JP2516774Y2 - Locking device for large trucks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a locking device applied to a large truck such as a truck for moving a large structure.

[Conventional technology]

 FIG. 7 shows an example of a conventional locking device for a large truck.

In FIG. 6, reference numeral 1 is a bogie, 2 is a wheel, 3 is a lock pin, 4 is a bearing, 5 is a seat, and 6 is a drive device for a lock pin. , Is attached to the upper end of the lock pin 3 set downward in the vertical direction via a link or the like.

A concave receiving seat 5 is installed and fixed on the upper surface of the trolley 1 at the predetermined stop position on the foundation side. At the same position, the drive device 6 lowers the lock pin 3 and inserts the lock pin 3 into the receiving seat 5, and then the drive device 6 is stopped and the lock is completed.

[Problems to be solved by the device]

By the way, in the conventional locking device for a large dolly as described above, the lock pin 3 on the dolly side and the recessed seat 5 on the base side are usually used.
A structural clearance (gap) is provided between each other at the joining portion at the time of insertion.

The clearance is such that the lock pin 3 can be inserted even if there is a relative positional error between the carriage stop position and the seat 5 when the lock pin 3 is inserted into the seat 5, and after the lock pin 3 is inserted. Is provided in order to allow a minute movement of the bogie 1 due to thermal expansion of the structure on the bogie 1, but to give an impact force to the bogie and the foundation against an external force such as an earthquake or a gust of wind. Become. Further, when a plurality of locking devices are provided for one large structure, due to a manufacturing error in the mounting position of the lock pin 3 and the receiving seat 5, a few locking devices of the plurality are actually used. It may be in a state where it only works.

The present invention addresses the above-mentioned problems, and an object of the present invention is to provide a lock device for a large dolly, which can be easily inserted when the lock pin is inserted and the clearance can be eliminated after the lock pin is inserted. .

[Means for solving the problem]

In the present invention, the following requirements are considered in order to deal with the above technical problems.

(1) A cylinder is arranged at the lower end of the lock pin, which is an engaging portion with the seat.

(2) A cylinder is equipped with a piston, and a pair of auxiliary lock mechanisms are installed in the front and rear of the cylinder so that wedge-shaped overhanging hardware that can be inscribed in the concave seat can be mounted via the piston rod. Allows sliding in the direction you want to fix.

(3) A return spring that keeps the piston in a neutral position is installed in the cylinder to give a restoring force to the piston rod with an overhanging metal member as an auxiliary lock pin.

(4) An oil passage with an orifice that connects the oil chambers contacting both ends of the piston to each other is provided, and the oil passage and the oil chamber are filled with hydraulic oil. The oil passage may communicate with the outside of the lock pin.

(5) In the middle of the oil passage, a rod with a return spring that crosses the oil passage and can slide up and down is provided, and a large diameter orifice and a small diameter orifice that can be aligned with the oil passage are formed on the rod. When the valve rod projects below the lock pin, the large-diameter orifice communicates with the oil passage, the lock pin descends to the inner bottom surface of the concave seat, and the valve rod is relatively moved. The small-diameter orifice is configured to communicate with the oil passage in the state of being raised.

That is, the lock device for a large trolley according to claim (1) of the present invention is provided so as to project from one of the trolley and the base side in order to stop and fix the large trolley at a predetermined position on the base side. A lock pin and a recessed seat which is provided on the other of the bogie and the foundation side and into which the lock pin can be inserted, and a clearance between the lock pin and the inner wall of the recessed seat is provided at the tip of the lock pin. It is characterized in that an auxiliary lock mechanism with a hydraulic damper to be loaded in is installed.

The lock device for a large dolly according to claim (2) of the present invention is the lock device for a large trolley according to claim (1), in which the auxiliary lock mechanism with a hydraulic damper is orthogonal to the lock pin in the tip portion of the lock pin. Cylinder provided in the direction
A piston slidably provided in the cylinder and kept in a neutral position by a return spring, a piston rod projecting from both ends of the piston toward the inner wall of the concave seat, and a piston rod of the piston rod. It is characterized in that it is provided with a wedge-shaped overhanging metal piece provided at the tip, and is provided with an oil passage with an orifice for communicating each oil chamber in contact with both ends of the piston in the cylinder with each other.

