JPH07304453A - Conversion device - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a conversion device having a structure that enables backward indexing even when used in a line branch having an elastic point (long point). [Structure] A link drive mechanism is configured by the close-contact side link 22, the opening-side link 23, and the L-shaped crank 24, and is configured to lock when one side of the L-shaped crank and the close-contact side link are linearly arranged. Therefore, when the elastic force is generated in the tongue rail like a long-point switch, the elastic force acts on the close contact side operating rod, the close contact side link, and the L-shaped crank. By canceling by the pressing force applied by the compression spring 28 to the continuously connected pieces, the locking force in the localization state is suppressed even in a branching device that needs to consider the elastic reaction force like a long point. It has a backward indexing function.

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 a conversion structure for an electric switching machine used in railroad track branching, and in particular, backward indexing is possible even in track branching 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-vehicle conversion device or an electric switching machine has a contact side rail 101 in a line branch consisting of a main line and a branch line.
The tongue rails 103 and 104 are arranged between a pair of basic rails composed of the opening side rail 102 and the opening side rail 102, and the tongue rails move in an arc shape around the fulcrum (heel portion) 105 on the point floor plate, 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 the orientation (solid line state in FIG. 6) or the inverted (dotted line state in FIG. 6). The conversion device having the above structure is, for example, as shown in FIG.
A connecting rod 1 is provided on the tip side of the pair of tongue rails 103, 104, and an operating rod 106 for generating a force required for point conversion is connected.
07, and a lock rod 108 for detecting a lock is connected via a switch adjuster 109. Then, the electric conversion operation of the conversion unit 110 mechanically locks and performs conversion.

In the conversion device, there is a conversion device capable of backward indexing, which is mainly used for line branching in a local railway. For example, as shown in FIG. 9, this conversion device includes a pair of tongue rails 103, 10
Locking rod 201 for generating the force necessary for point conversion, and indexing rod 2 for receiving the indexing force on the tip side of 4.
02 are connected via connecting rods 203, and when the train enters from the opposite direction A, it is localized or inverted by locking by electric conversion operation by the conversion unit 110, and from the back direction B It is configured so that it can be automatically indexed when a train enters. That is, the locking operation rod 201 and the indexing operation rod 201 are the conversion unit 11
A locking mechanism that interlocks via a cam or the like is formed within 0, and the locking operation rod 201 and the indexing operation rod 202 are operated by the locking force due to the conversion operation to switch between the normal position and the inverted position (state in FIG. 9). At the same time, when the train enters from the back direction B, the wheels of the train actuate the indexing rod 202 and the locking rod 201 against the locking force to switch between the normal position and the reverse position. (For example, see Japanese Utility Model Publication No. 48-24089).

[0004]

On the other hand, in order to reduce noise and maintenance, there is an increasing demand for long rails on railroad tracks. Along with this, branching devices called elastic points or long points are used in line branching when using long rails. As shown in FIG. 7, this branching device uses long tongue rails 301 and 302, and localizes (state of solid line in FIG. 7).
In this state, the fixed portion 30 on one side surrounded by a dotted line
3 is fixed on the floor board. Therefore, when the tongue rail is set in the inverted position (indicated by the dotted line in FIG. 7), the elastic force acting on the tongue rails 301 and 302 itself is always applied to the contact side rail 101. That is, FIG.
It is configured to slide on the point floor plate by utilizing the spring action of the tongue rails 301 and 302 without providing the heel portion 105 shown in FIG.

