JPH0998855A - Safety device in display case with lifting panel - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To prevent a falling of an elevating panel, and to move the panel if an abnormal load is applied to the rope due to an overload on the elevating panel during vertical movement. It is an object to provide a safety device for stopping a vehicle. SOLUTION: In a display case with a lifting panel, which is hung by a cord on a front surface of a front plate G of the display case, and can be lifted and fixed at a desired vertical position, the back surface of the panel 3 is provided. A fall prevention rail 4 is provided, and a chuck device 10 that can hold and release the rail 4 on the display case main body 1 is connected to the chuck device 10 and is attached to the rope. The movable lever 6 is provided so as to support the load and move according to the variation, and the movable lever 6 is provided when the load variation when the panel is raised or lowered is on the reduced load side.
Moves the chuck device 10 so as to operate it on the rail holding side, and when the load fluctuation is on the applied side, it moves so as to stop the lifting drive source of the panel 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an exhibition case of a museum, etc.
In an exhibition case with an elevating panel equipped with an elevating panel that moves up and down as necessary, the elevating panel is prevented from falling, and if the elevating panel is vertically moved, if the panel is overloaded, the movement is stopped. Safety device.

[0002]

2. Description of the Related Art In an exhibition case of a museum or the like, an elevating panel is installed on the front upper part of the display case in order to obtain an optimal exhibition effect, and when there is an exhibit, the panel is raised to an optimal vertical position. Therefore, the visitors can observe the exhibit well, and when there is no exhibit, the panel is lowered so that the display case can be hidden.

The elevator panel has a very large width and an extremely heavy weight. For raising and lowering, that is, vertical movement, a wire rope or a chain is usually used to wind up a cord. Since it is done by rewinding, there is no possibility of accidents such as cutting of ropes and accidents that the panel is overloaded during vertical movement of the lifting panel and the movement is not performed smoothly. However, if such an accident occurs, it may result in personal injury.

[0004]

SUMMARY OF THE INVENTION From the above-mentioned viewpoints, the present invention is to prevent falling of an elevating panel in an exhibition case with an elevating panel, or to overload the elevating panel during vertical movement. It is an object of the present invention to provide a safety device that stops the movement of the panel when an abnormal load is applied to the rope due to a cause such as a load.

[0005]

The structure of the safety device of the present invention, which has been made for the purpose of solving the above-mentioned problems, is designed so that it can be lifted up and down by a rope to the front of the front plate of the display case and can be moved up and down as desired. In an exhibition case with a lifting panel that can be fixed in the vertical position, a fall prevention layer is provided on the back surface of the panel.
And a chuck device capable of holding and releasing the rail on the main body of the display case and connected to the chuck device and supporting a load applied to the rope and responding to its variation. A movable lever formed so as to move is provided, and when the load fluctuation at the time of raising / lowering the panel is on the reduced load side, the movable lever moves so as to operate the chuck device on the rail holding side, and the load fluctuation occurs. On the load side, the lifting drive source of the panel is moved to the side to be stopped. Another structure for achieving the above-mentioned object is a display case with a lifting panel, which is hung on a front surface of a front plate of the display case and can be lifted and fixed at a desired vertical position. -In the case, a fall prevention rail is provided on the back surface of the panel and the display case is displayed.
While the chuck body is provided with a chuck device capable of holding and releasing the fall prevention rail, a lever body supported on a top plate of the case body or in the vicinity thereof by a support shaft so as to be capable of swinging back and forth. The load applied to the panel by advancing and retracting the rope on the tip side of the lever body is supported and guided, and a force smaller than the load applied by the panel is applied to the rear end side of the lever body. Movable lever acted in the opposite direction
And the movable lever is connected to the chuck device via a connecting member, and when the rope is cut while the panel is being raised or lowered, the rear end side of the movable lever acts on it. The chuck device is pushed down by a force to cause the chuck device to perform a panel drop prevention operation.

In the above-mentioned display case, an abnormal load is applied to a rope such as a rope due to an overload on the panel when the panel is raised, and the movable lever is moved.
If oscillates in the opposite direction to the cutting of the cord, the limit switch or the like detects this and stops the operation of the winch or the like, so that the cord can be prevented from being cut.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of a safety device in an exhibition case with a lifting panel according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG.
FIG. 4 is a front view of the chuck device, and FIG. 4 is a diagram showing a state in which the panel fall prevention rail is held by the chuck device.

