JPH0433670B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention transmits the rotational force of a motor to a main gear for conversion via a gear train, and operates an operating pin and a locking pin by the rotation of the main gear, thereby positioning the tongue rail. This invention relates to a waterproof electric switch that can be switched to the side and opposite sides and locked.

Conventional waterproof electric point machines have a conversion main gear to which the rotational force of the motor is transmitted via a gear train, and a tongue rail that moves between the normal and opposite sides in conjunction with the rotation of the main gear. a locking mechanism that switches between the stereotaxic side and the opposite side in conjunction with the tongue rail, and a locking mechanism that locks the locking mechanism on the stereotaxic side and locks it on the opposite side. a locking bar displaceable between a reverse locking position and a motion transmitting member that converts rotational motion of the main gear into linear motion and transmits the linear motion to the locking bar; Some devices operate the operating pin, locking pin, and locking bar by rotating the main gear for conversion, thereby converting the tongue rail to the normal position side and the reverse side, and locking the tongue rail.

In such a conventional waterproof electric point machine, the lock can be fixed in position by fitting the protrusion formed on the lock bar into the notch formed in the lock. It is locked either on the side or on the opposite side.

However, when such a conventional waterproof switch machine is used for a long period of time, when trying to insert the protrusion of the lock bar into the notch of the lock pin,
If the fitting position between the notch and the protrusion in the locking position shifts, the corner of the protrusion will catch on the corner of the notch, and when the width of the hook is small,
If you push the locking bar with strong force and try to force the protrusion into the notch, the corners of the protrusion and the notch will be damaged.
In that case, there was the inconvenience of having to install a new lock and lock bar.

Furthermore, in the locked state, if frictional force due to surface pressure is generated between the protrusion and the notch due to the action of an external force on the track, a strong force will be required to unlock the lock. .

The present invention has been made in view of the above circumstances, and when attempting to lock the lock, the fitting position between the protrusion and the notch is shifted, and the corner of the protrusion is displaced from the corner of the notch. Even if an abnormal situation occurs,
This prevents the corner from being damaged or overloading the motor, and also prevents the lock from being unlocked even if a large frictional force is generated between the protrusion and the notch due to a sudden change in surface pressure at the locked position. The purpose is to provide a waterproof electric point machine that can

The gist of this is that there is a motion transmission path in which a spring member 11 for overload buffering is interposed between the motion transmission mechanism and the locking bar 9, and a motion transmission path in which a connecting member 12 that does not deform is interposed. When the locking bar 9 is in the vertical locking position or the reverse locking position, motion is transmitted through a motion transmission path via the connecting member 12, and at other times, The point is that motion is transmitted through a motion transmission path in which the spring member 11 intervenes.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 to 7 show one embodiment of the present invention, FIG. 1 is a plan view showing the switch machine with the main body cover removed, and FIG. 2 is a plan view showing the switch machine with the main body cover attached. FIG. 2 is a cross-sectional view of FIG. 1;

In the figure, code 1 is a waterproof electric switch, 2
is the case. In case 2, operation 3 is
It is pivotally supported so that it can be displaced between the (A) position and (B) position. The operating rod 3 is connected to a tongue rail (not shown) at its end 3a, and when displaced to the (A) position, it moves to the stereotaxic side, and when displaced to the (B) position, it moves to the opposite side. The tongue rail is configured to convert. The space between the operating member 3 and the case 2 has a waterproof structure.

A lock pin 4 is pivotally supported on the case 2 so as to be movable between positions (A) and (B), and its end portion 4a is connected to the tongue rail by a connector 5. connected. The space between the lock 4 and the case 2 has a waterproof structure.

As shown in FIGS. 2 to 5, the lock 4
is composed of a positional locking ring 41 and a reversible locking ring 42, which are parallel to each other and pivotally supported on the case 2 so as to slide together. The positional locking pin 41 has a notch 41a, and the reversing locking pin 4 has a notch 41a.
2 has a notch 42a formed therein.

As shown in FIGS. 1 and 2, a waterproof motor 6 is horizontally attached to the left side 2a of the case 2, and a bevel pinion 61 is formed on the rotating shaft 6a. The bevel pinion 61
meshes with a bevel gear 63 attached to the clutch case 62. A small gear 64 formed integrally with the bevel gear 63 meshes with a large gear 65, and a small gear 66 that rotates integrally with the large gear 65 meshes with the main conversion gear 7.

The bevel binion 61 and the clutch case 6
2. The bevel gear 63, the small gear 64, the large gear 65, and the small gear 66 constitute a reduction gear train that transmits the rotational force of the motor 6 to the main conversion gear 7.

