JP3299175B2 - Cooling device for swivel of imaging unit housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a swivel of an imaging unit housing which can suppress an increase in the internal temperature of the swivel of the imaging unit housing which houses the imaging unit.

[0002]

2. Description of the Related Art In some cases, a monitoring camera system for monitoring the situation from a distance is provided around a passage until hot metal flowing out of a blast furnace flows into a mixed iron wheel. The place where the surveillance camera system is installed has a relatively high ambient temperature, for example, about 70 degrees Celsius. The internal temperature of the table must be properly maintained at about 40 degrees or less because the allowable ambient temperature of the imaging unit is, for example, about 40 degrees. In such a case, a cooling device that suppresses a rise in temperature inside the imaging unit housing and the swivel table has been proposed. The cooling device may be, for example, one in which a plurality of supply paths for supplying cooling air as a cooling medium are independently provided in the imaging unit housing and the swivel table, or one supply path for supplying cooling air as a cooling medium.
The following are proposed.

[0003]

For example, if a single supply path for supplying cooling air as a cooling medium is provided for facilitating installation of a surveillance camera system, the cooling device includes A cooling air circulating passage provided inside the pedestal for communicating between the inside of the imaging unit housing and the inside of the swivel; and an internal space of the swivel and the internal space of the imaging unit housing via the cooling air circulating passage. And a cooling air supply unit that supplies cooling air to the cooling air supply pipe.

With this configuration, when a predetermined amount of cooling air from the cooling air supply unit is supplied to the cooling air supply pipe in the swivel, the cooling air is supplied to the inside of the imaging unit housing. It is ejected from one end of the supply pipe, fills the inside of the imaging unit housing, is circulated through the cooling air circulation passage and the internal space of the swivel, and is discharged to the outside. Thus, the temperature of the air inside the imaging unit housing and the turntable is maintained at a predetermined temperature or lower without increasing. However, when the supply path of the cooling air is one system, for example, a plurality of electric cables that electrically connect between the imaging unit in the imaging unit housing and the output unit of the imaging signal in the swivel or the imaging unit A plurality of electric cables for electrically connecting the power supply and the input section of the imaging control signal in the swivel base are provided together with the cooling air supply pipe in the cooling air circulation passage due to heat resistance.

Accordingly, in order to ensure a sufficient circulation flow rate of the cooling air, it is necessary to increase the cross-sectional area of the cooling air circulation passage, so that the size of the imaging unit housing and the swivel base are increased. In addition, it is difficult to sufficiently cool the electric cable.

In view of the above problems, the present invention is directed to a cooling device for a swivel of an imaging unit housing that can suppress an increase in the internal temperature of the swivel of the imaging unit housing that houses the imaging unit. In addition, without increasing the size of the imaging unit housing and the swivel base, an increase in the temperature inside the imaging unit housing and the swivel base can be suppressed, and the imaging unit can efficiently cool the electric circuit. An object of the present invention is to provide a cooling device for a swivel of a container.

[0007]

In order to achieve the above-mentioned object, a cooling device for a swivel of an imaging unit housing according to the present invention includes: a cooling unit for supporting an imaging unit housing which houses an imaging unit; A cooling pipe that is arranged through the space and guides the cooling medium to the internal space of the imaging unit housing; one end is connected to the connection port of the swivel, and the other end is connected to the connection port of the imaging unit housing, A jacket member for covering an externally exposed portion of the tube, and an externally exposed portion of an electric path provided between the imaging unit housing and the swivel, and supplying a cooling medium to an internal space of the imaging unit housing. A cooling medium supply port for delivering the cooling medium between the inner peripheral portion of the jacket member and the periphery of the cooling pipe and the electric circuit through the internal space of the swivel and the connected port, while sending the cooling medium to the cooling pipe; Prepared,
The jacket member discharges the supplied cooling medium to the outside.
One end of the cooling tube is connected to the connection port of the imaging unit housing.
Through the sealing member that seals the
It is characterized by being provided .

[0008]

Further, the imaging unit housing has a protective cover at a position between the imaging unit and the subject, and the cooling medium supplied into the imaging unit housing by the cooling pipe is supplied to the outer surface of the protection cover through the cooling medium ejection passage. May be spouted.

[0010]

FIG. 3 shows an external view of an example of a cooling device for a swivel of an imaging unit housing according to the present invention.

