanded with an adjusting screw provided on at least one of the upper movable piece 12a and the lower movable piece 12b, the measuring unit 13 can be moved in the vertical direction, and at least the entire line pq is moved to the blade. The blade surface of the blade can be traced in contact with the blade surface.

  In order to bring the propeller gauge measuring section into contact with the blade surface of the propeller blade, the vertical direction of the measuring section is preferably inclined by the propeller pitch angle θ from the vertical direction of the shaft, as shown in FIG.

As shown in FIG. 8, one of the upper movable plate 12a and the lower movable plate 12b is inserted into the first through screw hole 16a toward the gap G in the vertical direction and into the first through screw hole 16a toward the gap G. The first movable screw 12a and the lower movable plate 12b are located at different positions in the circumferential direction that may be the same as or different from the first through screw hole 16a. A second burr hole 18a is provided in the vertical direction toward the gap G, and the other is provided with a second screw hole 19a communicating with the second burr hole 18a. Further, the second burr hole 18a is inserted into the gap G from the second burr hole 18a. A second adjustment screw 17a that can be inserted into the screw hole 19a is provided.
FIG. 8 shows two sets of second baffles corresponding to two second adjustment screws 17a-b in addition to the three first adjustment screws 15a-c and the corresponding three first through screw holes 16a-c. Although the holes 18a-b and the second screw holes 19a-b are shown, the numbers of the first adjustment screw and the second adjustment screw can be selected according to the shape of the blade surface of the blade and the accuracy of storing the shape. Since many propeller gauges are used to memorize the blade surface on many points, each propeller gauge preferably corresponds to at least one first adjustment screw and at least one second adjustment screw. It suffices to have at least one first through screw hole and at least one set of second fool hole and second screw hole.

As shown in FIG. 9, the propeller gauge 10 can be installed on the propeller 100 to measure the shape of the blade surface of the blade 101.
The propeller gauge 10 is installed on the propeller 100 and the lower surface of the fixed portion 14 is brought into contact with the blade surface of the blade 101. After the lower part of the fixed part 14 is brought into contact with the blade surface of the blade 101, the lower part of the measuring unit 13 is brought into contact with the blade surface of the blade 101, and the adjustment screw is brought into contact with the blade surface of the blade. Use to adjust.
When the first adjustment screw 15a, 15b, 15c is turned and screwed into the first through screw hole 16a, 16b, 16c, it stops when the tip of the first adjustment screw 15a, 15b, 15c comes into contact with the other movable plate. When the gap G between the upper movable plate 12a and the lower movable plate 12b expands in the vertical direction, and the measuring unit 13 extends from the upper movable plate 12a, the measuring unit 13 acts away from the blade surface of the blade. When extending from 12b, it acts to approach the blade surface of the blade. As shown in FIG. 8, the other movable plate with which the tips of the first adjustment screws 15a, 15b, and 15c are in contact with each other is prevented from being worn by repeated contact with the adjustment screw. A highly wearable reinforcing material RM may be installed.
Further, when the second adjusting screws 17a and 17b are screwed into the second screw holes 19a and 19b through the second hole 18a and 18b, the second screw holes 19a and 19b are passed through the second hole 18a and 18b and then passed through the second screw holes 19a and 19b. The heads of the second adjusting screws 17a and 17b stop at the entrances of the second burr holes 18a and 18b, and when further rotated, the gap G between the upper movable plate 12a and the lower movable plate 12b contracts in the vertical direction. When 13 extends from the upper movable plate 12a, it acts to approach the blade surface of the blade, and when the measuring unit 13 extends from the lower movable plate 12b, it acts to move away from the blade surface of the blade. The second screw holes 19a, 19b communicating with the second fool holes 18a, 18b may be threaded holes that do not penetrate or screw holes that do not penetrate, but when using screw holes that do not penetrate, the second adjustment screws 17a, 17b The depth is preferably such that it can be accommodated even when inserted to the maximum, and a threaded hole that penetrates is preferable in terms of ease of manufacturing. Further, the second flaw holes 18a and 18b are “buck holes” that are slightly larger than the diameters of the second adjustment screws 17a and 17b, and the second adjustment screws 17a and 17b and the second screw holes 19a and 19b are formed as fool holes. The gap G can be contracted at 19b. Since the diameter of the hole is larger than that of the screw, the screw hole is not required and is usually a hole without a screw.
By combining the adjustment by the first adjustment screws 15a, 15b, and 15c and the adjustment by the second adjustment screws 17a and 17b, at least the entire line pq can be brought into contact with the blade surface of the blade to trace the blade surface of the blade. It becomes possible.