As shown in FIGS. 1 and 2, a conversion roller 71 is fixed to the main conversion gear 7. As shown in FIGS. The converting roller 71 is engaged with a cam groove 31a of a cam plate 31 formed integrally with the operating ring 3.

The relationship between the conversion roller 71 and the cam groove 31a is such that when the conversion main gear 7 rotates clockwise from the state shown in FIG.
displaces the cam plate 31 and the operating pin 3 upward,
In its final position, the operation 3 is as described above (A).
position, and the main gear for conversion 7
However, when the roller 71 rotates counterclockwise from the state shown in FIG. 1, the roller 71 displaces the cam plate 31 and the operating link 3 downward, and in its final position, the operating link 3 is displaced to the above-mentioned (B) position. It is configured as follows.

Furthermore, a conversion cam groove 72 is formed on the upper surface of the conversion main gear 7. A roller 8 is engaged with the cam groove 72, and the roller 8 is attached to a roller attachment head 81 with a bolt 82. A motion transmitting rod 83 is fixed to the roller mounting head 81.

The relationship between the conversion cam groove 72 and the roller 8 is such that the conversion main gear 7 rotates clockwise from the state shown in FIG. The movement transmission rod 83 is configured to be displaced to the left after the conversion main gear 7 rotates counterclockwise and the conversion is completed.

As shown in FIG. 2, FIG. 4, and FIG.
It is supported slidably in the left and right direction on a. The front and rear locking bars 9 have a positional locking protrusion 9a that fits in the notch 41a and a reversible locking protrusion 9b that fits in the notch 42a.

A spring holding mechanism 10 is fixed to the upper part of the locking bar 9. This spring holding mechanism 1
0 includes a base 101 in which holes 101a are formed at locations corresponding to the two internal threads 9c formed on the locking bar 9, and a support wall 102 integrally formed with the base 101; Hollow holes 103a, 104
It has head portions 103 and 104 formed with a shape of 1.a, and is screwed into the spring holding portion 105 formed integrally with the support wall portion 102 and the female thread portion 9c, thereby fixing the base portion 101 to the locking bar 9. Bolt 10
It consists of 6.

As shown in FIGS. 4 and 5, the motion transmitting rod 83 is slidably fitted into the hollow hole 103a. A male threaded portion 83b formed at the tip of the small diameter portion 83a of the motion transmission rod 83 is screwed into a female threaded portion 84a formed on the slider 84 which is slidably fitted into the hollow hole 104a. ing. This female threaded portion 84a and the male threaded portion 83b
The screwing is achieved by turning the square head 84b formed integrally with the slider 84.

A spring member 11 is provided on the outer periphery of the small diameter portion 83a.
is arranged, and the spring member 11 is mounted in compression between the heads 103, 104. Pushes 85 and 86 are inserted between the spring portion 11 and the heads 103 and 104, respectively.

The conversion cam groove 72, roller 8, roller mounting head 81, bolt 82, motion transmission rod 83, slider 84, and bushes 85, 86 convert the rotational motion of the conversion main gear 7 into linear motion. At the same time, it constitutes a motion transmission mechanism that transmits the linear motion to the lock bar 9 via the spring member 11 and the spring holding mechanism 10.

As shown in FIG. 5, the locking bar 9 is formed with a vertical hole 9d, and the spring holding portion 10 is formed with a vertical hole 9d.
5 is also formed with a vertical hole portion 105a. The motion transmitting rod 83 has a reverse funnel-shaped engaging portion 83c at a location that coincides with the vertical hole portion 105a.
is formed.

A connecting rod 12 is slidably inserted into the vertical holes 105a and 9d, and has a chevron-shaped protrusion 12a at its tip that engages with the reverse funnel-shaped engaging portion 83c.
is formed. Lower end 12 of the connecting rod 12
A steel ball 121 is inserted between b and the base surface 21a.

As shown in FIG. 5, a cam surface 13 for the steel ball 121 is formed on the base surface 21a. This cam surface 13 has the locking bar 9 in the fifth position.
In the process of displacing to the right from the unlocked state shown in the figure, the stereotactic lock protrusion 9a is moved to the notch 4.
After starting to insert steel ball 1a (at this point, steel ball 12
1 rides on the end 133a) the protrusion 9a
Until the steel ball 121 and the connecting rod 12 are completely inserted into the notch portion 41a (when the locking bar 9 is in the fixed position locking position), the steel ball 121 and the connecting rod 12 are displaced upwardly, and the connecting rod 12 is moved oppositely to the chevron-shaped projection portion 12a. It has a second cam surface 133 that engages with the funnel-shaped engagement portion 83c.

