JP2017207102A - Arm member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arm for an underwater camera free from corrosion even when it is used for a long time in sea water.SOLUTION: An arm 10 for an underwater camera includes an inner pole body 30 composed of a cylindrical member made of carbon fiber-reinforced plastic, and a second ball joint member 50 made of light-weight aluminum alloy, connected to one end portion 31 of the inner pole body 30. The second ball joint member 50 is composed of a cap portion 60 composed of a cylindrical portion 61 and a disc portion 62, and a spherical joint portion 70. An uneven portion 64 formed by arranging a plurality of projecting portions 63 at prescribed intervals in an axial direction, is disposed at a cylindrical portion inner peripheral side of the cap portion 60, a first spacer member 80 and a second spacer member 90 are disposed between the inner pole body 30 and the cap portion 60, and an adhesive material 100 is charged between an outer peripheral face of the inner pole body 30 and the cylindrical portion 61 of the cap portion 60 and between the first spacer member 80 and the second spacer member 90.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an arm member including a pole body made of carbon fiber reinforced plastic and a metal cylindrical member attached to an end of the pole body.

  A ball member including a pole body made of carbon fiber reinforced plastic and a metal cylindrical member attached to the pole body is used for an underwater camera arm. The underwater camera arm is used in the underwater camera body to hold the external illumination device at a position away from the underwater camera body. Some underwater camera arms of this type have a structure in which metal joint members are arranged at both ends or one end of a cylindrical pole body. Some underwater camera arms have a telescopic mechanism in the pole body. In order to realize such an expansion / contraction mechanism, a cylindrical member having a male thread formed on the outer periphery is joined to a pole body made of carbon fiber reinforced plastic. Such an underwater camera arm is required to be light and have high strength because of the demand in use. Moreover, since the arm for underwater cameras is used in the sea, the corrosion resistance with respect to seawater is also calculated | required.

  In general, many underwater camera arms are made of a lightweight aluminum alloy. In recent years, in order to further reduce the weight, it has been proposed that the pole body of the underwater camera arm be made of carbon fiber reinforced plastic.

  However, even when the pole body is formed of carbon fiber reinforced plastic, the ball joint is formed of a lightweight aluminum alloy in order to improve its moldability and wear resistance. As described above, it is known that when an article in which different kinds of materials are joined is placed in seawater, a potential difference is generated due to a difference in ionization tendency of the different kinds of materials, so that electrolytic corrosion is likely to occur.

  The arm for underwater cameras equipped with the above-mentioned carbon fiber reinforced plastic pole body, when the pole body and the ball joint part are subjected to conventional anti-corrosion measures, screw the ball joint into the pole body and join it into the sea. Electric field erosion occurs. That is, an aluminum underwater camera housing to which a light aluminum alloy ball joint or an underwater camera arm is attached is subjected to electric field corrosion. This is because, as described above, when a member made of a material having a different ionization tendency comes into contact or approaches, and moisture intervenes therebetween, the material having a high ionization tendency is oxidized and corrosion occurs.

  Aluminum has a large ionization tendency, and carbon fibers have a smaller ionization tendency than aluminum. In water, an aluminum having a high ionization tendency serves as an anode, and a carbon fiber having a low ionization tendency serves as a cathode to generate an electric current. For this reason, the aluminum atoms that have become the anode emit electrons and oxidize (electrolytic corrosion).

  In seawater with a high chloride ion concentration, the electrical conductivity is higher than that of fresh water and further increases the corrosion rate. Aluminum used in the sea is usually anodized so that its surface is covered with an anodized film in order to improve corrosion resistance. However, in the sea with high electrical conductivity, even if alumite treatment is performed, fine cracks enter the alumite film due to fine threading and aging, etc., and seawater permeates through the cracks and energizes.

  Also, the pole body made of carbon fiber reinforced plastic is knitted with carbon fiber to be energized in the epoxy resin as a base material, and is not energized when used on land. However, in the sea, like the anodized surface of the aluminum member, fine cracks enter into the epoxy resin due to fine threading and aging, etc., and the seawater penetrates from the cracks and is energized. Further, the carbon fiber may be exposed on the cut surface of the pole body, and energization occurs.

