JPH0825638B2 - Unloading device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unloading device for unloading articles such as corrugated cardboard boxes stacked in a plurality of stages in units of stages, and particularly to prevent a load collapse occurring during transportation. , When the bottom surface of the stacked articles and the top surface of the articles stacked below it are glued,
The present invention relates to an unloading device capable of unloading while removing glue.

[0002]

2. Description of the Related Art As a conventional technique relating to an unloading device, one disclosed in Japanese Patent Publication No. 2-62449 is known.

The conventional technique described in the above publication will be described in Japanese Patent Publication No. 2-62449.
A corner clamp plate having an L-shaped cross section, which is provided with contact plate portions that straddle the vertical corners of the package at the four corners of a rectangular parallelepiped-shaped package having a step or a plurality of steps and contact both side surfaces thereof, and these corner clamps A clamping device for a package is described, which comprises a fluid pressure cylinder that presses each plate in a diagonal direction of the package.

[0004]

However, the above-mentioned prior art has the following problems.

That is, the clamp device for a package described in Japanese Patent Publication No. 2-62449 discloses a case where the bottom surface of the stacked articles and the top surface of the articles stacked in the lower stage are glued. Since the glue cannot be peeled off, it is not possible to unload in steps.

Therefore, the object of the present invention is to enable unloading step by step even when the bottom surface of the stacked articles and the top surface of the articles stacked in the lower step are glued. To provide an unloading device.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to an unloading device for unloading articles stacked in a plurality of stages in units of stages, and a pair of pressing tools facing each other and the pressing tools facing each other in the same direction. A pair of lower-stage pressing tools, an elevating device for elevating the lower-stage pressing tools, and an article elevating device for elevating the stacked articles are attached, and the elevating device is attached so as to be horizontally moved together with the pressing tools. The above-mentioned pressing tool is the most
Pressing and gripping the upper article, the lower pushing tool is two steps from the top
When the eye article is pressed and held, the elevating device and the article elevating device are lowered substantially at the same time to unload the uppermost article, thereby providing the unloading device as described above. Has achieved the purpose of.

It is preferable that the lifting device has a two-stage stroke cylinder.

[0009]

The unloading device of the present invention can unload the articles in steps even when the bottom surface of the articles stacked and the top surface of the articles stacked in the lower step are glued. .

[0010]

EXAMPLES Examples of the unloading device of the present invention will be described below.

FIG. 1 is a plan view showing an embodiment of the unloading device of the present invention, FIG. 2 is a side view of the unloading device shown in FIG. 1, and FIG.
2 is an enlarged view of a main part of the unloading device shown in FIG. 2, and FIG. 4 is a left side view of the main part of FIG. Note that, in FIG. 2, the lower pressing member on the left side, the lifting device, etc. are omitted.

In these drawings, (1) is a main frame composed of a rectangular parallelepiped frame, (2) and (3) are stacked.
An article lifting device ( table lifter ) fixedly mounted on the main frame (1) for lifting and lowering the loaded articles , (4) two traveling rails attached to the upper part of the main frame (1),
(5) is a traveling carriage that travels on the traveling rail (4), and the traveling carriage (5) is equipped with a gripping mechanism (6). Thus, the gripping mechanism (6) has a pair of pressing tools (32) and (33) facing each other, and a pair of lower pressing tools (44) facing the pressing tools (32) and (33) in the same direction. (45)
And elevating devices (46) and (46) for elevating and lowering the lower pressing tools (44) and (45), respectively.
6) is equipped with a two-stage stroke cylinder (47), linear guides (48), (48), etc.
6) and (46) are attached so as to move in the horizontal direction together with the pressing tools (32) and (33).

