JP3482767B2 - Automatic change device for lighting in tunnel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tunnel lighting device exchanging device in which the entire device is guided and guided by one guide rail. The present invention relates to an automatic device for exchanging a lamp in a tunnel, which is capable of performing a lamp exchanging work without hindrance.

[0002]

2. Description of the Related Art First, a conventional automatic lamp changing device will be described with reference to FIGS. 1 to 7 which are drawings according to the present invention and FIG. 12 which is a drawing of a conventional device. A large number of lamps H are attached to the wall surface W in the tunnel at predetermined intervals, and a device for automatically exchanging the lamps H is connected to the head motor vehicle A and this. As shown in FIG. 12, the power vehicle A and the exchange vehicle B are both inverted T-shaped and are arranged close to the wall surface of the tunnel. And two L-shaped guide rails G ₁ and G ₂ guide the vehicle.

As shown in FIGS. 1 and 2, the leading power vehicle A and a plurality of exchange vehicles B towed by the leading vehicle A are connected to each other via a connecting tool 1 provided on each of them.
Guide rollers R ₁ are provided in front of and behind the vehicles A and B, respectively. As shown in FIG. 7, this guide roller R
Reference numeral ₁ denotes a first roller 3 which runs while being directed to both end surfaces of the horizontal guide plate 2 of the inverted T-shaped guide rail G ₁ , and a second roller 4 which is directed to the upper surface of the horizontal guide plate 2. Composed. The first roller 3 is driven to rotate about the vertical axis, and two pairs of left and right are provided, and two pairs are provided along the front-rear direction. The second roller 4 is driven to rotate about the horizontal axis. Thus, a pair is provided with the standing plate 5 sandwiched therebetween. Each of the first and second rollers 3, 4 constituting the guide roller R ₁
Are all supported by the support plate 6, and the support plate 6
Are rotatably supported on the frame F of the power vehicle A and the exchange vehicle B about a vertical axis. Further, the front power vehicle A is provided with a pair of drive rollers R _{3 in} front of and behind it. The pair of drive rollers R ₃ are driven and rotated about the vertical axis and are directed to both side surfaces of the upright plate 5 of the guide rail G ₁ .

Further, as shown in FIG. 12, a motor vehicle A
Also, an arm 7 is attached to the support plate 6 of each guide roller R ₁ mounted in front of and behind the exchange vehicle B, to the side thereof, and obliquely upward, and is supported on the upper end of the arm 7. The paired guide rollers R ₂ are L-shaped guide rails G ₂
The horizontal guide plate 8 is sandwiched from above and below. in this way,
The motor vehicle A and the exchange vehicle B are configured to travel while being guided by the _two guide rails G ₁ and G ₂ via the respective guide rollers R ₁ and R ₂ . The guide rail G ₁ and the guide roller R ₁ function as a main body, and the guide rail G ₂ and the guide roller R ₂ function as an auxiliary.

Inside the motor vehicle A, a pair of drive rollers R
The mechanism for driving ₃ is built in, and the exchange car B
A lamp replacement unit U is internally provided inside. Each of the frames F of the power vehicle A and the exchange vehicle B has a substantially right-angled triangular shape in a side view, and two surfaces intersecting at right angles are arranged substantially vertically and substantially horizontally, respectively, and a slope portion thereof is formed. It is arranged so as to face the road in the tunnel from diagonally above. The reason why the shape of the frame F and the arrangement thereof are set as described above is as follows. That is, in the tunnel, a building limit line L as shown by a broken line in FIG. 12 is provided in order to ensure traveling safety, and various equipments in the tunnel and devices necessary for maintenance thereof are provided. This is because it is obligatory to arrange in the space S between the building limit line L and the wall surface W.

A lamp exchanging unit U installed in the exchange car B
about,

BEST MODE FOR CARRYING OUT THE INVENTION The detailed constitution will be described below in detail in the section of the embodiments. That is, the unit main body C is rotatably supported on the upper end portion of the frame F on the side of the tunnel wall surface W, and the lamp fixture D is attached to the unit main body C so as to be vertically movable. As shown in FIG. 8, mounting plates 10 are horizontally fixed to both side surfaces of a rectangular lamp H, and the lamp grippers D are two pairs of gripping pins. 9 are close to and away from each other, and are inserted into and removed from the first pin hole 11a horizontally provided on the end surface of the mounting plate 10. Further, after the unit main body C has rotated to the outer rotation end, the lamp fixture D projects from the unit main body C and descends to the lower end.