  Usually, underwater camera systems use aluminum in the sea by incorporating stainless steel and brass screws and parts with different ionization tendency. However, since the stainless steel screws and brass parts to be incorporated are smaller than the carbon arm, the experience so far has shown that there is no problem with just anodizing.

  However, according to the inventor's test, an aluminum member incorporated in contact with or in close proximity to a carbon fiber reinforced plastic with a few steps of ionization is so intense that it melts when placed in the sea for a long period of one month. Electrolytic corrosion was observed. In another one month long cycle underwater installation test, similar erosion was observed in aluminum clamps used in underwater camera systems with carbon arms connected.

  An underwater camera arm equipped with a carbon fiber reinforced plastic pole body and a lightweight aluminum alloy ball joint requires not only the conventional anodized treatment but also insulation measures, considering long-term underwater use. There is.

In order to prevent electric field corrosion in seawater as described above, Patent Document 1 discloses a joint made by joining a metal material and a carbon fiber reinforced plastic (CFRP) laminated material. Disclosed is a dissimilar joint characterized in that it comprises an intermediate material that is intermediate in surface and has intermediate mechanical properties of quantitative materials and low electrical conductivity.
Japanese Utility Model Publication 3-69708

However, as described in Patent Document 1, simply connecting a lightweight aluminum alloy ball joint to the cylindrical pole body via an adhesive causes energization in the following cases, so that corrosion is effectively prevented. There is a problem that you can not.
(1) The cut surface of the carbon fiber reinforced plastic pole body comes into contact with seawater.
(2) The ball joint and the carbon fiber constituting the pole body are in direct contact.
(3) Bubbles are mixed in the layer of adhesive joining the ball joint and the pole body, cracks are generated, and seawater penetrates.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an underwater camera arm that does not corrode even when used in seawater for a long period of time.

The invention according to claim 1, which solves the above problem, is an arm member comprising a cylindrical pole member formed of carbon fiber reinforced plastic, and a metallic cylindrical member joined to one end of the pole member. The cylindrical member covers an outer peripheral surface of the one end portion of the pole member, and has a plurality of protruding portions protruding inward in a cross-sectional shape along the axis on the inner peripheral side by a predetermined dimension in the axial direction. Are provided with uneven portions formed at a predetermined interval, contacting the end surface of the one end portion of the pole member, and separating the outer peripheral surface of the one end portion side of the pole member from the inner peripheral surface of the cylindrical member. A first spacer member; and a second spacer member that separates the outer peripheral surface of the pole member and the inner peripheral surface of the other end of the cylindrical portion, the outer peripheral surface of the pole member and the cylindrical member Between Said pawl member and said tubular member and the adhesive for fixing while insulating the a space formed between the spacer member and the second spacer member, characterized in that filled.
According to invention of Claim 1, the pole main body and the cylindrical member are insulated by the 1st spacer member, the 2nd spacer member, and the adhesive material. For this reason, the situation where the cut surface of the pole body of carbon fiber reinforced plastic touches seawater or the cylindrical member and the carbon fiber constituting the pole body directly contact can be prevented. Further, the pole body is a simple cylindrical member and is not otherwise processed. For this reason, carbon fiber is not exposed on the surface. Moreover, the edge part cut surface of a pole main body is contacting the 1st spacer member, and carbon fiber does not contact another member. For this reason, electrolytic corrosion is prevented.

Similarly, in the invention according to claim 2, the cylindrical member includes a joint member to which another member can be connected, and the joint member is a circle that covers end surfaces of the cylindrical member and the one end portion of the pole member. It is characterized by comprising a cap part comprising a plate part and a joint part formed adjacent to the cap part and connectable to other members.
According to invention of Claim 2, another member can be joined to a joint part, and an arm member can be used as an arm for underwater cameras.

Similarly, the invention described in claim 3 is characterized in that the joint member is provided with a water guide hole portion communicating from the joint portion to the inside of the pole body.
According to the present invention, water flows into the pole body from the water guide hole. For this reason, fresh water for cleaning can be discharged from the inside of the pole body during maintenance, and water can enter the pole body when it is used in the water and buoyancy does not occur, so that the arm member can be used for an underwater camera arm. .

