JP2000120207A - Roof opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof opening/closing device provided with an equalizing function, which is compactly constituted so as to be easily housed in a limitted space and in which the tension of two wire ropes can be adjusted and a winch does not immediately lose the loading capacity even if one wire rope is cut off. SOLUTION: This roof is opened or closed by simultaneously winding up two wire ropes 3a, 3b anchord to a movable roof 7 at the ends of the wire ropes 3a, 3b. A balance-shaped lever 9 is swingably pivoted in the movable roof 7 and the ends of the two wire ropes 3a, 3b are fixed to both ends of the lever 9, and a lever stopper restricting the swinging motion of the lever 9 is provided near to the lever 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof opening and closing device for opening and closing a roof with two wire ropes wound by a winch.

[0002]

2. Description of the Related Art As a roof opening / closing device for opening / closing a roof of a building such as a stadium, a method of winding two wire ropes having one end fixed to a movable roof with a winch is used.

FIG. 13 is a schematic plan view of a building provided with a roof opening / closing device using a winch, and FIG. 14 is a schematic sectional view showing a fully opened state (a) and a fully closed state (b) of the roof. The roof is composed of a fixed roof 58 having an opening 57 at the center and a movable roof 7 covering the opening 57. On the roof, a plurality of rails 23 which also serve as structural members of the fixed roof 58 are provided in parallel at intervals, and the movable roof 7 (see FIG. 14) mounted on the carriage 22 can move on the rails. I have.

[0004] One end of two wire ropes 3a, 3b wound up by the winch 1 arranged in the ground pit 59 via the lower sheave 5a, 5b and the upper sheave 6a, 6b is fixed to the movable roof 7, and the wire is wound. Rope 3a, 3b
Are guided by the guide sheave 60. Reference numeral 21 denotes a fixed roof side stopper provided on the fixed roof 58.

[0005] As a prior art for equalizing the tension of a wire rope when two wire ropes are wound by one winch, for example, a document “Practical Crane Handbook by Honda et al., Sangyo Tosho Publishing, Showa 39”, 74 There is an equalizer sieve method described on the page.

FIG. 15 shows a conventional combination pulley.
FIG. 16 is a diagram showing an example in which the combination pulley of FIG. 15 is simplified and applied to a roof opening / closing device.

In FIG. 15, the wire rope sent out from the winding drum 2 of the winch 1 returns to the winding drum 2 again through the moving pulley A group 61, the fixed pulley 62, the equalizer sheave 63, and the moving pulley B group 64. The wire ropes 3 a and 3 b are wound around the winding drum 2 from both ends of the winding drum 2. The fixed pulley 62 is supported by being mounted on a structure 65. The moving pulley A group 61 and the moving pulley B group 64 are mounted on a block 67 having a hook 66.
6 moves up and down by winding and rewinding the wire ropes 3b and 3b. In this system, the wire rope tensions on both sides are made equal by the equalizer sheave 63.

When the combination pulley shown in FIG. 15 is simplified and applied to a roof opening / closing device, as shown in FIG. 16, the movable roof 7 moves along a rail provided on a fixed roof structure 58. 22 and is opened and closed by the movement of the carriage 22. An equalizer sheave 63 is rotatably mounted on the movable roof 7, and the movable roof 7 is supported by a single continuous wire rope 3 a, 3 b drawn out from a winding drum 2 of a winch 1 installed on a fixed floor. ing.

The upper sheaves 6a and 6b for turning the wire ropes 3a and 3b are rotatably mounted on a frame disposed on a fixed roof 58. The lower sheaves 5a and 5b are rotatably mounted on a frame on a fixed floor.

[0010] The system shown in FIG.
Not only elongation as a whole of 3b, but also subtle speed differences and tension differences between the wire ropes 3a, 3b on both sides due to the installation positions of the upper sheaves 6a, 6b, lower sheaves 5a, 5b, etc. due to the roof shape, production / installation It is possible to eliminate the speed difference and the tension difference caused by the error.

[0011]

The above-mentioned roof opening / closing device uses one continuous wire rope and enables the wire rope to be moved by pulleys (sheaves), so that the tension difference between the wire ropes on both sides is eliminated. Although it is effective in doing so, there are the following problems.

