JPH0214613Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking device for a transport vehicle, and more particularly to a locking device for a transport vehicle configured to prevent the door of the transport vehicle from being opened in the event of an accident.

2. Description of the Related Art Transport vehicles have been known in the past, on which various types of cargo can be placed and the cargo can be transported by pushing the cargo by hand.

A conventional transport vehicle of this type has a double door in a part thereof, and a locking device with a bar structure is attached to this door.

This locking device includes a pair of left and right locking frames, and a bolt frame that is slidably fitted into through holes formed in these locking frames.

However, in the past, in order to facilitate locking and unlocking operations, there was a large clearance between the through hole provided on the locking frame side and the rod of the bolt frame, and the lock was removed by an amount corresponding to this clearance. The door has a tendency to rattle and open slightly.

Therefore, if the cargo loaded in the transport vehicle tilts or collapses, a large force is applied to the double door, and due to the above-mentioned clearance, the door that tends to open will be forced to open further. When a force that tries to do this is applied and vibration etc. are added to this,
The double doors may open and the loaded cargo may fly out of the transport vehicle, leading to a serious accident.

The present invention has been made to eliminate the above-mentioned drawbacks of the conventional methods, and it provides a lock for a transport vehicle that is configured so that it cannot be opened unless an unlocking operation is performed, even if the locking device has a bar structure. The purpose is to provide equipment.

Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 and subsequent figures are for explaining one embodiment of the present invention. The transport vehicle, which is designated as a whole by reference numeral 1 in the figures, has a quadrilateral base 2, and the left and right sides and back side of this base 2 are Side frames 3, 3 and a back frame 4, which are formed into a quadrilateral frame shape from steel pipes or the like, are fixed in an upright state.

Further, the base frame 2 is formed in a quadrilateral shape, and casters 5 are provided on the lower surfaces of the four corners of the base frame 2, respectively.

On the other hand, left and right opening/closing frames 7, 8 constituting a double door are attached via hinges 6 near the upper and lower ends of the left and right outer frames 3, 3 so as to be openable and closable.

As shown in FIG. 1, the left and right opening/closing frames 7, 8 are rectangular frames made of steel pipes or the like, and the outer edges of the opening/closing frames 7, 8 are attached to the hinge 6 so as to be openable and closable. ing.

Also, stoppers 7a, 8a are provided at the lower ends of the opening/closing frames 7, 8 to contact the outer edges of the base frame 2, and are configured to prevent the opening/closing frames 7, 8 from opening toward the inside of the carrier. ing.

Horizontal frames 9 and 10 are installed horizontally near both ends of the left and right opening/closing frames 7, 8 and slightly below the center, respectively, and these horizontal frames 9, 10 also serve as reinforcement for the opening/closing frames 7, 8. .

A locking frame as shown in FIG. 8 is attached to each of these horizontal frames 9 and 10.

That is, the locking frame 11 attached to the horizontal frames 9 and 10 on one side of the opening/closing frame 7 is formed in an F shape when viewed from above as shown in FIG. It has a fixing plate 11a to be fixed, and two projecting pieces 11b, 11b projecting outwardly from the fixing plate 11a in parallel.
Through holes 11c are formed in opposing positions in 1b and 11b, respectively.

On the other hand, a locking frame 1 fixed to the other opening/closing frame 8 side
As shown in FIG. 8, 2 is formed into a substantially U-shape when viewed from the top, and includes a fixing plate 12a fixed to the horizontal frames 9 and 10, and a fixed plate 12a extending outward from both left and right ends at right angles. It has extending protrusions 12b, 12b, and through holes 12c are formed in opposing positions of these protrusions 12b, 12b, respectively.

The through holes 11c and 12c described above have the same diameter and are formed on the same straight line.

On the other hand, the bar frame 13 is 1 as shown in FIG.
It is formed by bending a real steel rod, and includes a straight rod 13a and a quadrilateral frame 1 continuous to it.
3b, which is continuous from approximately the center of the rod 13a and constitutes a part of the frame 13b.
A bent portion 13d is formed from the lower end of 3c, extending at right angles toward the locking frames 11 and 12, and further bent downward.

An auxiliary frame 14 is fixed to this bent portion 13d.

As shown in FIG. 8, this auxiliary frame 14 has a pair of frame bodies 14a, 14a formed in the shape of a letter "3" and arranged in vertically parallel planes. The open end faces toward the pipes 7b and 8b forming the inner sides of the pair of opening/closing frames 7 and 8.

One end of these two frames 14a, 14a is welded and fixed to the bent portion 13d, and the other end is connected to the connecting piece 14.
connected by b.

Moreover, the frame body 14a formed in the shape of the letter "3",
The inner diameters of the two arcuate portions 14c, 14c of the pipe 14a are approximately the same as the outer diameters of the pipes 7b, 8b.

Both ends of the arcuate portions 14c, 14c extend a predetermined distance from the outside of the pipes 7b, 8b toward the inside of the door when the door consisting of the left and right opening/closing frames 7, 8 is closed. .