To remove the lamp H supported by the bracket 12 of the tunnel wall W for lamp replacement, the replacement vehicle B not holding the lamp H is mounted on the tunnel wall W. After horizontally turning the unit main body C to the outer turning end, the lamp gripping tool D is projected from the unit main body C and lowered to the lower end, Then, the two sets of the gripping pins 9 separated from each other are brought close to each other and inserted into the first pin holes 11a on both end surfaces of the mounting plate 10 of the lamp H, and the lamp gripping tool D is raised, and then the unit main body The lamp H is housed in the frame F by rotating C to the frame F side. On the other hand, in order to mount a new lamp H on the bracket 12 from which the lamp H has been removed, two sets of gripping pins 9 are attached to the first pin holes 11
After being inserted into a, a new lamp H is gripped and the unit body C is rotated to the outer rotation end, the lamp gripper D is projected from the unit body C, When descending to the descending end, the pair of fixing pins 13 fixed vertically to the bracket 12 are inserted into the pair of second pin holes 11b penetrating the respective mounting plates 10 of the lamp H, and the brackets are inserted. A new lamp H is attached to 12 and the lamp is replaced. Two sets of fixed cylinders 14 are attached to the upper surface of the frame F of the exchange vehicle B in the longitudinal direction.
Protruding rod 14a of the fixed cylinder 14, by sandwiching the standing plate 5 of the guide rails G _1, securing the frame F with respect to the guide rails G _1.

As described above, the conventional automatic lamp changing device is
Two guide rails are required, and the laying of this guide rail is limited in terms of the laying space regulated by the above-mentioned construction limit line L, or the laying cost is high. There is a high demand for a single product. However, as described above, the frame F of the exchange vehicle B is
In addition to its side surface having a right-angled triangle shape, the lamp replacement unit U is internally provided on the side of the vertical surface of the frame F facing the tunnel wall surface W, and when replacing the lamp, the Since the unit main body C pivots largely outward with respect to the frame F, and the lamp fixture D moves vertically with respect to the unit main body C, the center of gravity of the entire device at the time of lamp replacement is the tunnel wall surface. It moves greatly toward W. For this reason, if the number of guide rails is one, the center of gravity of the entire device largely moves to the side of the tunnel wall surface W when the lamp is replaced, so the entire replacement vehicle B inclines in the opposite direction, and the pair of fixing pins The position of the lamp H deviates from the position 13 and a new problem arises that the lamp cannot be replaced without any trouble.

[0009]

SUMMARY OF THE INVENTION The present invention relates to an automatic switching device for a lamp in a tunnel, even if there is only one guide rail for guiding the traveling of a motor vehicle and the vehicle to be replaced. The objective is to prevent the center of gravity from fluctuating significantly toward the side of the tunnel wall surface and to enable replacement of the lamp.

[0010]

In order to solve this problem, the means adopted by the present invention are a leading motor vehicle which is guided by a guide rail and runs along a wall surface of a tunnel, and a plurality of vehicles which are connected and towed by the leading motor vehicle. The exchange car has a structure in which a lamp exchanging unit is installed in a frame, and the frame has a right-angled triangular shape in a side view, and a slope portion thereof is inside a tunnel. The lamp replacement unit is arranged so as to face the road from diagonally above, and the unit main body is rotated by a rotation shaft provided in parallel with the wall surface at the end of the frame on the tunnel wall surface side. The lamp holder is supported so that it can be moved in and out of the unit body in the vertical direction. In a device for automatically exchanging a lamp installed in a vehicle, one guide rail is provided, and a balance weight is provided on a portion of the frame closer to the tunnel center than the center of gravity of the entire exchange vehicle by a driving means. The balance weight is mounted so as to be movable in a horizontal direction perpendicular to the rotation axis, and the balance weight is moved in a command direction by a command amount in accordance with the rotation of the unit main body and the movement of the lamp gripping tool. Controlling the drive means.

