KR101583530B1 - Safety device of slide device - Google Patents

Abstract

The present invention relates to a safety device used in a slide device comprising a fixed slide and at least one of subslides formed as foldable to vary the length in the upper part of the fixed slide. The present invention further comprises a body which is installed on the fixed slide and in which a receiving part is formed; an elastic spring which is installed on the receiving part and causes restoring force in a direction opposite to the body; and a fixing part fixing the subslide formed in the mounting part on the fixed slide where the body is attached by being moved to a mounting part formed in the subslide by the elastic spring. Even when hydraulic and pneumatic systems do not work in an elastic process of the subslides existing in the fixed slide by a pressure piston, the fixing part receives the restoring force of the elastic spring and then is mounted on the mounting part, thereby fixing the subslide without a slip.

Description

[0001] SAFETY DEVICE OF SLIDE DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a slide device, and more particularly, to a safety device for a slide device which can prevent an accident by fixing a sub slide SLIDE to a fixed slide when a failure occurs in a multi- To a safety device of the present invention.

Slide devices mounted on vehicles where fire trucks and workers are up and working can be moved up and down by the force of hydraulic or pneumatic pistons.

Such a hydraulic or pneumatic slide apparatus can fix the slide apparatus by a hydraulic or pneumatic force. However, if the hydraulic or pneumatic system fails, the slide apparatus can slip without leading to a load, leading to a serious accident .

Korean Patent Registration No. 10-0875145 discloses a multistage elevator ladder device in which a stopper is raised or lowered with respect to a fixed shaft by the operation of a cylinder for a trap stopper, A stopper device is proposed.

The boom shut-off stopper device configured in this way has a problem in that it can not operate if the hydraulic system fails.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type slide type And a safety device for the slide device.

In order to solve the above problems, the present invention is applied to a slide device having a fixed slide and at least one sub-slide (SLIDE) formed so as to be slidable over the fixed slide (SLIDE) A body provided on the fixed slide and having a receiving portion inside; An elastic spring installed in the receiving portion to generate a restoring force in a direction opposite to the body; And a fixing unit moving to a seating part formed on the sub slide by the elastic spring and fixing the sub slide formed on the seating part to the fixed slide with the body attached thereto have.

The safety device of the slide device may further include a control part which is disposed in the receiving part and contacts the elastic spring, and the other part protrudes outward from the body to adjust the restoring force of the elastic spring.

The safety device of the slide device may include a first pressure plate having one surface formed to correspond to the fixed portion and the other surface contacting the one side of the elastic spring to uniformly transmit the restoring force of the elastic spring to the fixed portion, And a second pressure plate which is in contact with the other side of the spring and is in contact with the regulating part on the other side to uniformly transmit the pressure of the regulating part to the elastic spring.

The safety device of the slide device includes a motor connected to the control unit to move the control unit forward or backward; And a controller for controlling the motor.

The safety device for a slide device may further include at least one pressure sensor for detecting a hydraulic or pneumatic pressure of the pressure piston and sending a signal to the control unit when the sub slide is expanded or contracted by a pressure piston using hydraulic pressure or pneumatic pressure, Wherein the control unit operates the motor to move the fixing unit forward when the hydraulic pressure or the pneumatic pressure of the pressure piston is not sensed or the hydraulic pressure or the pneumatic pressure falls below a reference hydraulic pressure value or a pneumatic pressure value set in the pressure sensor, When the hydraulic pressure or the pneumatic pressure of the motor reaches the set reference hydraulic pressure value or the pneumatic pressure value, the motor can be operated to reverse the fixing portion.

The safety device of the slide device is fixed to the stationary slide or the sub-slide, and includes a cylinder portion accommodating the body and reciprocating the body by the motor. And at least one motion detection sensor installed in the cylinder and stopping the operation of the motor when the body is positioned at a predetermined position.