A propeller gauge 20 as a second embodiment of the propeller gauge according to the present invention will be described with reference to FIGS.
The propeller cage 20 includes a shaft 21 into which a lower portion 21b can be inserted into a hollow portion of a propeller boss of the propeller, a flexible connecting portion (movable portion) 22 extending in a radial direction from the upper portion 21a of the shaft 21, and a diameter of the movable portion 22. When the direction is divided into the shaft side and the tip side, the measuring unit 23 that extends downward on the tip side and can contact at least the line pq with the blade surface of the blade of the propeller, and the shaft side or the shaft where the movable unit 22 is stationary And a fixing portion 24 for fixing the shaft 21 so as not to rotate. The fixing portion 24 can be brought into contact with the blade surface of the blade in the root region BA of the blade extending from the propeller boss.
The distal end side of the movable portion 22 is branched into an upper movable piece 22a and a lower movable piece 22b with a gap G extending in the radial direction interposed therebetween. Preferably, as shown in FIG. 10, the plate surface of the upper movable plate 22a and the plate surface of the lower movable plate 22b are vertically stacked with a gap G interposed via a spacer 22s disposed on the shaft side. Good.
The measuring unit 23 extends downward from the upper movable plate 22a or the lower movable plate 22b in the radial direction, and preferably has a reduced thickness at a portion in contact with the blade surface of the blade at least on the line pq. . When the gap G is contracted or expanded with an adjusting screw provided on at least one of the upper movable piece 22a and the lower movable piece 22b, the measuring unit 23 can be moved in the vertical direction, and at least the entire line pq is moved to the blade. The blade surface of the blade can be traced in contact with the blade surface.

As shown in FIG. 11 with the measurement unit 23 removed, one of the upper movable plate 22a and the lower movable plate 22b has a first through screw hole 26a and a first through screw hole 26a extending in the vertical direction toward the gap G. The first adjustment screw 25a inserted toward the gap G is provided, the distance from the shaft 21 is different from the first through screw hole 26a, and either the upper movable plate 22a or the lower movable plate 22b at a different radial direction. One is provided with a second burr hole 28 in the vertical direction toward the gap G and the other is provided with a second screw hole 29 communicating with the second burr hole 28, and is further inserted from the second burr hole 28 toward the gap G. A second adjustment screw 27 that can be inserted into the second screw hole 29 is provided.
FIG. 11 shows a pair of second burr holes 28 corresponding to one second adjustment screw 27 in addition to the two first adjustment screws 25a-b and the two first through screw holes 26a-b corresponding thereto. The number of the first adjustment screw and the second adjustment screw can be selected according to the shape of the blade surface of the blade and the accuracy of storing the shape. Since many propeller gauges are used to memorize the blade surface on many points, each propeller gauge preferably corresponds to at least one first adjustment screw and at least one second adjustment screw. It suffices to have at least one first through screw hole and at least one set of second fool hole and second screw hole.

The propeller gauge 20 is installed on the propeller 100 and the lower surface of the fixed portion 24 is brought into contact with the blade surface of the blade 101. After the lower part of the fixed part 24 is brought into contact with the blade surface of the blade 101, the lower part of the measuring unit 23 is brought into contact with the blade surface of the blade 101, and the adjustment screw is set so that the entire line pq contacts the blade surface of the blade. Use to adjust.
When the first adjustment screws 25a and 25b are turned and screwed into the first through screw holes 26a and 26b, the tip ends of the first adjustment screws 25a and 25b come into contact with the other movable plate, and when further turned, the upper movable plate 22a and the lower When the gap G of the movable plate 22b expands in the vertical direction so that the measuring unit 23 extends from the upper movable plate 22a, the movable plate 22b acts away from the blade surface of the blade, and when the measuring unit 23 extends from the lower movable plate 22b, the blade It works to get closer to the wing surface. In order to prevent the other movable plate from being worn by repeated contact with the adjustment screw, the other adjustment plate RM having high wear resistance is installed on the other movable plate where the tips of the first adjustment screws 25a and 25b come into contact. Good.
Further, when the second adjustment screw 27 is turned and screwed into the second screw hole 29 through the second burr hole 28, the second adjustment screw 27 enters the second screw hole 29 after passing through the second burr hole 28. The portion stops at the entrance of the second hole 28, and when further rotated, the gap G between the upper movable plate 22a and the lower movable plate 22b contracts in the vertical direction, and when the measuring unit 23 extends from the upper movable plate 22a, the blade blade When the measuring unit 23 extends from the lower movable plate 22b, it acts to move away from the blade surface of the blade. The second screw hole 29 communicating with the second fool hole 28 may be a screw hole that penetrates or a screw hole that does not penetrate, but when the screw hole that does not penetrate is used, the second adjustment screw 27 is inserted to the maximum extent. Even in such a case, it is preferable to have a depth that can be accommodated, and a threaded hole that penetrates in terms of ease of manufacturing is preferable. In addition, the second baffle hole 28 is a “burst hole” that is slightly larger than the diameter of the second adjustment screw 27, and the gap G is contracted by the second adjustment screw 27 and the second screw hole 29 by being a fool hole. be able to.
By combining the adjustment by the first adjustment screws 25a and 25b and the adjustment by the second adjustment screw 27, it is possible to trace the blade surface of the blade by bringing at least the entire line pq into contact with the blade surface of the blade. Become.