In order to replace the lamp, the unit main body is housed in the frame, and the unit main body is rotated outward with respect to the frame in a state where the lamp holder is inserted into the unit main body. When the lamp gripper is caused to project or the lamp gripper is projected from the unit body, the center of gravity of the entire exchange vehicle moves to the tunnel wall surface side. vice versa,
The unit body is rotated to the side of the frame when the unit body is rotated most outward with respect to the frame, or the lamp gripper is most protruded from the unit body, or the unit body is rotated. When the lamp gripping tool is retracted with respect to the main body, the center of gravity of the entire replacement vehicle moves in a direction away from the tunnel wall surface.

When the center of gravity of the entire exchange vehicle is about to move to the side of the tunnel wall surface, the balance weight drive means is controlled according to the rotational movement of the unit body and the protruding movement of the lamp gripper. Then, the balance weight is gradually moved by a set amount in the direction away from the tunnel wall surface. As a result, even when the lamp is being replaced, the center of gravity of the entire replacement vehicle is prevented from moving significantly, and the lamp replacement work can be performed without any hindrance. Further, when the center of gravity of the entire exchange vehicle is going to move away from the tunnel wall surface, if the balance weight is gradually moved in the opposite direction to the above by the control of the driving means, the entire exchange vehicle during the lamp replacement is A large shift of the center of gravity is prevented. Therefore, the lamp can be replaced without any trouble by the replacement vehicle that is guided by the single guide rail and travels. There are various methods for determining the moving direction and the moving amount of the balance weight and extracting the control signal to be input to the driving means. For example, the position of the center of gravity of the entire exchange vehicle can be calculated in advance according to the rotational position of the unit main body and the moving position of the lamp gripper, so a method of extracting the control signal according to each position of these moving bodies is available. is there. Further, when the center of gravity of the entire exchange vehicle is about to move, a rotational moment acts on the exchange vehicle to increase the pressure acting on the guide rail. Therefore, the increase in this pressure is detected and the control signal is taken out. It is also possible.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to Examples. FIG. 1 is a plan view showing a state in which two exchange vehicles B are connected to a power vehicle A, FIG. 2 is a rear view of the same, and FIG. 3 is an enlarged plan view of the exchange vehicle B.
5 is a front view of a replacement vehicle B showing a lamp replacement unit U, FIG. 5 is a schematic plan view of the same, FIG. 6 is a side view of the same, and FIG. 7 is a guide roller on a guide rail G _1. FIG. 8 is a side view showing a state in which R ₁ is attached, and FIG. 8 is a schematic perspective view of the lamp H. In addition,

2. Description of the Related Art The same parts as those described in the item of the above section are designated by the same reference numerals, and a duplicate description of the parts already described will be avoided to mainly describe the lamp replacement unit U and the balance adjusting device E. At the upper end of the frame F of the exchange vehicle B on the side of the tunnel wall W, a rotary shaft 15 is supported in parallel with the tunnel wall W, and the rotary shaft 15 receives the power of the first drive motor M _{1 from} the gear 16. , 17 and the chain 18 are transmitted and rotated. A unit body C is integrally attached to the rotating shaft 15. Linear guides 21 are provided along the vertical direction on the inner surfaces of the pair of side plates 19 that are integrally attached to both ends of the rotary shaft 15 so as to face each other, and the pair of linear guides 21 guide the ends of the lifting body 22. Body 23
Are fitted to each other, and the elevating body 22 is attached to the pair of side plates 19 so as to be able to ascend and descend. The unit main body C has a configuration in which a pair of side plates 19 are integrally connected by a connecting plate 24 described later.

As shown in FIGS. 4 to 6, the upper ends of the pair of side plates 19 are integrally connected by a connecting plate 24, and the connecting plate 24 has a central portion in the longitudinal direction.
The second drive motor M ₂ is mounted in a standing posture, and a ball screw 25 is vertically arranged in front of the drive motor M ₂ and rotatably supported by a bearing 26 mounted on the connecting plate 24. Has been done. The ball screw 25 is screwed into a ball nut 27 mounted on the elevating body 22, and has a gear 28 attached to the upper end of the ball screw 25 and a drive shaft (not shown) of the second drive motor M _2. ) Is in mesh with the gear 29 attached to the. Therefore, the rotation of the drive shaft of the second drive motor M ₂ causes the ball screw 25 to rotate.
Rotates, and the elevating body 22 moves up and down with respect to the pair of side plates 19.