Further, the lock device for a large truck according to claim (3) of the present invention is the lock device for a large truck according to claim (2), wherein the oil passage with the orifice is elastically moved up and down perpendicularly to the oil passage. A valve rod with a return spring that can slide on the valve, a large-diameter orifice that is formed on the valve rod and that can always align with the oil passage, and the valve when the bottom end of the lock pin contacts the inner bottom surface of the recessed seat. It is characterized in that it is provided with a small-diameter orifice formed in the valve rod so as to be aligned with the oil passage as the rod relatively rises.

[Action]

In the lock device for a large truck of the present invention described above, before and during the insertion of the lock pin into the recessed seat, the pressure inside the cylinder before and after the piston becomes the same pressure through the large diameter orifice, and only the spring force is applied. Acts as a resisting force on the wedge-shaped overhanging hardware of the auxiliary lock mechanism, and when the lock pin that contacts the inner wall of the seat is about to reach the seat position, the wedge-shaped overhanging hardware is pushed, but the oil in the cylinder has a large diameter. Can flow smoothly through the orifice of the
The overhanging hardware can move smoothly along the inner wall of the seat.

Then, when the lock pin is completely inserted, the valve rod protruding from the lower end surface of the lock pin is pushed into the lower end surface of the lock pin by hitting the seat, and as a result, the small-diameter orifice of the same valve rod is joined with the oil passage. However, since the flow passage becomes narrow, the resistance becomes extremely large against the rapid movement of the piston in the cylinder such as during an earthquake or a gust of wind.
Therefore, the piston rod hardly moves relative to the lock pin, and the lock pin is held in the locked state by the overhanging metal object. In addition, since the resistance becomes small against the slow movement of the piston in the cylinder such as the displacement of the structure on the dolly due to temperature change, the piston can move slowly in the cylinder. The rod can change its position relative to the lock pin.

〔Example〕

FIG. 1 shows an outline of the structure of a locking device for a large truck as an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a large trolley for carrying a large structure and moving, 2 is a wheel, 3 is a lock pin, 4 is a bearing, 5 is a concave seat, 6 is a drive device for a lock pin, 7 Indicates a support for a large structure, and 9 indicates an auxiliary lock mechanism.

The upper end of the lock pin 3 movably attached to the dolly 1 via a bearing 4 is pin-coupled via a link or the like by a lock pin drive device 6 mounted on the dolly 1. .

A concave seat 5 is installed and fixed on the base side which is a predetermined stop position of the trolley 1, and the lock pin driving device 6 can lower the lock pin 3 and insert it into the seat 5. ing. A hydraulic damper-equipped auxiliary lock mechanism 9 is provided in the clearance between the lock pin 3 and the inner wall of the seat 5.

Next, the detailed structure of the tip of the lock pin 3 is shown in FIGS.

As shown in FIGS. 2 to 3, an auxiliary lock mechanism 9 is provided with a piston rod 9a, a wedge-shaped protruding metal member 9b, a piston 9c, etc. at the tip of the lock pin 3.
The piston 9c is slidably provided in the cylinder 10. Then, the piston 9c is kept in the neutral position by the return spring 11.

Cylinder 10 has lock pin 3 inside the tip of lock pin 3.
A wedge-shaped overhanging hardware 9b is attached to the tip of a piston rod 9a which is horizontally provided so as to be orthogonal to the piston 9c and protrudes from the front and rear ends of the piston 9c in the cylinder 10 toward the inner wall of the recessed seat 5, respectively. ing.

Then, as shown in FIG. 3, an oil passage 16 is provided for communicating the oil chambers 10a, 10a in contact with both ends of the piston 9c in the cylinder 10 with each other, and the oil passage 16 is slidable up and down orthogonally to the oil passage 16. A valve rod 15 with a movable return spring 19 is provided. (See FIG. 4) A large-diameter orifice 17 that is always aligned with the oil passage 16
(See FIG. 5) is formed on the valve rod 15, and when the lock pin 3 is pressed against the inner bottom surface of the seat 5, the valve rod 15 is relatively lifted by the compression of the return spring 19 as shown in FIG. A small diameter orifice 18 that can be aligned with the oil passage 16
The valve rod 15 is formed below the large-diameter orifice 17.