A propeller gauge 30 as a third embodiment of the propeller gauge according to the present invention will be described with reference to FIGS.
The propeller gauge 30 includes a shaft 31 into which a lower portion 31b can be inserted into a hollow portion of a propeller boss of the propeller, a flexible connecting portion (movable portion) 32 extending in a radial direction from the upper portion 31a of the shaft 31, and a diameter of the movable portion 32. When the direction is divided into the shaft side and the tip side, the measuring unit 33 that extends downward on the tip side and can contact with the blade surface of the blade of the propeller at least on the line pq, and the shaft side or the shaft where the movable unit 32 is immovable And a fixing portion 34 for fixing the shaft 31 so as not to rotate. The fixing portion 34 can be brought into contact with the blade surface of the blade at a root region BA of the blade extending from the propeller boss.
The distal end side of the movable portion 32 is branched into an upper movable piece 32a and a lower movable piece 32b with a gap G extending in the radial direction interposed therebetween. Preferably, as shown in FIG. 12, the upper movable piece is separated from the gap G by a radial cut introduced on the distal end side of the movable plate 32 whose thickness direction is arranged in the circumferential direction and the plate surface extends in the vertical direction. You may branch to 32a and the lower movable piece 32b.
The measurement unit 33 extends downward from one of the upper movable piece 32a and the lower movable piece 32b, and preferably has a reduced thickness at a portion that is in contact with the blade surface of the blade at least on the line pq. Yes. When the gap G is contracted or expanded with an adjustment screw provided on at least one of the upper movable piece 32a and the lower movable piece 32b, the measuring unit 33 can be moved in the vertical direction, and at least the entire line pq is moved to the blade. The blade surface of the blade can be traced in contact with the blade surface.

As shown in FIG. 13, one of the upper movable piece 32a and the lower movable piece 32b has a gap G in the first through screw holes 36a and 36b and the first through screw holes 36a and 36b. The first adjustment screws 35a and 35b are inserted into the first through screw holes 36a and 36b, and one of the upper movable piece 32a and the lower movable piece 32b has a gap in the vertical direction. The second screw hole 39 is provided to the second screw hole 39 and the second screw hole 39 communicating with the second screw hole 38 is provided to the second screw hole 39. A second adjustment screw 37 that can be inserted is provided.
FIG. 13 shows a pair of second burr holes 38 corresponding to one second adjustment screw 37 in addition to the two first adjustment screws 35a-b and the two first through screw holes 36a-b corresponding thereto. The number of the first adjustment screw and the second adjustment screw can be selected according to the shape of the blade surface of the blade and the accuracy of storing the shape. Since many propeller gauges are used to memorize the blade surface on many points, each propeller gauge preferably corresponds to at least one first adjustment screw and at least one second adjustment screw. It suffices to have at least one first through screw hole and at least one set of second fool hole and second screw hole.

The propeller gauge 30 is installed on the propeller 100 and the lower surface of the fixed portion 34 is brought into contact with the blade surface of the blade 101. After the lower part of the fixed part 34 is brought into contact with the blade surface of the blade 101, the lower part of the measuring unit 33 is brought into contact with the blade surface of the blade 101, and the adjustment screw so that the whole line pq contacts the blade surface of the blade 101. Use to adjust.
When the first adjustment screw 35a is turned and screwed into the first through screw hole 36a, it stops when the tip of the first adjustment screw 35a comes into contact with the other movable piece, and when further turned, the gap G between the upper movable piece 32a and the lower movable piece 32b. Expands in the vertical direction and acts so that the measurement unit 33 approaches the blade surface of the blade. In order to prevent the other movable plate from being worn by repeated contact with the adjustment screw, the other movable plate with which the tip of the first adjustment screw 35a contacts is preferably provided with a reinforcing material RM having high wear resistance. .
Further, when the second adjustment screw 37 is turned and screwed into the second screw hole 39 through the second burr hole 38, the second adjustment screw 37 enters the second screw hole 39 after passing through the second burr hole 38. The part stops at the entrance of the second flaw hole 38, and when further rotated, the gap G between the upper movable piece 32a and the lower movable piece 32b contracts in the vertical direction so that the measuring part 33 acts away from the blade surface of the blade. The second screw hole 39 communicating with the second fool hole 38 may be a screw hole that penetrates or may not penetrate, but when the screw hole that does not penetrate is used, the second adjustment screw 37 is inserted to the maximum extent. Even in such a case, it is preferable to have a depth that can be accommodated, and a threaded hole that penetrates in terms of ease of manufacturing is preferable. In addition, the second burr hole 38 is a “burst hole” that is slightly larger than the diameter of the second adjustment screw 37, and the gap G is contracted by the second adjustment screw 37 and the second screw hole 39 by being a fool hole. be able to.
By combining the adjustment using the first adjustment screws 35a and 35b and the adjustment using the second adjustment screw 37, at least the entire line pq can be brought into contact with the blade surface of the blade and the blade surface of the blade can be traced.

