KR101713912B1 - Crossing gate for vehicles - Google Patents

Abstract

A vehicle circuit breaker according to the present invention includes a slave shaft rotatably mounted on a frame and rotatable in a forward and reverse direction, a slave shaft coupled to a rear end of the slave shaft such that the slave bar is rotatably coupled to the opening and closing side, and a first connecting end coupled to the front end of the slave shaft A driven crank disposed on the other side of the driven crank so as to be eccentrically rotatable in the forward and reverse directions of the other of the first and second rotary stages; And a horizontal rotation axis of the first connection end is coupled to the upper guide groove such that the horizontal rotation axis of the first connection end can be rotated and moved in both directions in the forward and reverse directions, And a second connecting rod which is inserted into both ends of the guide groove in the longitudinal direction of the guide groove, The impact that occurs when the move in both directions and a pair of elastic member for buffering.

Description

{CROSSING GATE FOR VEHICLES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle circuit breaker, and more particularly, by applying an elastic member for shock buffering to a connecting portion between a connecting rod and a driven crank, And more particularly, to a vehicle circuit breaker capable of reducing damage to transmission parts and operation noise.

Generally, a vehicle breaker is used to identify and control the passage of a vehicle or a pedestrian in a parking lot or a specific building, while being named as a vehicle breaker, a vehicle access gate, and the like.

The vehicle circuit breaker includes a housing, a blocking bar rotatably installed in the housing and extending horizontally to physically interrupt the entry and exit of the vehicle and the pedestrian, and driving means for rotating the blocking bar in the opening and closing direction .

A motor is used as a power generating source for driving the shutters, and a plurality of links and cranks are used so that the shutters can rotate upward or downward in conjunction with the rotational motion of the motor.

In addition, various control means using a speed reducer or a sensor are provided to control the rotation of the motor, and a mechanical element type such as a belt or a plurality of gear combinations is used according to the driving system or the power transmission system.

However, since the conventional vehicle circuit breaker has a structure for controlling the opening and closing operation of the shut-off bar at the speed of the motor, when the shut-off bar is rotated in the opening and closing direction, the impact is concentrated on the connecting portions of the plural links and the crank, Connections between parts are broken or operating noise is generated.

A prior art related to the present invention is Korean Patent No. 10-1005995 (December 28, 2010), which discloses a multifunctional vehicle breaker.

It is an object of the present invention to provide a shock absorbing structure capable of mechanically buffering impact generated during opening and closing operations of a shut-off bar by applying an elastic member for impact shock to a connecting portion between a connecting rod and a driven crank, The present invention provides a vehicle breaker capable of reducing the number of vehicles.

Another object of the present invention is to provide a vehicle circuit breaker which can prevent a breaker bar from being easily broken by an external force by providing a buffer rubber having a certain elasticity on the length of the breaker bar.

A vehicle circuit breaker according to the present invention includes a slave shaft rotatably mounted on a frame and rotatable in a forward and reverse direction, a slave shaft coupled to a rear end of the slave shaft such that the slave bar is rotatably coupled to the opening and closing side, and a first connecting end coupled to the front end of the slave shaft A driven crank disposed on the other side of the driven crank so as to be eccentrically rotatable in the forward and reverse directions of the other of the first and second rotary stages; And a horizontal rotation axis of the first connection end is coupled to the upper guide groove such that the horizontal rotation axis of the first connection end can be rotated and moved in both directions in the forward and reverse directions, And a second connecting rod which is inserted into both ends of the guide groove in the longitudinal direction of the guide groove, The impact that occurs when the move is characterized in that a pair of elastic members to the buffer in both directions.

Here, the slave shaft may further include a balance member for applying a rotational weight set in the reverse rotation direction.

The balance member is formed by projecting from the outer periphery of the driven shaft and connected to the connection crank eccentrically rotated in the forward and reverse directions of the driven shaft and the eccentrically rotated one end of the connection crank, And a guide support vertically installed inside the frame and supporting the guide to support the weight so as to be able to raise and lower the weight.

In addition, the balance member may be further provided with a support roller spaced apart from the driven shaft in the reverse rotation direction, for rotating the wire in a downward direction.