As shown in FIGS. 2 and 3, a guide rod 14 is projectingly provided on the wedge-shaped protruding hardware 9b, and the guide rod 14 is fitted into a guide hole 14a formed at the lower end of the lock pin 3. There is. Reference numeral 12 in FIGS. 2 and 3 indicates a cylinder receiver, and 13
Indicates an O-ring.

Since the lock device for a large dolly of the present invention is configured as described above, the lock pin 3 is kept in a state of being lifted upward so that the running of the dolly 1 is not hindered. When the vehicle is stopped and fixed at a predetermined position on the foundation, the lock pin 3 is lowered by the drive device 6 toward the recessed seat 5 on the foundation side aligned with the lock pin 3. Then, the auxiliary lock mechanism 9 at the tip of the lock pin 3
The wedge-shaped protruding metal 9b comes into contact with the upper inside of the seat 5. At this time, the valve rod 15 is in an unloaded state, the large-diameter orifice 17 communicates with the oil passage 16, and the working oil easily flows from one oil chamber 10a to the other oil chamber 10a, so that it is integrated with the piston 9c. The piston rod 9a and the wedge-shaped overhanging hardware 9b can freely move back and forth, so that the lock pin 3 is inserted into the seat 5 without resistance.

When the lower end of the lock pin 3 comes into contact with the inner bottom surface of the seat 5, the valve rod 15 relatively rises while compressing the return spring 19, so that the small diameter orifice 18 is aligned with the oil passage 16. As a result, resistance corresponding to the flow rate of the hydraulic oil is generated.

Therefore, in the case where a gentle movement occurs when the large structure on the trolley 1 is deformed due to a temperature change, the piston rod 9a integral with the piston 9c and the wedge-shaped protrusion are formed even when the small diameter orifice 18 allows the hydraulic oil to pass therethrough. The hardware 9b moves relative to the lock pin 3 cylinder 10 without any hindrance,
As a result, the lock pin 3 can move freely within the clearance of the seat 5, but if a sudden movement is caused as in the event of an earthquake or a gust of wind, the hydraulic oil in the small diameter orifice 18 becomes large. The distribution resistance exerts a function as a hydraulic damper, and the piston 9c of the auxiliary lock mechanism 9 cannot move suddenly with respect to the lock pin 3 and a locking action is performed.

Next, when the lock device is released, as the drive device 6 raises the lock pin 3 slightly,
When the valve rod 15 is separated from the inner bottom surface of the recessed seat 5, the return spring 19 causes the lower end portion of the valve rod 15 to project below the lower surface of the lock pin 3, and the oil passage 16 in the auxiliary lock mechanism 9 is restored again. It comes to communicate with the large diameter orifice 17.

Therefore, the piston 9c, the piston rod 9a, and the wedge-shaped overhanging hardware 9b can freely move back and forth while receiving only the spring force of the return spring 11, whereby the lock pin 3 can be smoothly pulled out from the recessed seat 5. .

In the conventional locking device for large trucks, due to the clearance between the lock pin and the seat, slow movement changes such as impact force or thermal expansion during an earthquake or strong wind will cause damage, resonance, etc. In the present embodiment, the action of the auxiliary lock mechanism with a hydraulic damper provided at the lower end of the lock pin 3 causes the action of the lock pin 3 to be inserted into or removed from the recessed seat 5 to be large in the orifice of the oil passage 16. The communication at 17 allows the lock pin 3 to be smoothly engaged and disengaged while receiving only the minimum spring force of the return spring 11.

When the lock pin 3 is locked in the seat 5, the small-diameter orifice 18 at the lower end of the lock pin 3 plays a role of a hydraulic damper, so that the lock pin 3 can be horizontally moved within the seat 5.

Further, against a sudden movement such as an earthquake or a strong wind, the lock pin 3 can be sufficiently fixed and held by the flow resistance of the hydraulic oil in the small diameter orifice 18.

In the above-described embodiment, the lock pin 3 is provided on the trolley 1 and the concave seat 5 is provided on the base side. However, the trolley 1 is provided with the concave seat 5 and the lock pin 3 is provided on the base side.
May be provided so as to project.