Similarly, the invention according to claim 4 is characterized in that the joint portion is spherical.
ADVANTAGE OF THE INVENTION According to this invention, the arm for underwater cameras which can attach accessories, such as an underwater flash, to a spherical joint part by rotation and angle change is realizable.

Similarly, the invention described in claim 5 is characterized in that the joint portion includes a flat plate member having a communication hole portion.
ADVANTAGE OF THE INVENTION According to this invention, the arm for underwater cameras which can attach accessories, such as an underwater flash, to a plate-shaped joint part in which the communicating hole part was formed can be rotated and angle-variable is realizable.

Similarly, in the invention described in claim 6, the joint member includes a plurality of plate-like members that are erected so as to be parallel to the cap portion, and the plate-like member has an interval between the plate-like members. According to the present invention, a through-hole portion into which a screw member for changing the shape can be inserted is formed. An underwater camera arm that can be equipped with accessories can be realized.

Similarly, the invention described in claim 7 is characterized in that a male screw part is formed on the outer periphery of the cylindrical member, and the cylindrical body formed with the female screw part is configured to be screwed.
According to the present invention, another member can be screwed onto the outer periphery of the cylindrical member.

Similarly, the invention described in claim 8 is characterized in that the protruding portion formed on the inner surface of the cylindrical portion of the cap portion is formed in a spiral shape.
According to the present invention, since the protruding portion constituting the concavo-convex portion is spiral, the adhesive easily flows along the spiral concavo-convex portion.

  According to the arm member of the present invention, corrosion does not occur even when used for a long time in seawater.

  That is, according to the first aspect of the present invention, since the pole body and the cylindrical member are insulated by the first spacer member, the second spacer member and the adhesive, the carbon fiber reinforced plastic pole body is cut. It is possible to prevent the surface from touching seawater or the cylindrical member and the carbon fiber constituting the pole body from coming into direct contact. Moreover, since the uneven | corrugated | grooved part is formed inside the cap member, an adhesive material joins a cylindrical member favorably. Further, the pole body itself is a simple cylindrical member and is not otherwise processed, so that the carbon fiber is not exposed on the surface. Further, the end cut surface of the pole body is in contact with the first spacer member, and the carbon fiber does not contact other members, so that electrolytic corrosion is prevented.

  According to the second aspect of the present invention, another member can be joined to the joint portion, and the arm member can be used as an underwater camera arm.

According to the invention of claim 3, water flows into the pole body from the water guide hole. For this reason, fresh water for cleaning can be discharged from the inside of the pole body during maintenance, and water can enter the pole body when it is used in the water and buoyancy does not occur, so that the arm member can be used for an underwater camera arm. .

  Moreover, according to the invention of Claims 4 to 6, accessories such as an underwater flash can be attached to the joint part so as to rotate and change the angle.

  Furthermore, according to the invention described in claim 7, another member can be screwed onto the outer periphery of the cylindrical member.

  According to the eighth aspect of the present invention, since the projecting portion constituting the concavo-convex portion is formed in a spiral shape, the adhesive can easily flow along the spiral concavo-convex portion.

It is a perspective view which shows the arm for underwater cameras which concerns on 1st Embodiment of this invention. It is sectional drawing equivalent to the AA line in FIG. 1 of the arm for underwater cameras. It is an expanded sectional view showing an important section of the underwater camera arm. FIG. 2 shows an underwater camera arm according to a second embodiment of the present invention, in which (a) is a longitudinal sectional view of a joint portion, and (b) is a sectional view corresponding to the II line in (a). FIG. 3 shows an underwater camera arm according to a third embodiment of the present invention, in which (a) is a longitudinal sectional view of a joint portion, and (b) is a sectional view corresponding to II-II line in (a). . It is sectional drawing which shows the arm member which concerns on 4th Embodiment of this invention.

  The arm member which concerns on the form for implementing this invention is demonstrated.

<First Embodiment>
Hereinafter, an arm for an underwater camera will be described as a first embodiment of an arm member according to the present invention. FIG. 1 is a perspective view showing an underwater camera arm according to an embodiment of the present invention.