The example shown in FIG. 3 is, for example, a monitoring device, which is a base 2 installed at a predetermined place facing a subject.
And a swivel table 4 rotatably supported in a horizontal plane at the upper end of the base 2, and an imaging unit housing 6 provided on a base frame 54 swingably provided on the swivel table 4. It is configured.

As shown in FIGS. 3 and 4, the base 2 continuously supplies cooling air to an end on the rear side of the front subject in the direction indicated by the arrow F. A cooling air inlet 8 connected to the supply source CAS, a coaxial cable connector 10 for outputting an imaging signal from an imaging unit 92 described later, and an imaging control connector for inputting a control signal to be supplied to the imaging unit 92 12 and a motor control connector 14 for inputting a drive control signal to motors 32 and 36 provided in the swivel 4 to be described later.

The coaxial cable connector 10 and the imaging control connector 12 have an imaging signal cable 1 respectively.
06, one end of the control signal cable 104 is connected. One end of the control signal cable 108 is connected to the motor control connector 14. Cooling air intake 8
Are connected to a Y-shaped connector 100. One branch pipe of the Y-shaped connector 100 is connected to a cooling air supply tube 102 described later. The Y-shaped connector 10
The other branch pipe 0 is open to the internal space of the base 2.

The pressure and flow rate of the cooling air from the cooling air supply source CAS are, for example, 5 (kg / cm
² ), 300 (liter / min).

As shown in FIG. 7, a boss 2B having a through hole 2b protrudes downward and substantially at the center of the upper end of the base 2 on the inner surface side. A cylindrical support shaft 16 is fitted into the through hole 2b of the boss 2B, and extends toward the inside of the swivel base 4. A plurality of screws BS are formed at the lower end of the support shaft 16 so that a plurality of screws BS pass through the through holes 2 through the through holes of the flange portion.
It is fixed to the boss 2B by being fastened to the peripheral portion of b.

The swivel base 4 has a base plate 4B disposed opposite to the upper end of the base 2, a base plate 4B fixed to an open end at the lower end, and a horizontal rotation mechanism and a swing mechanism which will be described later. And a main body 4A that accommodates the

As shown in FIG. 7, a screw BS2 is provided at the lower end of the main body 4A on the base plate 4B.
Is fixed to the lower end of the main body 4A. The base plate 4B has a bearing housing part 4H projecting upward inside the main body part 4A at a position corresponding to the support shaft 16 of the base 2.
A bearing member 22 and a bearing member 20 are provided in concave portions which are opposed to each other at a predetermined interval along the center axis of the support shaft 16 in the bearing housing portion 4H. The bearing member 22 and the bearing member 20 are arranged such that the center of rotation thereof coincides with an axis concentric with the center of the support shaft 16. On the inner periphery of the bearing member 22 and the bearing member 20,
The support shaft 16 is fitted. Also, bearing member 2
0 is provided with a seal member 18.

A worm wheel 24 is fastened to the upper end surface of the bearing housing portion 4H via the worm wheel 24 by a plurality of screws.
It is fixed to the upper end surface of the bearing housing part 4H. The upper end of the support shaft 16 passes through a through hole in the center of the worm wheel 24. The worm wheel 24 is meshed with a worm 26 fixed via a reduction mechanism 38 to an output shaft of a motor 36 provided on a support member inside the main body 4A.

Thus, when the motor 36 is operated and the worm 26 is rotated in the forward or reverse direction, the base plate 4B and the main body 4A are moved together with the worm wheel 24 in a predetermined angular range.
Relative to the horizontal plane. Accordingly, the support shaft 16, the worm wheel 24 and the worm 26
And the motor 36 form a horizontal rotation mechanism.

A rotation support shaft 40, which will be described later, is provided around the bearing housing 4H on the base plate 4B.
As shown in FIG. 3, female screw holes 4d, 4e, and 4f having a diameter of 6 (mm) are provided in a straight line, for example, at positions below. Female screw hole 4
d, 4e, and 4f are provided for adjusting the amount of cooling air discharged to the outside. The amount of cooling air discharged to the outside is adjusted, for example, by screwing screws so that the total amount of cooling air discharged from three locations becomes 60 (liter / min).