First, there is a problem of dimensional restrictions. That is, the diameter of the equalizer sheave is 10 times smaller than the diameter of the wire rope according to the related standards such as the crane structure standard.
It is empirically known that the life of the wire rope is extremely shortened because the movement due to the wire rope is small at the limit of 10 times, and the load due to the bending is concentrated on a limited range of the wire rope. I have. Especially for equipment constructed on high places such as openable roofs, since the ecological sieve is a place where maintenance is difficult, it is required to make the inspection cycle and life of the wire rope etc. as long as possible. . Therefore, it is desirable that the diameter of the equalizer sheave is approximately the same as that of a normal sheave, that is, 25 times or more the diameter of the wire rope. However, if the diameter of the equalizer sheave is 25 times or more than the diameter of the wire rope, the diameter of the equalizer sheave becomes too large and interferes with the structural members of the roof, making it difficult to fit it in an allowed space. Under these circumstances, there has been a demand for a compact means of ecological replacement for sheaves. Also, as the next issue,
If the wire rope is cut for any reason, or if the tension of the wire rope is lost due to an accident such as loosening of the clamp between the wire rope and the winding drum, the entire winch may be damaged. Since the load-carrying ability is lost, there is a problem in terms of safety when applied to equipment having a high possibility that a spectator will be on the lower side such as the roof of a building.

In order to avoid such a situation, it is not necessary to immediately lose 100% of the load-bearing capacity by cutting the wire rope, but to leave the load-bearing capacity to some extent and to make the equipment safe without danger to the audience. It was required to be able to move to the standby position.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has been made in consideration of the conventional problem, and a roof opening / closing device that opens and closes a roof with two wire ropes wound by a winch is made compact so as to be easily accommodated in a limited space. A roof opening / closing device having an eco-rise function, which is capable of adjusting the tension of two wire ropes, and in which even if one wire rope is cut, the cutting does not immediately lead to the loss of the load-carrying capacity of the winch. Is provided.

[0015]

The first invention of the present application relates to a roof opening / closing device for opening and closing a roof by simultaneously winding two wire ropes having the ends of the wire rope fixed on a movable roof with a single winch. A balance-like lever is pivotally attached to the movable roof, the ends of two wire ropes are fixed to both ends of the lever, and a lever stopper is provided near the lever to regulate the swing of the lever. It is characterized by having.

The second invention of the present application is a roof opening / closing device for opening and closing a roof by simultaneously winding two wire ropes having the ends of the wire rope on the movable roof with one winch. A moving arm is pivotally pivoted, and the pivot arm comprises an arm for fixing the end of the wire rope and an arm for pivotally connecting the connecting rod, and further provided with a stopper for regulating the pivot angle of the arm. It is characterized by the following.

The third invention of the present application is a roof opening / closing device that opens and closes a roof by simultaneously winding two wire ropes having the ends of the wire ropes on the movable roof with one winch. The levers are arranged at both ends of the shaft supported by the shaft so as to cancel the moment generated by the tension of the two wire ropes, and a rotation stopper that regulates the rotation angle of the shaft is provided. I do.

The fourth invention of the present application is directed to a roof opening / closing device for opening and closing a roof by simultaneously winding two wire ropes having the ends of the wire rope on a movable roof with one winch. The fixing device is characterized in that the ends are fixed via fixing means composed of an elastic body including a hydraulic cylinder, and the respective hydraulic cylinders are communicated by a communication pipe.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the first invention of the present application, the ends of two wire ropes can be engaged with both ends of a lever by supporting means having a spherical seat.

[0020]

Embodiment 1 FIG. 1 is an explanatory view showing a first embodiment of a roof opening / closing device according to the present invention, in which a winding drum 2 of a winch 1 is provided with two wire ropes 3.
One ends of a and 3b are fixed and held by clamp hardware 4a and 4b.

The other end of each of the wire ropes 3a and 3b is connected to a movable roof 7 via a lower sheave 5a and 5b and an upper sheave 6a and 6b, and is pivotally mounted on a movable roof 7 with a shaft. 9, supporting means 10a, 10b
Are engaged.

When the movable roof 7 is in a fixed position such as a fully open position, the lengths and tensions of the wire ropes 3a and 3b are adjusted so that the balance-like lever 9 is at a swing angle of zero, that is, a neutral position. Has been adjusted.