The branching device described above is good in converting the tongue rails to the close contact side rails 101 (localization), but when converting to the opening side rails 102 (reverse position), the tongue rails 301, 3 are formed.
Since 02 has an elastic force, the elastic repulsive force always acts in the close contact side direction. Therefore, in the line branch having the branching device having such a structure, when the conversion device having the backward indexing function as shown in FIG. 9 is installed, the following problems occur. In order to cancel the spring action of the tongue rail in the inverted position, it is necessary to increase the locking force acting on the close contact side. As a result, the tongue rail 301 is strongly pressed against the close contact side rail 101 in the localization state, and The 301 may be deformed. When the locking force applied to the contact side of the conversion portion 110 is increased, the indexing force also increases in proportion to the locking force in the stereotactic state. That is, the unlocking force of the above-described locking mechanism also becomes large, and the conversion force due to the indexing force may be insufficient, causing a conversion failure. Therefore, in the line branch having the elastic point (long point), the conversion device having the backward indexing function cannot be used.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a conversion device having a structure that enables backward indexing even when used in a line branch having elastic points (long points). And

[0007]

In order to solve the above-mentioned problems, the present invention is installed between a contact side rail and an opening side rail, and is connected to a slidably movable contact side operation rod and opening side operation rod. Then, a conversion device having a pair of tongue rails for switching between a normal position in contact with the close contact side rail and a reverse position in contact with the open side rail, wherein the close contact side link, the open side link, and the L-shaped crank are provided. It has. One side of the close contact side link is rotatably connected to the close contact side operating rod. One side of the opening side link is rotatably connected to the opening side operating rod. The L-shaped crank is substantially L-shaped and is rotatably fixed around the L-shaped apex. Then, the tip end sides of the pair of sides forming the L-shape of the L-shaped crank are rotatably connected to the other end side of the close contact side link and the other end side of the opening side link, respectively. A link driving mechanism for locking or locking the side when the one side and the contact side link are linearly arranged is formed, and a connecting piece continuously connected to the L-shaped crank at a diagonal position of the L-shaped right angle portion. It is characterized in that it is provided with a pressing means for applying a pressing force to the continuous piece.

[0008]

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

Further, since this pressing force also acts in the direction in which one side of the L-shaped crank and the contact side link are linearly arranged, the lock can be prevented from coming off and the lock can be reliably secured. To 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 configurations as those in FIGS. 6 to 9 are designated 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 tongue rails composed of the contact side tongue rail 301 and the opening side tongue rail 302 are installed between the basic rails. There is. Both the basic rail and the tongue rail are long rails, and the tongue rails 301 and 302 are provided with a fixing portion fixed on the floor plate on the end side of the branch line, as shown in FIG. 7. Adhesion side tongue rail 301
L-shaped tie bar 2a is provided on the front end side of the plate through a connecting plate 1a
Is fixed, and an L-shaped tie bar 2b is fixed to the front end side of the opening-side tongue rail 302 via a connecting plate 1b. The tie bar 2b on the opening side is the tie bar 2a on the close contact side.
The convex portion 2c formed on the upper side of the tie bar 2b is loosely fitted in the long hole 2d formed in the diver 2a, and the convex portion is formed on the side wall of the long hole 2d in the orientation (FIG. 1). Two
The diver 2a and the diver 2b are connected so that c contacts.

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

Next, the 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 as to be slidable in the guide groove 11 in the rear surface direction of FIG. 2 (left and right direction of FIGS. 1 and 3). Has been done. 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, respectively. Further, connecting fittings 16 and 17 are formed on the slider 12, and the connecting fittings 16 and 17 are fitted into the groove portions 4a and 5a provided on the bottom surfaces of the close contact side operating rod 4 and the opening side operating rod 5, respectively. Close contact side operating rod 4 or opening side operating rod 5
And the slider 12 are configured to be movable in conjunction with each other. A fixing metal fitting 18 is mounted on the close contact side operating rod 4 on the rail side with respect to the slider 12, and the fixing metal fitting 18 is attached.
The drive pin 19, which is fixed to, is fitted and arranged in the fitting portion 14 on the rail side of the slider 12. Further, a fixing bracket 20 is attached to the opening side operating rod 5 on the side opposite the rail 12 with respect to the slider 12 at a position separated from the fixing bracket 18 by a distance slightly longer than the slider length. The fixed drive pin 21 is fitted and arranged in the fitting portion 15 on the side opposite to the rail of the slider 12, and the drive pins 19 and 2
The slider 12 is sandwiched between the two.

