JPS6228520Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for preventing unloading of transferred articles, and more specifically, the present invention relates to a device for preventing unloading of transferred articles. The present invention relates to a device for preventing unloading of transferred articles at the one end of the storage table.

Conventionally, this type of device for preventing unloading of transferred articles has been used, for example, in a transport truck for an automobile engine, and is operated by a manual operation lever to move the storage platform to a retracted position below the loading surface and to the loading surface. 2 at the operating position that protrudes further upward to prevent the items on the storage table from being unloaded.
It consists of a stopper located in either position. This stopper functions completely as a means for preventing unloading when it is in the working position, but after the stopper is in the retracted position and the article has been placed on the storage platform, the operator can release the stopper again. If the user forgets to return the load to the operating position, the stopper cannot function as a means for preventing unloading, and as a result, unloading occurs.

In view of the above-mentioned shortcomings of the conventional device, the present invention has been developed to provide a device for preventing unloading of transferred articles, in which the stopper is always located at the operating position after the article is transferred to the storage table, and the stopper does not forget to be engaged. The purpose is to provide the following.

The present invention provides an apparatus for preventing the unloading of articles carried into and stored in a storage platform from which articles are carried in and out from one end of the storage platform. A first stopper and a second stopper are pivotally attached to one end of the table at a position below the mounting surface of the storage table, and each of the first and second stoppers is provided with a claw portion. The claw portions of the first and second stoppers are normally positioned in a biased state at an operating position protruding from the placement surface, and the first stopper is configured such that the claw portions of the first and second stoppers are biased when the article is moved in the carrying direction. When the object is moving, it comes into contact with the claw in the operating position and swings to allow the object to pass, but it is not possible to swing in the opposite direction. , when the article moves in the unloading direction, the second stopper swings when the moving article comes into contact with the claw portion thereof in the operating position, allowing the article to pass. , so that it cannot swing in the opposite direction, and the first
and a second stopper between the first and second stoppers.
This device is characterized by being provided with an operating lever that swings one of the stoppers and lowers its pawl below the mounting surface.

That is, the device for preventing unloading of transferred articles of the present invention is provided with a one-way first stopper that only allows loading of articles at the article entrance/exit portion of the storage table, and also prevents loading by releasing the first stopper. A one-way second stopper is provided to prevent forgetting to engage the stopper, which is positioned at a blocking position.
This prevents items from being loaded while the first stopper is released, and ensures that the first stopper is always in the operating position when loading items. This structure eliminates the need to forget to engage the stopper and prevents unloading. Note that when the first stopper is in the active position protruding from the placement surface, it is swingable in the direction of carrying in the article as described above, so carrying in the article is not hindered.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A device for preventing unloading of transferred articles according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic front view of a device for preventing unloading of transferred articles according to an embodiment of the present invention.

In FIG. 1, reference numeral C denotes a storage stand for articles G, and this storage stand C is constructed of, for example, a chain conveyor-like structure in which a large number of chains are arranged in parallel. A device 1 for preventing unloading of articles G is provided at the entrance/exit end of this storage table C. This unloading prevention device 1 is pivotably mounted by pivot pins 2 and 3 at a position below the loading surface C ₁ of the storage table C so as to be swingable in the loading and unloading directions of articles as shown by arrows A and B. The first stopper 4 and the second stopper 5 are provided. The first stopper 4 acts as a stopper for preventing unloading of transferred articles, and the second stopper 5 acts as a stopper for preventing the unloading preventive stopper from being forgotten.

The first stopper 4 includes a claw portion 4a and a lever portion 4b extending in a direction substantially opposite to the claw portion 4a with respect to the pivot pin 2. A heavy flange portion 4c extending in the direction of arrow B at right angles to the lever portion 4b is formed at the lower part of the lever portion 4b.
Therefore, the first stopper 4 is given a clockwise rotational habit in FIG. On the other hand, arrow A on pivot pin 2
A stop member 6 is disposed obliquely downward in the direction, and the weight part 4
When the first stopper 4, which is biased clockwise by C, is in a state where the claw portion 4a protrudes from the mounting surface _C1 of the storage base C, as shown in FIG. Stop rotation to prevent clockwise rotation. The first stopper 4 is restrained by the stop member 6 from swinging clockwise, that is, in the direction of arrow B of the claw portion 4a, but is allowed to swing counterclockwise, that is, in the direction of arrow A of the claw portion 4a. It's getting old. Therefore, even when the first stopper 4 is in the operating position as shown in FIG. 1, it is possible to carry the article G into the storage table C. In order to facilitate the loading of the article G into the storage platform C when the stopper 4 is in the operating position, the surface 4d on the entrance/exit side of the storage platform C at the position 4a is an inclined surface as shown in the figure. There is.