As shown in FIG. 7, a rotary support pipe 42 and a rotary support shaft 40 are provided on the common axis inside the main body 4A so as to intersect substantially perpendicularly with the extension of the support shaft 16. ing. One end of the rotation support shaft 40 is rotatably supported by a bearing 50. The bearing 50 is provided in the bearing housing 46 fitted in a through hole provided in one side surface of the main body 4A.
The bearing housing 46 is fixed to one side surface of the main body 4A by fastening a screw to one side surface of the main body 4A through a plurality of through holes of the flange portion.

On the other hand, the other end of the rotation support shaft 40 is connected to one end of the opposite rotation support pipe 42 by a joint member 44. As shown in FIGS. 7 and 8, the sector gear 28 is fixed between a portion of the rotary shaft member 40 supported by the bearing 50 and a portion to which the joint member 44 is connected. On the outer peripheral portion of the sector gear 28, a tooth portion having a predetermined circumferential angle is formed.

The sector gear 28 is meshed with the worm 30. Both ends of the worm 30 are rotatably supported by bearings provided in the main body 4A. One end of the worm 30 is connected to an output shaft of a motor 32 arranged in parallel with the motor 36 described above.
Are connected via

Thus, when the motor 32 is operated and the worm 30 is rotated in the forward or reverse direction, the sector gear 28 moves with the rotation support shaft 40 and the rotation support pipe 42 as indicated by the arrow shown in FIG. It will be rocked in the direction shown. Therefore, the worm 30,
Sector gear 28, rotation support shaft 40 and rotation support pipe 4
2 forms a swinging mechanism. And
As shown in FIG. 7, one end of the rotation support shaft 40 is connected to one side surface of the base frame 54, so that the base frame 54 is connected to the sector gear 28 as shown by a two-dot chain line in FIG. Predetermined rotation angle range according to the swing of
For example, it is tilted obliquely downward to the left with respect to the horizontal direction within a maximum range of about 65 degrees.

The other end of the rotation support pipe 42 is rotatably supported by a bearing 52. Bearing 52
Is provided in a bearing housing 48 fitted in a through hole provided in the other side surface of the main body 4A. The bearing housing 48 is fixed to the inside of the other side surface of the base frame 54 by connecting a screw to a flange portion of the base frame 54 through a through hole provided in the other side surface portion of the base frame 54, so that a connection flange member 116 to be described later is formed. And is fixed to face. Further, a portion of the rotation support pipe 42 to which the joint member 44 is connected is connected to a cooling air supply tube 102 and an image signal cable 10 described later.
The notch 42a through which the control signal cable 6 and the control signal cable 104 pass is open downward at a position corresponding to the notch 44a of the joint member 44.

As shown in FIGS. 3 and 4, the base frame 54 is attached to one end of the rotary support shaft 40 and the other end of the rotary support pipe 42 so as to cover the upper side and both side surfaces of the main body 4A of the swivel base 4. Are linked. Base frame 5
As shown in FIG. 7, one side of the rotation support shaft 4 has a plurality of screws fastened to one end of the rotation support shaft 40 via the connection plate 56 with one end of the rotation support shaft 40 inserted into the through hole. As a result, it is fixed to one end of the rotation support shaft 40.

The other side surface of the base frame 54 is connected to the connection flange member 1 to which the elbow member 114 is connected.
A plurality of screws are fastened to the rotary support pipe 42 via the connection flange member 116 and the side surface while being held between the rotary support pipe 42 and the rotary support pipe 42, thereby being fixed to the other end of the rotary support pipe 42 I have.

On the upper surface of the base frame 54, a gantry 86 for supporting the imaging unit housing 6 is fixed by fastening with screws and nuts. The gantry 86 is
A plurality of screws are fixed to the bottom surface portion of the outer peripheral surface of the imaging unit housing 6 via a through hole of the gantry 86 and a rubber packing 88 by being fastened to the bottom surface portion.

Four spacer shafts 62 and two spacer shafts 58 and 60 are provided on the outer peripheral surface of the upper surface and both side surfaces of the base frame 54, respectively, substantially perpendicular to each surface. . The four spacer shafts 62 are two of the spacer shafts 62.
Are disposed so as to face the side surfaces of the imaging unit housing 6, respectively. Also, four spacer shafts 62,
One end of each of the two spacer shafts 58 and 60 is connected to a heat shield plate 66 that covers the upper surface and both side surfaces of the base frame 54 and the outer peripheral surface of the imaging unit housing 6. The heat shield plate 66 is supported by the four spacer shafts 62 and the two spacer shafts 58 and 60 by fastening the screws BS3 to the spacer shafts 62, 58 and 60 through the respective through holes. It will be.