  The underwater camera arm 10 according to the present embodiment has a structure that can be expanded and contracted by combining the arm members according to the present invention. In other words, the underwater camera arm 10 includes an outer pole body 20 that is a pole body and an inner pole body 30 that is also a pole body. A first ball joint member 40 that is a joint member including a cylindrical member is connected to the outer pole main body 20, and a second ball joint member 50 that is a joint member is connected to the inner pole main body 30. The first ball joint member 40 and the second ball joint member 50 are used for connection with other members. The underwater camera arm 10 is in a contracted state (indicated by a solid line in FIG. 1) in which the outer pole body 20 is housed in the outer pole body 20, and in an expanded state (in the same virtual state) in which the inner pole body 30 is pulled out from the outer pole body 20. Can be set to this intermediate position).

  The outer pole body 20 includes a grip 21 and a knob portion 22. The inner pole body 30 can be moved relative to the outer pole body 20 by rotating the knob portion 22 in the release direction while holding the grip 21. Similarly, the inner pole body 30 can be set to be fixed to the outer pole body 20 by rotating the knob portion 22 in the locking direction. These telescopic mechanisms and release / lock mechanisms are well known. The outer pole body 20 and the inner pole body 30 are made of carbon fiber reinforced plastic. The first ball joint member 40 and the second ball joint member 50 are made of metal, for example, a lightweight aluminum alloy.

  The outer pole body 20 and the first ball joint member 40, and the inner pole body 30 and the second ball joint member 50 are joined with an adhesive, and their basic structures are the same. The structure of the ball joint member 50 will be described. 2 is a cross-sectional view showing the main part of the underwater camera arm, and FIG. 3 is an enlarged cross-sectional view showing the main part of the underwater camera arm.

  The inner pole body 30 is a pole member formed in a cylindrical shape made of carbon fiber reinforced plastic having a predetermined outer diameter D, and the second ball joint member 50 is attached to one end portion (upper end portion in the figure) 31 with the adhesive 100. It is fixed by. The cut surface appears as it is on the end face of one end of the inner pole body 30.

  The second ball joint member 50 includes a cap part 60 and a spherical joint part 70 provided adjacent to the cap part 60. The cap portion 60 includes a cylindrical portion 61 that forms a cylindrical member that covers the outer peripheral surface of the one end portion 31 of the inner pole body 30, and a disc portion 62 that covers the end surface of the one end portion of the inner pole body 30. The spherical joint portion 70 includes a spherical portion 71 and a neck portion 72 that connects the spherical portion 71 to the cap portion 60. The spherical portion 71 is provided with a groove portion 74 into which the rubber ring 73 is fitted, and a water introduction hole portion 75 communicating with the inner pole body 30 and a female screw portion 76 formed on the inner surface of the water introduction hole portion 75. A male screw portion of another member can be screwed into and connected to the female screw portion 76.

  As shown in FIG. 3, in the cap portion 60, the cylindrical portion 61 is formed with a plurality of protruding portions 63 that protrude inward in the cross-sectional shape along the axis O by a predetermined dimension d. The protrusions 63 are formed at a predetermined interval in the axial direction, and these form an uneven part 64. The inner diameter D2 of the concavo-convex portion 64 is larger than the outer diameter D of the inner pole body 30 described above by a dimension 2d or more (D1 + 2d> D), and the tip of the protruding portion 63 is in a state where the cap portion 60 is fixed to the inner pole body 30. It does not contact the inner pole body 30. For this reason, in a state where the adhesive material 100 is filled, the adhesive material 100 is interposed between the protruding portion 63 and the outer peripheral surface of the inner pole body 30 to insulate them. In this example, the projecting portion 63 has a substantially rectangular cross-sectional shape, and the concavo-convex portion 64 has a helical female screw shape on the inner peripheral surface of the tubular portion 61.

  In the present embodiment, the first spacer member 80 and the second spacer member 90 are disposed between the inner pole body 30 and the cap portion 60 of the second ball joint member 50.