Therefore, the arcuate portions 14c, 14c are connected to the pipe 7.
b, 8b, the arcuate portion 14c,
Both ends of the pipe 14c hit the outer arcuate surfaces of the pipes 7b, 8b and are elastically deformed in a state where they are pushed outward, and after climbing over the outer peripheral surfaces of the pipes 7b, 8b, they return to their original state and the pipes 7b, 8b can be held between both sides.

Next, a method of using the locking device configured as described above will be explained.

As shown in FIG. 6, the bolt frame 13 is attached to a U-shaped locking frame 12 which is welded to the horizontal frames 9 and 10 which are fixed to one side of the opening/closing frame 8.

That is, as shown in FIG. 6, the locking frame 12 is placed in contact with the pipe 8b forming the inner side of the opening/closing frame 8, and is fixed to the horizontal frames 9 and 10.

Then, the straight rod 13a of the bolt frame 13 is fitted into the through hole 12c of the locking frame 12.

At this time, the side 13c forming a part of the frame 13b
Only the bent portion 13d continuous thereto is located between the projecting pieces 12b, 12b of the locking frame 12. Therefore, the side 13d and the bent portion 13d are fixed by welding or the like after the rod 13a is fitted into the through holes 12a, 12a.

In this state, as is clear from FIG. 5, the auxiliary frame 14 rotates about the rod 13a as a fulcrum due to its own weight, and is positioned below the locking frame 12.

To lock the lock in this state, the opening/closing frames 7, 8 are closed, the bolt frame 13 is moved from the outside of the pipes 7b, 8b to the locking frame 11 on the opening/closing frame 7 side, and the transparent The tip of the rod 13a is fitted into the hole 11c. And frame 1
3b together with the auxiliary frame 14 in the direction away from the pipes 7b, 8b as shown in FIG.

Then, the arcuate portions 14c, 14c of the auxiliary frame 14
As described above, since both ends of the pipes 7b, 8b are shaped to wrap around from the outside to the inside, the ends of the arcuate parts 14c, 14c are elastically deformed so as to expand outward, and the pipes 7b, 8b
is held in the arcuate portions 14c, 14c.

In this state, the bolt frame 13 has both ends of the arcuate portions 14c, 14c of the auxiliary frame 14 connected to the pipes 7b, 8.
Since it is located inside pipes 7b and 8b
is held securely, and the left and right opening/closing frames 7 and 8 are in a straight line.

When the opening/closing frames 7 and 8 try to open in this state, the distance between the pipes 7b and 8b tends to increase, but the pipes 7b and 8b are held in a direction closer to each other by the arcuate parts 14c and 14c. It never opens.

Therefore, even if the cargo loaded in the transport vehicle 1 is dislodged and a force is applied to the opening/closing frames 7, 8 in the direction of opening, they will not open easily.

Therefore, it is possible to completely prevent accidents caused by the door opening as in the conventional case.

As is clear from the above explanation, according to the present invention, an auxiliary frame is provided on the bolt frame, and this auxiliary frame has a structure in which the pipe of the opening/closing frame is clamped during locking. Since the door does not shift and the opening/closing frame is locked, the door will not open even if a force is applied in the opening direction, and accidents due to cargo shifting will not occur.

[Brief explanation of the drawing]

The figure is for explaining one embodiment of the present invention.
The figure is a front view, Figure 2 is a plan view, Figures 3 and 4.
The figure is an enlarged cross-sectional view taken along the line A-A in Figure 1, Figure 5 is an enlarged front view of the locking device, Figure 6 is a cross-sectional view taken along the line B-B in Figure 5, and Figure 7 is the main part showing the locked state. That is, FIG. 5 is a cross-sectional plan view taken along the line CC, and FIG. 8 is an exploded perspective view. 1... Transport vehicle, 2... Base, 3... Side frame, 4...
...Back frame, 7, 8... Opening/closing frame, 7b, 8b... Pipe, 9, 10... Horizontal frame, 11, 12... Locking frame, 11b, 12b... Projection, 11c, 12c...
...Through hole, 13...Bar frame, 13a...Rod, 14...Auxiliary frame, 14a...Frame body, 14c...
...Arc-shaped part.

Claims (1)

[Scope of utility model registration request] It has left and right side frames 3, 3 and a back frame 4 on a base 2, and has a double door door consisting of left and right opening/closing frames 7, 8 on the side opposite to the back frame 4, and each opening/closing frame 7, In the locking device for a transport vehicle having a bar structure for locking 8, the locking device locks one opening/closing frame 7.
A locking frame 11 fixed to the other opening/closing frame 8, a locking frame 12 fixed to the other opening/closing frame 8, and through holes 11c, 12c formed in protrusions 11b, 12b of each locking frame 11, 12.
It consists of a bolt frame 13 having a rod 13a slidably fitted therein, and the bolt frame 13 has pipes 7b, 8b forming the inner sides of the opening/closing frames 7, 8.
The auxiliary frame 14 has a pair of upper and lower frames 14a formed approximately in the shape of a "3",
14a, and the inner diameter of the arcuate portions 14c, 14c constituting each frame 14a is approximately the same as the outer diameter of the pipes 7b, 8b, and both ends of the arcuate portions 14c, 14c are in a closed state. Pipe 7 in
A locking device for a transport vehicle, characterized in that the locking device is arranged so as to extend around the inside side of the door 8b.