In addition, the connection crank may be positioned vertically to the upper side when the blocking bar is rotated to the closed side, and horizontally positioned in the reverse rotation direction when the blocking bar is rotated to the open side.

In addition, the driving crank may be vertically positioned at the upper portion when the blocking bar is rotated toward the closed side, and vertically positioned at the lower portion when the blocking bar is rotated to the open side.

In addition, the driven crank may be positioned such that the drive crank is inclined upwards in the reverse rotation direction when vertically positioned, and the drive crank may be positioned downwardly inclined in the reverse rotation direction when positioned horizontally.

In addition, a bearing for reducing the frictional force with the guide groove may be further coupled to the outside of the horizontal rotation shaft.

The guide groove may have a length along the vertical direction, and the elastic members may be respectively positioned at both longitudinal ends of the guide groove with respect to the horizontal rotation axis of the first connection end, The rotary shaft can be elastically supported in the vertical direction.

In addition, a tension adjusting member for adjusting the tension of the elastic members may be further coupled to an upper end of the connecting rod, and the tension adjusting member may be threadedly coupled through both longitudinal ends of the guide groove, The tension of the elastic members can be individually adjusted.

Further, a holder member coupled to a rear end of the follower shaft may be further coupled to a rear end of the shut-off bar, the holder member is coupled in a state of wrapping around the back of the shut-off bar, And a holder cover hinged to one side of the housing with respect to a vertical rotation axis and horizontally pivotally opened and closed with respect to the vertical rotation axis.

The rear end of the shut-off bar may be fixed to the holder cover. When the force exceeding the reference range is transmitted in the axial direction of the follower shaft, the holder cover is pivotally opened with respect to the vertical rotation axis, .

Further, the holder cover may further include a magnet so as to be attached to a surface of the holder cover corresponding to the housing by a magnetic force.

Further, the rear end of the driven shaft may have a tapered shape gradually decreasing in diameter toward the rear, and the insertion port may be formed with a corresponding tapered groove so that the rear end of the driven shaft is correspondingly inserted.

Further, on the length of the shut-off bar, one or more buffering rubbers may be further coupled to absorb impact.

The present invention applies a shock absorbing elastic member to the connecting portion between the connecting rod and the driven crank to mechanically cushion an impact generated during the opening and closing operation of the shut-off bar, thereby reducing damage to the power transmitting component and operation noise .

Further, by providing the buffer rubber having a certain elasticity on the length of the blocking bar, the blocking bar can be prevented from being easily broken by an external force.

1 is a perspective view illustrating a vehicle circuit breaker according to the present invention
2 is an exploded perspective view showing a vehicle circuit breaker according to the present invention
3 is an exploded perspective view showing the driving crank, the driven crank, the connecting rod, and the elastic member in detail in the vehicle circuit breaker according to the present invention.
4 is a front view showing the internal structure of the frame in the vehicle circuit breaker according to the present invention.
5 is a left side view showing a vehicle circuit breaker according to the present invention.
6 is an operational state diagram illustrating a state in which the blocking bar of the vehicle circuit breaker according to the present invention is rotated to the closed position.
7 is an operational state diagram showing a state in which the blocking bar of the vehicle circuit breaker according to the present invention is rotated to the open position.
8 is a plan view showing in detail the application state of the magnet and the buffer rubber in the vehicle circuit breaker according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving it will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

FIG. 1 is a perspective view showing a vehicle circuit breaker according to the present invention, and FIG. 2 is an exploded perspective view showing a vehicle circuit breaker according to the present invention.

3 is an exploded perspective view showing the driving crank, the driven crank, the connecting rod, and the elastic member in detail in the vehicle circuit breaker according to the present invention.

4 is a front view for showing the internal structure of the frame in the vehicle breaker according to the present invention, and FIG. 5 is a left side view for showing a vehicle circuit breaker according to the present invention.

1 to 4, a vehicle circuit breaker according to the present invention includes a frame 100, a driven shaft 200, a driven crank 300, a drive crank 400, a connecting rod 500, And includes a pair of elastic members (600).

In addition, a motor 700 for transmitting a rotational force to the driving crank 400 is installed in the frame 100.

First, the frame 100 is installed at a predetermined height, and an installation space 110 is formed in which the respective components can be installed.