One end of a long piece-shaped contact side link 22 is axially attached to the drive pin 19 fixed to the fixing member 18 of the contact side operation rod 4, and the contact side link 22 is centered around the drive pin 19.
Are rotatably connected. Similarly, the opening side operating rod 5
One end of a long piece-shaped opening side link 23 is axially attached to the drive pin 21 fixed to the fixing bracket 20 of the drive pin 21.
The opening-side link 23 is rotatably connected around 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 by connecting pins 25, 25 to the distal ends of a pair of sides forming the L-shape. L
The die crank 24 has a shape of an isosceles triangle having an L-shaped apex portion 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 portion. . Further, the L-shaped right angle portion is axially attached to the central shaft 27.
7 is inserted into the long hole 13 of the slider 12, and its tip is configured to penetrate through the case bottom surface 10 and be fixed. Therefore, the close-side operating rod 4 or the opening-side operating rod 5
The horizontal movement of the L-shaped crank 24 allows the L-shaped crank 24 to rotate about the center shaft 27.
A link drive mechanism that operates as in (a), (b), and (c) is formed.

Further, a compression spring 28 as a pressing means is attached to the connecting piece 26 which is located at a diagonal position 26a with respect to the L-shaped crank 24 at the right-angled portion, and the L-shaped crank 2 is provided.
4 is pushed toward the opening side operating rod side 5. As shown in FIG. 1, the other end of the compression spring 28 is
It is fixed to an arbitrary position of the case body on an extension line of the central shaft 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-type crank 24 and the contact side link 22 are pressed by the pressing force of the compression spring 28. A stopper 29 is formed at an appropriate position on the opening-side operating rod 5 so that the opening 29 does not bend toward the opening-side operating rod 5.
Similarly, when one side of the L-shaped crank 24 and the opening-side link 23 are linearly arranged on the opening-side operating rod 5 (see FIG. 3).
In (c), a stopper 30 is formed at an appropriate position of the opening-side operating rod 5 so that the L-shaped crank 24 and the opening-side link 23 are not bent toward the opening-side operating rod 5 by the pressing force of the compression spring 28. ing.

Further, a toothed portion 31 having continuous irregularities is formed on one side of the slider 12, and the toothed portion 31 meshes with the groove portion 33 of the conversion gear 32 to convert linear motion and rotary motion to each other. Is configured to do. Conversion gear 32
Is configured to mesh with the intermediate pinion 34 and to 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 which are coaxial with the intermediate pinion 34. There is.

Next, the tongue rail 3 by the above conversion device
The switching operation between the localization and the inversion of 01 and 302 will be described. When the orientation is switched from the orientation shown in FIG. 1 to the inversion, the L-shaped crank 24, the contact side link 22 and the opening side link 23 have the positional relationship (orientation state) shown in FIG. 3A. When a rotational force is applied from the motor 39 in this state, the rotational force of the motor 39 is transmitted as a linear motion to the slider 12 via the conversion gear 32, and the slider 12 and the opening side operation rod 5 move leftward. When the fitting portion 15 of the slider 12 pushes the drive pin 21 and moves the opening side link 23 to the left, the end portion of the L-shaped crank 24 is pulled, and the L-shaped crank 24 rotates about the central shaft 27. Along with that, the other end of the L-shaped crank 24 pushes up the close contact side link 22, the drive pin 19 moves leftward, and the close contact side operating 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 pressing force of the compression spring 28 causes the L-shaped crank 24 and the opening-side link 23 to come into contact with the stopper 30 so that the L-shaped crank 24 and the opening-side link 23 are not bent toward the opening-side operating rod 5 (downward). Further, the pressing force of the compression spring 28 acts in a direction in which one side of the L-shaped crank 24 and the opening side link 23 are linearly arranged (a component in a direction orthogonal to the operating rod of the compression spring 28). ),
The lock is secured by preventing the lock from coming off. Moreover, in the state of reversal (FIG. 3C), the tongue rail 30
1, 302 has an elastic force toward the close contact side rail 101 side, but this elastic force can be canceled by the component of the compression spring 28 in the direction of the operating rod, and it is not necessary to give an unnecessary locking force. .