A propeller gauge 40 which is a fourth embodiment of the propeller gauge according to the present invention will be described with reference to FIG.
The propeller gauge 40 includes a shaft 41 into which the lower portion 41b can be inserted into the hollow portion of the propeller boss of the propeller, a flexible connecting portion (movable portion) 42 extending in the radial direction from the upper portion 41a of the shaft 41, and the diameter of the movable portion 42. When the direction is divided into the shaft side and the tip side, the measuring part 43 that extends downward on the tip side and can contact the blade surface of the blade of the propeller at least by the line pq, and the shaft side or the shaft where the movable part 42 is immovable And a fixing portion 44 for fixing the shaft 41 so as not to rotate. The fixing portion 44 extends downward from the upper portion of the blade and can come into contact with the blade surface of the blade in the blade root area BA extending from the propeller boss.
The distal end side of the movable portion 42 is branched into a left movable piece 42a and a right movable piece 42b in the circumferential direction with a gap G extending in the radial direction interposed therebetween. Preferably, as shown in FIG. 14, the plate surface is arranged in the circumferential direction, and the gap G is separated in the circumferential direction by a radial cut introduced in the distal end side of the movable plate 42 whose thickness direction extends in the vertical direction. The left movable piece 42a and the right movable piece 42b may be branched. In this specification, for the sake of convenience, when viewing the rotation of the shaft from above the shaft, the clockwise direction is the clockwise direction (clockwise) and the counterclockwise direction is the left direction. Call it.
Measurement unit 43 extends from either the left movable piece 42a or right movable piece 42b downward, the angle theta ₂ between the blade surface of the blade, inclined 5-30 degrees left or right from the vertical angle ( 60 ° ≦ θ ₂ ≦ 85 ° or 95 ° ≦ θ ₂ ≦ 120 °), and contact with the blade surface of the blade, and preferably the thickness of the contacted portion so that contact can be made at least with the line pq The thickness is thinned. The angle theta ₂ between the blade surface of the part and the blade in contact with the blade surface of the blade of the measuring part, than to a larger or smaller angular range of 5 to 30 degrees from vertical, left movable piece 42a and right movable When the gap G is contracted or expanded with an adjusting screw provided on at least one of the pieces 42b, the measuring section 43 can be moved in the circumferential direction (left-right direction), and at least the entire line pq is at least the blade surface of the blade. The blade surface of the blade can be traced by contacting the blade. In order to the angle theta ₂ with larger or smaller angular range of 5 to 30 degrees from the vertical, it may be changed in the vertical direction and the vertical direction of the angle theta ₁ of the shaft of the connecting portion.

As shown in FIG. 14, one of the left movable piece 42 a and the right movable piece 42 b is inserted into the first through screw hole 46 toward the gap G in the left-right direction and into the first through screw hole 46 toward the gap G. The first adjusting screw 45 is provided, and either the left movable piece 42a or the right movable piece 42b is located at a position different from the first through screw hole 46 in the radial direction. 48, and the other includes a second screw hole 49 that communicates with the second burr hole 48, and a second adjustment screw 47 that is inserted from the second burr hole 48 toward the gap G and can be inserted into the second screw hole 49. Prepare.
FIG. 14 shows a pair of second burr holes 48 and second screws corresponding to one second adjustment screw 47 in addition to one first adjustment screw 45 and one corresponding first through screw hole 46. Although the hole 49 is shown, the number of the first adjustment screw and the second adjustment screw can be selected according to the shape of the blade surface of the blade and the accuracy of storing the shape. Since many propeller gauges are used to memorize the blade surface on many points, each propeller gauge preferably corresponds to at least one first adjustment screw and at least one second adjustment screw. It suffices to have at least one first through screw hole and at least one set of second fool hole and second screw hole.

The propeller gauge 40 is installed on the propeller 100 and the lower surface of the fixed portion 44 is brought into contact with the blade surface of the blade 101. After the lower part of the fixed part 44 is brought into contact with the blade surface of the blade 101, the lower part of the measuring unit 43 is brought into contact with the blade surface of the blade 101, and the adjustment screw is brought into contact with the blade surface of the blade. Use to adjust.
When the first adjustment screw 45 is turned and screwed into the first through screw hole 46, it stops when the tip of the first adjustment screw 45 comes into contact with the other movable piece, and when further turned, the gap G between the left movable piece 42a and the right movable piece 42b. Expands in the circumferential direction, and the measuring unit 43 acts to move the blade surface of the blade in the first circumferential direction. In order to prevent the other movable plate from being worn by repeated contact with the adjustment screw, the other movable plate with which the tip of the first adjustment screw 45a contacts is preferably provided with a reinforcing material RM having high wear resistance. .
Further, when the second adjustment screw 47 is turned and screwed into the second screw hole 49 through the second burr hole 48, the second adjustment screw 47 enters the second screw hole 49 after passing through the second burr hole 48. The part stops at the entrance of the second hole 48, and when further rotated, the gap G between the left movable piece 42a and the right movable piece 42b contracts in the circumferential direction, and the measuring unit 43 causes the blade surface of the blade to be opposite to the first circumferential direction. It acts to move in the second circumferential direction. The second screw hole 49 communicating with the second fool hole 48 may be a screw hole that penetrates or a screw hole that does not penetrate, but when the screw hole that does not penetrate is used, the second adjustment screw 47 is inserted to the maximum extent. Even in such a case, it is preferable to have a depth that can be accommodated, and a threaded hole that penetrates in terms of ease of manufacturing is preferable. In addition, the second baffle hole 48 is a “burst hole” that is slightly larger than the diameter of the second adjustment screw 47, and the gap G is contracted by the second adjustment screw 47 and the second screw hole 49 by being a fool hole. be able to.
By combining the adjustment by the first adjustment screw 45 and the adjustment by the second adjustment screw 47, it is possible to trace the blade surface of the blade by bringing the blade surface of the blade into contact with at least the entire line pq.