Further, between the subject and the base 2 and the swivel base 4, as shown in FIGS. 5 and 6, a heat shield plate BA curved so as to surround the base 2 and the swivel base 4. Are arranged.

As shown in FIG. 1 and FIG. 2, the imaging unit housing 6 has a housing case 68 which is supported by a gantry 86 and houses an imaging unit 92 which will be described later. Back cover member 70 that covers an opening formed in the back portion
And a protective cover support member 72 provided on the front surface of the case body 68.

The back cover member 70 is fixed to the peripheral edge of the opening at the back of the case body 68 by fastening the four screws BS6 to the case body 68 through the through holes. . Also, as shown in FIG. 4, the back cover member 70 is connected to the case body 68 by the hinge member HG, so that when the four screws BS6 are removed, the back cover member 70 is As shown by the dashed line, it is opened without falling off.

The protective cover support member 72 includes a seal member 78.
The four screws BS4 are fastened to the case main body 68 through the through holes so as to be fixed to the front surface of the case main body 68. The protective cover support member 72 is
The protective glass plate 76 is a reflective glass plate that reflects infrared light from a subject passing through an opening 72a provided at a substantially central portion. The protective glass plate 76 as a protective cover is disposed at a substantially central portion along the thickness direction of the protective cover support member 72 with the sealing member 74 interposed therebetween so as to close the opening 72a.

1 and 2 are provided above the protective glass plate 76 in the protective cover support member 72.
As shown in FIG. 7, for example, nine female screw holes 72H are provided at predetermined intervals on a straight line. Each female screw hole 72H is provided corresponding to each through hole 78a of the sealing material 78 and each through hole 68a of the case main body 68, respectively. Thus, each female screw hole 72H allows the outside air to communicate with the internal space of the case main body 68.

At this time, the nine female screw holes 72H are screwed into the plurality of female screw holes 72H so that the total amount of cooling air blown out through the female screw holes 72H is, for example, about 200 (liter / min). Is screwed in and adjusted. Nine female screw holes 7 in protective cover support member 72
At the position facing 2H, one end has a protective cover support member 7.
2 is provided. Wind guide plate 80
Is formed in a curved shape so that the cooling air jetted from the female screw hole 72H is blown toward the outer surface of the protective glass plate 76 in the direction indicated by the arrow shown in FIG.

At the periphery of the opening 72a in the front of the protective cover support member 72, four spacer shafts 8 are provided.
2 are provided substantially perpendicular to the front surface. A heat shield plate 84 is fixed to one end of the spacer shaft 82. The heat shielding plate 84 is formed by fastening the screw BS5 to one end of the shaft 82 through the through hole.
Is fixed to one end. The heat shield plate 84 has an opening 84a at a position facing the protective glass plate 76.

As shown in FIGS. 1 and 2, a support base 90 for supporting the optical section 94 and the image pickup section 92 is fixed to the bottom surface inside the case body section 68.

The optical section 94 is composed of a group of optical elements for forming an image of a subject on the image pickup surface of the solid-state image pickup element of the image pickup section 92. The imaging unit 92 is configured to include, as main components, a solid-state imaging device, an output unit that sends out an imaging signal from the solid-state imaging device, and an input unit that is supplied with a control signal.

A terminal block 98 to which one end of the imaging signal cable 106 and one end of the control signal cable 106 are electrically connected is provided near the back cover 70 on one side surface inside the case body 68. One end of an imaging / control cable 110 that is electrically connected to the imaging signal cable 106 and the control signal cable 104 is connected to the terminal block 98. The other end of the imaging / control cable 110 is connected to an output unit and an input unit of the imaging unit 92.

Above the imaging unit 92, one end of the cooling air supply tube 102 is supported by the bracket member BK and is arranged so as to face the imaging unit 92.

A temperature sensor 96 for detecting the internal temperature of the case body 68 is provided on the front side of one side surface inside the case body 68. The temperature sensor 96 sends a detection output signal to a warning display control unit (not shown). The warning display control unit, when the internal temperature is, for example, 45 degrees or more based on the detection output signal,
Cause the display unit to perform a warning operation.