The cam surface 13 is connected to the lock cover 9.
In the process of being displaced leftward from the state shown in FIG.
2a (at this point, the steel ball 12
1 rides on the end 131a), the protrusion 9
Until the steel ball 12 is fitted into the notch 42a (when the locking bar 9 is in the reverse locking position), the steel ball 12
1 and the connecting rod 12 upward, and has a first cam surface 131 that engages the chevron-shaped protrusion 12a and the reverse funnel engaging portion 83c.

Further, when the locking bar 9 is in a state where the projection 9a or 9b is not fitted into either the cutout 41a or 42a, the cam surface 13 By displacing the ball 121 and the connecting rod 12 downward, the chevron-shaped protrusion 12a
It has a third cam surface 132 that releases the engagement with the inverted funnel-shaped engagement portion 83c.

The connecting rod 12, steel ball 121, vertical hole 105
a, 9d, the engaging portion 83c and the cam surface 13,
The locking bar 9 is in the locking position (each protrusion 9a,
9b starts to fit into each notch 41a, 42a until it completely fits in), the movement transmitting rod 83 and the locking bar 9 are connected to the spring member 1.
This constitutes a connection mechanism that connects directly without going through 1.

As shown in FIG. 2, a cover 14 is attached to the case 2, and an inspection window 141 is formed in the cover 14. As shown in FIG. A waterproof cover 15 is attached to the cover 14, and below this waterproof cover 15 is a handwheel insertion port 16.
is provided.

A circuit controller 17 is provided inside the case 2, and the circuit controller 17 is connected to the lock bar 9.
By detecting the position of the switch, the rotation of the motor 6 is controlled and the position of the point machine is displayed. The position display of the switch machine by the controller 17 is observed through the inspection window 141.

Further, inside the case 2, a relay 18 for controlling the switch, a connection terminal 19 for connecting to external wiring, and a lock error detector 20 are arranged.

The operation of the first embodiment of the present invention will be explained below.
When switching the point machine 1 from the state shown in FIGS. 1 to 5 to the normal position side and locking it, when a current with the normal polarity is applied to the motor 6, the rotation of the motor 6 is reduced by the reduction gear train. Main gear 7 for conversion via 61 to 66
is transmitted to. When the conversion main gear 7 rotates clockwise from the state shown in FIG.
1 and the cam groove 31a, the operation mechanism 3
is displaced to the (A) position side, and as a result, the actuator 3 displaces the tongue rail to the localization side.

In conjunction with the displacement of the tongue rail toward the stereotaxic side, the stereotaxic locking pin 41 is displaced to the left from the state shown in FIG.
Displaced to a position where it can be inserted into the

On the other hand, when the main gear 7 rotates clockwise from the changing state shown in FIG. 81 to 86 displace the locking bar 9 from the state shown in FIG. 5 via the spring member 11 and the spring holding mechanism 10. The protrusion 9
When the steel ball 121 starts to fit into the notch 41a, the steel ball 121 rides on the second cam surface 133, and the chevron-shaped protrusion 12a engages with the reverse funnel-shaped engagement part 83c, so that the protrusion 9a From the time it starts to fit into the notch 41a until the locking bar 9 completely locks the stereotactic locking ring 41 on the stereotactic side (when it is in the stereotactic locking position), the The transmission of movement from the rod 83 to the locking bar 9 takes place via the force of the connecting rod 12 and the spring 11.

Similarly, when switching the switch 1 from the state shown in FIGS. 1 to 5 to the opposite side and locking it, applying a potential of the opposite polarity to the motor 6 will cause the switch 3 to operate.
(B) Displace to the position side and displace the tongue rail to the opposite position side. Interlocking with this displacement of the tongue rail, the reversible lock pin 42 is displaced rightward from the state shown in FIG. 3, and is displaced to a position where the protrusion 9b can fit into the notch 42a.

On the other hand, since the rod 83 is displaced leftward from the state shown in FIG.
8, 81 to 86 displace the locking bar 9 to the left from the state shown in FIG. 5 via the spring member 11 and the spring holding mechanism 10. The protrusion 9b is the notch 4
2a, the steel ball 121 rides on the first cam surface 131, and the chevron-shaped protrusion 12a engages with the engaging portion 83c. , until the locking bar 9 completely locks the reverse lock pin 42 on the reverse side (when it is in the reverse lock position), the lock is released from the rod 83. lock bar 9
The transmission of motion to takes place via the force of the spring 11 and the connecting rod 12.