Up to this point, four exemplary embodiments have been described with reference to the drawings. However, the present invention is not limited to these four exemplary embodiments, and includes many exemplary embodiments and modifications within the same technical idea. In the drawings showing the four form examples, the reference numerals in the drawings are attached so as to have the same or similar functions as long as the ones are the same. It is as follows when the code | symbol in the figure of four example forms is attached | subjected and the preferable aspect of the propeller gauge of the measurement position fixed type | mold of this invention is described.
Shafts 11, 21, 31, 41 into which the lower parts 11 b, 21 b, 31 b, 41 b can be inserted into the hollow part of the propeller labs 102 of the propeller 100,
A flexible movable part extending in the radial direction from the upper parts 11a, 21a, 31a, 41a of the shaft. When the radial direction of the movable part is divided into the shaft side and the tip side, it is immobile on the shaft side, The upper movable pieces 12a, 22a, 32a or the lower movable pieces 12b, 22b, 32b or the left movable piece 42a or the right movable piece 42b in the circumferential direction are branched across a gap extending in the radial direction, and at least one of the upper and lower movable pieces or the aforementioned By adjusting or expanding the gap interval with the adjusting screws 15a to 15c, 17a to b, 25a to b, 27, 35a to b, 37, 45, 47 provided on at least one of the left and right movable pieces, Flexible movable parts 12, 22, 32, 42 that can be moved in the direction;
At the front end side of the movable part, it extends downward from the upper movable piece or the lower movable piece, or from the right movable piece or the left movable piece, and at least the line p-q (where p and q are lines) Measuring units 13, 23, 33, 43 that can be contacted at both ends),
A fixed part 14, 24, 34 for fixing the rotatable shaft, which extends downward on the shaft side of the movable part or on the upper part of the shaft and can come into contact with the blade surface of the blade in the blade root area BA extending from the propeller boss. 44, and the measurement unit can trace the blade surface of the blade by bringing the blade surface of the blade into contact with at least the entire line pq by moving the tip side of the movable portion in the vertical direction or the horizontal direction. Propeller gauge with fixed position.

The movable part of the propeller gauge is made of a flexible material, not a rigid material. When adjusting the gap provided in the movable part with the adjustment screw in the vertical direction or the left-right direction (circumferential direction), the gap sandwiched between the flexible movable parts can be slightly expanded and contracted depending on the expansion and contraction. The measuring unit extending from either one of the movable pieces or the left and right movable pieces can also move slightly, and the measuring unit moves the blade surface of the propeller blade in the vertical direction or the horizontal direction (circumferential direction). Fine adjustment is possible.
The flexible material used for the movable part is, for example, plastic, and is preferably a highly transparent plastic in that the movement of the adjusting screw can be easily confirmed, and is a polymer of acrylate ester or methacrylate ester. Examples thereof include acrylic resins (particularly preferably polymethyl methacrylate (PMMA)), polycarbonate (PC), polyvinyl chloride (PVC), polyethylene terephthalate (PET), and the like. Preferably, ABS resin, PLA resin, etc. are also mentioned in that the shape of the movable part can be converted into data and the same shape can be made at any time by a 3D printer.
When plastic is used for the movable part, it is preferable that the shaft, the measurement part, and the measurement part are also plastic from the viewpoint of ease of processing and easy adhesion using an adhesive or the like. In particular, the measurement unit is preferably a highly transparent plastic like the movable unit in that the contact location of the blade surface of the blade can be easily confirmed, and the shape of the measurement unit is converted into data and the same shape is always made by a 3D printer. In addition, ABS resin, PLA resin, and the like can also be mentioned in that they can be used. When plastic is used for the measuring part, it can be cut by a file or the like.
When the propeller gauge shaft, movable part, fixed part and measuring part are all made of plastic, each part may be joined by bonding with an adhesive or by fusion by heating, but part or all of them are integrated. You may shape | mold.

  The propeller gauge may include two or more measuring units in the circumferential direction or the radial direction, but since the gap is shared, the shape of the blade surface to be measured is limited, and the adjustment screw is less dense. The propeller gauge tends to be large.

  The gap between the vertically movable pieces or the left and right movable pieces in the circumferential direction is not particularly limited as long as the gap can be adjusted by the adjusting screw. For example, when the length of the screw portion of the adjusting screw is 10 to 20 mm The gap is preferably 1 to 8 mm, and more preferably 2 to 5 mm.

The adjustment screw is not particularly limited as long as it can be screwed into screw holes such as the first through screw hole and the second screw hole. For example, the adjustment screw is made of metal except for a screw made entirely of metal and a plastic head. A certain screw or the like can be mentioned. From the viewpoint of good feeling when the head is rotated with a finger, the screw is preferably a screw whose head is made of plastic and other than the head. The head of the adjustment screw is a portion larger than the diameter of the screw portion, and is a portion that cannot be inserted into a screw hole such as a first through screw hole and a fool hole such as a second fool hole.
A reinforcing material RM is preferably disposed at the contact point of the upper and lower movable pieces or the left and right movable pieces that are in contact with the tip of the first adjustment screw penetrating one of the movable pieces of the vertical and left and right movable pieces. To do.
The reinforcing material RM for receiving the tip of the screw is not particularly limited, and may be a non-transparent material. For example, a plastic piece whose strength is increased by a filler, a plastic piece using a high-strength plastic, or stainless steel A metal piece such as the above may be used, and it may be bonded to the portion of the movable piece receiving the tip of the screw with an adhesive or the like.

