JPH0659377U - Rail gripping device - Google Patents

Abstract

(57) [Summary] [Purpose] The rail being gripped is not dropped, maintenance is easy, and there is no accidental breakage of the engaging piece. [Structure] In a main body 21, a rail entry space 24 is formed so as to extend upward from a lower end of the main body, and engagement pieces 22, 22 that advance and retreat to the space 24 are formed in each of main body portions located on both outer sides of the space 24. In the rail gripping device having the pivots 26, 26, the engaging pieces 22, 22 respectively sway from the fall-down locking position A that stops in the space 24 to the standing-up standby position B outside the space 24. That is, the supine operation link mechanism 23 is pivotally supported so as to move, and is disposed outside the space 24 between the engagement pieces 22 and 22 and the main body 21.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a rail gripping device used when hoisting a rail for railroad.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, there is a rail rail lifting device shown in FIG. In this hoisting device 1, rail gripping devices 3, 3 are attached to both ends of a hoisting beam 2, and the hoisting beam 2 is hung on a hanger 4 by wire ropes 5, 5. This hoisting device 1 is hoisted with a hook 6 of a crane (not shown) hooked on a hoisting metal 4, and after the rails 7 are gripped by a rail gripping device 3 and 3, the hoisting device 1 is hoisted by operating the crane. The rail 7 is conveyed to a desired place.

As shown in FIG. 6, the rail gripping device 3 is formed with a space 10 for entering a rail, which is formed by cutting from a lower end 9 a of a main body 9 upward. In the main body 9, engagement pieces 11 and 11 that advance and retreat to the space 10 are pivotally supported 12 and 12 at main body portions located on both outer sides of the space 10. Solenoids 13, 13 are attached to the main body portion above the engaging pieces 11, 11. The output end 13 a of each solenoid 13 is connected to the upper end of the engagement piece 11 via a link 14. The solenoids 13 and 13 have their output ends 13a and 13a connected to each other by a separator 15.

A lock device 16 is provided between the solenoids 13, 13. The lock device 16 is composed of a solenoid (not shown) attached to the main body 9 and a lock piece 17 attached to the output end of this solenoid, and is arranged above the descended separator 15 (see FIG. 7A). By moving the lock piece 17 forward, the rising of the separator 15 is prevented and the engagement pieces 11, 11 are prevented from opening.

The work of gripping the rail 7 with the lifting device 1 (see FIG. 5) including the rail gripping devices 3 and 3 configured as described above is performed according to the following procedure. First, as shown in FIG. 6 (B), the solenoid of the lock device 16 is energized to release the lock, and then the solenoids 13 and 13 for opening and closing the engaging pieces are energized to pull up the separator 15 to engage. The pieces 11, 11 are opened, and the tip claws 11a, 11a are retracted from the space 10 to be in a standby state.

Next, the rail gripping device 3 in the standby state is moved to the upper side of the rail 7 by the operation of a crane (not shown) and then lowered, and the head portion 7 a of the rail 7 enters the space 10. Then, as shown in FIG. 3A, the energization of the solenoids 13 and 13 is cut off, the separator 15 is lowered, and the engaging pieces 11 and 11 are closed to move the tip claws 11a 1 and 11a into the space 10. Move forward. After that, the solenoid of the lock device 16 is turned off to move the lock piece 17 forward so that the lock piece 17 is locked to prevent the separator 15 from rising. When the rail gripping device 3 is lifted by a crane in this state, the rail 7 is lifted in a gripped state in which the tip claws 11a and 11a of the engaging pieces 11 and 11 are locked to the head lower surfaces 7b and 7b of the rail 7.

Subsequently, the rail 7 gripped by the rail gripping device 3 is moved upward by a crane operation, and then the rail gripping device 3 is lowered by the crane to place a rail at the desired position. Next, the solenoid of the lock device 16 is energized to release the lock, and then the solenoids 13 and 13 are energized to pull up the separator 15 to open the engaging pieces 11 and 11. Finally, the rail gripping device 3 in the standby state is lifted by a crane to complete one gripping work.

[0008]

[Problems to be solved by the device]

 However, the conventional rail gripping device 3 has the following problems. (A) Since the solenoids 13 and 13 are not energized while the rail is suspended, when the solenoid of the locking device 16 malfunctions or malfunctions, it is applied to the tip claws 11a and 11a of the engaging pieces 11 and 11. The engaging pieces 11 and 11 may be opened by the weight of the rail 7, and the rail 7 being gripped may be dropped. Falling of a very heavy rail 7 is very dangerous.

(B) When the rail 7 is suspended, a large external force such as an own weight of the rail 7 applied to the tip claws 11a, 11a of the engaging pieces 11, 11 and a shock is applied via the engaging pieces 11, 11. It is transmitted to the parator 15 and the lock piece 17. When this large force is cumulatively applied, fatigue breakage occurs in the separator 15 and the lock piece 17, and the rail 7 being gripped may be dropped.