The second stopper 5 also includes a claw portion 5a and a lever portion 5b extending in a direction substantially opposite to the claw portion 5a with respect to the pivot pin 3. The lower portion 5c of the lever portion 5b serves as a weight for biasing the lever 5b in a direction opposite to the biasing direction of the first stopper 4, that is, in a counterclockwise direction. A stop member 7 is provided below the pivot pin 2 in the direction of arrow A.
This stopper member 7 is configured to push the second stopper 5, which is biased counterclockwise by the lower part 5c acting as the weight, into the claw portion 5a as shown in FIG.
The rotation is stopped so that it does not rotate any further in the counterclockwise direction when it is in the state in which it protrudes from the mounting surface _C1 , that is, in its working position. The second stopper 5 is moved counterclockwise by this stopper member 7, that is, the claw portion 5
Although the swinging of a in the direction of the arrow A is restricted, the swinging of the claw portion 5a in the clockwise direction, that is, in the direction of the arrow B, is allowed. Therefore, even when the second stopper 5 is in the operating position as shown in FIG. 2, it is possible to carry out the article G from the storage stand C. When the second stopper 5 is in the operating position, in order to facilitate the carrying out of the article G from the storage table C, the surface 5d of the claw portion 5a opposite to the entrance/exit side of the storage table C has a shape as shown in the figure. It is a sloped surface.

An operating device 8 is provided below the first and second stoppers 4 and 5 for positioning either one of the first and second stoppers 4, 5 to the retracted position. This operating device 8 includes an operating lever 9 whose upper end 9a is located between the first and second stoppers 4 and 5. This operating lever 9 has a lower end pivotally attached to a pivot shaft 9b and a first
It is designed to be able to swing between the first position shown in the figure and the second position shown in FIG. 2, and an operation bar ( (not shown) is fixed. This operating bar operates the second stopper 5 when the operating lever 9 is located in the first position shown in FIG. 1, and the first stopper 4 when the operating lever 9 is located in the second position shown in FIG.
are placed in their respective retracted positions.

The operating lever 9 is connected to an operating handle 11 via a link mechanism 10, and one end of the operating handle 11 is pivotally attached to a pivot shaft 12, and the other end is a grip portion 11a. . A third
As shown in the figure, a bracket 11b is attached, and a lever 11c is pivotally attached to the bracket 11b at its intermediate portion.
A long hole 11d is formed approximately in the center of the handle 11, and one end of the lever 11c extends to the long hole 11d. Lever 11c
A pin 11e extending through the elongated hole 11d is fixed to one end of the saw. The other end of the lever 11c extends to the other end of the handle 11, and a spring 11f is disposed between the other end of the lever 11c and the other end of the handle 11. This spring 11f serves to bias the other end of the lever 11c toward the handle 11.
On the opposite side of the lever 11c to the handle 11,
A positioning plate 13 is arranged. This positioning plate 13 has first and second positioning holes 13 in two places.
a, 13b are formed, and by fitting the pin 11e of the lever 11c into either of these positioning holes 13a, 13b, the angular position of the handle 11 around the pivot shaft 12 is determined, and thereby the operating lever 9 is set in the position shown in FIG. 1 or 2.

The link mechanism 10 transmits the movement of the handle 11 to the operating lever 9, and includes a bar 10a having one end pivoted between the pivot 12 of the handle 11 and the elongated hole 11d and extending upward therefrom; The bar 10a is pivotally connected to the upper end of the bar 10a, the other end is pivotally connected to the pivot shaft 9b, and the horizontal link 10b is fixed to the lower end of the operating lever 9. A flange 10c is formed in the middle of the bar 10a, and a bracket 15 fixed to the machine frame 14 extends below the flange 10c. This bracket 15
Although shown in the figure, a long groove or an opening is formed, and the bar 10a is formed in this long groove or opening.
is passing through.

A spring 16 is provided between the flange 10c and the bracket 15, and this spring 16 urges the bar 10a upward and, in turn, urges the operating lever 9 to the position shown in FIG. A bracket 15 is placed above the flange 10c.
A stopper 17 having the same shape as shown in FIG.

Next, the operation of the unloading prevention device 1 having the structure explained above will be explained.