A solenoid valve formed in a pressure piston for raising or lowering the sub-slide, the solenoid valve being opened or closed to selectively supply hydraulic pressure or pneumatic pressure to the pressure piston pressure line and the pressure piston pressure line of the pressure piston; A pressure supply line connected to the solenoid valve to supply hydraulic or pneumatic pressure to the body side; And a pressure discharge line through which the hydraulic or pneumatic pressure discharged from the body is discharged. The body may be formed with a tapered passage formed by opening one side to be connected to the pressure supply line.

When the pressure piston rises or falls, the fixing part is moved in the direction of the elastic spring when the hydraulic pressure or the pneumatic pressure flows into the accommodation part through the pressure path, When the operation of the pressure piston is stopped, the hydraulic or pneumatic pressure introduced into the receiving portion is discharged to the solenoid valve, and the fixing portion can be moved to the sub slide side by the restoring force of the elastic spring.

The fixing portion may be formed of any one of a ball shape, a cylindrical shape, a bolt shape, and a polygonal bar shape.

The ends of the fixing portion formed in the shape of the cylinder, the bolt, and the polygonal bar may be inclined or hemispherical in one direction.

The safety device of the slide device according to the embodiment of the present invention is mounted on the fixed slide SLIDE and the sub slide SLIDE of the slide device and operates when the hydraulic or pneumatic device fails to prevent the sub slide SLIDE from slipping .

Further, the safety device of the slide device according to the embodiment of the present invention is formed so that the fixing part of the safety device slips when the hydraulic or pneumatic cylinder operates normally, so that breakage of the safety device can be prevented.

Further, since the safety device of the slide device according to the embodiment of the present invention is formed such that the fixing part of the safety device slips when the hydraulic or pneumatic cylinder operates normally, it is advantageous to reduce wear on the seat part formed on the sub slide or the top slide have.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view schematically showing a slide device equipped with a safety device of a slide device according to a first embodiment of the present invention; Fig.
FIG. 2 is a sectional view showing a safety device section of the slide device shown in FIG. 1. FIG.
3 is a side view schematically showing a state in which the safety device of the slide device shown in FIG. 2 is mounted on the multi-stage slide.
FIG. 4 is a side view showing a process of operating the safety device of the slide device shown in FIG. 3;
5 is a sectional view showing a safety device of the slide device according to the second embodiment;
6 is a sectional view showing a safety device of the slide device according to the third embodiment;
7 is a sectional view showing a safety device of a slide device according to a fourth embodiment;
8 is a sectional view showing a safety device of the slide device according to the fifth embodiment;
9 is a view schematically showing a solenoid valve formed in a piston.
Fig. 10 is a view showing a case where the fixing part of the safety device of the slide device shown in Fig. 8 is detached from the sub slide. Fig.
FIG. 11 is a side view showing a state in which a fixing part of the safety device of the slide device shown in FIG. 8 is moved to the sub slide.
FIG. 12 and FIG. 13 are cross-sectional views respectively showing other forms of the fixing portion provided in the safety device of the slide device shown in FIG. 1. FIG.

Hereinafter, the description of the present invention with reference to the drawings is not limited to a specific embodiment, and various transformations can be applied and various embodiments can be made. It is to be understood that the following description covers all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description, the terms first, second, and the like are used to describe various components and are not limited to their own meaning, and are used only for the purpose of distinguishing one component from another component.

Like reference numerals used throughout the specification denote like elements.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms " comprising, "" comprising, "or" having ", and the like are intended to designate the presence of stated features, integers, And should not be construed to preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 13 attached herewith.

FIG. 1 is a view schematically showing a slide device equipped with a safety device of a slide device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing a safety device section of the slide device shown in FIG. 1, FIG. 3 is a side view schematically showing a state where the safety device of the slide device shown in FIG. 2 is mounted on the multi-stage slide.