In the figure, 1 is a case body of the display case, G is a transparent front plate, 2 is a guide rail attached to the front surface of the case body 3, and 3 is the guide rail 2. A panel that guides the user to move up and down.
4 is attached. Reference numeral 5 denotes a support shaft parallel to the panel 3 provided on the top plate of the case body 1, and 6 denotes the support shaft 5 and the shaft 5 thereof.
Is a movable lever mounted so as to be swingable about the left and right (front and rear of the case body). The lever 6 is provided at its rear end side by a spring 19 provided on a bracket 17 described later via a movable shaft 18. It is formed so that a downward force is always applied. The repulsive force of the spring 19 is smaller than the load applied to the tip side of the movable lever 6, and therefore the swingable lever 6 rotates counterclockwise depending on the normal load applied to the tip side of the panel 3 by the panel 3. It is positioned by the movable shaft 18 so as not to do so. That is, the lever 6 is prevented from rotating counterclockwise about the support shaft 5 against a normal load applied by the panel 3 applied to the front end side of the shaft 5 of the movable lever 6.
Repelling force of spring 19 and load by panel 3, and movable shaft 18
The lower end position 18b of the is adjusted by the adjusting nut 18a.

Reference numeral 7 is a pulley attached to the tip end of the movable lever 6 as an example of a relay wheel, and 8 is a rope as a cord in which the tip end is fixed to the upper surface of the panel 3 through the pulley 7.
Reference numeral 9 denotes a connecting rod whose upper end is pivotally attached to the rear end side of the movable lever 6 and whose lower end is associated with the chuck device 10. The connecting rod 9 has a front end side of the movable lever 6. When the load applied to the spring becomes smaller than the force of the spring 19, this lever
The downward force of the spring 9 acting downwardly on the rear end side of the spring 6 is transmitted. Each member from the guide rail 2 to the connecting rod 9 is a single panel 3
It has been arranged so that two of each can be balanced on the left and right. If the rope is a belt or chain, use a pulley or sprocket that fits the relay wheel.

The chuck device 10 is for preventing the panel 3 from falling and is attached to the case main body 1 and has the following structure. That is, 11 is a case of the chuck device 10, 12 and 12 'are pinions rotatably attached to the case 11, and 13 is a vertically movable rack that meshes with the pinions 12 and 12'. A mounting shaft 14 is connected to the connecting rod 9 and is urged downward in a case 11 by a spring 15. Numerals 16 and 16 'are cams attached to the shafts of the pinions 12 and 12' in a state of being eccentrically spaced apart from their front sides, and are positioned so as to sandwich the fall prevention rail 4 of the panel 3.

As shown in FIG. 1, when the rope 8 is cut while the panel 3 is suspended, the movable lever is moved.
Since the load applied to the tip end side of 6 is instantly reduced, it is rotated clockwise about the support shaft 5 by the action of the spring 19, and the connecting rod 9 is lowered by the rotation of this movable lever 6. Then, the chuck device 10 is attached via the mounting shaft 14.
Lower the rack 13 inside. When the rack 13 descends, the pinion 12 meshing with the rack 13 rotates clockwise, and the pinion 12 'rotates counterclockwise, and the cams attached to the racks 12 and 12' are integrally eccentrically mounted. 16 and 16 'rotate to narrow the gap between them and firmly hold the fall prevention rail 4 of the panel 3 to prevent the panel 3 from falling.

Reference numeral 17 denotes a bracket fixed on the top plate of the casing body 1 so that its constituent portion 17a is located above the rear end side of the movable lever 6, and 18 is a constituent portion 17a of the bracket 17. A bolt rod-shaped movable shaft that is vertically installed so that the upper and lower positions can be adjusted by an adjusting nut 18a, 19 is a spring supported by the shaft 18, and the movable shaft 18 is formed by the bracket 17 and a spring.
The flat surface 6'on the rear end side of the movable lever 6 is normally supported by the spring 19 whose spring force can be adjusted by the nut 18a.
The pressing force is applied to the rear end of the lever 6 in contact with the lower end 18b, and the lower end 18b is positioned at this position by the nut 18a. Reference numeral 20 denotes a limit switch which is attached to the case main body 1 and detects the counterclockwise rotation of the rear end of the movable lever 6, and each member from the bracket 17 to the limit switch 20 is the panel 3 When there is an obstacle during movement or an abnormality occurs in the guide rail 2 and the panel 3 is overloaded and an abnormal load is applied to the rope 8, it is detected to ensure safety. It is for.

Reference numeral 21 is an electric winch motor, and 22 is the rotor.
A drum for fixing the end portion of the loop 8 to wind and rewind the rope by driving the motor 21, 23 is a pulley for guiding the rope 8, and the limit switch 20 is In connection with the motor 21, when the above abnormal load situation occurs, it is detected to generate an electric signal, and the electric signal causes the motor 21 to stop instantaneously.