  The first spacer member 80 includes an annular spacer portion 81 and a short cylindrical spacer portion 82 that extends downward from the outer periphery of the annular spacer portion 81 in the drawing, and forms an annular member having an L-shaped cross section. . The annular spacer portion 81 is disposed between the end surface of the one end portion 31 of the inner pole body 30 and the disc portion 62 of the cap portion 60. The short cylindrical spacer portion 82 is disposed between the outer peripheral surface on the one end portion 31 side of the inner pole body 30 and the inner peripheral surface of the cylindrical portion 61. The first spacer member 80 is an insulator and is made of, for example, a synthetic resin. The annular spacer portion 81 of the first spacer member 80 covers the end surface 31a of the one end portion 31 of the inner pole body 30, and contacts the cap portion 60 of the second ball joint member 50 and the carbon fiber exposed to seawater on the end surface 31a. To prevent. In addition, the short cylindrical spacer portion 82 of the first spacer member 80 separates the outer peripheral surface of the inner pole body 30 from the inner peripheral surface of the cylindrical portion 61 of the cap portion 60, thereby preventing contact between the two. To do.

  The second spacer member 90 is an annular member having an L-shaped cross section comprising a short cylindrical spacer portion 91 and a flange portion 92 extending outward from a lower end portion of the short cylindrical spacer portion 91. It is. The second spacer member 90 is made of synthetic resin. The short cylindrical spacer portion 91 is disposed between the outer peripheral surface of the inner pole main body 30 and the inner peripheral surface of the antispherical joint side end portion (lower portion in the drawing) of the cylindrical portion 61 of the cap portion 60. The flange portion 92 protrudes outward from the short cylindrical spacer portion 91 and contacts the lower end portion of the cylindrical portion 61. The short cylindrical spacer portion 91 of the second spacer member 90 separates the outer peripheral surface of the inner pole body 30 from the inner peripheral surface of the cylindrical portion 61 of the cap portion 60 to prevent contact and insulate between the two. To do. Further, the second spacer member 90 prevents the adhesive material 100 from protruding from the cap portion 60.

  In this embodiment, the space between the outer peripheral surface of the inner pole body 30 and the cylindrical portion 61 of the cap portion 60 and between the first spacer member 80 and the second spacer member 90 is An adhesive 100 that insulates and fixes the inner pole body 30 and the cap portion 60 is filled. The adhesive 100 secures the inner pole body 30 and the second ball joint member 50 and insulates the inner pole body 30 and the second ball joint member 50 from each other.

  Next, a procedure for joining the inner pole body 30 and the second ball joint member 50 will be described. In order to join the second ball joint member 50 to the inner pole body 30, first, the first spacer member 80 is fitted into the cap portion 60. At this time, the annular spacer portion 81 is in close contact with the inner surface of the disc portion 62, and the short cylindrical spacer portion 82 is in close contact with the inner surface of the cylindrical portion 61. Next, an adhesive 100, for example, an epoxy resin adhesive is applied to the concavo-convex part 64 of the cap part 60. At this time, the adhesive material 100 is prevented from dripping by the protruding portion 63 of the uneven portion 64. The adhesive 100 can be applied to the inner pole body 30 side.

  Next, the one end portion 31 of the inner pole body 30 is inserted into the cylindrical portion 61 of the cap portion 60, and is pushed in until the end surface 31 a of the one end portion 31 comes into contact with the annular spacer portion 81 of the first spacer member 80. At this time, the adhesive 100 applied to the concavo-convex portion 64 flows along the spiral concavo-convex portion 64 and is pressed on the outer periphery of the protruding portion 63 and the inner pole body 30.

  Further, the second spacer member 90 is fitted from the lower end of the inner pole body 30 in the figure, and the short cylindrical spacer portion 91 of the second spacer member 90 is interposed between the cylindrical portion 61 of the cap portion 60 and the inner pole body 30. And the flange portion 92 is brought into contact with the end portion of the cap portion 60. As a result, the short cylindrical spacer portion 91 of the second spacer member 90 pushes in the adhesive 100, and is between the outer peripheral surface of the inner pole body 30 and the cylindrical portion 61 of the cap portion 60, and the first spacer member 80. And the second spacer member 90 are filled with the adhesive 100. Waiting for the adhesive 100 to harden, the joining of the inner pole body 30 and the second ball joint member 50 is completed. The outer pole body 20 and the first ball joint member 40 are joined in the same manner.

