JPH09310706A - Locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking device to properly lock a protection plate to a support frame body and facilitate macroscopic confirmation of a locking result even at a limited space. SOLUTION: A slide cylinder 4 is longitudinally movably and non-rotatably fitted in a body case 2 and a cam groove 6 is arranged on the outer periphery of a slide cylinder 4 at an angle with a longitudinal direction. A locking shaft 13 from which a guide protrusion 9 inserted in a cam groove 6 is protruded at an intermediate part is inserted in a slide cylinder 4 and rotatably and axially immobily mounted on the body case 2. A ball receiving hole 15 to contain a small ball 14 for coupling is arranged on the locking shaft 13 and a peripheral groove 16 engaged with a part of the small ball 14 for coupling is formed in a stop pin 17. A stop pin 17 contained in a pin receiving hole 31 communicated with the bottom of the receiving hole 8 of a tool for rotation operation, and a lock hole 19 is energized for forward movement through the force of a spring 18 and a lock hole 19 engaged with a part of the small ball 14 for coupling is formed in the slide cylinder 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device such as a protective plate and an inspection port cover plate provided on a side surface portion or a bottom surface portion of a railway vehicle.

[0002]

2. Description of the Related Art Equipment installed on the bottom side of a railway vehicle is highly likely to be damaged or polluted by the inclusion of snow from the track surface or flying stones. It is desirable to install a lid on the inspection port.

However, when the protective plate or the cover plate is attached to the equipment box or the support frame on the vehicle body side by conventional fasteners or the like, the space between the track surface and the protective plate or the like is narrowed, and the worker Since there is almost no room to slip under the stopper, it is not possible to visually check the success or failure of locking the protective plate with the stopper and the integrity of the locked state. It will be accompanied by new anxiety about the accident of falling.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to enable a protective plate and the like to be accurately locked to a support frame, and to ensure the success or failure of locking and the integrity of the locked state even in a narrow space. It is an object of the present invention to provide a locking device that can be easily checked with the naked eye.

A further object of the present invention is to provide a locking device which can lock the locking shaft non-rotatably in the locking position and prevent unauthorized unlocking of the protective plate and unexpected loosening of the stopper plate. .

[0006]

[MEANS FOR SOLVING THE PROBLEMS] Hereinafter, referring to the reference numerals in the accompanying drawings, in the locking device of the present invention, a regulating projection 3 protruding from an inner peripheral surface of a body case 2 is provided as a sliding cylinder. 4 is inserted into a regulation groove 5 provided in the front-rear direction on the outer peripheral surface of the sliding cylinder 4, and the sliding cylinder 4 is fitted in the main body case 2 so as to be movable in the front-rear direction and non-rotatable. A cam groove 6 having an angle with respect to the front-rear direction is provided on the front end of the rotary operation tool 7
Is provided with a tool receiving hole 8 into which a guide projection 9 that is inserted into the cam groove 6 of the sliding cylinder 4 is provided in the middle portion, and a locking metal plate 12 is fixed to the rear end portion of the locking shaft 13. It is fitted inside the sliding cylinder 4 and is mounted on the main body case 2 so as to be rotatable and immovable in the front-rear direction.

The locking pin 13 is provided with a ball receiving hole 15 for accommodating the connecting small ball 14, and the stop pin 17 is provided with a circumferential groove 16 with which a part of the connecting small ball 14 is engaged. The pin 18 is accommodated in the pin receiving hole 31 communicating with the bottom of the receiving hole 8, and the stop pin 17 is urged to move forward by the spring 18 accommodated in the pin receiving hole 31 to connect the sliding cylinder 4 to a part of the connecting small ball 14. Is provided with a locking hole 19.

In the locked state, the sliding cylinder 4 is attached to the main unit case.
The entire length is accommodated in the sleeve 2, and the connecting small ball 14 has the locking shaft 13
Since the ball receiving hole 15 and the lock hole 19 of the sliding cylinder 4 are engaged with each other, the locking shaft 13 is connected to the sliding cylinder 4. The sliding cylinder 4 is non-rotatably restrained with respect to the main body case 2 by the restriction projection 3 of the main body case 2 engaging with the restriction groove 5 of the sliding cylinder 4, and as a result, the locking shaft. 13 is also non-rotatably restrained with respect to the main body case 2.