Explaining each part in the above-mentioned embodiment, the gripping mechanism (6) includes a guide pipe (2) for the left-right direction which is horizontally arranged in a cross shape by a cross connecting part (7).
0), (21) and the guide tubes (22), (2) for the front-back direction.
3), guide tubes (20), (21), (22), (23)
A slide boss (24) slidably attached to the
(25), (26), (27), slide boss (2
4), (25), (26), and (27) are connected with the ends of the telescopic rods and the base ends of the cross connecting portions (7).
Slide boss moving cylinder (28) attached to
(29), (30), (31), slide boss (2
4), the left and right pressing plates (32), (33) and the slide boss (26) as pressing members of the present invention, which are attached to the lower part of the (25) and extend in the front-back direction and have a constant height. ), (27) attached to the lower part and extending in the left-right direction consisting of plate-shaped bodies of a certain height for the front-back direction, pressing plates (34), (35), slide bosses (24), (25)
Double-acting two-stage stroke cylinders (47), (47), pressing plates (32), (3
3) A pair of linear guides (48), (48), (48), (48) mounted on the outer surface of the two-stage stroke cylinders (47), lower pushes attached to the end of the telescopic rod of (47) The pressing plates (32), (33), (34), (3) are composed of tools (44), (45), etc.
Both end parts of 5) have adjacent pressing plates (32), (33),
As shown in FIG. 5, it has an irregular (lattice) shape so that it can smoothly cross both ends of (34) and (35).
The lower pressing members (44) and (45) are lower pressing body moving cylinders (49a) and (49a), a pair of guide shafts (49b), (49b), (49b) and (49), respectively.
b), the lower-stage pressing bodies (49c), (49c) and the like, which are rod-shaped bodies extending in the front-rear direction. Also,
(36) and (37) are left and right pressing plates (32),
A rack for synchronizing the movement of (33), a pinion (38) for the same purpose, and movements of the pressing plates (34), (35) for the front-rear direction are also synchronized by a similar mechanism. It has been done. Also, (42) is a photo switch,
(43) is a limit switch.

Further, as shown in FIG. 6, ball seats (101) are fixed to the four corners of the traveling carriage (5), and the ball seats (101) are partially projected from the upper surface. A rotating sphere (102) is stored. On the other hand, ball seat (101)
The lower surface of the gripping mechanism (6) facing the
There is a flat receiving surface (103) which contacts the 2). As a result, the gripping mechanism (6) causes the pressing plate (32),
When (33), (34) and (35) grip the uppermost article, they freely move on the rotating sphere (102) and are aligned with the center position of the uppermost article.

Further, gripping mechanism main body pressing devices (104), (105), (106) and (107) are provided on each of four sides of the traveling carriage (5) surrounding the gripping mechanism (6). There is. Gripping mechanism main body pressing device (104), (1
05), (106) and (107) are as shown in FIG.
Pressing cylinder (108), pressing arm (109) actuated by pressing cylinder (108), spindle (110)
And so on. Thereby, the gripping mechanism main body pressing device (104), (105), (106), (107)
Has the gripping mechanism (6) centered on the center position of the uppermost article and centered on the traveling carriage (5).

Next, regarding the unloading operation by the above-mentioned unloading device, articles such as cardboard boxes stacked in a plurality of tiers on the pallet (51) are palletized (50) in different tiers.
An example of the case of transshipping above will be described. In addition, pallet (5
1) Since the articles stacked on the top are glued to the bottom surface of the stacked articles and the top surface of the articles stacked below in order to prevent a load collapse that occurs during transportation, It is designed to be unloading while peeling off the glue.

First, an empty pallet (50) is placed on the table lifter (2), and a pallet (51) loaded with articles is placed on the table lifter (3). After the traveling carriage (5) moves from the position shown in FIG. 2 to a position directly above the table lifter (3), the table lifter (3) is raised and the photo switch (42) causes the top of the article on the table lifter (3). Is detected and rises until a certain period of time elapses. This fixed time is the time required to rise by the height of approximately one step of the stacked articles, and is controlled by the control device for each type of article, so that the entire side surface of the uppermost article is At the position where it can be pressed and held, that is, the uppermost article is the pressing plates (32), (33), (34), (3
Stop raising the table lifter (3) at a position surrounded by 5). At this time, the center position of the uppermost article and the center position of the gripping mechanism (6) do not match.

When the table lifter (3) is raised to a predetermined position, the slide boss moving cylinders (28), (2
9), (30) and (31) are actuated to press the pressing plates (32), (33), (34) and () through the slide bosses (24), (25), (26) and (27). 35) presses and grips the entire side surface of the uppermost article, and the two-stage stroke cylinders (47) and (47) are slide bosses (24),
It is moved horizontally along with the pressing plates (32) and (33) via (25). Also, a two-stage stroke cylinder (4
The cylinders on the slide bosses (24) and (25) of 7) and (47) are actuated to operate the lower pressing bodies (49c) and (49).
c) descends from the top to a position where the side surface of the second stage article can be pressed and grasped. The pressing plates (32), (3
When 3), (34) and (35) press and grip the uppermost article, the gripping mechanism (6) freely moves on the rotating sphere (102) to align the center position of the uppermost article. To be done.

Pressing plates (32), (33), (34),
When (35) press-holds the uppermost article, the lower-stage pressing body moving cylinders (49a) and (49a) are actuated, and the lower-stage pressing bodies (49c) and (49c) move to the second-stage article from the top. Grip the sides.

