JPH0225781Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cargo loading/unloading device capable of loading and unloading a plurality of cargoes into a container at once.

(Prior Art) The applicant of the present invention has previously developed a device of this type in which a plurality of roller conveyors for receiving legs at the bottom of cargo are arranged side by side on the left and right. A transfer unit that is positioned in the gap between the conveyors and extends forward is connected, and the transfer unit is provided with a support arm that can freely move circularly on a vertical plane using a crank mechanism to receive the bottom surface of the cargo between the legs. The proposed system transfers the cargo between the conveyor table and the container floor by moving the cargo up and down by circular motion of the arm and feeding the cargo forward and backward in increments.

(Problem to be solved by the invention) When unloading a container using the previously proposed device, the transfer unit is placed in the space between the legs at the bottom of the cargo placed on the container floor. After inserting the container from the rear, the support arm moves in a circular motion to feed the cargo backwards, and the leg pieces are placed on the roller conveyor. However, if the cargo inside the container shifts sideways There is a problem in that the leg pieces come off the roller conveyor, making it impossible to smoothly transfer cargo to the conveyor table.

An object of the present invention is to provide an improved device of the above-mentioned proposal that solves these problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a front end of a conveyor stand that can move forward and backward into a container in which a plurality of roller conveyors are arranged side by side on the left and right to receive the legs at the bottom of the baggage. A transfer unit that extends forward is connected to the arrangement gap between these roller conveyors, and a support arm that receives the bottom surface between the legs of the cargo is attached to the transfer unit so that it can freely move circularly on a vertical plane using a crank mechanism. A side of the roller conveyor is provided in which the load is transferred between the conveyor table and the container floor by moving the load up and down and feeding it in increments in the front and back direction by the circular motion of the support arm. The present invention is characterized in that a diagonal guide portion extends from the front end of the guide plate and extends outwardly toward the front and the top.

(Function) Even if the legs of the cargo placed on the container floor are deviated laterally with respect to the roller conveyor on the conveyor table, the inclination of the legs will be reduced when the cargo is fed backward in increments by the circular movement of the support arm. By contacting the guide portion, the lateral deviation of the leg is corrected, the leg is reliably placed on the roller conveyor, and the load can be smoothly transferred to the conveyor table.

If the guide section simply expands forward, the support arm will slide against the cargo due to the resistance force when the leg comes into contact with the guide section, causing the cargo to move further backwards. However, in the present invention, the guide section is slanted so as to expand upward, so that the load is not easily transported as the support arm moves downward from the top dead center position to the bottom dead center position. When descending, the leg pieces are guided by the vertical slope of the guide section and moved inward, and when the load is lifted and sent rearward by the upward movement of the support arm from the bottom dead center position, the leg pieces There is no contact with the guide section, and the guide section does not restrict the delivery of the luggage to the rear.

(Example) Referring to Figures 1 and 2, 1 is a container;
2 indicates a platform of a cargo handling area installed at the same level as the floor of the container 1, and a conveyor table 4 moved by a tractor 3 is installed on the platform 2.
A plurality of packages W can be placed on the conveyor table 4 in alignment in the front and back direction, and the conveyor table 4 is connected to the container 1.
Loading and unloading of cargo W was carried out by moving the vehicle forward and backward.

As shown in FIGS. 3 and 4, the conveyor table 4 is equipped with five left and right roller conveyors 5 that receive leg pieces Wa protruding from the bottom surface Wb of the cargo W.
Four chains 6 on the left and right are stretched between the drive sprocket 6a at the rear end and the driven sprocket 6b at the front end in the gaps between these roller conveyors 5.
and each chain 6 is equipped with a cargo W as shown in the fifth figure.
A hydraulic motor 6d connected to the drive sprocket 6a rotates the chain 6 forward and backward to reciprocate the hook 6c in the front-rear direction. The cargo W on the conveyor table 4 is pushed forward by the motion.

Here, narrow loads W can be placed on the conveyor table 4 in two rows on the left and right as shown in FIG.
A baggage W that is twice as wide as that is 1 as shown in Figure 4b.
In this case, the width of the left and right outer roller conveyors 5 is t ₀ , the width of the inner roller conveyor 5 is t ₁ , and the width of the center roller conveyor 5 is
As t ₂ , t ₁ was set to approximately 2t ₀ and t ₂ was set to approximately 3t ₀ so as to be able to cope with the change in position of each leg piece Wa between two rows of mounting and one row of mounting.

Furthermore, four transfer units 7 extending forward are connected to the front end of the conveyor table 4, and are positioned in the gaps between the roller conveyors 5 and extend forward. A pair of left and right support arms 8, 8, which receive the bottom surface Wb of the
It is assumed that the cargo W is transferred between the conveyor table 4 and the floor of the container 1 by moving the cargo W up and down and feeding it in increments in the front-back direction by a circular motion. In the illustrated example, each support arm 8 provided in each transfer unit 7 is provided with a horizontal first arm portion 8a, as shown clearly in FIGS. 6 and 7.
and a rear second arm portion 8b whose upper edge is inclined rearward upward, and each arm portion 8a, 8b is configured separately.
are pivotally connected at their front and rear ends to crank pins 9b, 9b of a pair of front and rear crankshafts 9a, 9a constituting the crank mechanism 9, and these crankshafts 9a are connected to a gear train 9d by a common hydraulic motor 9c.
It is possible to freely rotate forward and reverse through the .