The support 9 inside the case body 68
The glass wool having a thickness of about 10 mm as a heat insulating material except for the opening 68b, the through hole 68a, the connection port 68j, the terminal block 98, and the periphery of the temperature sensor 96 is provided around the periphery of the zero and the entire inner peripheral surface. (GW424) 69 is attached.

In the example of the cooling device for the swivel base of the imaging unit housing according to the present invention, a base frame 54 is further provided between the imaging unit housing 6 and the swivel base 4 as shown in FIG. Connection flange member 11 provided on one side surface of
A flexible tube 112 made of, for example, stainless steel as a jacket member is disposed between the elbow member 14 connected to the connector 6 and the connection port 68j of the case body 68. The flexible tube 112 has, for example, an outer diameter of about 55 (mm) and an inner diameter of about 41 (mm). One end of the flexible tube 112 is joined to the elbow member 14 by welding. On the other hand, the other end of the flexible tube 112 is connected to the case body 68 by fastening the flange 112F, which is joined by welding, to the outer surface of the case body 68 which is a peripheral edge of the connection port 68j with a plurality of screws. It is connected to port 68j.

In the flexible tube 112, a cable 106 for imaging signals from the swivel table 4, a cable 104 for control signals, and a cooling air supply tube 102 are inserted and arranged.

As shown in FIG. 1, an outlet 112a opening upward is provided at a portion of the flexible tube 112 upstream of the vicinity of the flange portion 112F.
It is provided in the place. As a result, the cooling air supplied into the flexible tube 112 is discharged to the outlet 11
2a. Outlet 112a
Is, for example, a female screw hole having a diameter of about 5 (mm). At that time, screws are screwed into the female screw holes so that the total discharge amount of the cooling air discharged from the three discharge ports 112a is, for example, 40 (liter / min).

A packing 118 is press-fitted into the inner periphery of the flange 112F of the flexible tube 112. The packing 118 is connected to the imaging signal cable 10.
6 and a hole through which the control signal cable 104 passes;
And a hole through which the cooling air supply tube 102 penetrates. At this time, the gap between each hole and each cable or the cooling air supply tube 102 is sealed because the packing 118 is press-fitted. As a result, the cooling air supplied into the flexible tube 112 is
By being discharged from the discharge port 112a after colliding with the end surface of the cable 18, the imaging signal cable 106 and the control signal cable 104 are efficiently cooled by the cooling air.

In this configuration, when the cooling air is supplied to the Y-shaped connector 100, the cooling air is ejected through one branch pipe in the direction indicated by the arrow shown in FIG. It is supplied to the inner space of the swivel 4 through the inner space and the inside of the support shaft 16. A part of the cooling air supplied to the internal space of the swivel 4 is discharged through the outlets 4d to 4f, and another part of the cooling air is supplied into the flexible tube 112 through the notch 42a of the rotary support pipe 42. After the outlet 112
a. As a result, the above-described cables are cooled.

The cooling air is supplied to a cooling air supply tube 102 connected to the other branch pipe of the Y-shaped connector 100.
The cooling air is ejected to the imaging unit 92 in the imaging unit housing 6 through the, so that the temperature rise of the imaging unit 92 is suppressed and the temperature inside the imaging unit housing 6 is suppressed. . At this time, the cooling air inside the imaging unit housing 6 is jetted to the outside through the female screw hole 72H, and is guided along the inner surface of the air guide plate 80 and is blown to the outer surface of the protective glass plate 76. . Thus, the temperature rise of the protective glass plate 76 is suppressed, and dust and the like attached to the outer surface of the protective glass plate 76 are removed.

The monitoring device described above was placed in a predetermined constant temperature bath, and a confirmation test of each internal temperature was performed by the present inventor.

Under the condition that the temperature in the thermostat is maintained at about 70 ° C., the supplied cooling air amount is 300 (liter / liter).
min) and the total discharge amount is set as described above, the internal temperature of the swivel 4, the temperature in the flexible tube 112, and the internal temperature of the imaging unit housing 6 are 55, 50, respectively. It was confirmed that the angle was 40 degrees or less.