The number of first adjustment screws and the number of first through screw holes that can contribute to the extension of the gap G and pass through one movable piece, preferably received by the other movable piece by the reinforcing material RM, are preferably at least Although it is one set, when the measurement unit contacts the blade surface of the propeller blade at the line pq, it affects the contact of the measurement unit near the p side and the contact of the measurement unit near the q side. More preferably, there are at least two sets for installation at a given location, or even more preferably at least three sets for installation at a location that affects the contact of the measurement part at the center of pq. However, since the time required for adjustment increases as the number increases, the number increases when the blade surface of the blade contacting the measuring part changes rapidly between p-q, and the number decreases when the change is gentle. You may let them. Instead of increasing the number, a part of the measuring unit can be cut with a file or the like.
A second adjustment screw that can contribute to shrinkage of the gap G and is inserted toward the gap from a second burr hole that penetrates one movable piece, and preferably can be inserted into a second screw hole that penetrates the other movable piece. The number, the number of the second hole, and the number of the second screw hole are preferably at least one set. However, when the measurement unit contacts the blade surface of the propeller blade at the line pq, it is in the vicinity of the p side. More preferably at least two sets, or even in the center of pq, to affect the contact of the measurement unit in the location that affects the contact of the measurement unit, the location that affects the contact of the measurement unit near the q side More preferably, there are at least three sets for installation at a given location. However, since the time required for adjustment increases as the number increases, the number increases when the blade surface of the blade contacting the measuring part changes rapidly between p-q, and the number decreases when the change is gentle. You may let them. Instead of increasing the number, a part of the measuring unit can be cut with a file or the like.
The second screw hole communicating with the second fool hole may be a through hole or a hole that does not penetrate, but when using a hole that does not penetrate, the depth that can be accommodated even when the second adjustment screw is inserted to the maximum extent. It is preferable that the through-hole is preferable in terms of manufacturing ease. The second hole is a “burr hole” that is slightly larger than the diameter of the second adjustment screw. By using the second hole, the gap G can be contracted between the second adjustment screw and the second screw hole. Since the diameter of the hole is larger than that of the screw, the screw hole is not required and is usually a hole without a screw.
At least one set of a first adjustment screw and a first through screw hole for extending the gap G interval, and at least one set of a second adjustment screw, a second burr hole and a second screw hole for shrinking the gap G interval. Of these, a propeller gauge having only one of them may be useful. For example, when the direction of propeller correction (how to beat a wooden mallet, etc.) is determined based on the result of a trial run or the like, only expansion or contraction may be used. A case where it is found that the rotation is increased by a trial run or the like can be exemplified.
However, normally, a propeller gauge having both at least one set for expansion and at least one set for contraction is preferable, and the accuracy increases as the number of sets increases, but the gauge itself may be crowded and difficult to operate. . In the first embodiment, more preferably, the propeller gauge includes both two sets for expansion and two sets for contraction, and more preferably, both at least two sets for expansion and at least two sets for contraction. Propeller gauge with In the second to fourth embodiments, more preferably, the propeller gauge includes both two sets for expansion and one set for contraction, and more preferably, at least two sets for expansion and at least one set for contraction. Propeller gauge with both. In the second to fourth embodiments, two sets for expansion are used to bring the measurement unit into contact with the blade surface near both ends of the line pq, and the measurement unit is provided on the blade surface at the center of the line pq. This is because it may be sufficient to use one set for contraction in order to bring them into contact with each other.

The first adjustment screw that penetrates one movable piece and is preferably received by the other movable piece by the reinforcing material RM is a gap depending on the degree of rotation of the adjustment screw immediately after its tip contacts the other movable piece. Can contribute to the extension of the interval. That is, immediately after the tip of the first adjustment screw comes into contact with the other movable piece, it is also possible to record and angle the rotation angle of the first adjustment screw. It becomes possible to leave a record by characterization, and it is possible to compare with the shape of the blade surface of the blade measured in the past, and information useful for optimizing the blade surface shape of the blade of the propeller can be obtained.
The second adjustment screw that can be inserted into the second screw hole that penetrates the other movable piece through the second burr hole that penetrates one movable piece and preferably penetrates the other movable piece has one head of the second adjustment screw. Immediately after contact with the movable piece, it is possible to contribute to contraction of the gap interval according to the degree of rotation of the second adjustment screw. That is, immediately after the head of the second adjustment screw comes into contact with one movable piece, the angle at which the second adjustment screw is rotated can be recorded and converted into text. By making it possible to record it by recording, it becomes possible to compare with the blade surface shape measured in the past, and information useful for optimizing the blade surface shape of the propeller blade can be obtained.
The rotation angle of the first and second adjustment screws can be read, for example, by marking the head of the adjustment screw with a pen or the like and moving the mark. Moreover, a scale may be attached around the head of the preparation screw, and the number of scales corresponding to the rotation may be recorded.

After storing the shape of the blade surface of the blade with a propeller gauge, get a feel to test run attached to competing run boat. If necessary, further after modifying the shape of the blade surface of the blade, and stores the measured shape of the blade surface of the blade, to test run attached to competing run boat. This process is repeated to obtain the optimum propeller blade surface shape, and at the same time, the shape is stored. If you get a good feel in the actual race, use the propeller gauge that remembered the shape of the wing surface even when a new propeller was supplied in the next race. Can be reproduced. The shape of the blade surface of the optimum propeller in combination with the competition run boat varies, the shape of the past optimum blade is not necessarily the ideal time, optimized test run attached to more competitive run boat However, since it is possible to start from the past optimum blade shape, the time required for the optimization can be greatly shortened.
To change the shape of the wing surface of the propeller, usually use a correction base equipped with a shaft and a pedestal, and place the propeller on the base by passing the hollow part of the propeller through the shaft, and between the propeller and the base, on the plate This can be achieved by sandwiching a leather or rubber covered sheet and striking with a mallet to change the desired shape of the plapeller.