When switching from inversion to localization, L
The die crank, the contact side link and the opening side link are shown in FIG.
The positional relationship is as shown in (c). 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 as shown in FIG. 3 (a)), locked as a stereotactic state.

Although the operation of locking by the rotational force of the motor 39 has been described above, the backward indexing is reversed from the normal position by the operation of the close contact side operating rod 4 or the opening side operating rod 5 or vice versa. The conversion takes place.
When the contact-side tongue rail 301 is indexed backward, the diver 2a and the diver 2b have a play as described above (so that the convex portion 2c abuts the side wall of the long hole 2d in the orientation (FIG. 1)). Since they are connected, the contact side tongue rail 301 and the contact side operation rod 4 move first, and the conversion operation is performed after the convex portion 2c abuts the side wall on the opposite side of the elongated hole 2d. That is, after the contact side operating rod 4 moves independently, the opening side operating rod 5 connected to the diver 2b and the switch rod 3b moves, and the slider 12 moves due to the movement of the opening side operating rod 5 and the fitting portion. The drive pin 21 that abuts 15 moves, and thereafter, the normal position is reversed to the reverse position by the above-described operation. By providing play between the diver 2a and the diver 2b, the opening side operation rod 5 is delayed relative to the close contact side operation rod 4 to operate.
This is to obtain a structure that allows the opening-side operation rod 5 to move after the lock is reliably released, and a structure that prevents the lock from being released by a slight movement of the contact-side 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 in the tongue rails 301 and 302 in the localization state shown in FIG. That is, in the localization state,
In the above-mentioned inversion, there is a locking force that can lock against the elastic force generated in the tongue rails 301 and 302, but this force is prevented from becoming unnecessarily large as described above. Further, since the link mechanism that releases the lock by rotating the L-shaped crank 24 is used, it is possible to release the lock in the back indexing with less force compared to the conventional example (FIG. 9). Therefore, it is possible to obtain a conversion device having a backward indexing function even at long points.

The operation characteristics of the opening-side operation rod 5 (contact-side operation rod 4) with respect to the contact-side operation rod 4 (open-side operation rod 5) in the above-mentioned embodiment are the same as those of the drive pin 19 and the connecting pin 25 of the contact-side link 22. Distance, drive pin 2 of opening side link 23
1 and the connecting pin 25, and the distance between the central shaft 27 of the L-shaped crank 24 and the connecting pin 25. That is, referring to FIG. 4, the contact side link 2 described above will be described.
2, the distance between the drive pin 19 and the connection pin 25 is 1L, the distance between the drive pin 21 of the opening side link 23 and the connection pin 25 is 1K, the central shaft 27 of the L-shaped crank 24 and each connection pin 25.
If the distance between and is 1L, the following relational expression holds for the opening side stroke SF of the opening side operating rod 5. However, it is assumed that 1L> 1K.

SF = (lL + lK) -√ (lL-lK × lK) = (lL + lK) -fo {fo = √ (lL-lK × lK)} The opening side stroke SF is used as a variable of the close side operating rod 4. In order to obtain the close-side stroke SR, the area aF of the triangle formed by the vertices of the opening-side link 22 and the L-shaped crank 24 is calculated by the distances lL and 1K and the opening-side stroke SF (variable), and the opening is calculated. The base of the triangle is obtained by the change of the side stroke, and the height lHF of the triangle is calculated by back calculating from the area. That is, the area aF of the above-mentioned triangle is as follows: aF = √ (Z−lL) × (Z−1K) × (Z− (SF +
fo)) However, if Z = (1L + lK + SF + fo) / 2 is calculated back from the area to obtain the height of the triangle on the opening side, then lHF = 2 × aF / (SF + fo), and the height of the triangle on the contact side is calculated as = √ (lK × lK−lHF × lHF)