That is, when the above-mentioned abnormal situation occurs and an abnormal load is applied to the rope 8, the movable lever 6 resists the repulsive force of the spring 19 and moves the movable shaft 18 upward while the support shaft 5 moves. Since it rotates counterclockwise about the axis, the limit switch 20 detects this rotation, and when the switch 20 detects the rotation, an electric signal is issued to stop the rotation of the motor 21 instantaneously, and the panel The movement of 3 is stopped. By doing so, the disconnection of the rope 8 can be prevented. The repulsive force of the spring 19 can be adjusted by adjusting the adjusting nut 18a provided on the movable shaft 18 to adjust the set value of the overload.

[0015]

The present invention is as described above, and the front plate, which is the display surface of the display case, is opened to the optimum state,
A device with a very simple structure in which an elevating panel suspended by ropes such as ropes, which hides the display case when it is not used, falls when the ropes such as ropes are cut. In addition, it is possible to prevent the motor such as an electric winch that winds up and rewinds the rope when the overload is applied to the rope, so that the motor can be stopped instantly.
It is suitable as a safety device for display cases with lifting panels.

[Brief description of drawings]

FIG. 1 is a perspective view of a safety device in an exhibition case with a lifting panel according to the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view in which a cam of a chuck device is omitted.

FIG. 4 is a front view showing a state in which a panel fall prevention rail is held by a cam of a chuck device.

FIG. 5 is a perspective view of a main part showing a relationship between a movable lever and a movable shaft.

[Explanation of symbols]

 1 Case Main Body G Case Front Plate 2 Guide Rail 3 Panel 4 Fall Prevention Rail 5 Support Shaft 6 Movable Lever 7 Pulley 8 Rope 9 Connecting Rod 10 Chuck Device 11 Chuck Device Case 12, 12 'Pinion 13 Rack 15 Spring 16, 16' Cam 17 Bracket 18 Movable shaft 18a Adjusting nut 18b Lower end of movable shaft 19 Spring 20 Limit switch 21 Motor for winch 22 Roll-up / rewind drum

Claims (4)

[Claims] 1. An exhibition case with a lifting panel, which is hung on a front surface of a front plate of a display case by a cord so that it can be lifted and fixed at a desired vertical position, on the back surface of the panel. A fall prevention rail is provided, and a chuck device capable of holding and releasing the rail on the main body of the display case is connected to the chuck device and supports a load applied to the rope. A movable lever formed so as to move according to fluctuations is provided, and when the load fluctuation when the panel is raised or lowered is on the reduced load side, the movable lever moves so as to operate the chuck device on the rail holding side. A safety device in an exhibition case with a lifting panel, wherein when the load fluctuation is on the applied side, the lifting drive source of the panel is moved to a side to be stopped. 2. A display case with a lifting panel, which can be lifted up and down by a cord and fixed at a desired vertical position on the front surface of the front plate of the display case, on the back surface of the panel. While a fall prevention rail is provided and a chuck device that can hold and release the fall prevention rail is provided on the main body of the display case, a spindle is provided on or near the top plate of the case body. A lever body supported by the lever body so as to be swingable back and forth by supporting and guiding the load of the panel applied by the forward and backward movement of the rope at the tip end side of the lever body and the panel at the rear end side of the lever body. The movable lever is provided with a force smaller than the load exerted in the opposite direction to the tip side, and the movable lever is connected to the chuck device via a connecting member, and the cord is the panel. Disconnect when raising and lowering Then, the rear end side of the movable lever is pushed down by the force acting on the movable lever so that the chuck device operates to prevent the panel from falling. The safety device in the display case with the lifting panel. . 3. An exhibition case with a lifting panel, which is hung from a front surface of a front plate of the display case by a cord so that it can be lifted and fixed at a desired vertical position. A lever body supported by a support shaft so as to be able to swing back and forth at an appropriate position such as on the top plate of the main body, and supports the load of the panel applied by the forward and backward movement of the rope at the tip end side of the lever body. The movable lever is provided on the rear end side of the lever body in which a force smaller than the load applied by the panel is applied in the opposite direction to the tip side, and the rope raises and lowers the panel by the power of a winch or the like. If an abnormal load is applied to the rope while it is being moved, the rear end side of the movable lever swings against the force acting on it, which is detected by a limit switch or the like, and the operation of the winch or the like is prevented. Characterized by stopping Safety device for display cases with lifting panels. 4. A safety device in an exhibition case with a lifting panel, comprising the safety device according to claim 2 and the safety device according to claim 3.