JP2896631B2 - Conversion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle conversion device and an electric switch conversion structure for use in railroad track branching, and in particular, a backside indexing is possible even in a line branch using long points. The structure of a simple conversion device.

[0002]

2. Description of the Related Art As shown in FIG. 6, a point conversion structure using an on-board conversion device or an electric point machine is shown in FIG.
The tongue rails 103 and 104 are arranged between a pair of basic rails composed of the opening-side rail 102 and the tongue rails move on the point floor plate in an arc around the fulcrum (heel portion) 105, and the contact side rails It is configured so as to be in close contact with any one of the basic rails 101 or the opening side rail 102 to switch between localization (solid line state in FIG. 6) or inversion (dotted line state in FIG. 6). The conversion device having the above structure is, for example, as shown in FIG.
An operation rod 106 for generating a force required for a point change is connected to a tip of the pair of tong rails 103 and 104 by a connecting rod 1.
07, and a lock stick 108 for performing lock detection is connected via a switch adjuster 109. Then, the conversion is performed by mechanically locking by the electric conversion operation by the conversion unit 110.

[0003] As a conversion device, there is a conversion device that can be indexed backwards, which is mainly used for branching a track on a private railway. This conversion device includes a pair of tong rails 103 and 10 as shown in FIG.
4, a lock operation rod 201 for generating a force required for changing points, an index operation rod 2 receiving an indexing force
02 are connected via connecting rods 203, and when the train enters from the opposite direction A, it is locked or locked by an electrical turning operation by the turning unit 110, so that it is positioned or inverted, and from the back direction B. It is configured to be able to automatically determine the entry of a train. That is, the lock operation rod 201 and the index operation rod 201 are
A locking mechanism interlocked with a cam or the like is formed in 0, and the locking operation rod 201 and the indexing operation rod 202 are operated by the locking force by the switching operation to switch between the normal position and the inverted position (the state of FIG. 9). At the same time, when the train enters from the backward direction B, the index operation rod 202 and the lock operation rod 201 are operated by the wheels of the train against the locking force to switch between the normal position and the reverse position. (See, for example, Japanese Utility Model Publication No. 48-24089).

[0004]

On the other hand, in order to reduce noise and maintenance, demand for long rails on railway lines is increasing. Along with this, a branching device called an elastic point or a long point is used in a line branch when a long rail is used. This branching device uses long tongue rails 301 and 302 as shown in FIG. 7, and is localized (the state shown by the solid line in FIG. 7).
In the state, the fixed portion 30 surrounded by a dotted line on one side thereof
3 is fixed on the floorboard. Therefore, when the tongue rail is in the reverse position (the state indicated by the dotted line in FIG. 7), the elastic force acting on the tongue rails 301 and 302 themselves is always applied to the close side rail 101. That is, FIG.
Are provided so as to slide on the point floor plate using the spring action of the tongue rails 301 and 302 without providing the heel portion 105 shown in FIG.

[0005] In the above-mentioned branching device, the tongue rail is preferably converted to the contact side rail 101 (localized), but if the tongue rail is converted to the open side rail 102 (inverted), the tongue rails 301 and 3 are used.
Since 02 has an elastic force, an elastic repulsive force always acts in the contact side direction. Therefore, in the case of a line branch having the above-structured branching device, when a conversion device having a back-facing indexing function as shown in FIG. 9 is installed, there are the following problems. In order to cancel the spring action of the tongue rail in the reverse position, it is necessary to increase the locking force acting on the contact side, and as a result, the tongue rail 301 is pressed against the contact side rail 101 with a strong force in the localized state, 301 may be deformed. When the locking force acting on the close contact side of the conversion unit 110 is increased, the indexing force increases in proportion to the locking force in the localized state. That is, the force for releasing the lock of the above-mentioned lock mechanism is also increased, and there is a possibility that the conversion force due to the indexing force is insufficient and the conversion failure occurs. Therefore, in a line branch having an elastic point (long point), a conversion device having a backward indexing function cannot be used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a conversion device having a structure that enables backward indexing even when used in a line branch having an elastic point (long point). And

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is provided between a contact side rail and an opening side rail, and is connected to a slidable contact side operation rod and an opening side operation rod. A switching device having a pair of tongue rails for switching between a normal position in contact with the contact side rail and a reverse position in contact with the open side rail, comprising: a contact side link, an open side link, and an L-shaped crank. I have it. The contact side link is rotatably connected on one side to the contact side operation rod. The opening side link has one side rotatably connected to the opening side operation rod. The L-shaped crank has a substantially L-shape, and is fixed so as to be rotatable around the L-angle apex. Then, the distal ends of a pair of sides forming an L-shape of the L-shaped crank are rotatably connected to the other end of the contact side link and the other end of the opening side link, respectively. A link drive mechanism is formed to lock the orientation or the inversion when one side and the contact side link are linearly arranged, and a connecting piece continuously connected to the L-shaped crank at a diagonal position of the L-shaped right-angled portion. And a pressing means for applying a pressing force to the connecting piece.