First, it is assumed that the article G is placed on the storage table C and the unloading prevention device 1 is in the state shown in FIG. In this state, the operating handle 11 is
The pin 11e of the lever 11c is arranged in a position where it fits into the first positioning hole 13a of the positioning plate 13, and therefore the second stopper 5 is positioned at the retracted position by the action of the operating lever 9, while the first stopper 4 is located at the operating position due to the urging force of the weight 4c. Therefore, the article G placed on the storage table C is prevented from being unloaded by the action of the first stopper 4.

Next, to explain the case of unloading, as described above, when the first stopper 4 is in the operating position, the claw portion 4a cannot swing in the direction of movement in the direction of arrow B, and therefore unloading is performed. I can't. Therefore, by grasping the grip portion 11a of the operation handle 11 together with the lever 11c, the lever 11c is rotated clockwise in FIG. 3, the pin 11e is removed from the first positioning hole 13a, and the handle 11 is to be able to rotate around the In this state, the handle 11 is rotated downward about the pivot 12 to a position where the pin 11e faces the second positioning hole 13b of the positioning plate 13, and then the lever 11c is released. Then, the lever 11c rotates counterclockwise in FIG. 3 due to the action of the spring 11f, and the lever 11c rotates counterclockwise in FIG.
1e into the second positioning hole 13b to keep the handle 11 in a downwardly rotated state.
With the downward rotation of the handle 11, the lever 9 also swings clockwise about the pivot 9b, and by the action of the operating bar provided at the upper end 9a of the lever 9, the first stopper is moved. 4 to the retracted position shown in FIG. On the other hand, the lever 9 is
Since it no longer acts on the second stopper 5, the second stopper 5 becomes free and is rotated counterclockwise about the pivot shaft 3 until it hits the stop member 7 by the action of the lower part 5c acting as a weight. At this time, the claw portion 5a of the second stopper 5 is positioned at the active position protruding from the mounting surface _C1 of the storage table C instead of the claw portion 4a of the first stopper 4, as shown in FIG. It will be done.

Even when the second stopper 5 is in this operating position, it can rotate clockwise about the pivot 3, and therefore it is possible to move the article G in the direction of arrow B and unload it. It is. however,
After this unloading is completed, even if an attempt is made to load a new article G, the second stopper 5 in the operating position cannot swing counterclockwise, making it impossible to load the article G onto the storage platform C. . Therefore, contrary to the above, the handle 11 is rotated upward to position the second stopper 5 at the retracted position and the first stopper 4 at the operating position. The first stopper 4 can rotate counterclockwise about the pivot shaft 2 even when the claw portion 4a is in the operating position protruding from the mounting surface _C1 . Therefore, when the article G carried in from the output port end to the storage platform C comes into contact with the slope 4d of the stopper 4 when moving in the direction of the arrow A, the stopper 4 is swung counterclockwise and its claw It passes through the stopper while pushing the portion 4a under the mounting surface _C1 of the storage table C, and is stored in the storage table C. After the article G has passed, the stopper 4 automatically returns to the operating position shown in FIG. 1 by the action of the weight portion 4c. Therefore, according to the present invention, there is no possibility of forgetting to engage the stopper for preventing unloading, so it is possible to completely prevent unloading due to forgetting to engage the stopper.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of the unloading prevention device according to an embodiment of the present invention, with the first stopper placed in the operating position, and FIG. 2 is the unloading prevention device shown in FIG. 1. FIG. 3 is a front view of the handle of the unloading prevention device shown in FIG. 1. FIG. C...Accommodating table, _C1 ...Placement surface, G...Article,
1... Unloading prevention device, 4... First stopper, 5...
...Second stopper, 4a, 5a...Claw portion, 8...Operation device.

Claims (1)

[Scope of utility model registration request] In a device for preventing unloading of transferred articles, which prevents unloading of articles carried and stored in a storage table from which articles are carried in and out from one end, at the one end of the storage table, the one end of the storage table is prevented from unloading. A first stopper and a second stopper are pivotally attached at a position below the mounting surface of the storage table, and each of the first and second stoppers is provided with a claw portion. The claw portions of the first and second stoppers are normally positioned in a biased state at an operating position protruding from the placement surface, and when the article moves in the carrying direction, the first stopper is positioned in a biased state. When the moving article comes into contact with the claw portion in the operating position, the article is swung and allowed to pass, but cannot be swung in the opposite direction. When the article moves in the unloading direction, the stopper swings when the moving article comes into contact with the claw portion at the operating position, allowing the article to pass, but when the article is moved in the opposite direction. is configured such that it cannot swing, and an operating lever is provided between the first and second stoppers for swinging one of the first and second stoppers and lowering the claw portion thereof from the mounting surface. A device for preventing unloading of transferred articles, characterized by being provided.