To open and unlock an object such as the protective plate 1,
The rotary operation tool 7 is inserted into the tool receiving hole 8 of the locking shaft 13 and the stop pin 17 is pushed inward. As a result, the connecting small ball 14 moves inward, and the ball receiving hole 15 of the locking shaft 13 is moved.
And the circumferential groove 16 of the stop pin 17 are engaged with each other, so that the rotation restraint of the locking shaft 13 with respect to the main body case 2 is released. In this state, when the rotation operating tool 7 is rotated in a predetermined direction and the locking shaft 13 is rotated, the sliding cylinder 4 which is prevented from rotating due to the engagement of the restriction protrusion 3 and the restriction groove 5 has the cam groove 6 and the guide projection. The cam action of 9 moves forward, and the front end portion projects to the front surface side of the main body case 2. The stopper plate 12 that has moved integrally with the locking shaft 13 is the support frame body 10.
The protective plate 1 can be opened because it is detached from the side receiving money 11.

To close and lock the protective plate 1, the protective plate 1 is pressed against the support frame 10 and the rotary operation tool 7 is attached to the locking shaft 1.
It is pushed into the tool receiving hole 8 of No. 3 and rotated in a predetermined direction. As a result, the sliding cylinder 4 is guided by the cam groove 6 and the guide projection 9 to move rearward, and the entire body including the front end portion is retracted into the main body case 2. The stopper plate 12 rotates integrally with the locking shaft 13, and firmly engages while pushing the catch 11 forward. After the sliding cylinder 4 has completely entered the body case 2, when the rotary operation tool 7 is pulled out from the tool receiving hole 8 of the locking shaft 13,
Since the stop pin 17 is advanced to the normal position by the urging force of the spring 18, the connecting small ball 14 moves outward. Thus, the connecting small ball 14 engaged with both the circumferential groove 16 of the stop pin 17 and the ball receiving hole 15 of the locking shaft 13 straddles the ball receiving hole 15 and the lock hole 19 of the sliding cylinder 4. To engage, the locking shaft 13 is connected to the sliding barrel 4 and the locking shaft 1
3 is non-rotatably restrained with respect to the main body case 2.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a cylindrical body case 2 is fitted into a mounting hole 20 provided in a protective plate 1 from the front side, and a mounting nut 21 is attached to the body case from the rear side. It is fixed to the protective plate 1 by screwing it onto the male screw portion 22 of No. 2. The set nut 21 is prevented from loosening by pressing a set screw 23 screwed in the diametrical direction of the set nut 21 against the body case 2. The front surface portion of the main body case 2 is formed as an inclined surface so as to conform to the side surface shape of the target railway vehicle. A waterproof O-ring 33 is inserted between the locking shaft 13 and the main body case 2, and a waterproof O-ring 34 is inserted between the sliding cylinder 4 and the main body case 2. A C-ring 3 for retaining is provided in the middle of the locking shaft 13.
2 is installed. The restriction protrusion 3 has a radial through hole 36.
The pin body is inserted into the pin body, and the retaining pin 35 is driven into the pin body.

Two restricting projections 3 and restricting grooves 5 for restricting the sliding cylinder 4 so that it cannot rotate relative to the main body case 2 and for guiding the sliding cylinder 4 in the front-rear direction are provided diametrically opposite to each other. ing. The cam groove 6 and the guide projection 9 for driving the sliding cylinder 4 in the front-rear direction with respect to the locking shaft 13 are diametrically opposed to each other.
It is provided individually. Biasing spring 18 for stop pin 17
A compression coil spring is used for. Stop pin 1
The circumferential groove 16 of 7 is formed in a stepped V shape, and the front and rear inner wall surfaces formed on the slope move the connecting small balls 14 outward or inward to partially lock the sliding cylinder 4. It acts as a cam surface when engaging or disengaging the hole 19.