[0008]

According to the present invention, a link driving mechanism is constituted by the contact side link, the opening side link and the L-shaped crank, and the locking is performed when one side of the L-shaped crank and the contact side link are linearly arranged. When the elastic force is generated on the tongue rail as in the case of a long-point branching device, the elastic force acts on the contact-side operating rod, the contact-side link, and the L-shaped crank. It can be canceled by the pressing force applied by the pressing means to the connecting piece connected to the U-shaped crank.

Further, since this pressing force also acts in a direction in which one side of the L-shaped crank and the close contact side link are maintained in a straight line, the lock can be prevented from coming off, and the lock can be securely held. I do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, parts having the same configuration as those in FIGS. 6 to 9 are denoted by the same reference numerals. A pair of basic rails composed of the contact side rail 101 and the opening side rail 102 are laid, and a pair of tong rails composed of the contact side tong rail 301 and the opening side tong rail 302 are installed between the basic rails. I have. Both the basic rail and the tongue rail are formed of long rails, and the tongue rails 301 and 302 are provided with fixing portions fixed on the floor plate at the end side of the branch line as shown in FIG. Close contact side tong rail 301
L-shaped tie bar 2a is provided on the tip side of the
Is fixed, and an L-shaped tie bar 2b is fixed to the distal end side of the opening-side tong rail 302 via a connecting plate 1b. The tie bar 2b on the opening side is connected to the tie bar 2a on the contact side.
And a convex portion 2c formed on the upper surface of the tie bar 2b is loosely fitted in a long hole 2d formed in the diver 2a, and is positioned on the side wall of the long hole 2d in a localized state (FIG. 1). 2
Diver 2a and diver 2b are connected so that c contacts.

A switch rod 3a is fixed to the diver 2a on the close side, and the switch rod 3a is connected to the operating rod 4 on the close side, so that the force from the operating rod 4 is transmitted to the diver 2a and The tongue rail 301 is brought into close contact with the contact side rail 101. Similarly, a switch rod 3b is fixed to the diver 2b on the opening side, and the switch rod 3b is connected to the operating rod 5 on the opening side, so that the force from the operating rod 5 is transmitted to the diver 2b so as to be in close contact with the diver 2b. The tongue rail 301 is configured to be separated (opened) from the contact side rail 101.
The pair of tong rails 301 and 302 are
In addition, the operation of the opening-side operation rod 5 causes the anti-branch side to move from the fixed branch side (the fixing portion 303 in FIG. 7).

Next, a link mechanism which is a characteristic configuration of the present invention will be described. As shown in FIG. 2, a guide groove 11 is formed on the bottom surface 10 of the case of the conversion device, and a slider 12 is arranged so that the guide groove 11 can slide in the direction of the back surface of FIG. 2 (the left-right direction of FIGS. 1 and 3). Have been. As shown in FIG. 3, a long hole 13 is formed at the center of the slider 12, and fitting portions 14 and 15 are formed at both ends. In addition, connecting fittings 16, 17 are formed on the slider 12, and the connecting fittings 16, 17 are fitted into the grooves 4 a, 5 a provided on the bottom surfaces of the contact side operation rod 4 and the opening side operation rod 5, respectively. Close operating rod 4 or open operating rod 5
And the slider 12 can be moved in conjunction with each other. A fixing bracket 18 is mounted on the stick-side operation rod 4 on the rail side with respect to the slider 12.
The drive pin 19 is fixedly fitted to the fitting portion 14 on the rail side of the slider 12. Further, a fixing bracket 20 is attached to the opening-side operation rod 5 on the side opposite to the rail with respect to the slider 12 at a position which is slightly longer than the slider length with respect to the fixing bracket 18. The fixed drive pin 21 is fitted to the fitting portion 15 on the side opposite to the rail of the slider 12, and the drive pins 19 and 2 are
The sliders 12 are configured to sandwich the slider 12 between them.