When replacing the imaging unit housing 6 as described above with a new imaging unit housing, first, the back cover member 70 of the imaging unit housing 6 is opened, and then the imaging signal on the terminal block 98 is set. One end of the control cable 106 and the control signal cable 104 and one end of the imaging / control signal cable 110 are detached from the terminal block 98, and the flange 112F of the flexible tube 112 is connected to the case body 68.
Removed from the side. Next, the gantry 86 supporting the imaging unit housing 6 is removed from the upper surface of the base frame 54.

After the new image pickup unit housing to which the gantry 86 is attached is fixed to the upper surface of the base frame 54, one end of each cable is connected to the terminal block 98, and the case body of the flange 112F is connected. The replacement of the new imaging unit container is completed by attaching the unit 68 to the side surface and closing the back cover member.

Therefore, the image pickup unit housing 6 can be easily replaced.

In the above-described example, an example of the cooling device for the swivel of the imaging unit housing according to the present invention is applied to the monitoring device. However, the present invention is not limited to such an example, and is installed at a relatively high temperature. Needless to say, the present invention may be applied to a swivel table of a device provided with an imaging unit housing.

[0055]

As apparent from the foregoing description, according to the swivel base of the cooling device of the imaging unit container according to the present invention, Ja
The part of the cooling pipe exposed to the outside of the cooling pipe,
And the electric path provided between the imaging unit
Cover the exposed portion of the
The member has a through hole for discharging the supplied cooling medium to the outside.
One end of the cooling pipe seals the connection port of the imaging unit housing.
Provided in the internal space of the imaging unit housing via a sealing member
Therefore, without increasing the size of the imaging unit housing and the swivel base,
Suppresses temperature rise inside the imaging unit housing and swivel
And the cooling medium warmed in the jacket member
The temperature of the cooling medium discharged outside is always maintained at the specified temperature.
Cooling the electric circuit in the jacket member efficiently
Can be .

Further, since the cooling medium is supplied between the inner peripheral portion of the jacket member and the periphery of the electric circuit, there is an advantage that the electric circuit can be efficiently cooled.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of a cooling device for a swivel of an imaging unit housing according to the present invention.

FIG. 2 is a partial cross-sectional view of the example shown in FIG. 1 as viewed from a side.

FIG. 3 is a side view of the example shown in FIG. 1;

FIG. 4 is a rear view of the example shown in FIG. 1;

FIG. 5 is a front view of the example shown in FIG. 1;

FIG. 6 is a bottom view in the example shown in FIG. 5;

FIG. 7 is a partial sectional view of the example shown in FIG. 5;

FIG. 8 is a partial sectional view of the example shown in FIG. 3;

[Explanation of symbols]

 REFERENCE SIGNS LIST 4 swivel base 6 imaging unit housing 8 cooling air intake 72H female screw hole 80 air guide plate 102 cooling air supply tube 106 imaging signal cable 112 flexible tube 118 packing

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-154193 (JP, A) JP-A-10-173960 (JP, A) JP 6-81170 (JP, U) JP 4 5774 (JP, U) Shokai Sho 57-128274 (JP, U) Shokai Hei 1-129964 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 5/222-5 / 247

Claims (2)

(57) [Claims] A cooling pipe that is arranged through an internal space of a swivel table that supports an imaging unit housing that houses an imaging unit, and that guides a cooling medium to the internal space of the imaging unit housing; The cooling pipe is connected to a connection port, and the other end is connected to a connection port of the imaging unit housing, and is provided outside the cooling pipe and between the imaging unit housing and the swivel base. A jacket member that covers a portion of the electric circuit that is exposed to the outside; a cooling medium that is supplied to the cooling pipe to supply the cooling medium to the internal space of the imaging unit housing; A cooling medium supply port for sending out the cooling medium between an inner peripheral portion of the jacket member and around the cooling pipe and the electric path through a connection port.
The jacket member discharges the supplied cooling medium to the outside.
One end of the cooling pipe has an opening through which the imaging unit is housed.
The image pickup unit is accommodated through a sealing member that seals a connection port of a body.
A cooling device for a swivel of an imaging unit housing, which is provided in an internal space of a container. 2. The imaging unit housing has a protective cover at a position between the imaging unit and a subject, and a cooling medium supplied into the imaging unit housing by the cooling pipe passes through a cooling medium ejection passage. 2. The cooling device according to claim 1, wherein the cooling device is ejected to an outer surface of the protective cover.