FIG. 2 is an enlarged plan view showing the vicinity of the balance-shaped lever 9 shown in FIG. 1. Wire ropes 3a and 3b are pinned by sockets 11a and 11b integrally fixed to respective ends. 12 is engaged with the supporting means 10a, 10b. Incidentally, the socket and the support means may be formed integrally.

The shaft 8 is provided with a movable roof side stopper 13 corresponding to a fixed roof side stopper 21 (see FIG. 13) provided on a fixed roof 58, and a lever stopper 14 for regulating the rotation of the lever 9 is provided. I have.

FIG. 3 shows the support means 10a, 1 shown in FIG.
In the enlarged view of the portion 0b, the support means 10a (10b) is composed of a fixing hardware 15, a spherical bush 16, a tension measuring device (load cell) 17, a seat plate 18, and a holding nut 19. The fixing hardware 15 is a socket 11a at one end.
(11b) is engaged with the pin 12, the other end is threaded, and after penetrating the end of the balance-like lever 9, the spherical bush 16, and the tension measuring device 17, the holding nut 19 is screwed.

In the above configuration, the wire ropes 3a,
When the tension 3b is wound on the winding drum 2 of the winch 1 to generate tension, the end of the balance-like lever 9 is connected to the wire ropes 3a, 3b.
Of the wire ropes 3a (or 3
b), the wire ropes 3a and 3a are inclined to lower the tension of the wire ropes, and the wire ropes 3b (or 3a) having a lower tension are pulled to increase the tensions. Balance 3b tension.

The tension of the two wire ropes 3a, 3b is
The tension is detected by each of the tension measuring devices 17 and controlled by a control device (not shown) so that the tensions borne by the other plural winches disposed on the openable roof are equalized.

Embodiment 2 FIG. 4 is an explanatory view showing a second embodiment of the roof opening / closing device according to the present invention. In FIG.
One ends of a and 3b are fixed and held by clamp hardware 4a and 4b. The other end of each of the wire ropes 3a, 3b is fixed to the eco-riser 20 disposed on the movable roof 7 via sockets 11a, 11b via lower sheaves 5a, 5b and upper sheaves 6a, 6b.

When the movable roof 7 is in the fully open position, for example, the movable roof-side stopper 13 with the built-in eco-riser 20 is connected to the fixed roof-side stopper 21 provided on the fixed roof structure via a buffer material. The movable roof 7 is supported by contact. In this state, the lengths and tensions of the wire ropes 3a and 3b are adjusted so that the equalizer 20 is in a neutral state. A trolley 22 that supports and moves the movable roof 7
Is guided on the rail 23.

FIG. 5 is an explanatory view of the equalizer, in which an equalizer 20 is disposed on a movable roof side stopper 13 integrally fixed to the movable roof 7. ECOLIZER 20
A pair of support frames 24 integrally provided on the movable roof-side stopper 13 and an arm stopper 25 formed integrally with the support frame 24;
It is composed of a shaft 27 that rotatably mounts and supports swing arms 26a and 26b provided with these arms. Each of the swing arms 26a and 26b has a wire rope 3
The ends of a and 3b are fixed via sockets 11a and 11b.

The arm stopper 25 is a swing arm 26
The wire rope 3b (or 3a) swings when the tension of one wire rope 3a (or 3b) is loosened or cut, and the other wire rope 3b (or 3a) swings. In order to maintain the tension of the other side of the wire rope 3b (or 3a) whose tension has not been relaxed by restricting the swing angle of the swing arm 26a (or 26b) when the arm 26a (or 26b) is drawn. Are located.

In this embodiment, the arm stopper 25 is L
Although the swing angle of one of the two arms in the shape of a letter is regulated, it is clear that the same effect can be obtained by regulating the swing angle of the other arm.

The swinging arms 26a and 26b are connected to each other by a connecting rod 28 whose distance can be adjusted, such as a turnbuckle, so that the tension of the two wire ropes 3a and 3b is equalized. ing.

The arm stopper 25 is provided with a contact detecting means 29 such as an electric detecting means such as a limit switch so that the contact state between the swing arms 26a and 26b and the arm stopper 25 is detected in advance. Is also good.