One end of a long piece-like contact-side link 22 is axially mounted on a drive pin 19 fixed to a fixing member 18 of the contact-side operation rod 4, and the contact-side link 22 is centered on the drive pin 19.
Are rotatably connected. Similarly, the opening side operation rod 5
One end of a long piece-shaped opening side link 23 is axially attached to the drive pin 21 fixed to the
The opening side link 23 is rotatably connected to the center. The other ends of the contact side link 22 and the opening side link 23 are
The L-shaped crank 24 is axially attached to the tips of a pair of sides forming an L-shape by connecting pins 25, 25, respectively. L
The mold crank 24 has an isosceles triangular shape with an L-shaped apex at a right angle, and a connecting piece 26 connected to the L-shaped crank 24 is formed at a diagonal position of the L-shaped right angle. . The L-shaped right angle portion is axially mounted on the central shaft 27, and the central shaft 2
Numeral 7 is inserted into the long hole 13 of the slider 12, and its tip is configured to penetrate the case bottom surface 10 and be fixed. Therefore, the contact side operation rod 4 or the opening side operation rod 5
The L-shaped crank 24 is rotatable about the center axis 27 by the horizontal movement of the L-shaped crank 24.
A link drive mechanism that operates as in (a), (b), and (c) is formed.

A compression spring 28 as a pressing means is mounted on the connecting piece 26 at a diagonal position 26a with respect to the L-shaped right-angled portion of the L-shaped crank 24.
4 is pressed to the opening-side operation rod side 5. The other end of the compression spring 28 is, as shown in FIG.
It is fixed to an arbitrary position of the case body on an extension of the central axis 27 orthogonal to the operating rods 4 and 5. When one side of the L-shaped crank 24 and the contact side link 22 are linearly arranged on the opening side operation rod 5 (FIG. 3A), the L-shaped crank 24 and the contact side link 22 are pressed by the compression spring 28. The stopper 29 is formed at an appropriate position on the opening side operation rod 5 so that the opening side operation rod 5 does not bend.
Similarly, when one side of the L-shaped crank 24 and the opening side link 23 are linearly arranged on the opening side operation rod 5 (FIG. 3).
In (c)), the stopper 30 is formed at an appropriate position on the opening-side operation rod 5 so that the L-shaped crank 24 and the opening-side link 23 do not bend toward the opening-side operation rod 5 due to the pressing force of the compression spring 28. ing.

Further, on one side of the slider 12, there is formed a toothed portion 31 having continuous irregularities. The toothed portion 31 meshes with the groove 33 of the conversion gear 32, thereby converting between linear motion and rotational motion. Is performed. Conversion gear 32
Is configured to mesh with the intermediate pinion 34 and transmit the forward / reverse rotational motion of the motor 39 via the intermediate gear 35, the spur gear 36, the bevel gear 37, and the motor pinion 38 coaxial with the intermediate pinion 34. I have.

Next, the tong rail 3 by the above converting device
The operation of switching between the localization and the inversion of 01 and 302 will be described. When switching from the normal position to the reverse position shown in FIG. 1, the L-shaped crank 24, the contact side link 22, and the opening side link 23 have a positional relationship (localized state) shown in FIG. When a torque is applied from the motor 39 in this state, the torque of the motor 39 is transmitted as linear motion to the slider 12 via the conversion gear 32, and the slider 12 and the opening-side operation rod 5 move to the left. When the fitting portion 15 of the slider 12 pushes the drive pin 21 to move the opening side link 23 to the left, the end of the L-shaped crank 24 is pulled, and the L-shaped crank 24 rotates about the center axis 27. Accordingly, the other end of the L-shaped crank 24 pushes up the contact side link 22, the drive pin 19 moves leftward, and the contact side operation rod 4 moves (FIG. 3).
(B)).

When a rotational force is further applied from the motor 39,
One side of the L-shaped crank 24 and the opening-side link 23 are linearly arranged (FIG. 3C), and are locked in an inverted position. At this time, the L-shaped crank 24 and the opening-side link 23 come into contact with the stopper 30 by the pressing force of the compression spring 28, so that the opening-side operation rod 5 (downward) is not bent. Further, the pressing force of the compression spring 28 acts in a direction to maintain that one side of the L-shaped crank 24 and the opening side link 23 are linearly arranged (a component of the compression spring 28 in a direction perpendicular to the operation rod). ),
The lock is secured by preventing the lock from coming off. Further, in the state of the inverted position (FIG. 3C), the tongue rail 30
An elastic force toward the contact side rail 101 is generated at 1, 302, but this elastic force can be canceled by a component in the operating rod direction of the compression spring 28, and it is not necessary to apply an excessive locking force. .