 1 to 3, the slide device includes slide slides 130 driven by a pressure piston 140 driven by hydraulic pressure or pneumatic pressure, and is provided with sliding slides 130 May be expanded or contracted by the user. At this time, the safety device of the slide device operates when the folded sub-slides 130 are expanded and contracted by the pressure piston 140, so that the safety of the slide device formed on the sub-slides 130, even if the hydraulic system or the hydraulic pipe fails It can be fixed without being slip by the apparatus.

The safety device 100 may be attached to the stationary slide 110 and the sub-slides 130. At this time, the safety device 100 may be attached to all of the sub-slides 130 except the uppermost sub-slide.

Specifically, the safety device 100 of the slide device may include a body 200, an elastic spring 220, a fixing portion 230, and a receiving portion 210.

The body 200 may be formed in a cylindrical shape. The body 200 may include a receiving portion 210.

The receiving portion 210 is an empty space in which the fixing portion 230 and the elastic spring 220 can be housed. The receiving portion 210 may have a cylindrical shape or a polygonal cross-section.

The resilient spring 220 can provide a restoring force to the fixing portion 230. That is, when the elastic spring 220 is compressed, a repulsive force or restoring force acts in the opposite direction. The resilient spring 220 is accommodated in the receiving portion 210 to exert a restoring force for pushing the fixing portion 230 in the direction opposite to the body 200.

In FIGS. 1 to 3, the elastic spring 220 is formed as a coil spring, but a plate or a disc spring may be used as shown in FIG.

The fixing part 230 is arranged to contact one end of the elastic spring 220 and reciprocates inside the accommodating part 210. The fixing part 230 may be inserted into the seating part 240 formed on the sub-slides 130 according to the action of the elastic spring 220. The fixing part 230 may be formed so that one side is housed in the receiving part 210 and the other side is protruded to the outside of the safety device 100.

The fixing portion 230 may be formed in a spherical shape as shown in FIG. The fixing part 230 is formed in a spherical shape so that when the sub slide 120 is moved up or down by the pressure piston 140, the sub slide 120 can be rotated by the rotation. At this time, it is preferable that the pressure applied to the sub slide 120 is such that the fixing part 230 can release the seat part 240.

Here, the seating part 240 is formed on each of the sub-slides 130 so that the fixing part 230 is seated. At least one of the seating portions 240 may be formed on one side of the sub-slide 120. The seating part 240 may be formed in a shape corresponding to the external shape of the fixing part 230 so that a part of the fixing part 230 is inserted into the shape corresponding to the fixing part 230. [ The seating part 240 may be formed as a groove having a predetermined depth.

FIG. 4 is a side view showing a process of operating the safety device of the slide device shown in FIG.

4, in the safety device of the slide device, when the sub-slides 130 are lifted up, the fixing part 230 moves in close contact with one surface of the sub-slide 120, So that the restoring force is increased. When the sub-slide 120 moves upward or downward and the fixing portion 230 is positioned at the seating portion 240, the sub-slide 120 is moved to the fixed slide 110 or another sub- The position is fixed to the slide 120. [ Accordingly, when the hydraulic system or the pneumatic system and the hydraulic piping or the pneumatic piping fail, the sub-slides 130 are fixed to the fixed slide 110 to prevent the accident.

5 is a sectional view showing a safety device of the slide device according to the second embodiment.

5 is a plan view of the body 200 in which the first pressing plate 260, the second pressing plate 270, and the adjusting unit 250 are added to the receiving portion 210 of the body 200, ≪ / RTI > Therefore, the same reference numerals are given to the same constituent elements, and redundant description of the same constituent elements is omitted, and the added constituent elements will be mainly described.

5, a safety device for a slide device according to a second embodiment of the present invention includes a body 200, a first pressure plate 260, a second pressure plate 270, an elastic spring 220, a fixing portion 230 A seat portion 240, and an adjusting portion 250. [0033]

The body 200, the resilient spring 220, the fixing part 230, and the seating part 240 are the same components as those of FIG. 2, and thus a duplicate description will be omitted.