  As described above, in the present embodiment, the inner pole body 30 and the cap portion 60 of the second ball joint member 50 are insulated by the first spacer member 80, the second spacer member 90, and the adhesive material 100. It is possible to prevent the cut surface of the inner pole body 30 made of carbon fiber reinforced plastic from directly contacting the cap portion 60 of the second ball joint member 50. In addition, since the concave and convex portion 64 is formed inside the second ball joint member 50, the adhesive 100 is favorably bonded to the second ball joint member 50, and the adhesive 100 is uneven when bonded by the adhesive 100. It is pushed by the part 64 and flows. Moreover, the cut surface of the edge part of the inner side pole main body 30 is contacting the annular spacer part 81 of the 1st spacer member 80, and a carbon fiber does not contact another member, and electrolytic corrosion is prevented.

  In this embodiment, since the uneven portion 64 is spiral, the adhesive 100 can easily flow along the spiral uneven portion 64.

  Further, according to the present embodiment, since water flows into the pole body from the hole portion, fresh water for cleaning can be discharged from the inside of the pole body at the time of maintenance, and water can be supplied to the pole body during use in water. Does not generate buoyancy in the underwater camera arm. And according to the arm 10 for underwater cameras which concerns on this embodiment, accessories, such as an underwater flash, can be attached to the spherical joint part 70 so that rotation and angle change are possible.

Second Embodiment
Next, a second embodiment of the present invention will be described. In addition to the one using the ball joint, the attachment mechanism for the accessory attached to the arm for the underwater camera has various configurations. 2nd Embodiment respond | corresponds to attachment other than such a ball joint.

  4A and 4B show an underwater camera arm according to a second embodiment of the present invention. FIG. 4A is a longitudinal sectional view of a joint portion, and FIG. 4B is a sectional view corresponding to the line II in FIG. is there. In the second embodiment, the joint part 110 joined to the pole body is configured by connecting a flat plate member 111 to a neck part 112 extending from the disk part 115. The flat plate member 111 has an arcuate tip, and two communication holes 113 and 114 are opened. Further, the water guide hole 116 is opened from the peripheral surface of the communication hole 113 toward the disc part 115 so as to communicate with the inside of the pole body. The joint structure between the pole body and the joint part is the same as that in the first embodiment.

  According to the present embodiment, an accessory such as an underwater flash can be attached to the plate-like joint part 110 in which the communication hole part 113 is formed so as to rotate and change the angle.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. 5A and 5B show an underwater camera arm according to a third embodiment of the present invention, in which FIG. 5A is a longitudinal sectional view of a joint portion, and FIG. 5B is a cross-section corresponding to line II-II in FIG. FIG. In the third embodiment, the joint part 120 joined to the pole body includes three plate-like members 121, 122, 123 extending from the disk part 125. The plate-like members 121, 122, and 123 are erected so as to be parallel to each other, and each plate-like member 121, 122, 123 has a through hole into which a bolt 126 that is a screw member that changes the interval can be inserted. Portions 121a, 122a, 123a are formed.

  In this joint portion 120, the accessory is attached to the joint portion 120 via a fixture 128 that is fitted between the plate-like members 121, 122, and 123. The fixture 128 includes two parallel plate members 129 and 130. In a state where the fixture 128 is attached to the joint portion 120, the space between the plate-like members 121, 122, 123 of the joint portion 120 is narrowed by the bolt 126 and the wing nut 127, and the joint portion 120 and the fixture 128 are fixed. The head of the bolt 126 is embedded in the plate member 123 so as not to rotate.

Further, the circular plate portion 125 is provided with a water introduction hole portion 124 communicating with the inside of the pole body. The joint structure between the pole body and the joint part is the same as that in the first embodiment.
According to the present embodiment, accessories such as an action camera and an underwater flash can be attached to the joint portion 120 constituted by the plurality of plate-like members 121, 122, and 123 so as to rotate and change the angle.

<Fifth Embodiment>
Next, an arm member according to a fifth embodiment of the present invention will be described. In the arm member 130 according to this embodiment, a cylindrical metal member 132 is bonded to one end of a cylindrical pole member 131 made of carbon fiber reinforced plastic with an adhesive. A male threaded portion 133 is formed on the outer peripheral surface of the protruding portion 134. Furthermore, on the inner side surface of the cylindrical member 132, as in the first embodiment, a plurality of projecting portions 134 projecting inward by a predetermined dimension in the cross-sectional shape along the axis O are formed.