FIG. 6A is a view showing an example of a connection structure between the swing arms 26a and 26b, and FIG. 6B is an enlarged view of the connection portion. The tension of the two wire ropes 3b and 3b is measured by a tension measurement. The winch is controlled by a controller (not shown) detected by the device 30 so that the tensions of the winches are equalized.

In FIG. 6, instead of the connecting rod 28 in FIG. 5, a tension measuring device 1 such as a load cell is used.
7 and the connecting hardware 30 are incorporated, but the tension measuring device 17
Are not limited to the positions shown in the drawing, but the swing arms 26a, 26b and the sockets 11a, 11
The same effect can be obtained by incorporating it between b.

The tension measuring device 17 is pivotally attached to the swing arms 26a and 26b by connecting hardware 30 at both ends. The tension measuring device 17 includes a sensor 31 such as a frame 31 and a load cell.
2. It is composed of a seat plate 33, a holding nut 34, and a screw 35. The sensor 32 is pressurized by the frame 31 and the screw 35 receiving tension in opposite directions by a wire rope.

Embodiment 3 FIG. 7 is an explanatory view showing a third embodiment of the roof opening / closing device according to the present invention.
One ends of a and 3b are fixed and held by clamp hardware 4a and 4b. The other end of each of the wire ropes 3a, 3b is fixed to the eco-riser 20 disposed on the movable roof 7 via sockets 11a, 11b via lower sheaves 5a, 5b and upper sheaves 6a, 6b.

When the movable roof 7 is in the fully open position, for example, the movable roof-side stopper 13 incorporating the equalizer 20 is interposed between the fixed roof-side stopper 21 disposed on the fixed roof structure via a cushioning material. The movable roof 7 is supported by contact. In this state, the length and the tension of the wire ropes 3a and 3b are adjusted so that the equalizer 20 is in a neutral state. The carriage 22 that supports and moves the movable roof 7 includes:
It travels on the rail 23 and is guided.

FIG. 8 is a perspective view of the equalizer portion of FIG.
FIG. 9 is a plan view of the same, in which the movable roof-side stopper 13 integrally fixed to the structural member of the movable roof 7 has an equalizer 20.
Are arranged. The equalizer 20 includes a bearing block 36, a shaft 37, and a bearing 3 that rotatably support the shaft 37, which are integrally provided through the movable roof-side stopper 13.
8, a support portion comprising a bearing 38 and a holding hardware 39 for holding an oil seal (not shown), a rotation stopper 41 fixed to the shaft 37 by a holding means 40 such as a key, and a part of the rotation stopper 41 are formed. Striker 4
2. A rotation angle restricting portion composed of a pair of limit plates 43 protruding from the movable roof side stopper 13, a lever 45 fixed to the shaft 37 by holding means 44 such as a key, and the lever 45. Sockets 11a and 11
and a fixing unit composed of a pin 46 on which b is mounted.

The limit plate 43 is provided for the purpose of restricting the swing angle of the lever 45. When the tension of one of the wire ropes is loosened, the other wire rope is connected to the lever 45.
Is provided in order to maintain the wire rope tension on the other side where the tension has not been relaxed by restricting the swing angle of the lever 45 when drawing the wire rope.

Fourth Embodiment FIG. 10 is an explanatory view showing a fourth embodiment of the roof opening / closing device according to the present invention.
One ends of a and 3b are fixed and held by clamp hardware 4a and 4b. The other end of each of the wire ropes 3a, 3b passes through lower sheaves 5a, 5b and upper sheaves 6a, 6b, and is a turning sheave 47 pivotally mounted by a shaft 46 disposed on the movable roof 7. Through the fixing means 47
a and 47b are attached to a bracket 49 provided integrally with the movable roof 7 with a pin 48 via a pin 47.

When the movable roof 7 is at a fixed position such as a fully opened position at the time of adjustment, the allowable displacement amount of the fixing means 47a, 47b, that is, the hydraulic cylinders 50a, 50b (FIG. 1)
1, see FIG. 12), the length and tension of each wire rope 3b, 3b are adjusted so that the movable stroke is appropriate.

FIG. 11 is an enlarged plan view of the vicinity of the fixing means 47a and 47b. The wire ropes 3b and 3b are fixed to the respective ends by sockets 11a and 11b and fixed by pins 51 to the fixing means 47a and 47b. Is engaged.