Specifically, the adjustment unit 250 can adjust the restoring force of the elastic spring 220. The adjustment portion 250 may be formed in a direction opposite to the fixing portion 230. The adjusting unit 250 may have one end housed in the receiving part 210 and the other end protruding toward the outside of the body 200. The adjuster 250 may be attached to and detached from the body 200 by a screw fastening method. The restoring force of the resilient spring 220 is increased when the regulating unit 250 is advanced to the inside of the body 200 and the restoring force is decreased when the resilient spring 220 is moved backward to the outside of the body 200. Thus, the holding force of the fixing part 230 fixed to the seat part 240 can be changed.

The adjusting part 250 may include a coupling groove 251 having a hexagonal shape, a cross shape, a straight shape, a square shape or the like on one end surface protruding outwardly of the body 200. The engaging groove 251 can be fastened to a tool such as a hexagonal wrench, a phillips screwdriver, a flat screwdriver or the like.

The first pressure plate 260 may be formed between the fixing portion 230 and the elastic spring 220. The first pressure plate 260 can evenly transmit the pressure of the elastic spring 220 to the fixing portion 230. The first pressure plate 260 may have a groove or the like formed on the surface of the first pressure plate 260 which is in close contact with the fixing portion 230 to correspond to the outer shape of the fixing portion 230. The first pressure plate 260 is formed flat so as to be in contact with the elastic spring 220 so that the pressure provided from the elastic spring 220 can be uniformly transmitted to the fixing portion 230.

Meanwhile, the safety device 100 of the slide device according to the embodiment of the present invention may further include a second pressure plate 270. The second pressure plate 270 may be formed between the elastic spring 220 and the adjuster 250 to uniformly transmit the pressure applied by the adjuster 250 to the elastic spring 220.

6 is a cross-sectional view showing a safety device of the slide device according to the third embodiment.

6, a safety ladder safety apparatus 100 according to a third embodiment of the present invention includes a diaphragm spring 222, a motor 280, a pressure sensor (not shown) and a control unit (not shown) The same elements are included. Therefore, the same reference numerals are given to the same constituent elements, and redundant description of the same constituent elements is omitted, and the added constituent elements will be mainly described.

Referring to FIG. 6, a safety device 100 of a slide device according to a third embodiment of the present invention includes a body 200, a fixing part 230, a disc spring 222, a control part 250, and a motor 280 ).

The body 200, the fixing part 230, and the adjusting part 250 are the same components as those of FIG. 2, and thus a duplicate description will be omitted.

Specifically, the diaphragm spring 222 has the same configuration as that of the elastic spring 220 in Fig. 2, and has a different configuration. The disc spring 222 is accommodated in the receiving portion 210 to apply a restoring force to the fixing portion 230. The plate spring 222 may be formed by bending both ends of two plate plates at a predetermined curvature and joining them to form a pair, and then joining the surfaces of the pair of plate plates together.

The motor 280 may advance or retract the regulating unit 250 for regulating the elasticity of the disc spring 222. For example, the motor 280 may rotate the regulating unit 250, which is formed in a screw manner, to move it forward or backward. At this time, a DC motor that can be installed in a small size can be used as the motor 280. The motor 280 may be embedded in the body 200 or attached to the outside of the body. Here, the rotating part 290 may be further provided to rotate the adjusting part 250. One end of the rotary column 290 is connected to the coupling groove 251 of the control unit 250 and the other end thereof is connected to the motor 280 to transmit the rotational force of the motor 280 to the control unit 250. Here, one end of the rotating column 290 may be formed in a shape corresponding to the engaging groove 251.

Meanwhile, the present invention may further include a controller (not shown) and a pressure sensor (not shown) for controlling the motor. A pressure sensor (not shown) may be formed in the pressure piston 140 or the pressure storage tank 145 to measure the hydraulic pressure of the pressure piston 140. The pressure sensor (not shown) may transmit a pressure drop signal to the control unit (not shown) when the pressure drops below the set pressure reference value. The pressure sensor (not shown) can transmit a pressure rise signal to a control unit (not shown) when the pressure becomes higher than a set pressure reference value.