Here, when loading cargo into the container 1, the conveyor stand 4 is advanced into the container 1, and the chain 6 is
By this, the cargo W is sequentially pushed out to the transfer unit 7 starting from the front end, and the crankshaft 9a is rotated counterclockwise in FIG. Each time the load W moves from the top dead center position to the front dead center position, the load W is lifted and sent forward, and the load W is placed on the floor of the container 1 in close contact with the previous load W. .

When unloading the container 1, the transfer unit 7 is inserted from the rear into the gap between the legs Wa at the bottom of the cargo W placed on the floor, and the crankshaft 9a is
is rotated clockwise in FIG. 7. According to this, each time the arm parts 8a and 8b move from the front dead center position, through the top dead center position, and to the rear dead center position, the load W is lifted and moved backward. The second arm portion 8b lifts the cargo W toward the rear, and the leg piece Wa
is placed on the roller conveyor 5.

In this case, if the leg piece Wa is deviated laterally with respect to the roller conveyor 5, it will not be possible to feed the leg piece Wa into the roller conveyor 5 smoothly. As clearly shown in FIG. 9 and FIG. 9, the oblique guide portion 5b is inclined so as to expand outwardly toward the front and upwards.
It was decided that this would be extended.

The guide portions 5b are formed to extend from the side guide plates 5a on the inner side of the roller conveyor 5 on both the left and right sides, and on the side guide plates 5a, 5a on both sides of the roller conveyor 5 on the inner side and the center.

Here, if the luggage W is laterally shifted to the left as shown in FIG. One side Wa is the oblique guide portion 5b of the left side guide plate 5a of the roller conveyor 5 in the center.
Then, the right leg piece Wa of the right-hand baggage W comes into contact with the diagonal guide portion 5b of the left side guide plate 5a of the rightmost roller conveyor 5, and the lateral shift of each baggage W is corrected. In the case of one-row storage, the leg piece Wa on the right side and the inner side of the baggage W comes into contact with the left diagonal guide portion 5b of the roller conveyor 5 on the right side and the inside side, and the lateral shift of the baggage W is corrected. , Also, when the cargo W is shifted laterally to the right as shown in Fig. 9b,
Each leg piece Wa comes into contact with each guide portion 5b in a bilaterally symmetrical positional relationship to the above, and the lateral shift is corrected.

At this time, as each leg piece Wa comes into contact with each guide portion 5b, the resistance force against the rearward sending of the load W increases, and the support arm 8 slides against the load W, causing the load W to move backward. However, when the load W moves downward from the top dead center position of the support arm 8, the leg piece Wa moves along the vertical slope of the guide portion 5b. The lateral shift is corrected by falling diagonally downward from the position indicated by A in Fig. 8 to the position B, and when the support arm 8 moves upward from the front dead center position to the top dead center position, the leg piece Wa shifts to the position B. The load W is lifted from position C to position C, and is sent rearward without being stopped by the guide portion 5b, and the leg piece Wa
is smoothly fed to the roller conveyor 5.

In the drawing, 10 is a connecting piece to the tractor 3 at the rear end of the conveyor table 4, 11 is a hydraulic pipe connecting the hydraulic motors 6d and 9c to a hydraulic power source mounted on the tractor 3,
Reference numeral 12 indicates casters attached to the lower surfaces of the conveyor table 4 and the transfer unit 7.

(Effects of the invention) As described above, according to the invention, when unloading a container, etc., the cargo placed on the floor can be smoothly transferred to the conveyor table by correcting the lateral deviation of the leg pieces relative to the roller conveyor. Moreover, the configuration is such that it is sufficient to extend the oblique guide portion to the front end of the side guide plate of the roller conveyor, and the structure is simple and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a side view of an example of the proposed device in use;
Figure 2 is its plan view, Figure 3 is its enlarged plan view,
Figure 4 ab is 2 cut along the - line in Figure 3, respectively.
A cutaway rear view of the conveyor table when loaded in rows and when loaded in one row, FIG. 5 is an enlarged cutaway side view taken along the line - in FIG. 4,
Fig. 6 is an enlarged plan view of the transfer unit, Fig. 7 is a side view thereof, Fig. 8 is an enlarged cutaway front view of the diagonal guide section taken along the - line in Fig. 3, and Fig. 9 a and b are the respective loads. FIG. W...Luggage, Wa...Leg piece, 1...Container,
4...Conveyor stand, 5...Roller conveyor, 5a
...Side guide plate, 5b...Diagonal guide portion, 7...
...Transfer unit, 8...Support arm, 9...Crank mechanism.

Claims (1)

[Scope of utility model registration request] A transfer unit that extends forward is connected to the front end of a conveyor table that can move forward and backward into a container in which multiple roller conveyors for receiving legs at the bottom of cargo are arranged side by side on the left and right. The transfer unit is provided with a support arm that receives the bottom surface between the legs of the load so as to be able to move freely in a circular motion on a vertical plane using a crank mechanism, and the circular movement of the support arm moves the load up and down and feeds the load in increments in the front and back direction. hand,
In a device for transferring cargo between the conveyor table and the container floor, a slope is provided at the front end of the side guide plate of the roller conveyor so as to expand outwardly toward the front and upwards. A cargo loading/unloading device characterized by an extended shaped guide section.