When the lower pressing bodies (49c) and (49c) press and grasp the side surface of the second-stage article from the top, the table lifter (3) descends and the two-stage stroke cylinders (47) and (47) move. The cylinder on the end side of the telescopic rod was actuated, and the lower pressing bodies (49c) and (49c) descended while pressing and gripping the side surface of the article in the second step from the top, and were stacked on the pallet (51). The uppermost article is separated from the second and subsequent articles from the top in steps while peeling the glue that adheres the bottom surface of the uppermost article and the top surface of the second article from the top.

When the article on the uppermost stage is separated from the articles on the second and lower stages from the top in units of stages, the lower pressing body moving cylinder (4
9a), (49a) and 2-stage stroke cylinder (4
7) and (47) are returned to the origin position.

A lower stage pressing body moving cylinder (49a),
(49a) and two-stage stroke cylinders (47), (4
7) and 7) are returned to the origin position, the gripping mechanism (6) centered on the center position of the uppermost article moves the gripping mechanism main body pressing devices (104), (105), (106), (10).
By 7), the center position of the traveling carriage (5) is aligned.
After that, the traveling vehicle (5) moves from directly above the table lifter (3) to directly above the table lifter (2). still,
Gripping mechanism main body pressing device (104), (105), (10
6) and (107) may be operated while the traveling carriage (5) is moving.

Before the traveling carriage (5) equipped with the gripping mechanism (6) for pressing and gripping an article moves to directly above the table lifter (2), an empty pallet () placed on the table lifter (2) 50) is located slightly lower than the bottom level of the article whose upper surface is pressed and gripped by the gripping mechanism (6). When the traveling carriage (5) is moved right above the table lifter (2), the table lifter (2) is slightly raised and the upper surface of the pallet (50) is pressed and gripped by the gripping mechanism (6). The bottom surface of the gripping mechanism (6) is lifted, the limit switch (43) is activated and stopped.

When the lifting of the table lifter (2) is stopped, the slide boss moving cylinders (28), (29),
The slide boss (2
The pressing plates (32), (33), (34) and (35) release the pressing and holding of the article via 4), (25), (26) and (27).

When the pressing and holding of the articles are released, the table lifter (2) starts to descend, and the table lifter (2) descends by the height of the articles stacked on the pallet (50) and stops, whereby the pallet ( 51) The articles stacked on the pallet (50) are stacked on the pallet (50).

When the pallet (51) placed on the table lifter (3) is replaced with a pallet (51) on which articles of different types are loaded and the above unloading operation is repeated, the table It is possible to stack articles of different types one by one on the pallet (50) placed on the lifter (2).

The embodiments of the unloading apparatus of the present invention have been described above, but the present invention is not limited to these. For example, the uppermost article may be pressed and held only by the pair of pressing plates (32) and (33) without providing the pressing plates (34) and (35).

Further, a pair of lower pressing members facing the pressing plates (34) and (35) in the same direction may be provided.

[0029]

INDUSTRIAL APPLICABILITY As described above, the unloading apparatus of the present invention can remove the adhesive that adheres the bottom surface of the stacked articles and the top surface of the articles stacked below it. By doing so, even when the bottom surface of the stacked articles and the top surface of the articles stacked below it are glued, it is possible to unload in steps.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an unloading device of the present invention.

FIG. 2 is a side view of the unloading device shown in FIG. 1, in which a lower pressing tool on the left side, an elevating device, etc. are omitted.

FIG. 3 is an enlarged view of a main part of the unloading device shown in FIG.

FIG. 4 is a left side view of a main part of FIG.

5 is an explanatory view of a crossing state of the end portions of the pressing plate of the unloading device shown in FIG.

FIG. 6 is an enlarged view of a main part of the unloading device shown in FIG.

[Explanation of symbols]

 32, 33 pressing tool (pressing plate) 44, 45 lower pressing tool 46 lifting device 47 two-step stroke cylinder

Claims (2)

[Claims] 1. An unloading device for unloading articles stacked in a plurality of stages in units of stages, a pair of pressing members facing each other, a pair of lower pressing members facing in the same direction as the pressing members, An elevating device for elevating the lower pressing tool, and an article elevating device for elevating the stacked articles are provided, and the elevating device is attached so as to be moved in the horizontal direction together with the pressing tool. Gripping the top item
Then, the lower pressing tool presses and holds the article in the second step from the top.
Then, the lifting device and the article lifting device descend at substantially the same time to unload the uppermost article. 2. The unloading device according to claim 1, wherein the lifting device includes a two-stage stroke cylinder.