A detachable front panel 120 may be coupled to the front of the frame 100 using a plurality of fastening members.

The front panel 120 may have a plurality of through holes so that the front end of the slave shaft 200 and a driving shaft of the motor 700 can pass through the front panel.

A through hole may be formed in the rear surface of the frame 100 to allow the slave shaft 200, which will be described later, to pass through.

That is, the installation space 110 of the frame 100 and the front surface of the front panel 120 form a space for installing a plurality of configurations.

An operation switch (not shown) for manually operating the motor 700 may additionally be provided outside the frame 100.

In addition, a sensor may be installed on the frame 100 or the shut-off bar 10 to sense an external impact and to open the motor 700. FIG.

The follower shaft 200 is provided to transmit rotation force transmitted from the motor 700 to the shutting bar 10 and is rotatably installed in the installation space 110 of the frame 100 in the forward and reverse directions.

The rear end of the driven shaft 200 passes through the through hole of the frame 100 and the shutoff bar 10 is coupled to the open end of the driven shaft 200 at the rear end thereof.

The front end of the driven shaft 200 passes through the through hole of the front panel 120 and the driven crank 300, which will be described later, is coupled to the front end of the driven shaft 200.

The follower shaft 200 may further include a balance member 210 for applying a predetermined rotational weight to the counterclockwise direction.

The balance member 210 for this purpose may be provided with a connection crank 211, a weight 212, a wire 213, a guide support 214, and a support roller 215.

The connecting crank 211 protrudes from the outer periphery of the driven shaft 200 and can be eccentrically rotated in the forward and reverse directions of the driven shaft 200.

Here, a coupling hole for coupling one end of the wire 213 may be formed at one end of the connection crank 211 that is eccentrically rotated.

In addition, a bearing B for facilitating rotation can be installed at the front end and the rear end of the driven shaft 200, respectively.

The weight 212 is connected to the eccentrically rotating end of the connecting crank 211 by a wire 213 and acts to set the weight in the direction of reverse rotation of the connecting crank 211.

The weight 212 may be formed by stacking a plurality of metal plates in a plurality of steps along the vertical direction.

That is, the weight of the weight 212 can be easily adjusted, and the balance can be adjusted according to the weight of the shut-off bar 10. [

The other end of the wire 213 is connected to the upper end of the weight 212 and the weight of the weight 212 is connected to the connecting crank 211 .

The guide support 214 is vertically installed in the installation space 110 of the frame 100 so as to support the weight 212 so as to be able to move up and down.

Here, the guide supports 214 may be fixed to the inner wall surface of the frame 100, and the guide supports 214 may be installed in pairs to guide both sides of the weight weights 212.

In addition, grooves corresponding to the pair of guide supports 214 may be formed on both sides of the weight 212 along the vertical direction.

The support roller 215 is provided to rotate and support the wire 213 below the wire 213 and is spaced apart from the driven shaft 200 in the reverse direction.

Here, the support roller 215 is rotated in the forward and reverse directions along the moving direction of the wire 213 with respect to the horizontal rotation axis, and the horizontal rotation axis can be fixed to the inner wall surface of the frame.

The driven crank 300 is disposed on the front surface of the front panel 120 and is coupled to the front end of the driven shaft 200 protruding forward of the front panel 120.

Here, the driven crank 300 is installed such that the first rotating end 320 on the other side is eccentrically rotatable in the forward and reverse directions with respect to the first connecting end 310 coupled to the front end of the driven shaft 200.

The first connecting end 310 of the driven crank 300 may be formed with a horizontal rotation axis 311 for rearward insertion or insertion into the guide groove 510 to be described later.

A bearing B for reducing a frictional force when moving in a guide groove 510 to be described later may further be coupled to the horizontal rotation shaft 311 of the first connection end 310.

The driving crank 400 is disposed below the driven crank 300 and transmits rotational force to the driven cranes 300 through a connecting rod 500 to be described later.

The driving crank 400 is disposed on the front surface of the front panel 120 and is coupled to the driving shaft 710 of the motor 70 protruding forward of the front panel 120.

The driving crank 400 is installed on the other side of the second rotating end 420 with respect to the second connecting end 410 coupled to the driving shaft 710 of the motor 700 so as to be eccentrically rotatable in the forward and reverse directions .