The control unit (not shown) receives the pressure drop signal and drives the motor 280 to advance the control unit 250. In addition, the control unit (not shown) receives the pressure increase signal and drives the motor 280 to move the control unit 250 backward.

For example, when the hydraulic pressure or the pneumatic pressure of the pressure piston 140 is not detected in the pressure sensor (not shown) or the hydraulic pressure or the pneumatic pressure is detected below the reference value, the motor 280 is operated to move the fixing portion 230 in the sub- Advance. At this time, the fixing part 230 can be inserted into the seating part 240 formed on the sub slide 120. When the pressure sensor (not shown) senses that the hydraulic or pneumatic pressure of the pressure piston 140 is higher than the reference value, the motor 280 is operated so that the fixing part 230 is moved backward so that the fixing part 230 is separated from the mounting part 240 .

7 is a sectional view showing a safety device of the slide device according to the fourth embodiment.

FIG. 7 includes the same components as those of FIG. 1 except that a motor 280, a case 300, a motion detection sensor 320, and a control unit (not shown) are added. Therefore, the same reference numerals are given to the same constituent elements, and redundant description of the same constituent elements is omitted, and the added constituent elements will be mainly described.

7, the safety device 100 of the slide device according to the fourth embodiment of the present invention includes a body 200, an elastic spring 220, a fixing part 230, a seat part 240, a motor 280 A case 300, a motion detection sensor 320, and a control unit (not shown).

The body 200, the resilient spring 220, the fixing part 230, and the seating part 240 are the same components as those of FIG. 2, and thus a duplicate description will be omitted.

The motor 280 may be connected to the body 200 to reciprocate the body 200 forward or backward. The motor 280 may be a lightweight DC motor. The motor 280 is formed to have a predetermined length and is coupled to the rotating pillar 290 coupled with the body 200.

The case 300 has the motor 280 therein and can support the motor 280. The case 300 can include the motor 280 therein. The case 300 can receive the body 200. The case 300 may be fixed to the fixed slide 110 or the sub-slide 120. The case 300 may include a cylindrical portion 310 having a shape corresponding to the contour of the body 200.

The cylinder 310 may have a length longer than the length of the body 200 to allow the body 200 to reciprocate.

At least one motion detection sensor 320 may be formed in the cylinder 310. The motion detection sensor 320 may transmit a signal for stopping the motor 280 to the controller (not shown) when the body 200 is positioned at a predetermined position in the cylinder 310.

The control unit (not shown) senses a signal from the motion sensor 320 and can stop the operation of the motor 280.

For example, a pressure sensor (not shown) provided in the slide device is formed in the pressure piston 140 or the pressure storage tank 145 to measure the hydraulic pressure or the pneumatic pressure of the pressure piston 140, When the pressure falls below the reference value, a pressure drop signal can be transmitted to the controller (not shown). The pressure sensor (not shown) can transmit a pressure rise signal to the control unit (not shown) when the hydraulic pressure or the pneumatic pressure becomes higher than a set pressure reference value.

The control unit (not shown) receives the pressure drop signal and drives the motor 280 to advance the body 200. The control unit (not shown) receives the pressure increase signal and drives the motor 280 to move the body 200 backward.

For example, when the hydraulic pressure or the pneumatic pressure of the pressure piston 140 is not sensed or the hydraulic pressure or the pneumatic pressure is detected to be below the reference value, the motor 280 is turned on and operated, So that the fixing part 230 can be inserted into the seating part 240 formed on the sub slide 120. When the pressure sensor (not shown) detects the hydraulic pressure or the pneumatic pressure of the pressure piston 140 to be equal to or higher than the reference value, the motor 280 may be retracted so that the fixing part 230 is detached from the seat part 240.