Further, as shown in FIGS. 4 and 5, two sets of gripping pins 9 which are one set on two sides of the ball screw 25 in the lifting body 22 face inward with each other, They are arranged opposite to each other. That is, the pair of two gripping pins 9 are attached to the respective pin attachment plates 31, and each pin attachment plate 31 is laterally attached to the two guide bars 32 vertically provided on the elevating body 22. It is slidably supported. Further, a ball nut 33 attached to the base end portion of the pin attachment plate 31 and a ball screw 34 disposed directly below the two guide bars 32 in parallel therewith are screwed together to form a separate third drive. Each of the ball screws 34 is rotated through the gears 45 and 46 in which the rotation of the motor M ₃ meshes with each other.
And each ball screw 34 rotates,
Two sets of two gripping pins 9 mounted on each pin mounting plate 31 are configured to approach and separate from each other. The lamp gripping tool D according to the present embodiment is mounted on the lifting body 22 by two.
This is a configuration in which two sets of gripping pins 9 which are one set are mounted so as to approach and separate from each other.

Further, as shown in FIG. 8, the mounting plates 10 are fixedly mounted on both side surfaces of the lamp H, and the pair of gripping pins are provided on the end surface of each mounting plate 10. 9
Is provided with a pair of first pin holes 11a, and at the center of each mounting plate 10, the second pin hole 11 into which the fixing pin 35 provided in the installation part of the lamp H is inserted.
b is pierced.

Next, a characteristic part of the present invention will be described. As shown in FIGS. 1, 6 and 7, the power vehicle A and each exchange vehicle B are provided with guide rollers R _{1 at the} front and rear thereof, respectively, and one guide is provided via the guide rollers R _1. It is configured so that it travels while being guided by the rail G ₁ .

Further, in correspondence with the structure in which the power vehicle A and each exchange vehicle B are guided by _one guide rail G ₁ to travel,
A balance adjusting device E is attached to each exchange vehicle B. In the balance adjusting device E, when the lamp body is replaced, the center of gravity of the whole exchange vehicle B is set to the rotation shaft 15 by rotating the unit body C with respect to the frame F and moving the lamp holder D in and out of the unit body C. It is a device that prevents a large movement in the horizontal direction perpendicular to the axis and allows reliable replacement of the lamp. As shown in FIGS. 3 and 6, the rotary shaft 1 is provided on the upper surface of the frame F.
Balance weight that can move horizontally in a direction perpendicular to 5
6 and a control motor M ₄ for moving the balance weight 36 in the same direction. That is, on the upper surface of the frame F, two linear guides 37 for guiding the movement of the balance weight 36 are provided at predetermined intervals along the moving direction of the weight 36, and a bracket 38 is provided on the upper surface of the frame F. And a ball nut 39 provided inside the balance weight 36 and a bearing (not shown) provided on the bracket 38.
Is rotatably supported. In addition, the ball screw 4
The gear 42 provided at the end of the first motor and the control motor M
_The toothed belt 44 is attached to the gear 43 attached to the drive shaft ₄
Is hung. The control motor M ₄ is composed of a servomotor, and the motor M ₄ linearly moves the balance weight 36 in the command direction by a command amount.

As described above, the frame F of the exchange vehicle B
Has a right-angled triangular side surface, and the lamp replacement unit U is installed on the side of the vertical surface that faces the tunnel wall surface W. Therefore, the center of gravity of the entire replacement vehicle B is the same as the tunnel wall surface. It is largely biased toward the opposite vertical surface.
In addition to this, when the lamp H is replaced, the unit main body C rotates about the rotary shaft 15 provided on the frame F, and the unit main body C moves from the side of the vertical surface of the frame F to the side thereof. Since the lamp gripping tool D protrudes into the frame F or is housed inside the frame F, and the lamp gripping tool D moves up and down with respect to the unit body C, the lamp gripping tool D moves in and out of the unit body C. Replacement car B during lamp replacement
The center of gravity position of the whole will be further biased in the above-mentioned direction.