The connecting rod 500 is connected to both the driving crank 400 and the driven crank 300 at both ends thereof and cuts off the rotational force transmitted from the driving crank 400 to the driven crank 300.

In particular, a guide groove 510 is formed in the upper end of the connecting rod 500, and a lower end of the connecting rod 500 is rotatably coupled to the driven crank 300 by a horizontal rotary shaft.

In more detail, the horizontal rotation axis 311 of the first connection end 310 is inserted or inserted into the guide groove 510 formed at the upper end of the connecting rod 500.

Here, the guide groove 510 is formed as a long groove having a length along the vertical direction so that the horizontal rotation axis 311 of the first connection end 310 can be moved in both directions.

At this time, the horizontal rotation axis 311 of the first connection end 310 is coupled to be rotatable in the forward and backward direction within the guide groove 510 and to be movable in both directions.

The elastic members 600 are positioned at both longitudinal ends of the guide groove 510 with respect to the horizontal rotation axis 311 of the first connection end 310.

Here, the elastic members 600 elastically support the horizontal rotation axis 311 of the first connection end 310 in the vertical direction.

As shown in FIG. 3, the elastic members 600 may be coil springs for applying a compressive force in both directions of the horizontal rotation shaft 311. However, the elastic members 600 may be applied as a plate spring.

A tension adjusting member 800 for adjusting the tension of the elastic members 600 may further be coupled to the upper end of the connecting rod 500.

The tension regulating member 800 for this purpose may be threadedly coupled through both longitudinal ends of the guide groove 510 as shown in FIG.

Since the tension adjusting member 800 is coupled to both longitudinal ends of the guide groove 510, the tension of the elastic members 600 can be individually adjusted.

Further, a holder member 900 coupled to the rear end of the follower shaft 200 may further be coupled to the rear end of the blocking bar 10 described above.

Here, the holder member 900 may include a housing 910 and a holder cover 920 as shown in FIG.

The housing 910 is coupled in a state of wrapping around the rear of the blocking bar 10 and an insertion port 911 is formed at one side of the housing 910 so that the rear end of the follower shaft 200 is coupled.

The insertion port 911 is inserted in a shape corresponding to the rear end of the driven shaft 200 as shown in FIG. 5, and can be engaged with the rear end of the driven shaft 200 by a separate fastening member.

In addition, the rear end of the follower shaft 200 may have a tapered shape whose diameter gradually decreases toward the rear.

In addition, the insertion port 911 may be formed in a corresponding tapered groove so that the rear end of the follower shaft 200 is correspondingly inserted.

As such, the ease of assembly can be provided by using the corresponding tapered shape of the insertion port 911 and the driven shaft 200.

The holder cover 920 is hinged to one side of the housing 910 with respect to the vertical rotation axis 930 and horizontally pivotally opened and closed with respect to the vertical rotation axis 930.

Here, the rear end of the shut-off bar 10 may be fixedly coupled to the inside of the holder cover 920 facing the housing 910.

The holder cover 920 may be detached from the housing 910 by being pivotally opened with respect to the vertical rotating shaft 930 when a force greater than a reference range is transmitted in the axial direction of the driven shaft 200.

To this end, a magnet M may be further coupled to the inner surface of the holder cover 920 so as to be attached to the corresponding surface of the housing 910 by a magnetic force.

For example, when the blocking bar 10 is collided with the vehicle in the state of being turned to the closed position, the holder cover 920 is opened from the housing 910 and at the same time, the blocking bar 10 is avoided Can be pivoted.

That is, by applying the rotation opening / closing structure of the holder cover 920 and the housing 910, the blocking bar 10 and the vehicle can be prevented from being damaged.

In addition, as shown in FIG. 8, one or a plurality of cushioning rubbers R may be further provided on the length of the shut-off bar 10 to absorb impact.

The buffer rubber (R) may be installed at a plurality of predetermined intervals along the longitudinal direction of the shut-off bar (10).

The buffer rubber (R) may surround the central axis of the shut-off bar (10) and be formed in a ring shape so as to be flush with the outer surface of the shut-off bar (10).

That is, since the buffer rubber (R) has a certain elastic force, when shock acts on the blocking bar (10), it gives softness so as to buffer vibration and impact transmitted from the blocking bar (10) 10 can be prevented from being easily broken by an external force.

