JPH0113012Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side gate for a truck bed, and more particularly to a locking device for a gate that slides up and down to open and close.

Conventionally, from the standpoint of rationalizing transportation and saving labor in cargo handling, for example, so-called vertical gates, in which gates open and close vertically, have been adopted in delivery vehicles that often carry out cargo handling work on narrow roads. These gates were kept locked by gate lock devices installed at the corners of each gate, and had the troublesome drawback that the gate locks had to be manually unlocked and locked each time cargo was handled.

The purpose of this invention is to focus on the above points, and the gate locking device is only unlocked once when the gate is lowered and opened, and when the gate is raised and locked after cargo handling is completed, it is automatically locked. To provide a gate locking device that does not require manual locking.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 7, guide rails 3 each having a U-shaped cross section are attached to the pillars 2 erected at the four corners of the loading platform 1 from above to the lower base at a predetermined angle with the lower base tilted outward. The gate 4 has gate hooks 5 on both left and right sides of its upper edge 41.
At the same time, a hinge 6 and a gate lock stopper 7 are fixed and protruded on both left and right sides of the lower end side 42, and the two pillars 2 located on both sides of the longitudinal side of the loading platform 1 are used as a set to lock the gate 4. A gate hook 5 fixedly protruding from the left and right side surfaces of the upper end side 41 is fitted into the inner surface of the guide rail 3 fixed to the pillars 2, 2 so as to be slidable up and down. The tip rotating portion 81 of the lift arm 8 is rotatably connected to the hinges 6, 6 provided on both the left and right sides via a hinge pin (not shown), and the other end fulcrum shaft 82 of the lift arm 8 is connected to a torque tube. 83, and its left and right ends (not shown) are rotatably pivoted to supports (not shown) attached to the lower frame 11 of the loading platform 1. A gate hook 5 provided on the gate 4 slides up and down on the inner surface of the guide rail 3 by the swinging of the lift arm 8, and the gate 4 opens and closes the loading platform 1. Furthermore, there is a gate latch 9 with which the gate hook 5 comes into contact and restricts its upward and downward positions.
1 to the top of the pillar 2, and the gate latch 92 to the top of the pillar 2.
They are fixed at the bottom of each.

The gate hook 5 has a sliding portion 52 at one end of the shaft portion 51.
A flange 53 is formed at the other end, and a fixed part 54 is formed at the tip of the flange through a gate hook engagement groove 55.
A latch assist plate 56 for rotating the gate lock 10 to the locking position when the gate is lowered is fixed to the lower part of the gate 4 with its tip facing downward. The gate lock stopper 7 has a substantially rectangular cross section, and is formed by bending a fixing piece 72 at the upper end of the base 71 and an engaging piece 73 at the lower end at right angles in opposite directions, and engages the engaging piece 73 with the gate lock 10. Attach the fixing piece 72 to the bottom side 4 of the gate 4
It is fixed to the lower surface of both left and right sides of 2.

On the other hand, the gate latch 91 consists of a locking piece 912 bent at right angles to a fixed piece 911.
The downward tip of the gate hook 5 has a hook shape, and the gate hook 5 has a hook shape.
The gate latch 92 is fixed to the upper part of the column 2 with a fixing piece 911 at a position where the engagement groove 55 of the holder comes into contact with it when it is raised, and the gate latch 92 has a substantially L-shaped constricted locking part 9.
21, and consists of a locking stop side 922 with the tip of the L-shaped lower end side bent slightly into an angular shape, and the engaging groove 55 of the gate hook 5 comes into contact with the locking part 921 when lowering. It is fixed to the lower part of the support column 2 in position.

Next, the gate lock 10 is a lock lever 101,
Rotating shaft 201, pin 213, operating handle 30
1. A locking piece of the gate lock stopper 7, which is composed of a support plate 401, a holder 501, a spring hook 601, a spring support seat 701, a spring 801, etc., and is provided on the lower surface of both left and right sides of the lower end side 42 of the gate 4. 73
It is arranged on each support column 2 so that it can be engaged and separated.