According to the present invention, while the lamp is being replaced, the balance weight 36 is moved in the direction opposite to the moving direction of the center of gravity of the replacement vehicle B in response to the movement of the center of gravity of the entire replacement vehicle B. The center of gravity of the entire body is kept at a substantially constant position so that the exchange vehicle B guided by _one guide rail G ₁ can replace the lamp H without any trouble. For this purpose, control is performed so that the balance weight 36 moves in a predetermined direction by a predetermined amount in accordance with the rotational position of the unit main body C with respect to the frame F and the moving position of the lamp fixture D with respect to the unit main body C. it is necessary to control the use motor M _4, in order to control the control motor M ₄ Thus, the control signal inputted thereto can be taken out by various methods.
For example, the rotation position of the unit main body C, and the lamp gripper D
Since the position of the center of gravity of the entire exchange vehicle B can be calculated in advance according to the moving position of the exchange vehicle B, when a control signal is taken out in accordance with each position of these moving bodies or the center of gravity of the entire exchange vehicle B moves. Causes a rotational moment to act on the exchange vehicle B,
There is a method of taking out the fluctuation of the pressure as a control signal by utilizing the fluctuation of the pressure exerted by the first and second rollers 3 and 4 on the guide rail G ₁ .

Next, after the used lamp is removed from the bracket 12 which is the lamp installation portion on the tunnel wall surface by the leading exchange car B, a new lamp H is attached by the succeeding exchange car B to the bracket 12. To install in the part of
This is done as follows. In the state shown in FIG. 9,
The unit main body C is located at the inward rotating end, and the lamp holding fixture D is located at the rising end with respect to the unit main body C. The two sets of gripping pins 9 are attached to the mounting plates 1 on both sides of the lamp H.
The lamp H is gripped by the lamp gripper D as shown by the two-dot chain line in FIG. On the other hand, the balance weight 36 that constitutes the balance adjusting device E is located at the backward end and maintains the overall balance of the exchange vehicle B that is supported by _one guide rail G ₁ in a suspended state. (The center of gravity of the entire exchange vehicle B is located almost directly below the guide rail G ₁ , and almost no rotational moment acts on the exchange vehicle B).

In the above-mentioned state, as shown in FIG. 10, the first drive motor M ₁ and the control motor M ₄ are simultaneously activated, and the unit main body C is centered around the rotary shaft 15.
Is rotated outward (toward the wall surface W of the tunnel) and the balance weight 36 is linearly moved toward the center of the tunnel (away from the wall surface W of the tunnel).
The clockwise rotation moment generated by the outward rotation of the unit body C and the counterclockwise rotation moment generated by the movement of the balance weight 36 to the central portion of the tunnel are substantially offset during the movement of both. It As a result, the center of gravity of the entire exchange vehicle B remains substantially directly below the guide rail G ₁ during the rotational movement of the unit main body C and even after the unit main body C has been rotated to the outer end thereof.

Next, as shown in FIG. 11, the second drive motor M ₂ and the control motor M ₄ are simultaneously activated,
When the lamp holder D is lowered with respect to the unit main body C located at the outer end and the balance weight 36 is further linearly moved in the above direction, rotational moments in mutually opposite directions are generated in the same manner as above. Substantially offset, the center of gravity of the entire exchange vehicle B remains located immediately below the guide rail G ₁ . Therefore, as a result of eliminating the displacement of the exchange vehicle B with respect to the absolute space, the accuracy of each stop position of the unit main body C and the lamp gripping tool D is maintained, and when the lamp gripping tool D is lowered with respect to the unit main body C, The bracket 12 is inserted into each second pin hole 11b provided in each mounting plate 10 of the lamp H that is gripped by the two sets of gripping pins 9.
Each of the fixing pins 13 fixed to is securely inserted.

Subsequently, by activating the pair of third drive motors M ₃ , the two sets of the two gripping pins 9 are separated from each other, and as shown by the solid line in FIG.
The gripping pin 9 is removed from the first pin hole 11a of each mounting plate 10, and then the balance weight 36 is moved to the tunnel wall surface W side, and at the same time, the lamp gripping tool D and the unit main body C are moved in the opposite direction to the above. Movement of the lamp fixture D, the unit body C, and the balance adjusting device E.
All return to their original position. In the replacement of the lamp, the used lamp is removed prior to the installation of the new lamp by the same movement as when the lamp gripper D and the unit main body C are returned.