When the locking bar 9 is displaced from the state shown in FIG. 5 to the vertical locking position or the reverse locking position, the corner 9a' or 9
When b' is caught on the corner of the notch 41a or 42b, the locking bar 9 does not move, and the linear movement of the rod 83 compresses the spring member 11.

Furthermore, when attempting to unlock the lock bar 9 in the reverse or normal lock position, the protrusions 9a, 9b and the notch 41 may
Even if a frictional force greater than the force of the spring 11 due to surface pressure is generated between the rod 83 and the locking bar 9, the rod 83 and the locking bar 9 are directly connected to each other by the connecting rod 12 while in the locking position. Since they are connected, the lock bar 9 can be unlocked.

FIGS. 6 and 7 are enlarged views of the waterproof cover 15 and the manual handle insertion port 16.

As shown in FIGS. 6 and 7, the insertion port 16
A waterproof ring 16a is provided around the periphery.
A waterproof ring 30b is provided on a rod 30a of a safety lever 30 for cutting off power to the motor 6. A waterproof ring 32a is provided at the top of the cylindrical waterproof wall 32, and the waterproof cover 15 is also provided with a waterproof ring 15a.

With this configuration, by opening the waterproof cover 15 and displacing the safety device lever 30 toward the pin 33, the power to the motor 6 is cut off, and the handwheel is inserted into the insertion port 16 and turned by hand. Even if water flows in from the outside during work, water can be prevented from entering the inside through the insertion port 16, the upper part of the cylindrical waterproof wall 32, and the rod 30a.

As described above, according to the present invention, the motion transmission mechanism is configured to transmit its linear motion to the locking bar via the spring member in intermediate positions other than the normal position and the reversed chain position. Therefore, an abnormal situation may occur in which the fitting position between the protrusion of the lock bar and the notch of the locking pin is misaligned, and the corner of the protrusion gets caught in the corner of the notch. Even if the locking bar does not move, the spring member is compressed by the linear movement of the motion transmitting rod.
The corners of the protrusion and cutout can be prevented from being damaged.

In the locking position, the locking bar is connected to the motion transmission mechanism by the connecting mechanism, so there is large friction between the protrusion and the notch due to changes in surface pressure due to the external force of the track. Even if a force is generated, the lock can be unlocked by the force of the motor or handwheel transmitted from the motion transmission mechanism.

Furthermore, according to the structure in which the handwheel insertion port is made watertight as described above, the handwheel insertion port, the shaft of the safety lever, etc. are sealed with a prevention ring, so that When the handle is inserted into the mouth and the handle is operated by hand, water can be prevented from seeping through the insertion port, the shaft of the safety device lever, etc.

[Brief explanation of drawings]

FIG. 1 is a plan view of a waterproof electric switch according to an embodiment of the present invention, with the cover removed. Figure 2 is a longitudinal sectional view of Figure 1.
The cover is shown installed.
FIG. 3 is an explanatory diagram of the locking pin, and FIGS. 4 to 7 are partially enlarged views of the switch machine. 3...Operation pin, 4...Lock pin, 6...Motor, 7...Main gear for conversion, 9...Lock bar,
8, 72, 81-86...Motion transmission mechanism, 11...
...Spring member, 12, 13, 121, 105a, 9
d, 83c...Connection mechanism.

Claims (1)

[Scope of Claims] 1. A conversion main gear 7 that rotates in conjunction with the motor 6, an operation for switching the tongue rail between the stereotaxic side and the opposite side in conjunction with the rotation of the conversion main gear 7, and the tongue rail. A locking pin 4 that switches between the normal position and the opposite side in conjunction with the rail, a reverse locking position where the locking pin 4 is locked on the opposite side, and a positional locking position where the locking pin 4 is locked on the normal position side. A locking bar 9 that is movable in three positions with respect to an intermediate release position, and a motion transmission mechanism that converts the rotational motion of the conversion main gear 7 into linear motion and transmits the linear motion to the locking bar 9. In a waterproof electric point machine having: between the motion transmission mechanism and the lock bar 9,
A coupling mechanism is provided in which a motion transmission path in which an overload buffering spring member 11 intervenes and a motion transmission pathway in which a non-deformable coupling member 12 intervenes are arranged in parallel, and the lock bar 9 is connected to the positional lock. When in the position or in the reverse chain position, motion is transmitted through a motion transmission path via the connecting member 12, and at other times, motion is transmitted through a motion transmission path through which the spring member 11 is interposed. Model electric point machine.