Therefore, the contact side stroke SR becomes SR = (lK + lL)-(√ (lK × lK-1HR × lHR) + √ (lL × lL-1HR × lHR)), and 1HR = √ ( lK × lK−lHF × lHF) and rearranged, the relational expression between the contact side stroke and the opening side stroke is SR = (lK + lL) −lHR−√ (lL × lL−lHR × lH
R). Therefore, when 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 operation rod 4 when the opening side stroke of the opening side operation rod 5 is changed is measured. That is, when a stroke (opening side stroke) is applied to the opening side operating rod, the opening side operating rod moves in proportion to the stroke, but the stroke amount of the close contact side operating rod changes in a quadratic curve. In addition, when a stroke (opening side stroke) is given to the opening side operating rod, the locked close contact side operating rod is gradually released, and the opening side stroke increases with a slight delay, and finally the operating stroke catches up. The amount will be the same. In this way, the stroke on the close side can be changed in a quadratic curve with respect to the stroke on the opening side. Therefore, there is a time difference from the release of the lock reliably to the movement of the operating rod 5 on the opening side. There is an effect that can be obtained with the locking mechanism section.

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

[0026]

According to the present invention, the link drive mechanism is constituted by the close-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 close-contact side link are linearly arranged. Since the elastic force is generated in the tongue rail like a long-point switch, the elastic force is applied to the contact side operating rod, the contact side link, and the L side.
Although it acts on the V-shaped crank, this elastic force can be canceled by the pressing force applied by the pressing means to the connecting piece connected to the L-shaped crank. Therefore, even in a branching device that needs to take elastic reaction force into consideration, such as a long point, the locking force in the localization state can be suppressed, and a back indexing function can be provided.

Further, the pressing force of the pressing means also acts in the direction in which one side of the L-shaped crank and the contact side link are maintained in a linear arrangement, so that the lock can be prevented from coming off, and the lock can be locked. It is possible to obtain a conversion device that ensures that.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of a conversion device of the present invention.

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

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

4 (a), (b) and (c) are explanatory views for calculating a stroke amount of a link mechanism portion of a conversion device.

FIG. 5 is a graph showing the relationship between the operation strokes of the close contact side operation rod and the opening side operation rod in the 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 a plan view of a conventional conversion device.

FIG. 9 is a plan view of a conventional conversion device having a back indexing function.

[Explanation of symbols]

 4 ... close contact side operation rod 5 ... opening side operation rod 12 ... sliders 19 and 21 ... drive pin 22 ... close contact side link 23 ... opening side link 24 ... L-shaped crank 25 ... connecting pin 26 ... connecting piece 27 ... central shaft 28 ... Compression spring (pressing means) 32 ... Conversion gear 39 ... Motor 101 ... Adhesion side rail 102 ... Opening side rail 301 ... Adhesion side tongue rail 302 ... Opening side tongue rail 303 ... Fixed part

Claims (1)

[Claims] 1. A positioning device that is installed between a close contact side rail and an opening side rail and is connected to a close contact side operation rod and an opening side operation rod that are slidable, and contacts the close contact side rail and the opening side rail. A contact device having a pair of tongue rails for switching between an inversion position and a contact side link whose one side is rotatably connected to the contact side operation rod, and an opening side operation rod. An opening side link rotatably connected to one side, and an L-shaped crank that is substantially L-shaped and is rotatably fixed about an L-shaped apex portion, and the L-shaped crank has an L-shaped crank. The tip end sides of the pair of sides forming a letter are rotatably connected to the other end side of the contact side link and the other end side of the opening side link, respectively, and one side of the L-shaped crank and the contact side link are linear. A chain that is oriented or inverted when placed A link drive mechanism for performing the above-mentioned operation is formed, a connecting piece connected to the L-shaped crank is formed at a diagonal position of the L-shaped right angle portion, and pressing means for applying a pressing force to the connecting piece is provided. Characterizing conversion device.