[Effect of device]

As described above in detail, according to the locking device for a large truck of the present invention, the following effects and advantages are obtained.

(1) As described in claim (1), since the tip end portion of the lock pin is provided with an auxiliary lock mechanism with a hydraulic damper that is loaded in the clearance between the lock pin and the concave seat. , While ensuring a smooth operation of engaging and disengaging the lock pin with respect to the concave seat, it is possible to suppress the sudden motion during an earthquake or strong wind and maintain a sufficient lock function. .

(2) Since the auxiliary lock mechanism with the hydraulic damper has the configuration according to claim (2), the action of the lock pin at the initial stage of insertion and the initial stage of withdrawal of the lock pin with respect to the recessed seat is the large diameter of the oil passage. Due to the communication at the orifice, the operation is performed lightly while receiving only the force of the return spring of the piston.

(3) Since the oil passage with the orifice in the auxiliary lock mechanism with the hydraulic damper has the configuration according to claim (3), switching between the large diameter orifice and the small diameter orifice in the oil passage is locked. Due to the relative relationship of the pin with the recessed seat, this is done properly and automatically through the up and down movement of the valve rod.

[Brief description of drawings]

1 to 6 show a locking device for a large dolly as one embodiment of the present invention. FIG. 1 is a side view thereof, and FIG.
FIG. 3 is an enlarged side view of the portion A in FIG. 3, FIG. 3 is an enlarged bottom view of the portion A in FIG. 1, FIG. 4 is a sectional view taken along the line BB in FIG. 3, and FIG. A front view and FIG. 6 are cross-sectional views showing an operating state of the above device corresponding to FIG.
The figure is a side view of a conventional locking device for a large truck. 1 ... Car, 2 ... Wheels, 3 ... Lock pin, 4 ... Bearing, 5 ... Concave seat, 6 ... Drive device for lock pin, 7
…… Support base, 9 …… Auxiliary lock mechanism, 9a …… Piston rod, 9b …… Wedge-shaped overhanging hardware, 9c …… Piston, 10…
… Cylinder, 10a …… Oil chamber, 11 …… Return spring, 12 …… Cylinder receiving, 13 …… O ring, 14 …… Guide rod, 14a…
… Guide hole, 15… Valve rod, 16… Oil passage, 17… Large diameter orifice, 18… Small diameter orifice, 19… Return spring.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Toshio Muraki 7-14 Wadamiyadori, Hyogo-ku, Hyogo-Kobe Nishiryo Engineering Co., Ltd. (56) Bibliography Sho 51-28631 (JP, U) Actual Kaisho 62-71243 (JP, U)

Claims (3)

(57) [Scope of utility model registration request] 1. A lock pin projecting from one of the trolley and the foundation side so as to stop and fix the large trolley at a predetermined position on the foundation side, and the lock pin provided on the other of the trolley and the foundation side. An auxiliary lock mechanism with a hydraulic damper, which is provided with a recessed seat into which the lock pin can be inserted, and which is mounted in the clearance between the lock pin and the inner wall of the recessed seat at the tip of the lock pin. Locking device for large trucks characterized by. 2. A cylinder in which the auxiliary lock mechanism with a hydraulic damper is provided in a tip portion of the lock pin in a direction orthogonal to the lock pin, and a neutral position by a return spring slidably provided in the cylinder. And a piston rod that is projecting from both ends of the piston toward the inner wall of the concave seat, and a wedge-shaped overhanging piece provided at the tip of the piston rod. The lock device for a large trolley according to claim (1), characterized in that it is provided with an oil passage with an orifice for communicating the oil chambers in contact with both ends of the piston with each other. 3. A valve rod with a return spring, in which the oil passage with the orifice is capable of elastically sliding up and down perpendicularly to the oil passage, and a valve rod formed on the valve rod, which can always be aligned with the oil passage. A large-diameter orifice and a small-diameter orifice formed in the valve rod so that when the lower end of the lock pin abuts the inner bottom surface of the recessed seat, the valve rod is aligned with the oil passage as the valve rod is relatively raised. The locking device for a large trolley according to claim (2), characterized in that the locking device is provided.