1, 11, 21, 31, 41, 111 Shaft 11a, 21a, 31a, 41a, 111a Shaft upper part 11b, 21b, 31b, 41b, 111b Shaft lower part 2, 12, 22, 32, 42, 112 Movable part 10, 20, 30, 40, 110 Propeller gauges 12a, 22a, 32a Upper movable piece 12b, 22b, 32b Lower movable piece 12s, 22s Spacer 42a Left movable piece 42b Right movable piece 3, 13, 23, 33, 43 , 113 Measuring parts 4, 14, 24, 34, 44 Fixing parts 15a-c, 25a-b, 35a-b, 45 First adjusting screws 16a-c, 26a-b, 36a-b, 46 First through screw holes 17a-b, 27, 37, 47 Second adjusting screws 18a-b, 28, 38, 48 Second fool holes 19a-b, 29, 39, 49 Second screw holes 100 Propeller 101 blades 101a leading 101b trailing edge 102 propeller boss 103 shear pin receiving groove BA blade root area RM reinforcements

Claims (11)

A shaft that can insert the lower part into the hollow part of the propeller boss of the propeller,
A connecting portion extending in a radial direction from an upper portion of the shaft;
When the radial direction of the connecting portion is divided into the shaft side and the tip side, it extends downward on the tip side, and contacts with the blade surface of the blade of the propeller at least by lines pq (where p and q are both ends of the line) Possible measuring units,
A fixing part for fixing the rotatable shaft, which extends downward on the shaft side of the connecting part or on the upper part of the shaft, and can come into contact with a blade surface of the blade in a root region of the blade extending from the propeller boss. Propeller gauge with a fixed measurement position. The connecting portion is immovable on the shaft side, and is branched into a vertically movable piece or a left and right movable piece in a circumferential direction across a gap extending in the radial direction on the tip side, and at least one of the vertically movable piece or the left and right movable piece It is a flexible movable part that can be moved in the vertical direction or the horizontal direction by contracting or expanding the gap interval with an adjusting screw provided on at least one of the pieces,
The measurement unit extends downward from the upper or lower movable piece or from the right or left movable piece, and can contact the blade surface of the blade of the propeller at least on the line pq.
By moving the front end side of the movable part in the up-down direction or the left-right direction, the measurement unit can trace the blade surface of the blade by bringing the blade surface of the blade into contact with at least the entire line pq. Item 3. A fixed-position propeller gauge according to item 1. The upper movable piece and the lower movable piece are configured by overlapping the plate surface of the upper movable plate and the plate surface of the lower movable plate in the vertical direction with the gap interposed therebetween via a spacer arranged on the shaft side,
(I) A first through screw hole in which one of the upper movable plate and the lower movable plate is directed in the vertical direction toward the gap, and a first adjustment screw inserted into the first through screw hole toward the gap And / or (ii) one of the upper movable plate and the lower movable plate is vertically moved at different positions in the circumferential direction that may be the same or different from the first through screw hole. The second screw hole is provided with a second screw hole in the direction toward the gap, the other having a second screw hole communicating with the second bug hole, and further inserted from the second hole toward the gap. A second adjusting screw that can be inserted into the
The measurement unit is a measurement unit that extends downward in the circumferential direction from the upper movable plate or the lower movable plate, and is capable of contacting the blade surface of the blade at least at the line pq.
When the first adjustment screw is turned and screwed into the first through screw hole, the tip of the first adjustment screw stops when it comes into contact with the other movable plate, and when further turned, the gap between the upper movable plate and the lower movable plate is increased. When the measuring unit extends from the upper movable plate, it extends away from the blade surface of the blade, and when the measuring unit extends from the lower movable plate, it approaches the blade surface of the blade. Acts as
When the second adjusting screw is turned and screwed into the second screw hole through the second hole, the head of the second adjusting screw enters the second screw hole after passing through the second hole. When stopped further, the gap between the upper movable plate and the lower movable plate contracts in the vertical direction, and when the measuring part extends from the upper movable plate, The propeller gauge of the measurement position fixed type according to claim 2, which acts so as to approach, and acts so as to move away from the blade surface of the blade when the measurement unit extends from the lower movable plate. The upper movable piece and the lower movable piece are configured by overlapping the plate surface of the upper movable plate and the plate surface of the lower movable plate in the vertical direction with the gap interposed therebetween via a spacer arranged on the shaft side,
(I) A first through screw hole in which one of the upper movable plate and the lower movable plate is directed in the vertical direction toward the gap, and a first adjustment screw inserted into the first through screw hole toward the gap And / or (ii) one of the upper movable plate and the lower movable plate has a second burr hole in the vertical direction at a position different from the first through screw hole in the radial direction. And the other includes a second screw hole that communicates with the second hole, and a second adjustment screw that is inserted from the second hole toward the gap and can be inserted into the second hole.
The measurement unit is a measurement unit that extends downward in the radial direction from the upper movable plate or the lower movable plate, and is capable of contacting the blade surface of the blade at least at the line pq.
When the first adjustment screw is turned and screwed into the first through screw hole, the tip of the first adjustment screw stops when it comes into contact with the other movable plate, and when further turned, the gap between the upper movable plate and the lower movable plate is increased. When the measuring unit extends from the upper movable plate, it extends away from the blade surface of the blade, and when the measuring unit extends from the lower movable plate, it approaches the blade surface of the blade. Acts as