(C) Since the solenoids 13 and 13 for opening and closing and the lock device 16 are provided, much labor is required for maintenance and inspection.

(D) The engagement pieces 11, 11 may be kept in a closed state due to a failure of the opening / closing solenoids 13, 13 or the solenoid of the lock device 16. At this time, when the rail gripping device 3 standing by above the rail 7 is lowered, the rail 7 collides with the tip claws 11a, 11a of the engagement pieces 11, 11 in the closed state. A breakage accident of 1a occurs.

In order to solve the above-mentioned problems, the present invention aims to provide a rail gripping device which does not drop a rail being gripped, is easy to maintain and inspect, and has no accidental breakage of an engaging piece. And

[0013]

[Means for Solving the Problems]

 According to the means adopted by the present invention, the main body is formed with a rail entry space cut upward from the lower end of the main body, and the main body parts located on both outer sides of this space are engaged with each other to advance and retreat to this space. In the rail gripping device in which the pieces are pivotally supported, each of the engagement pieces is laid on the back and forth from a fall-down locking position that stops inside the space to a standing-up standby position outside the space. A supine operation link mechanism is pivotally supported and is disposed outside the space between the engagement piece and the main body.

In the supine operation link mechanism, there may be provided a play in which the engaging piece in the receding locking position can receive an external force other than the mechanism to erect and swing to the stand-by standby position.

The fold-down operation link mechanism includes an intermediate member vertically slidably supported at a main body portion above the space, and an intermediate member disposed on both outer sides of the space and the engaging piece. A connecting member that is connected, a spring that is arranged between the intermediate member and the main body and urges the intermediate member downward, and a pull-up operation tool that is arranged between the intermediate member and the main body and pulls up the intermediate member. It may also be equipped with.

The rail entrance space may have a width dimension capable of maintaining the rail engagement state even when only one of the engagement pieces is in the rail engagement state.

A detector may be attached to the main body for confirming that the rail has entered the space for entering the rail so that the engaging piece can oscillate on the back and forth.

[0018]

[Action]

 When the rail that has entered the rail entry space is locked by the engagement piece and lifted up, a large moment acts on the engagement piece in the falling direction of the engagement piece due to the weight of the rail. The direction of this moment is opposite to the direction in which the engaging piece is raised. Therefore, the engagement piece does not move from the fallen locking position where it stops in the space, and maintains the locked state with respect to the rail.

When a play is provided in the supine operation link mechanism, even if the engaging piece that does not grip the rail descends and collides with the rail in the falling locking position, the engaging piece is locked in the falling position. Swing up from the position to the stand-by standby position.

When the fall-down operation link mechanism is provided with a spring for urging the intermediate member downward, when the pull-up operation tool is pulled down, the force of this spring forcibly pushes the intermediate member downward to engage it. Put the piece upright.

Even if only one of the engaging pieces is in the rail locking state, when the width of the rail entry space is such that the rail locking can be maintained, even if one of the engaging pieces is damaged, the rail engaging Stop is maintained.

When the detector is attached to the main body, it is possible to confirm that the rail has entered the space for entering the rail until the engaging piece is in a state where it can oscillate on the back and forth.

[0023]

【Example】

 Hereinafter, a rail gripping device according to the present invention (hereinafter, referred to as "main gripping device") will be described based on an embodiment shown in the drawings. 1 to 4 show an embodiment of the gripping device of the present invention, FIG. 1 is a side sectional view showing an unlocked state of an engaging piece, and FIG. 2 is a state in which the engaging piece can be locked. 3 is a front view showing the engagement state of the engagement piece, and FIG. 4 is a side view showing the suspension state of the engagement piece.

The gripping device 20 of the present invention is attached to both ends of the suspension beam 2 (see FIG. 3) one by one, as in the conventional case. As shown in FIG. 1, the grip device 20 of the present invention includes a main body 21 formed by joining steel plates by welding or the like, engagement pieces 22 and 22 pivotally supported on the lower side of the main body 21, and engagement pieces 22 and 22. And a supine operation link mechanism 23 for operating.

The main body 21 has a rail entry space 24 cut upward from the lower end thereof, and stoppers 25, 25 for the engaging pieces 22 are provided at the lower end thereof. The space 24 has a width W that can maintain the rail locked state even if only one of the engaging pieces 22 is in the rail locked state (not shown) due to some trouble or the like. Between the front and rear plates 21a and 21b of the main body 21, the engaging pieces 22 and 22 and the supine operation link mechanism 23 are arranged.