FIG. 12 is an enlarged view of the fixing means 47a and 47b.
Fixing frame 53, hydraulic cylinders 50a and 50b, hydraulic cylinder 50 incorporated between fixing frame 52 and fixing frame 53
a, 50b and restoring means 5 made of an elastic material such as rubber or a spring incorporated between the fixing frames 52 and 53.
4. A connecting pipe 55 for communicating the two hydraulic cylinders 50a and 50b incorporated in the fixing means 47a and 47b, and a pressure constituting a part of the wire rope tension measuring means disposed in the middle of the connecting pipe 55. It comprises a detecting means 56.

When the wire ropes 3a and 3b are wound on the winding drum 2 of the winch 1 to generate tension, the wire rope 3a
a, 3b compress the hydraulic cylinders 50a, 50b against the repulsive force of the restoring means 54 to pull the fixing frame 52;
The hydraulic oil filled in the hydraulic cylinders 50a and 50b is about to be pushed out to the connecting pipe 55. Two wire ropes 3
When the tensions of a and 3b are substantially equal, the hydraulic oil does not move because the pressures of the two cylinders are balanced in the communication pipe 55.

If a tension difference occurs between the two wire ropes 3a and 3b, the hydraulic cylinder on the higher tension side is compressed and the pressure of the hydraulic oil inside increases, so that the pressures of both hydraulic cylinders are equalized. The hydraulic oil moves through the communication pipe 55 toward the hydraulic cylinder on the lower tension side. Then, the tension of the two wire ropes is balanced by energizing the hydraulic cylinder of the lower tension side to the repulsive force of the restoring means 54 to extend and pull the wire rope of the lower tension side to increase the tension. . Since the tension of the two wire ropes 3a and 3b can be known by measuring the pressure of the hydraulic oil in the communication pipe 55 by the pressure measuring means 56, the tension borne by the plurality of winches by the control device is equal. Is controlled so that

[0048]

According to the present invention, the length of the balance-like lever, the second member which is the main member constituting the equalizer,
Since the length of the arm in the invention and the length of the lever in the third invention can be set irrespective of the wire rope diameter, the structure can be made more compact as compared with the conventional equalizer sheave system.
Therefore, it can be installed even in a limited space of the roof structure.

Further, since no bending acts on the wire rope, the life of the wire rope is not adversely affected. For this reason,
Equipment maintenance costs can be reduced, and equipment is often installed in places where daily access is difficult,
Prolonging the life of the wire rope has a great effect on safety and maintenance cost.

Further, since the two wire ropes are divided and independent, even if one of the wire ropes is cut, the load-carrying capacity of the winch hardly changes for a short time. In other words, although the safety factor is halved, the transition to the standby state can be completed without dropping or running away of the equipment, so that safe equipment can be realized.

According to the fourth aspect, since the tension equalizing means can be incorporated after turning in the opposite direction where the space is relatively large by the guiding means, it is forcibly arranged in a narrow space between the two wire ropes. This eliminates the necessity and increases the degree of freedom of application. In the case of a fan-shaped sheave, the diameter of the turning sheave can be 25 times as large as the diameter of the wire rope, so that the life of the wire rope is not adversely affected.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of a roof opening / closing device of the present invention.

FIG. 2 is an enlarged plan view showing the vicinity of a balance-like lever 9 shown in FIG.

FIG. 3 is an enlarged view of a support means 10a, 10b shown in FIG.

FIG. 4 is an explanatory view showing a second embodiment of the roof opening / closing device of the present invention.

FIG. 5 is an explanatory view of the equalizer of the second embodiment shown in FIG.

FIG. 6A is a diagram showing an example of a coupling structure between swing arms 26a and 26b, and FIG. 6B is an enlarged view of a coupling portion.

FIG. 7 is an explanatory view showing a third embodiment of the roof opening / closing device of the present invention.

FIG. 8 is a perspective view of an equalizer portion of FIG. 7;

FIG. 9 is a plan view of the equalizer portion of FIG. 7;

FIG. 10 is an explanatory view showing a fourth embodiment of the roof opening / closing device of the present invention.

FIG. 11 is an enlarged plan view of the vicinity of fixing units 47a and 47b.

FIG. 12 is an enlarged view of a fixing unit 47a, 47b.

FIG. 13 is a schematic plan view of a building provided with a roof opening / closing device using a winch.