  The protrusions 134 are formed at predetermined intervals in the axial direction, and these form an uneven portion 135. The inner diameter of the uneven portion 135 is larger than the outer diameter of the pole member 131, and the tip of the protruding portion 134 does not contact the pole member 131 in a state where the cylindrical member 132 is fixed to the pole member 131. For this reason, the adhesive 145 is interposed between the protrusion 134 and the outer peripheral surface of the pole member 131 in a state where the adhesive is filled to insulate the two. In this example, the protruding portion 134 has a substantially rectangular cross-sectional shape, and the uneven portion 135 has a helical female screw shape on the inner peripheral surface of the cylindrical portion.

  In the present embodiment, a first spacer member 141 and a second spacer member 142 are disposed between the pole member 131 and the protruding portion 134. In this embodiment, the space between the first spacer member 141 and the second spacer member 142 between the outer peripheral surface of the pole member 131 and the protruding portion 134, and the pole member 131 and the protruding portion 134 are It is filled with an adhesive that adheres while insulating. With this adhesive, the pole member 131 and the cylindrical member 132 are fixed, and the inner pole body 30 and the second ball joint member 50 are insulated from each other.

  The first spacer member 141 and the second spacer member 142 have the same configuration as the first spacer member 80 and the second spacer member 90 in the first embodiment. According to this embodiment, the metallic cylindrical member 132 is not corroded by seawater or the like, and other members can be screwed into the outer periphery of the cylindrical member.

  The arm member according to the present invention has an effect of realizing an arm for an underwater camera that does not corrode even when used in seawater for a long period of time and does not corrode in sea, and has industrial applicability. .

10: Arm for underwater camera 20: Outside pole body (pole body)
30: Inside pole body (pole body)
31: One end 31a: End surface (cut surface)
40: First ball joint member (ball joint member)
50: Second ball joint member (ball joint member)
60: Cap part 61: Cylindrical part 62: Disk part 63: Projection part 64: Concavity and convexity part 70: Spherical joint part 71: Spherical part 72: Neck part 73: Rubber ring 74: Groove part 75: Water guide hole part 76: Female thread part 80: first spacer member 81: annular spacer portion 82: short cylindrical spacer portion 90: second spacer member 91: short cylindrical spacer portion 92: flange portion 100: adhesive

Claims (8)

A cylindrical pole member formed of carbon fiber reinforced plastic, and an arm member made of a metallic cylindrical member joined to one end of the pole member,
The cylindrical member covers an outer peripheral surface of the one end portion of the pole member, and a plurality of projecting portions projecting inward by a predetermined dimension in a cross-sectional shape along the axis on the inner peripheral side at predetermined intervals in the axial direction. With uneven portions formed by separating
A first spacer member that contacts the end surface of the one end of the pole member and separates the outer peripheral surface on the one end side of the pole member and the inner peripheral surface of the tubular member;
A second spacer member that separates the outer peripheral surface of the pole member and the inner peripheral surface of the other end portion of the cylindrical portion;
Insulating the pole member and the cylindrical member in a space formed between the outer peripheral surface of the pole member and the cylindrical member and between the first spacer member and the second spacer member. An arm member characterized by being filled with an adhesive that adheres while sticking. The cylindrical member includes a joint member to which another member can be connected,
The joint member is formed of a cap portion that includes a cylindrical portion that covers the end surface of the one end portion of the cylindrical member and the pole member, and a joint portion that is formed adjacent to the cap portion and can be connected to other members. The arm member according to claim 1, comprising:   The arm member according to claim 2 or 3, wherein the joint member is provided with a water guide hole portion that communicates from the joint portion to the inside of the pole body.   The arm member according to claim 2 or 3, wherein the joint portion has a spherical shape.   The arm member according to claim 2 or 3, wherein the joint portion includes a flat plate member having a communication hole portion.   The joint member includes a plurality of plate-like members that are erected so as to be parallel to the cap portion, and the plate-like member can be inserted with a screw member that changes the interval between the plate-like members. The arm member according to claim 2 or 3, wherein a hole is formed and configured.   2. The arm member according to claim 1, wherein a male screw portion is formed on an outer periphery of the cylindrical member, and the cylindrical body having the female screw portion is configured to be screwed.   The arm member according to any one of claims 1 to 7, wherein the protruding portion formed on the inner surface of the cylindrical portion of the cap portion is formed in a spiral shape.