When switching from inversion to localization, L
The mold crank, the contact side link and the opening side link are shown in FIG.
When the motor 39 is rotated in the reverse direction from this state, one side of the L-shaped crank 24 and the contact side link 22 are linearly arranged through FIG. 3 (a)), locked in a stereotaxic state.

In the above, the operation of locking by the rotational force of the motor 39 has been described. However, in the case of rearward indexing, the operation of the close-side operation rod 4 or the opening-side operation rod 5 is reversed from the normal position or vice versa. A conversion takes place.
When indexing the tongue rail 301 on the contact side in the backward direction, the divers 2a and 2b play with play as described above (so that the convex portion 2c abuts on the side wall of the elongated hole 2d in the normal position (FIG. 1)). Since they are connected, first, the contact side tong rail 301 and the contact side operation rod 4 move, and the switching operation is performed after the convex portion 2c comes into contact with the side wall on the opposite side of the elongated hole 2d. That is, after the contact-side operation rod 4 moves independently, the opening-side operation rod 5 connected to the diver 2b and the switch rod 3b moves, and the movement of the opening-side operation rod 5 causes the slider 12 to move. The drive pin 21 abutting on 15 moves, and thereafter, a change from localization to inversion is performed by the above-described operation. By providing play between the diver 2a and the diver 2b, the opening-side operation rod 5 is operated with a delay relative to the close-side operation rod 4,
This is to obtain a structure in which the opening operation rod 5 moves after the lock is securely released and a structure in which the lock is prevented from being released by a slight movement of the close operation rod 4.

In the line branch of the above embodiment,
Since it is a long point (elastic point) using a long rail, it is necessary to consider the elastic reaction force generated on the tongue rails 301 and 302 in the localization state shown in FIG. That is, in the localization state,
A locking force capable of locking is acting against the elastic force generated on the tongue rails 301 and 302 at the above-described reverse position, but this force is prevented from becoming unnecessarily large as described above. Also, since the link mechanism releases the lock by rotation of the L-shaped crank 24, the lock in the rearward indexing can be released with less force than the conventional example (FIG. 9). Therefore, it is possible to provide a conversion device having a back-facing indexing function even at a long point.

The operating characteristics of the opening-side operating rod 5 (the contact-side operating rod 4) with respect to the contact-side operating rod 4 (the opening-side operating rod 5) in the above embodiment are as follows. , The drive pin 2 of the opening side link 23
1 and the distance between the connecting pin 25 and the center axis 27 of the L-shaped crank 24 and the distance between the connecting pin 25. That is, the description will be made with reference to FIG.
2, the distance between the drive pin 19 and the connection pin 25 of the opening side link 23 is 1 L, the distance between the drive pin 21 of the opening side link 23 and the connection pin 25 is 1 K, the center axis 27 of the L-shaped crank 24 and each connection pin 25.
Is 1L, the opening side stroke SF of the opening side operation rod 5 satisfies the following relational expression. However, it is assumed that 1L> 1K.

SF = (lL + lK) − {(lL−lK × lK) = (lL + lK) −fo} fo = {(lL−lK × lK)} Using the opening side stroke SF as a variable, In order to obtain the contact stroke SR, the area aF of the triangle formed by the opening link 22 and the apex of the L-shaped crank 24 is calculated from the distance lL and the distance lK and the opening stroke SF (variable). The base of the triangle is determined by the change of the side stroke, and the height lHF of the triangle is calculated by back calculation from the area. That is, the area aF of the above-described triangle is expressed as follows: aF = √ (Z−1L) × (Z−1K) × (Z− (SF +
fo)) where Z = (lL + lK + SF + fo) / 2 When the height of the triangle on the opening side is obtained by back calculation from the area, lHF = 2 × aF / (SF + fo), and the height of the triangle on the close contact side is obtained. = √ (lK × lK-lHF × lHF).

Accordingly, the contact side stroke SR is given by SR = (lK + lL)-(） (lK × lK−lHR × lHR) + √ (lL × lL−lHR × lHR)), and lHR = √ (lHR) Substituting 1K × 1K−1HF × 1HF and rearranging, the relational expression between the stroke on the contact side and the stroke on the opening side is: SR = (lK + lL) −lHR−√ (lL × lL−lHR × lH)
R) Therefore, if the opening side stroke SF (variable) is changed linearly, the contact side stroke SR changes like a quadratic curve.