The lock lever 101 includes a hook portion 111, an assist plate contact surface 112, a rotation regulating protrusion 113,
is formed into a desired shape, a rotation shaft hole 114 and an operation handle locking hole 115 are bored, one end of the rotation shaft 201 is inserted and fixed into the rotation shaft hole 114, and
Insert the hook portion 311 of the operating handle 301 into the operating handle locking hole 115, and then attach the flange 2 of the support 2.
1 and 21 and the supporting column 2
Holes 411 and 23 passing through the outer surface 22 of the lock lever 101 are respectively provided and are connected by a holder 501, and the rotation shaft 201 is rotatably fitted into the inner surface of the holder 501 to support the lock lever 101. The spring latching tool 601 has a latching piece 612 and a fixing piece 613 extending at right angles in opposite directions at both ends of the wall surface 611.
The latching piece 612 has a spring latching groove 614 and the fixing piece 613 has a hole 615. The wall surface 611 of the spring hook 601 is brought into contact with the tip 211 of the rotation shaft 201, and the rotation shaft 20
A pin 213 is integrally fixed to a hole 212 provided at the other end of the hook 1 and a hole 615 provided to a fixing piece 613 of the hook 601.

On the other hand, the spring bearing seat 701 has a fixed piece 711 and a supporting piece 712 formed in an L-shaped cross section, and the supporting piece 712 is provided with a spring bearing groove 713. The spring bearing seat 701 has its fixed piece 711 attached to the flange 2 of the support column 2.
It is fixed to one side of 1. The spring 801 has hook portions formed at both ends thereof locked at both ends by the spring latching groove 614 of the spring latching tool 601 and the spring bearing groove 713 of the spring bearing seat 701, and the lock lever 10
1 is energized to the locking or unlocking side at the appropriate time. The operating handle 301 is made of a rod or the like, and has a hook portion 311 at one end and a grip portion 312 at the other end.
The hook part 311 is fitted into the operating handle engagement support hole 115 provided on the lock lever 101, and the intermediate part 313 is a guide hole formed in the protector 24 attached to one side of the flange 21 of the support column 2. 25 to guide the pulling operation direction and prevent the operating handle 301 from tilting.

With such a configuration, the gate 4 is normally kept fully closed at the upper side position of the loading platform 1 as described below. That is, the guide rail 3 is fitted onto the inner surface of a guide rail 3 which is fixed to a set of two columns 2 located on both sides of the longitudinal side of the loading platform 1 along the vertical direction with the lower base slightly inclined outward. Engagement groove portion 5 of gate hook 5 protruding from both left and right sides of upper end side 41 of gate 4 to be inserted
5 is in contact with the locking piece 912 of the gate latch 91 provided on the upper part of the support column 2 to restrict the rise of the gate 4, and the gate is attached to the hook portion 111 of the gate lock 10, which is biased with rotational force toward the locking side. The engaging pieces 73 of the gate lock stopper 7 provided on both left and right sides of the lower end side 42 of the gate 4 are engaged to prevent the gate 4 from descending even if a downward load is applied to the gate 4.

Therefore, in order to fully open the gate 4, first move the operating handle 301 in the direction of arrow J.
Hold 2 and pull. Gate lock 10 is holder 5
The hook portion 111 of the gate lock 10 is rotated toward the unlocking side by the hook portion 311 of the operation handle 301 against the biasing force of the spring 801 using the rotation shaft 201 rotatably fitted into the inner surface of the gate lock 10 as a fulcrum. Then, the axis S of the spring 801 passes through the rotation shaft 201 and urges it to the unlocked position, and the rotation regulating protrusion 113 of the gate lock 10 comes into contact with the flange 21 of the column 2, and the lock lever 101 is released to a predetermined position. The gate 4 is maintained in the locked position and separated from the engaging piece 73 of the gate lock stopper 7, so that the gate 4 can be lowered.