A hexagonal wrench is used as the rotary operation tool 7, and the insertion hole 8 at the front end of the locking shaft 13 is a hexagonal recess. A square shaft portion 24 and a screw rod portion 25 are formed at the rear end portion of the locking shaft 13, and the stopper plate 12 is non-rotatably fitted into the square shaft portion 24 through a square hole 26 at the base end portion. The stopper plate 12 is fixed to the locking shaft 13 by fitting a washer 27 and a hexagonal nut 28 on the lock plate 13. By inserting the snap pin 30 into the pin hole 29 provided in the distal end portion of the screw rod portion 25 in the diametrical direction, the hexagon nut 28
To prevent loosening.

[0014]

As described above, in the locking device of the present invention,
A front end of the slide cylinder 4 is moved forward by the cam groove 6 and the guide protrusion 9 when the lock operation shaft 7 is unlocked by the rotation operation tool 7 when the slide cylinder 4 that is not rotatable with respect to the main body case 2 is unlocked. Since the portion is projected to the front side of the main body case 2, whether the object such as the protective plate 1 is locked or unlocked is indicated by the protruding state of the sliding cylinder 4, and the narrow space. However, it can be easily confirmed with the naked eye.

Also, in the locked state, the locking shaft 13 is non-rotatably restrained by the connecting small ball 14 that engages with the ball receiving hole 15 of the locking shaft 13 and the locking hole 19 of the sliding cylinder 4. Unauthorized unlocking and unintentional loosening of the stopper plate 12 can be prevented, and the protective plate 1 and the like can be used without fear of falling accidents.

[Brief description of drawings]

FIG. 1 is a front view of a protective plate locking device according to an embodiment of the present invention.

FIG. 2 is a rear view of the locking device for the protective plate.

FIG. 3 is a right side view of the locking device for the protective plate.

FIG. 4 is a view showing the locking device for the protective plate in a locked state.
FIG. 9 is a sectional view taken along line AA of FIG.

FIG. 5 is a view of the locking device for the protective plate in an unlocked state.
FIG. 9 is a sectional view taken along line AA of FIG.

[Fig. 6] Fig. 1 in a locked state of the locking device for the protective plate.
FIG. 6B is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protective plate 2 Main body case 3 Control protrusion 4 Sliding cylinder 5 Control groove 6 Cam groove 7 Tool for rotation operation 8 Tool receiving hole 9 Guide protrusion 10 Support frame 11 Receiving 12 Locking metal plate 13 Locking shaft 14 Small for connection Ball 15 Ball receiving hole for locking shaft 16 Circumferential groove for stop pin 17 Stop pin 18 Stop pin biasing spring 19 Locking hole for sliding cylinder 20 Mounting hole for protective plate 31 Pin receiving hole for locking shaft

Claims (1)

[Claims] 1. A sliding case 4 is inserted into a regulating groove 5 provided on the outer peripheral surface of a sliding cylinder 4 in the front-rear direction so that the sliding cylinder 4 can be fitted to the sliding case 4. -It is fitted in the sleeve 2 so as to be movable in the front-rear direction and non-rotatably, the cam groove 6 having an angle with respect to the front-rear direction is provided on the outer periphery of the sliding cylinder 4, and the rotary operation tool 7 is provided at the front end portion. A tool receiving hole 8 to be inserted is provided, a guide projection 9 is inserted in the middle portion so as to pass through the cam groove 6 of the sliding cylinder 4, and a locking shaft 13 having a stopper metal plate 12 fixed to the rear end portion is slid. It is fitted in the moving barrel 4 and is mounted on the main body case 2 so as to be rotatable but immovable in the axial direction, and the locking shaft 13 is provided with a ball receiving hole 15 for accommodating the connecting small balls 14, thereby providing a small connecting ball. A stop pin 17 provided with a circumferential groove 16 with which a part of the ball 14 is engaged is housed in a pin receiving hole 31 communicating with the bottom of the tool receiving hole 8, and the stop pin 17 is pinned. A locking device provided with a locking hole 19 which is biased forward by a spring 18 housed in a receiving hole 31 and in which a part of the connecting small ball 14 is engaged with the sliding cylinder 4.