At this time, the motor 280 senses the signal of the motion detection sensor 320 to stop the forward or backward movement of the body 200, thereby preventing the motor 280 from being overloaded. That is, when the body 200 comes into contact with the case 300, the motion sensor 320 may operate to stop the operation of the motor 280.

Meanwhile, the safety device of the slide device according to the embodiment of the present invention can also be used for a vehicle in which the transmission device and the sub-slides are connected by a chain or a wire to vary the length without using the piston by hydraulic pressure or pneumatic pressure.

The transmission transmits power to the chain or wire to advance or retract the sub-slides. At this time, when the chain or the wire is disconnected, the control unit operates the safety device to prevent the sub slide from slipping. At this time, it is preferable that a safety device equipped with the motor 280 shown in FIG. 6 or 7 is installed.

The chain or wire is connected to rollers or the like provided on each sub-slide, and a sensor (not shown) is attached to each roller to sense the rotation of the roller. Here, when the chain or the wire is disconnected, the number of revolutions of the roller is reduced or is not rotated. The detection sensor transmits a disconnection signal to the control unit when the number of roller rotations is sharply reduced or rotation is not detected.

The control unit compares the sub-slides with the operation state to drive the motor 280 provided in the safety device of FIG. 6 or 7 when the disconnection signal is received during operation.

6 or FIG. 7, the control unit may drive the motor 280 provided in the safety device 100 of FIG. 6 or 7 to advance the fixed part to the fixed slide or the sub slide. have. Thus, it is possible to prevent an accident caused by the slip of the sub-slides.

FIG. 8 is a cross-sectional view showing a safety device of the slide device according to the fifth embodiment, FIG. 9 is a schematic view of a solenoid valve formed in the piston, and FIG. 10 is a cross- FIG. 11 is a side view showing a state where the fixing unit provided in the safety device of the slide device shown in FIG. 8 is moved to the sub-slide.

8 to 11, the safety device of the slide device includes a body 200, an elastic spring 220, a fixing portion 230, a regulating portion 250, a fixing portion, a pressure passage 295, 440, a pressure supply line 430, and a solenoid valve 150.

In the body 200, the body 200 may include a receiving part 210 and a fixing part.

The receiving portion 210 has the fixing portion 230 and the elastic spring 220 therein.

The resilient spring 220 is contained in the receiving portion 210 and can apply a restoring force to the fixing portion 230. The adjustment unit 250 can adjust the restoring force of the elastic spring 220. The adjuster 250 may be formed on the body 200. The adjustment unit 250 may be formed on the opposite side of the fixing unit 230 to allow the user to adjust the repulsive force or the restoring force of the elastic spring 220. The controller 250 may be selectively installed by the user.

One side of the fixing portion 230 may be contained in the receiving portion 210 and the other side may be exposed to the outside.

The fixing portion 230 can move the elastic spring 220 in the direction of the sub slide 120 due to the restoring force and move toward the body 200 when the hydraulic or pneumatic pressure enters the receiving portion 210.

The stationary unit pressure passage 295 is a passage through which the hydraulic pressure or the pneumatic pressure of the pressure piston 140 can enter and exit. The fixing part pressure passage 295 may be formed to penetrate from the surface of the body 200 toward the receiving part 210. And the fixed part pressure passage 295 is connected to the pressure supply line 430.

10, when the sub slide 120 is normally lifted or lowered, hydraulic or pneumatic pressure is supplied to the accommodating portion 210 through the pressure supply line 430, so that the body 200 And is disengaged from the seat portion 240.

In this case, the solenoid valve 150 can be controlled so that the hydraulic or pneumatic pressure is supplied to the accommodating portion 210 through the pressure passage 295 only when the pressure piston 140 is raised or lowered.

The solenoid valve 150 is preferably operated by receiving a sensing signal from a sensing sensor (not shown) that senses an increase or a decrease in the hydraulic pressure or the pressure of the pressure piston 140.