Hereinafter, the opening and closing operation of the vehicle circuit breaker according to the present invention will be described with reference to FIGS. 6 and 7. FIG.

First, when the blocking bar 10 is to be rotated to the closed position, the driving shaft 710 of the motor 700 is rotated in the forward direction as shown in FIG.

At this time, the first connecting end 310 of the driving crank 400 installed on the driving shaft 710 of the motor 700 is rotated in the forward direction and the connecting rod 500 is interlocked with the upper end.

At the same time, the first connecting end 310 of the driven crank 300 connected to the upper end of the connecting rod 500 is rotated in the forward direction to rotate the driven shaft 200 in the forward direction.

The horizontal rotation axis 311 of the first connection end 310 is moved along the guide groove 510 formed at the upper end of the connecting rod 500 to a predetermined length.

At this time, since the horizontal rotation axis 311 of the first connection end 310 is buffered in both directions by the elastic members 600, the operation shock between the connecting rod 500 and the driven crank 300 is absorbed .

The connecting crank 211 of the driven shaft 200 is rotated in the forward direction to pull the wire 213 upward and the weight 212 is lifted along the guide support 214 by the pulling force of the wire .

At this time, since the weight 212 acts on the blocking bar 10 in a direction opposite to the rotation direction of the blocking bar 10, a certain buffering force acts on the blocking bar 10, It is possible to buffer a certain part of the impact that may occur.

In this way, when the shutting bar 10 completes the rotation to the open position, the connecting crank 211 is positioned vertically to the upper side in the rotational position from the shutting bar 10 to the closing side, 10 are vertically positioned on the closed side in the rotational position.

Further, the driven crank 300 is positioned such that the driving crank 400 is vertically inclined upward in the reverse rotation direction when positioned.

Conversely, when the blocking bar 10 is to be rotated to the open position, the driving shaft 710 of the motor 700 is rotated in the reverse direction as shown in FIG.

At this time, the first connecting end 310 of the driving crank 400 installed on the drive shaft 710 of the motor 700 is rotated in the opposite direction and the connecting rod 500 is interlocked with the lower end.

At the same time, the first connecting end 310 of the driven crank 300 connected to the upper end of the connecting rod 500 rotates in the reverse direction, and rotates the driven shaft 200 in the reverse direction.

The horizontal rotation axis 311 of the first connection end 310 is moved along the guide groove 510 formed at the upper end of the connecting rod 500 to a predetermined length.

At this time, since the horizontal rotation axis 311 of the first connection end 310 is buffered in both directions by the elastic members 600, the operation shock between the connecting rod 500 and the driven crank 300 is absorbed .

The connection weight 211 is moved downward by the connecting crank 211 of the driven shaft 200 being rotated in the opposite direction and the weight 213 is moved downward by the downward movement of the wire 213, .

At this time, since the weight 212 acts on the force that is set in a direction opposite to the rotation direction of the shut-off bar 10, it helps to lift the shut-off bar 10, .

In this way, when the shutting bar 10 completes the rotation to the open position, the connecting crank 211 is positioned vertically to the upper side in the rotating position from the shutting bar 10 to the closing side, And is vertically positioned at the upper side in the rotational position toward the closed side.

Further, the driven crank 300 is positioned such that the driving crank 400 is vertically inclined upward in the reverse rotation direction when positioned.

As a result, by applying the elastic member 600 for impact buffering to the connecting portion between the connecting rod 500 and the driven crank, the shock generated during the opening and closing operations of the shut-off bar 10 can be mechanically buffered This reduces damage to the power transmission components and reduces operating noise.

Further, by providing the buffer rubber (R) having a certain elasticity on the length of the blocking bar, the blocking bar can be prevented from being easily broken by an external force.