A link mechanism satisfying the above conditions is manufactured,
FIG. 5 shows a graph in which the contact-side stroke of the contact-side operating rod 4 is measured when the opening-side stroke of the opening-side operating rod 5 is changed. That is, when a stroke (opening side stroke) is given to the opening side operation rod, the opening side operation rod moves in proportion to the stroke, but the stroke amount of the close side operation rod changes in a quadratic curve. When a stroke (opening stroke) is given to the opening-side operating rod, the locked contact-side operating rod is gradually released, and operates with a slight delay as the opening-side stroke increases, finally catching up with the operating stroke. The amount will be the same. As described above, since the stroke on the contact side can be changed in a quadratic curve with respect to the stroke on the opening side, the time difference from when the lock is securely released to when the operation rod 5 on the opening side moves is reduced. There is an effect that can be obtained by the lock mechanism.

According to the above-described embodiment, the contact side link 22,
Since the link mechanism is constituted by the opening side link 23 and the L-shaped crank 24, by changing each of the above-described distances, the opening side operation rod 5 (the contact side operation rod) with respect to the close side operation rod 4 (the opening side operation rod 5) is changed. The operation characteristics of 4) can be changed, and conversion devices having various operation characteristics can be easily designed.

[0026]

According to the present invention, a link driving mechanism is constituted by the contact side link, the opening side link and the L-shaped crank, and the lock is provided when one side of the L-shaped crank and the contact side link are linearly arranged. When the elastic force is generated on the tongue rail as in the case of a long-point branching device, the elastic force is adjusted to the contact-side operation rod, the contact-side link, and L.
Although acting on the L-shaped crank, this elastic force can be canceled by the pressing force applied by the pressing means to the connecting piece continuously connected to the L-shaped crank. Therefore, even in a branching device which needs to consider an elastic reaction force, such as a long point, the locking force in the localized state can be suppressed, and a back-side indexing function can be provided.

Further, the pressing force of the pressing means also acts in a direction in which one side of the L-shaped crank and the close side link are maintained in a straight line. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view showing one embodiment of a conversion device of the present invention.

FIG. 2 is an explanatory cross-sectional view of a link mechanism of the conversion device.

FIGS. 3A, 3B, and 3C are explanatory plan views showing the operation of a link mechanism of the conversion device.

FIGS. 4A, 4B, and 4C are explanatory diagrams for calculating a stroke amount of a link mechanism of the conversion device.

FIG. 5 is a graph showing a relationship between operation strokes of a contact operation rod and an opening operation rod in a conversion device.

FIG. 6 is an explanatory diagram showing a point portion in a branch line.

FIG. 7 is an explanatory diagram showing a point portion in a branch line using a long rail.

FIG. 8 is an explanatory plan view of a conventional conversion device.

FIG. 9 is an explanatory plan view of a conventional conversion device having a backside indexing function.

[Explanation of symbols]

 Reference numeral 4: Close-side operating rod 5 ... Open-side operating rod 12 ... Slider 19, 21 ... Drive pin 22 ... Close-side link 23 ... Open-side link 24 ... L-shaped crank 25 ... Connecting pin 26 ... Connecting piece 27 ... Center shaft 28 ... Compression spring (pressing means) 32 ... Conversion gear 39 ... Motor 101 ... Contact side rail 102 ... Opening side rail 301 ... Contact side tong rail 302 ... Opening side tong rail 303 ... Fixed part

Continuation of front page (56) References JP-A-6-127389 (JP, A) JP-A-3-295901 (JP, A) JP-A-5-278610 (JP, A) JP-A-60-131363 (JP) , A) JP-A-60-131362 (JP, A) JP-A-62-88661 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B61L 5/00-5/10 B61L 7/00-7/08 B61L 11/00-11/02 E01B 7/00

Claims (1)

(57) [Claims] 1. A fixed position which is installed between a contact side rail and an opening side rail and is slidably connected to the contact side operation rod and the opening side operation rod, and which comes into contact with the contact side rail and the opening side rail. A switching device having a pair of tongue rails for performing a switching between a contacting side link and a contacting side link having one side rotatably connected to the contacting side operation rod; An opening-side link having one side rotatably connected thereto; and an L-shaped crank having a substantially L-shape and fixed to be rotatable around an L-shaped apex portion. The tip ends of a pair of sides forming a letter are rotatably connected to the other end of the contact side link and the other end of the opening side link, respectively. Oriented or inverted chain when placed Forming a link driving mechanism for performing the following, forming a connecting piece continuously connected to the L-shaped crank at a diagonal position of the L-shaped right angle portion, and providing a pressing means for applying a pressing force to the connecting piece. Conversion equipment characterized.