The engaging pieces 22, 22 are pivotally supported 26, 26 respectively on the main body portions located on both outer sides of the space 24, and come into contact with the stoppers 25, 25 to stop the inside of the space 24. It is designed so that it can lie down and oscillate from a fall locking position A (see FIG. 2) to a stand-by standby position B (see FIG. 1) outside the space 24.

The supine operation link mechanism 23 includes an intermediate member 28 that is vertically slidably supported 31 at a main body portion above the space 24, and an intermediate member 28 that is arranged on both outer sides of the space 24. Connecting members 29 and 29 connecting the engaging pieces 22 and 22, a spring 32 arranged between the intermediate member 28 and the main body 21 to urge the intermediate member 28 downward, and the intermediate member 28. A pull-up operation tool 30 that is disposed between the main body 21 and the intermediate member 28 is provided.

The pull-up operation tool 30 is one in which the output shaft 30a is advanced and retracted by supplying and discharging compressed air, rotating the electric motor forward and backward, or the like. The pull-up operation tool 30 is provided with an advancing / retreating position detector 33 including a limit switch or a proximity switch for detecting the advancing position and the retracting position. The pulling operation tool 30 and the intermediate member 28 are connected to each other by providing a play including a pin 34 and an elongated hole 35. This play is such that when the rail 7 collides with the engaging pieces 22 and 22 at the falling locking position A (see FIG. 2) when the rail 7 enters the space 24, the engaging pieces 22 and 22 are pulled up. This is the amount that can be raised and swung to the stand-by standby position B (see FIG. 1) without being restrained by the tool 30.

As shown in FIGS. 3 and 4, the rail 7 enters the space 24 in the front plate 21 a of the main body 21 so that the engaging pieces 22, 22 can lie on the back and forth. A detector 36 such as a limit switch or a proximity switch for confirming the above is attached. The detector 36 detects the entry position of the head 7a of the rail 7.

As shown in FIG. 3, the operation of gripping the rail 7 with the lifting device 37 provided with the gripping device 20 of the present invention at both ends of the hanging beam 2 (the drawing shows only one side) is performed according to the following procedure. First, as shown in FIG. 1, by retracting the output shaft 30a of the pulling-up operation tool 30 upward, the engaging pieces 22, 22 are made to stand by at the standing-standby position B.

Next, the gripping device 20 of the present invention in the standby state is moved to the upper side of the rail 7 by the operation of a crane (not shown) and then lowered, so that the head 7 a of the rail 7 enters the space 24. Even if the pull-up operation tool 30 malfunctions and the output shaft 30a is advanced downward, a play formed by the pin 34 and the long hole 35 and the like is formed at the connection portion between the pull-up operation tool 30 and the intermediate member 28. Since the rail 7 is provided, the rail 7 can push up the engaging pieces 22 and 22 to the stand-by standby position B and enter the space 24.

Subsequently, as shown in FIGS. 1 and 3, when the detector 36 (see FIG. 3) detects that the rail 7 has entered above the space 24, the output shaft 3 of the pull-up operation tool 30. 0a is advanced downward. Then, as shown in FIG. 2, the spring 32 urges the intermediate member 28 downward by its repulsive elastic force to lower the connecting members 29, 29, and brings the engaging pieces 22, 22 to the falling locking position A. Lie down. When the gripping device 20 of the present invention is lifted by the crane in this state, as shown in FIG. 4, the rail head lower surface 7b, 7b is formed on the rail head lower surface 7b, 7b with a gap of about 5 mm formed between the rail head 7a and the ceiling of the space 24. The rail 7 is lifted in a gripped state in which the tips of the engaging pieces 22 and 22 are locked. The detector 36 detects that a gap is formed between the rail head 7a and the ceiling of the space 24. Based on this detection, the pulling-up operation tool 30 is locked and becomes inoperative.

Subsequently, the rail 7 gripped by the gripping device 20 of the present invention is moved upward by a crane to a desired position, and then the gripping device 20 of the present invention is lowered by the crane to obtain the desired position as shown in FIG. Put the rail 7 in the place. Next, when the detector 36 detects that the gap between the rail head 7a and the ceiling of the space 24 is not formed, the output shaft 30a of the pull-up operation tool 30 is retracted upward as shown in FIG. The engagement pieces 22, 22 are made to stand by at the standing-up standby position B and the engagement pieces 22, 22 are opened. Finally, the gripping device 20 in the standby state is lifted by a crane to complete one gripping work.

The operation of the above procedure can be performed based on the output of a sequencer (not shown) provided in place, or can be a manual operation.

The gripping device 20 of the present invention is not limited to the above-mentioned configuration, and may be modified according to the embodiment. For example, although not shown in the drawing, the supine operation link mechanism 23 is changed as follows. Two lifting operation tools 30, 30 including air cylinders are attached to the main body 21, and the output shaft 30a of each lifting operation tool 30 and the engaging piece 22 are connected by the connecting member 29. In addition, the play of the connecting portion between the pull-up operation tool 30 and the intermediate member 28 is eliminated, and the spring 32 is omitted.