For example, a sensing sensor (not shown) senses when a user supplies hydraulic or pneumatic pressure to the pressure piston pressure line 410 for the lifting of the sub slide 120. The solenoid valve 150 is then connected to the pressure piston pressure line 410 of the pressure piston 140 to open the valve to supply hydraulic or pneumatic pressure to the pressure piston pressure line 410. On the other hand, when hydraulic or pneumatic pressure is supplied to the pressure piston depressurizing line 420 for descending the sub slide 120, a sensing sensor (not shown) senses the pressure and operates the valve to supply hydraulic pressure or pressure to the pressure piston depressurizing line 420 Provide air pressure.

At this time, the solenoid valve 150 supplies the hydraulic or pneumatic pressure to the safety device 100 through the pressure supply line 430. Accordingly, the fixing part 230 of the safety device 100 moves toward the body 200, so that the sub slide 120 can be easily raised or lowered.

However, when the hydraulic or pneumatic pressure applied to the sub slide 120 is released due to failure or breakage, the solenoid valve 150 operates to supply the hydraulic or pneumatic pressure of the pressure supply line 430 to the pressure discharge line 440 . Accordingly, the hydraulic or pneumatic pressure inside the body 200 is discharged to the outside, and the restoring force of the elastic spring 220 acts to move the fixing part 230 in the direction of the sub slide 120.

At this time, the fixing portion 230 is inserted into the seating portion 240 formed on the sub slide 120 to fix the sub slide 120 to the fixed slide 110 or the other sub slide 120.

Accordingly, when the hydraulic device or the pneumatic device fails, the sub slide 120 is fixed to the fixed slide 110 and is securely fixed in position.

Meanwhile, in the safety device of the slide device according to the embodiment of the present invention, the shape of the fixing part 230 may be variously formed.

As shown in Fig. 2, a spherical fixing portion may be used, or a bolt-like fixing portion may be used, as shown in Fig.

In addition, as shown in FIG. 12, the end portion may be hemispherically formed in the bolt-like fixing portion 230.

As shown in FIG. 12, when the end of the fixing part 230 is hemispherical, it can easily enter or leave the seating part 240. Accordingly, there is an advantage that a large hydraulic pressure or pneumatic pressure is not required for the seating portion 240 of the large fixing portion 230 when the sub slide 120 is moved up or down.

13, the end of the bolt-shaped fixing part 230 may be formed obliquely.

According to the shape of the fixing portion 230 shown in FIG. 13, the seating portion 240 of the sub-slide 120 may be formed in a corresponding shape. At this time, it is preferable that the end slanting line of the fixing part 230 is inclined so as to easily rise when the sub slide 120 is lifted.

Although not shown in FIGS. 12 and 13, it will be readily understood by those skilled in the art that the shape of the fixing portion 230 may be formed of a polygonal or polygonal column, and thus a detailed description thereof will be omitted.

The safety device of the slide device according to the embodiment of the present invention is mounted on a slide device formed in a multi-stage structure to prevent a slide of a multi-stage structure from being abruptly lowered even if a hydraulic or pneumatic system fails in a multi- It is possible to prevent a safety accident.

The safety device of the slide device according to the above-described embodiment of the present invention can be used by being attached to an agricultural machinery such as a ladder car, a high-altitude car, a special vehicle, a wrecker, a loader or the like using hydraulic or pneumatic.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be clear to the person.