FIG. 14 is a schematic sectional view showing a fully open state and a fully closed state of the roof.

FIG. 15 is a view showing a conventional combination pulley.

FIG. 16 is an explanatory view of a roof opening / closing device using a conventional combination pulley.

[Explanation of symbols]

Reference Signs List 1 winch 2 winding cylinder 3a, 3b wire rope 4a, 4b clamp hardware 5a, 5b lower sheave 6a, 6b upper sheave 7 movable roof 8
Shaft 9 Lever 10a, 10b Supporting means 11a, 11b Socket 12 Pin 13 Movable roof side stopper 14 Reversing stopper 15 Fixing hardware 16 Spherical bush 17
Tension measuring device 18 Seat plate 19 Holding nut 20 Equalizer 21 Fixed roof side stopper 22 Cart 2
3 rail 24 support frame 25 arm stopper 26a, 26b swing arm 27 axis 28
Connecting rod 29 contact detecting means 30 connecting hardware 31
Frame 32 Sensor 33 Seat plate 34 Holding nut 35 Screw 36 Bearing block 37
Shaft 38 Bearing 39 Holding hardware 40 Holding means 41 Rotation stopper 42 Striker 43 Limit plate
44 Holding means 45 Lever 46 Shaft 47 Turning sheave 47a, 47b Fixing means 48 Pin 49
Bracket 50a, 50b Hydraulic cylinder 51 pin
52 Fixing frame 53 Fixing frame 54 Restoring means 55 Communication pipe 56 Pressure detecting means 57 Opening section 58
Fixed roof 59 Ground pit 60 Guide sheave 61
Moving pulley A group 62 Constant pulley 63 Equalizer sheave 6
4 Movable pulley B group 65 Structure 66 Hook 67 Block

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeyuki Uchiyama 46-59 Nakahara, Tobata-ku, Kitakyushu-shi Inside Nippon Steel Corporation Engineering Business Unit (72) Inventor Saburo Kato 46-59, Nakahara, Tobata-ku, Kitakyushu New Nippon Steel Corporation Engineering Division (72) Inventor Takayoshi Soma 2-3 Chikushinmachi, Sakai City, Osaka Prefecture Yokogawa Bridge Construction Division Engineering Department (72) Inventor Hiromine Iwamori 46-46 Nakahara, Tobata-ku, Kitakyushu-shi 59 Inside Nippon Steel Corporation Engineering Division

Claims (7)

[Claims] 1. A roof opening / closing device that opens and closes a roof by simultaneously winding two wire ropes having the ends of the wire ropes on the movable roof with a single winch, wherein a balance-like lever swings on the movable roof. A roof opening / closing device, which is freely pivotally mounted, and the ends of two wire ropes are fixed to both ends of the lever, and a lever stopper is provided in the vicinity of the lever to regulate swing of the lever. . 2. The roof opening / closing device according to claim 1, further comprising contact detection means for detecting contact between the lever and the lever stopper. 3. A roof opening / closing device for opening and closing a roof by simultaneously winding two wire ropes having the ends of the wire rope on the movable roof with one winch, wherein a pair of swing arms swing on the movable roof. It is movably pivoted, and the swing arm is composed of an arm that fixes the end of the wire rope and an arm that attaches the connecting rod, and a stopper that regulates the swing angle of the arm is provided. Roof opening and closing device. 4. The roof opening / closing device according to claim 3, further comprising contact detection means for detecting contact between the arm and the stopper. 5. The roof opening / closing device according to claim 3, wherein a tension measuring device is provided on the connecting rod. 6. A roof opening / closing device that opens and closes a roof by simultaneously winding two wire ropes having the ends of the wire rope on the movable roof with one winch, and is rotatably supported by the movable roof. A roof opening / closing device, wherein each lever is arranged at both ends of a shaft so as to cancel a moment generated by a tension of two wire ropes, and a rotation stopper for regulating a rotation angle of the shaft is provided. . 7. A roof opening / closing device for opening and closing a roof by simultaneously winding two wire ropes having the ends of the wire ropes on a movable roof with one winch, wherein hydraulic pressure is applied between the movable roof and the ends of the wire ropes. An opening / closing drive device, wherein fixing is performed via fixing means composed of an elastic body including a cylinder, and each hydraulic cylinder is communicated by a communication pipe.