[0036]

[Effect of device]

 As described in detail above, the grip device of the present invention has the following practical effects. When the rail is locked by the engaging piece and lifted up, the engaging piece maintains the locked state with respect to the rail without moving from the fallen locking position where it stops in the space. As a result, the gripping device of the present invention can safely grab and lift the rail.

When the supine operation link mechanism is provided with play, even if the engaging piece that is not gripping the rail descends in the falling locking position, the engaging piece moves from the falling locking position to the stand-by standby position. Shake to erect. As a result, the gripping device of the present invention eliminates the accidental breakage of the engagement piece.

When the downturn operation link mechanism includes a spring for urging the intermediate member downward, the engaging piece can be forcibly set up. As a result, the gripping device of the present invention operates smoothly.

Even if only one of the engaging pieces is in the rail locking state, if the width of the rail entry space is such that the rail locking can be maintained, even if one of the engaging pieces is damaged, the rail engaging Stop is maintained. As a result, the gripping device of the present invention can safely grip and lift the rail.

When the detector is attached to the main body, the engagement piece is inserted into the space for entering the rail to a state where it can oscillate and the engagement piece is locked to the rail. You can confirm that. As a result, the gripping device of the present invention can be operated safely and smoothly.

The gripping device of the present invention does not require a locking device, so that the structure is simple and maintenance is easy.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a gripping device according to the present invention, showing an unlocked state of an engagement piece.

FIG. 2 is a side sectional view showing the same embodiment, showing the engagement state of the engagement pieces.

FIG. 3 is a front view showing the embodiment, showing a state in which the engagement piece can be locked.

FIG. 4 is a side view showing the embodiment, showing a suspended state of the engagement piece.

FIG. 5 is a front view showing a conventional rail lifting device.

6A and 6B show a conventional gripping device, in which FIG. 6A is a side sectional view showing a state in which the gripping device can be lifted up;
[Fig. 4] is a side sectional view showing an unlocked state of an engagement piece.

[Explanation of symbols]

 21 ... Main body 22 ... Engaging piece 23 ... Lie down operation link mechanism 24 ... Rail entry space 26 ... Pivot 28 ... Intermediate member 29 ... Connecting member 30 ... Lifting operation tool 32 ... Spring 36 ... Detector A ... Tilt-down locking Position B: Standing standby position

Front page continuation (72) Shinji Yamamoto, 2-4-24 Shibata, Kita-ku, Osaka City, West Japan Railway Company (72) Yoichi Nakajima 2-4-2-4, Shibata, Kita-ku, Osaka City, West Japan Passenger Railway Co., Ltd. (72) Creator Iwaki Shinobu 2-4-24 Shibata, Kita-ku, Osaka City West Japan Travel Passenger Railway Co., Ltd. (72) Yasushi Yoshida 2-4-2-4 Shibata, Kita-ku, Osaka City West Japan Travel Passenger Railway Co., Ltd. (72) Inventor Hideki Nakanishi 2-4-24 Shibata, Kita-ku, Osaka-shi West Japan Travel Co., Ltd. (72) Inventor Ken Ueki 3-8-20 Honjo Nishi, Kita-ku, Osaka Company Sanai

Claims (5)

[Scope of utility model registration request] 1. The main body is formed with a rail entry space cut upward from the lower end of the main body, and an engagement piece for advancing and retracting to and from the space is pivotally supported at each of the main body portions located on both outer sides of this space. In the rail gripping device described above, each of the engagement pieces is pivotally supported so as to oscillate in a supine manner from a fall-down locking position that stops in the space to a standing-up standby position outside the space, More outwardly between the engagement piece and the body,
A rail gripping device having a lie-down operation link mechanism. 2. The back-and-forth operation link mechanism is provided with a play in which an engaging piece at a fall-down locking position can receive an external force other than the mechanism to raise and swing to an upright standby position. Rail gripping device. 3. The fall-down operation link mechanism includes an intermediate member that is slidably supported in a main body portion above the space, and the intermediate member and the engaging piece that are disposed on both outer sides of the space. A connecting member that connects the intermediate member and a spring that is arranged between the intermediate member and the main body and urges the intermediate member downward; and a pulling-up operation that is arranged between the intermediate member and the main body and pulls up the intermediate member. The rail gripping device according to claim 1 or 2, further comprising a tool. 4. The rail-introducing space has a width dimension capable of maintaining the rail engagement state even when only one of the engagement pieces is in the rail engagement state.
Rail gripping device described. 5. A detector is attached to the main body for confirming that the rail has entered the space for entering the rail so that the engaging piece can oscillate on the back and forth. , 2, 3 or 4 rail gripping device.