Further, as shown in FIG. 9, when both the unit main body C and the lamp gripper D are housed in the frame F, the balance weight 36 is at the retracted end (closest to the tunnel wall surface W). Since the center of gravity of the exchange vehicle B is located almost directly below the guide rail G ₁ and the exchange vehicle B is designed so that no rotational moment is generated, the guide rail G _{1 is} guided. The roller R ₁ runs smoothly.

[0026]

As described above, according to the present invention, the center of gravity of the replacement vehicle is maintained at a substantially constant position when the lamp is replaced by mounting the balance adjusting device on the replacement vehicle that constitutes the automatic switching device for the in-tunnel lamp. Therefore, since it is possible to prevent the center of gravity position from largely fluctuating toward the tunnel wall surface, even if there is only one guide rail for guiding a plurality of exchange vehicles and a power vehicle for towing the exchange vehicles, The lamp can be replaced without any problem. Since the guide rail can be integrated into one, the guide rail can be laid with a margin in a narrow laying space regulated by the construction limit line, and the laying cost is reduced because it is one guide rail.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which two exchange vehicles B are connected to a power vehicle A.

FIG. 2 is a rear view of the same.

FIG. 3 is an enlarged plan view of an exchange vehicle B.

FIG. 4 is a front view of a replacement vehicle B showing a lamp replacement unit U.

FIG. 5 is a schematic plan view of the same.

FIG. 6 is a side view of the same.

FIG. 7 is a side view showing a state where a guide roller R ₁ is attached to a guide rail G ₁ .

8 is a schematic perspective view of a lamp H. FIG.

FIG. 9 is an operation explanatory view showing a side surface in a state where both the unit main body C and the lamp gripping tool D are housed in the frame F.

FIG. 10 is an operation explanatory view showing a side surface in a state where the unit main body C is rotated to an outer rotation end.

FIG. 11: The unit main body C rotates to the outer rotation end,
Moreover, it is an operation explanatory view showing a side surface in a state where the lamp gripper D is most protruded from the unit main body C and the lamp H is installed.

FIG. 12 is a schematic side view of a conventional automatic lamp changer that is guided by _two guide rails G ₁ and G ₂ .

[Explanation of symbols]

A: Motor vehicle B: Exchange vehicle C: Unit body D: Lamp gripper E: Balance adjustment device F: Frame G ₁ : Guide rail H: Lamp M ₄ : Control motor U: Lamp replacement unit W: Tunnel wall surface 9: Grip pin 15: Rotating shaft 36: Balance weight

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keizo Takizawa 150 Motoyashiki, Miyaya-cho, Toyohashi City, Aichi Shinto Electric Co., Ltd. Toyohashi Works (56) Reference JP-A-7-76999 (JP, A) Hei 5-67401 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F21S 1/00-2/00 F21F 17/00 F21V 21/00-25/00

Claims (2)

(57) [Claims] 1. A leading power vehicle that is guided by a guide rail and runs along a wall surface of a tunnel, and a plurality of replacement vehicles that are towed by the leading vehicle. The replacement vehicle includes a lamp replacement unit on a frame. The interior of the frame has a substantially right-angled triangular shape in a side view, and the slope portion of the frame is disposed so as to face the road in the tunnel obliquely from above. In the replacement unit, the unit main body is rotatably supported by a rotary shaft provided at the end of the frame on the tunnel wall surface side in parallel with the wall surface, and the lamp gripper is vertically moved with respect to the unit main body. A device for automatically replacing a lamp installed in a tunnel by rotating the unit body and moving the lamp gripping tool in and out. With one idler, a balance weight is attached to a portion of the frame closer to the center of the tunnel than the center of gravity of the entire exchange vehicle so as to be movable in the horizontal direction perpendicular to the rotation axis by the drive means. The drive means is controlled so that the balance weight moves in the command direction by the command amount according to the rotation of the unit main body and the movement of the lamp gripping tool, so that the center of gravity of the entire exchange vehicle during the lamp replacement is large. An automatic switching device for lighting equipment in a tunnel, which is characterized by preventing fluctuations. 2. The automatic exchanging device for an in-tunnel lamp according to claim 1, wherein an upper surface of the frame body is horizontal, and balance weights are arranged on the upper surface.