When the second adjusting screw is turned and screwed into the second screw hole through the second hole, the head of the second adjusting screw enters the second screw hole after passing through the second hole. When stopped further, the gap between the upper movable plate and the lower movable plate contracts in the vertical direction, and when the measuring part extends from the upper movable plate, The propeller gauge of the measurement position fixed type according to claim 2, which acts so as to approach, and acts so as to move away from the blade surface of the blade when the measurement unit extends from the lower movable plate. The upper movable piece and the lower movable piece are separated from each other by the radial notches introduced on the distal end side of the movable plate whose thickness direction is arranged in the circumferential direction and the plate surface extends in the vertical direction. Divided into
(I) One of the upper movable piece and the lower movable piece includes a first through screw hole in the vertical direction, and a first adjustment screw inserted into the first through screw hole toward the gap, and / Or (ii) One of the upper movable piece and the lower movable piece is provided with a second blower hole in the vertical direction at a position different from the first through screw hole in the radial direction, and the other is the second blower hole. A second screw hole that communicates with the second screw hole, and further includes a second adjustment screw that is inserted from the second hole hole toward the gap and can be inserted into the second screw hole;
The measuring unit extends downward from the lower movable piece in the radial direction, and is a measuring unit that can contact with the blade surface of the blade at least at the line pq.
When the first adjustment screw is turned and screwed into the first through screw hole, the tip of the first adjustment screw stops when it comes into contact with the other movable piece, and when further turned, the gap between the upper movable piece and the lower movable piece is increased. When the second adjustment screw is turned into the second screw hole through the second burr hole, the second burr hole is expanded by vertically extending and acting so that the measurement unit approaches the blade surface of the blade. After passing through the second screw hole, the head of the second adjustment screw stops at the entrance of the second burr hole, and when further turned, the gap between the upper movable piece and the lower movable piece contracts vertically. The measuring position fixed type propeller gauge according to claim 2, wherein the measuring unit acts so as to move away from the blade surface of the blade. The movable portion is divided into the left movable piece and the right movable piece with a gap in the circumferential direction by a radial cut introduced on the distal end side of the movable plate having a plate surface arranged in the circumferential direction,
(I) One of the left movable piece and the right movable piece includes a first through screw hole in the left-right direction, and a first adjustment screw inserted into the first through screw hole toward the gap, and / Or (ii) One of the left movable piece and the right movable piece has a second burr hole in the left-right direction at a position different from the first through screw hole in the radial direction, and the other is the second burr hole. A second screw hole that communicates with the second screw hole, and further includes a second adjustment screw that is inserted from the second hole hole toward the gap and can be inserted into the second screw hole;
The measurement part extends downward from either the left movable piece or the right movable piece in the radial direction, and the angle formed with the blade surface of the blade is larger or smaller in the range of 5 to 30 degrees from the vertical. A measuring unit capable of contacting at least the line pq with the blade surface of the blade;
When the first adjusting screw is turned and screwed into the first through screw hole, it stops when the tip of the first adjusting screw comes into contact with the other movable piece, and when further turned, the gap between the left movable piece and the right movable piece is increased. Expanding in the circumferential direction, the measuring unit acts so as to move the blade surface of the blade in the first circumferential direction, and when the second adjustment screw is turned and screwed into the second screw hole through the second burr hole, Then, after passing through the second hole, it enters the second screw hole, the head of the second adjustment screw stops at the entrance of the second hole, and when further turned, the left movable piece and the right movable piece The fixed position type propeller gauge according to claim 2, wherein the gap contracts in the circumferential direction and the measurement unit acts so as to move the blade surface of the blade in a second circumferential direction opposite to the first circumferential direction. .   There are at least two sets of the first through screw hole and the first adjustment screw at positions where the distance from the shaft may be different or the same in the circumferential direction of the movable portion, and the second burr hole and the second The propeller gauge of the measurement position fixed type according to claim 3, wherein there are at least two pairs of screw holes and the second adjustment screw.   At least two sets of the first through screw hole and the first adjustment screw are present at positions where the distance from the shaft is different in the radial direction of the movable portion, and the second burr hole, the second screw hole, and the first screw The measurement position fixed type propeller gauge according to any one of claims 4 to 6, wherein at least one set of two adjusting screws is present. The fixed position type propeller gauge according to any one of claims 3 to 8, wherein the vertical direction of the connecting portion or the movable portion is inclined in correspondence with the pitch angle of the propeller from the vertical direction of the shaft. . Tip of the first adjustment screw is in contact, either Claim 3-9 to place a reinforcing material to the contact portion of the upper movable piece or the lower movable piece or the left movable piece or the right movable piece formed and the other Propeller gauge with fixed measuring position as described in Crab. The propeller gauge of a fixed measurement position type according to claim 1 or 2 , wherein a vertical direction of the connecting portion or the movable portion is inclined in correspondence with a pitch angle of the propeller from a vertical direction of the shaft.

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