Although the embodiment of the present invention has been described above, it will be apparent that various modifications may be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

10: blocking bar 100: frame
110: installation space 120: front panel
200: slave axis 210: balance member
211: connection crank 212: weight weight
213: wire 214: guide support
215: support roller 300: driven crank
310: first connecting end 311: horizontal rotating shaft
320: first rotating stage 400: driving crank
410: second connecting end 420: second rotating end
500: connecting rod 510: guide groove
600: elastic member 700: motor
710: drive shaft 800: tension adjusting member
900: holder member 910: housing
911: insertion port 920: holder cover
930: Vertical rotation axis B: Bearing
M: Magnet R: Cushion rubber

Claims (15)

A slave shaft rotatably mounted on the frame and rotatable in a forward and reverse direction;
A driven crank having a first rotating end on the other side of the first connecting end coupled to the front end of the driven shaft, the first rotating end being eccentrically rotatable in the forward and reverse directions;
A drive crank disposed below the driven crank and having a second rotation end on the other side thereof being rotatable in an eccentric direction relative to a second connection end connected to a drive shaft of the motor;
A connecting rod in which a horizontal rotation axis of the first connection end is rotatably coupled to the guide groove at an upper end so as to be movable in both the forward and reverse directions and the second connection end is rotatably coupled at a lower end thereof in the forward and reverse directions;
A pair of elastic members which are inserted into both longitudinal ends of the guide groove and which absorb shock generated when the horizontal rotation axis of the first connection end moves along the guide groove in both directions;
A balance member formed on the driven shaft to apply a rotational weight set in a reverse rotation direction; And
And a buffer rubber formed along the longitudinal direction of the shut-off bar to absorb a shock transmitted to the shut-off bar, the buffer rubber surrounding the central axis of the shut-off bar, In addition,
The balance member
A connecting crank formed to protrude from the outer periphery of the driven shaft and eccentrically rotated in a forward and reverse rotational direction of the driven shaft; And a guide support vertically installed in the frame to guide and support the weight so that the weight can be further elevated and lowered. The weight weight is formed by stacking a plurality of metal plates in a plurality of stages along the vertical direction And,
A holder member coupled to a rear end of the slave shaft is further coupled to a rear end of the blocking bar,
The holder member
A housing coupled to the rear side of the blocking bar so as to surround the rear of the blocking bar and having an insertion port formed at one side thereof for coupling the rear end of the follower shaft; Wherein the holder cover is further provided with a magnet so that the holder cover can be attached to the surface of the housing by a magnetic force.
delete delete The method according to claim 1,
The balance member
Further comprising: a support roller installed to be spaced apart from the driven shaft in a reverse rotation direction, for supporting the wire in a downward direction. The method according to claim 1,
The connecting crank comprises:
Wherein the blocking bar is vertically positioned at an upper portion in a rotating position toward the closed side and the blocking bar is horizontally positioned in the reverse rotation direction at the rotating position toward the open side. The method according to claim 1,
The drive crank includes:
And the blocking bar is vertically positioned at the upper portion in the rotational position toward the closed side, and the blocking bar is vertically positioned at the lower portion at the rotating position toward the open side. The method of claim 6,
Wherein the driven crank comprises:
Wherein the drive crank is vertically inclined in a reverse rotation direction when positioned, and the drive crank is positioned downwardly inclined in a reverse rotation direction when positioned horizontally. The method according to claim 1,
On the outside of the horizontal rotation shaft,
And a bearing for reducing the frictional force with the guide groove is further coupled. The method according to claim 1,
The guide groove
Having a length along the vertical direction,
The elastic members
Wherein the first connection end is located at both longitudinal ends of the guide groove with respect to the horizontal rotation axis of the first connection end so as to elastically support the horizontal rotation axis of the first connection end in the vertical direction. The method of claim 9,
At the upper end of the connecting rod,
Further comprising a tension adjusting member for adjusting the tension of the elastic members,
Wherein the tension adjusting member comprises:
Wherein the elastic member is inserted through the longitudinally opposite ends of the guide groove in a threaded manner to individually adjust the tension of the elastic members. delete The method according to claim 1,
The rear end of the shut-
A holder cover fixed to the holder cover,
The holder cover
Wherein when a force greater than a reference range is transmitted in the axial direction of the follower shaft, the lever is pivotally opened on the basis of the vertical rotation axis and separated from the housing. delete The method according to claim 1,
The rear end of the driven shaft
And has a tapered shape in which the diameter progressively decreases toward the rear,
The insertion port
And a rear end of the driven shaft is formed into a corresponding tapered groove so as to be correspondingly inserted. delete

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