110: Fixed slide (SLIDE)
120: Slide (SLIDE)
140: Pressure piston
145: Pressure storage tank
150: Solenoid valve
200: Body
210:
220: Elastic spring
222: Plate spring
230:
240:
250:
251: Coupling groove
260: first pressure plate
270: second pressure plate
280: motor
290: pivot
295:
300: Case
310:
320: motion detection sensor
410: Pressure Piston Pressure Line
420: Pressure Piston Decompression Line
430: pressure supply line
440: Pressure discharge line

Claims (10)

A safety device for use in a slide device having a fixed slide (SLIDE) and at least one sub-slide (SLIDE) formed to be slidable over the fixed slide (SLIDE)
A body provided on the fixed slide and having a receiving part inside;
An elastic spring installed in the receiving portion to generate a restoring force in a direction opposite to the body; And
A fixing part moving to the seating part formed on the sub slide by the elastic spring and fixing the sub slide with the seating part to the fixed slide with the body attached;
And a control unit for controlling the restoring force of the resilient spring, the resilient spring having a first side and a second side, the first side being in contact with the elastic spring and the second side being protruded outward from the body,
A motor connected to the regulator to move the regulator forward or backward; And
And a control unit for controlling the motor. delete The method according to claim 1,
A first pressing plate that is formed to correspond to the fixing portion on one side and a second pressing plate that contacts the one side of the elastic spring on the other side to uniformly transmit the restoring force of the elastic spring to the fixing portion,
Or a second pressing plate which is in contact with the other side of the elastic spring on the one side and the other side in contact with the regulating part to uniformly transmit the pressure of the regulating part to the elastic spring. delete The method according to claim 1,
And at least one pressure sensor for detecting the hydraulic or pneumatic pressure of the pressure piston and sending a signal to the control unit when the sub slide is expanded or contracted by a pressure piston using hydraulic pressure or pneumatic pressure,
Wherein the control unit operates the motor to move the fixing unit forward when the hydraulic pressure or the pneumatic pressure of the pressure piston is not sensed or the hydraulic pressure or the pneumatic pressure falls below a reference hydraulic pressure value or a pneumatic pressure value set in the pressure sensor, The control unit operates the motor to move the fixing unit backward when the hydraulic pressure or the pneumatic pressure of the motor reaches the set reference oil pressure value or the pneumatic pressure value. The method of claim 1, wherein
A cylinder fixed to the stationary slide or the sub-slide and accommodating the body and reciprocating the body by the motor; And
And at least one motion detection sensor installed in the cylinder and stopping the operation of the motor when the body is positioned at a predetermined position. A safety device for use in a slide device having a fixed slide (SLIDE) and at least one sub-slide (SLIDE) formed to be slidable over the fixed slide (SLIDE)
A body provided on the fixed slide and having a receiving part inside;
An elastic spring installed in the receiving portion to generate a restoring force in a direction opposite to the body; And
A fixing part moving to the seating part formed on the sub slide by the elastic spring and fixing the sub slide with the seating part to the fixed slide with the body attached;
A solenoid valve formed in a pressure piston for raising or lowering the sub-slide, the solenoid valve being opened or closed to selectively supply hydraulic pressure or pneumatic pressure to the pressure piston pressure line and the pressure piston pressure line of the pressure piston;
A pressure supply line connected to the solenoid valve to supply hydraulic or pneumatic pressure to the body side; And
And a pressure discharge line through which the hydraulic or pneumatic pressure discharged from the body is discharged,
Wherein the body is formed with a fixing part formed with one side opened to be connected to the pressure supply line. 8. The method of claim 7,
When the pressure piston rises or falls, the fixing portion is moved in the direction of the elastic spring when the hydraulic pressure or the pneumatic pressure is introduced into the accommodation portion through the pressure supply passage,
Wherein when the operation of the pressure piston is stopped, the hydraulic or pneumatic pressure introduced into the accommodating portion is discharged to the solenoid valve, and the fixing portion is moved to the sub slide side by the restoring force of the elastic spring. Device. 8. The method of claim 1 or 7,
Wherein the fixing portion is formed of any one of a ball shape, a columnar shape, a bolt shape, and a polygonal bar shape. 10. The method of claim 9,
Wherein the ends of the fixing portion formed in the shape of a cylinder, a bolt, and a polygonal bar are inclined or hemispherical in one direction.

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