Next, as the lower end side 42 of the gate 4 begins to descend, the sliding portion 52 of the gate hook 5 protruding from both left and right sides of the upper end side 41 of the gate 4 slides over the inner surface of the guide rail 3 installed diagonally on the support column 2. The gate 4 slides down while maintaining a substantially vertical state. Furthermore, the gate 4 continues to descend, and the latch assist plate 56 protruding from the lower part of the gate hook 5 comes into contact with the assist plate abutment surface 112 of the gate lock 10, and the gate lock 10 uses the rotation shaft 201 as a fulcrum to release the spring 801. The hook portion 111 of the gate lock 10 rotates toward the locking side against the biasing force, and the axis S of the spring 801 passes through the rotation shaft 201 and biases the locking position to the locked position, and the rotation regulating protrusion 113 of the gate lock 10 rotates. Gate latch 9 provided at the bottom of column 2
The lock lever 101 comes into contact with the second stopper piece 922.
is maintained at a predetermined locked position, and the engagement groove 55 of the gate hook 5 comes into contact with the locking portion 921 of the gate latch 92, completing the lowering, and the gate 4
is fully opened.

In addition, in order to raise the gate 4 from the lower side surface position of the loading platform 1, the sliding portion 52 of the gate hook 5 protruding from both left and right sides of the upper end side 41 of the gate 4 is moved to the support post 2.
The engaging pieces 73 of the gate lock stoppers 7 provided on both left and right sides of the lower edge of the gate 4 come into contact with the hook portion 111 of the gate lock 10, and The hook portion 111 is supported by a spring 801 with the rotation shaft 201 as a fulcrum.
The gate 4 continues to rise while rotating toward the unlocking side within the range in which the biasing force of The biasing force causes the gate to move to the lock side again, and gate lock 1 is activated.
The rotation regulating protrusion 113 of the gate lock 10 comes into contact with the stopper piece 922 of the gate latch 92, and the gate lock 10 is automatically maintained in its original locked position.
The engagement groove 55 of the locking piece 91 of the gate latch 91
2, the gate 4 is stopped from rising and is held fully closed on the upper side of the loading platform 1.

According to the present invention as explained above, when opening and closing the gate, it is only necessary to pull the operating handle once and set the locking device to the unlocked side, unlike the conventional method that required operating the handle even when locking the gate. Compared to the conventional method, the number of operations is halved, and the workability is far better, which has the practical effect of simplifying cargo handling work.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of the loading platform gate, Fig. 2 is an enlarged plan view of section C in Fig. 1, Fig. 3 is an enlarged plan view of section D in Fig. 1, and Fig. 4 is an enlarged plan view of section E in Fig. 2. FIG. 5 is a front view of the gate hook attachment portion at the upper end of the F-view cargo platform gate in FIG. 2, and FIG. 6 is a side view of the gate lock attachment portion at the lower end of the G-view cargo platform gate in FIG. 3. , Fig. 7 is a front view of the gate lock attachment part at the lower end of the H cargo platform gate in Fig. 3, and Figs. 8 and 9 show the state in which the gate is lowered and fully opened in Figs. 6 and 7, respectively, and the gate lock is returned to its original locked position. FIG. 4 is a bent side view and a front view. 1... Loading platform, 2... Support, 3... Guide rail, 4... Gate, 5... Gate hook, 6...
Hinge, 7... Gate lock stopper, 8... Lift arm, 10... Gate lock, 41... Top edge of gate, 42... Bottom edge of gate, 56...
...Latch assist plate, 91, 92...Gate latch, 301...Operation handle, 801...
Spring.

Claims (1)

[Scope of utility model registration request] In a locking device for a loading platform gate that can be opened and closed by sliding up and down, a latch assist plate is provided protruding from the lower part of the gate hooks provided on both left and right sides of the upper end of the gate, and gate lock stoppers are provided at both left and right ends of the lower end of the gate. The gate hook is slidably inserted in the vertical direction into the inner surface of a guide rail that is fixed to the four corners of the pillar with the lower part inclined slightly outward along the vertical direction, and the gate latch is attached to the upper and lower parts of the pillar. In addition, an operation handle for releasing the restraint of the gate is connected to a gate lock provided with a spring that applies rotational force on both sides of locking or unlocking, and the gate lock can be engaged and detached from the gate lock stopper. When the gate is raised, the gate lock and the gate lock stopper engage to lock the gate, and when the operation handle is used to unlock the lock and lower the gate, the latch assist plate contacts the gate lock. A locking device for a vertically sliding gate that is configured so that the gate lock is located on the locking side.