JPH072351A - Cargo drop preventing device for liftable load carrying platform - Google Patents

Abstract

PURPOSE:To prevent the dropping of a cargo loaded on a load carrying platform and prevent the rocking of the load carrying platform when the cargo is delivered. CONSTITUTION:When a load carrying platform B is loaded with a cargo 30 and lifted or lowered, coupling plates 27 are set to the erect positions, and the coupling plates 27 serve as fences to prevent the dropping of the cargo 30. When the cargo 30 is delivered, the coupling plates 27 are set to the prostrated position, and the coupling plates 27 do not hinder the delivery of the cargo 30. Hook pieces 27b are provided on the coupling plates 27 so that the hook pieces 27b are coupled with coupling lugs 32 provided on a station 31 when the coupling plates 27 are set to the prostrated position, then the rocking of the load carrying platform B itself is prevented, and the cargo 30 can be safely and surely delivered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing a load from falling on a loading platform which can be moved up and down with respect to a station for delivering the load, and a device for preventing the loading platform itself from swinging during delivery. Regarding

[0002]

2. Description of the Related Art In a factory or the like, an object to be conveyed, which is conveyed by a conveyor, for example, a container containing a large number of members is supplied to a processing step, stored in a warehouse, or transferred to another conveyor. In doing so, a suspending and conveying device is often used, and various such devices are already provided.

[0003] In this type of transfer device, since a loading platform is usually suspended and supported by a traveling carriage, for example, a container may drop from the loading platform during traveling, or a container transported by a roller conveyor may be transported by a roller conveyor. When transferring from the end station to the loading platform, there is a problem that the loading platform swings due to impact or the like and the container cannot be loaded safely and reliably. This also applies when transferring the container on the loading platform to another conveyor. Therefore, each transport device is provided with various means for dealing with the above problems.

[0004]

However, in the conventional loading / unloading device, the shape, size, weight, material and strength of the container are restricted, the structure is complicated and expensive, and the effect is uncertain. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device capable of preventing a load such as a container placed on a loading platform from falling and transferring the load from the station to the loading platform or vice versa reliably and safely. I am trying.

[0006]

In order to achieve the above object, a load drop preventing device for an elevating and lowering platform according to the present invention is arranged so that it can be moved up and down with respect to a station for delivering and receiving a load, at least on a delivery side. An engaging plate is provided at the end portion of the movable body so as to be movable between an upright position that prevents lateral movement of the load placed on the bed and a fall position that does not hinder the delivery of the load.

It is preferable that the engaging plate is provided with a hook piece that engages with an engaging protrusion provided on the station to prevent lateral movement of the loading platform when the engaging plate is moved to the fall position.

Further, a transfer roller is pivotally provided inside the engagement plate and at a position which is flush with the load transfer surface of the station at the time of fall, and the engagement plates are movably provided on both sides of the loading platform. By means of the linking means, they are linked so as to vertically move up and down in synchronization with each other, a conveyor is provided on the upper surface of the loading platform that can transport loads in the loading and unloading direction, or the loading platform is moved up and down to a traveling carriage that travels along a rail. It is good to hang it freely.

[0009]

When the load is placed on the platform and moved up and down, if the engaging plate is set to the upright position, the engaging plate serves as a fence to prevent the load from falling, and when delivering the load, the engaging plate is set to the lying position. Then, the engagement plate does not hinder the delivery of the load.

If a hook piece is provided on the engagement plate so that the hook piece engages with an engagement protrusion provided at the station when the load is delivered, the hook piece engages with the engagement protrusion provided at the fall position. The movement is blocked, and the load can be delivered safely and securely.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of the present invention.
(1) is a rail erected on the ceiling, (A) is a trolley that travels along the rail (1), and (B) is a loading platform that is lifted and supported by a traveling trolley (A).

A pair of support plates (3) facing in the left-right direction are arranged vertically in front and rear of the horizontal board (2) of the traveling vehicle (A) to form a pair. A pair of left and right take-up drums (4) are pivotally installed at the center of both support plates (3),
Similarly, on both ends, a roller with flange (5),
A pressing roller (6) arranged in parallel with and close to it is pivotally installed.

The free end of the suspension belt (7) fixed at the base end to each winding drum (4) passes between the flanged roller (5) and the pressing roller (6), and the lower bed ( B) underframe (8) 4
It is fastened to the corner.

The drum shaft (4) of the pair of winding drums (4)
Gears (9) having the same number of teeth are fitted and meshed with each other at the inner end of (a), and one gear (9) is provided in the center of the substrate (1) in the left-right direction. The drive gear (11) of the shaft motor (10) meshes with each other, and the loading platform (B) moves up and down while being kept horizontal by the shaft motor (10).

A suspension rod (12) and a proximity sensor (13) are vertically provided on both outer sides of both winding drums (4) at the lower ends of the pair of support plates (3), and the suspension rod (12) is provided. At the lower end of 12), lock pin (1
4) is installed horizontally.

A substrate that is horizontal below the substrate (2)
A downward U-shaped hanging fixture (16) is fixed to the four corners of the upper surface of the holding plate (15) which is slightly smaller than (2), and the upper piece thereof is the hanging support rod (12).
It is loosely fitted in the lower part and is suspended by the locking pin (14), and the pressing plate (15) is urged downward by the compression spring (17) wound around the suspension rod (12). ing.

When the holding plate (15) rises against the compression spring (17) on the side surface of each suspension support (16), it comes close to the proximity sensor (13) and the double shaft motor (10) is installed. A sensing piece (18) for stopping is attached.

A pair of left and right endless belts (20) wound around pulleys (19) are made to rotate in the same direction by a motor (21) on the underframe (8) of the loading platform (B). Belt conveyor (2
2) is located.

A belt conveyor (2
Guide rails (24) that are approximately equal in length and parallel to the belt conveyor (22) are provided on the horizontal portions (23a) of both mounting plates (23) that are laid on both outer sides of 2) and that are bent in a lateral L shape. , And a pair of left and right photoelectric sensors (25) for detecting an object to be conveyed are provided at both ends thereof so as to be adjustable in lateral position.

At the front and rear ends of the vertical portions (23b) of both mounting plates (23), the bases of a pair of left and right rotating plates (26) are pivotally supported to allow the free movement of both rotating plates (26). Ends are angled engagement plates (27)
Near both ends of the hook piece (27b), which is connected by the base piece (27a) of the above and normally faces outward, engaging grooves (28) are cut from the edge, and the free ends of both rotating plates (26) are A crossover roller (29) is pivotally provided between the parts along with the engagement plate (27).

As shown in FIGS. 3 and 4, a roller conveyor (31) for conveying a container (load) (30) containing a large number of members.
The engaging projection (32) is provided at a location corresponding to the engaging groove (28) of the engaging plate (27) on the end surface of the station for carrying the load, and the engaging projection (32) has An annular groove (32a) is formed by which the engaging groove (28) can be engaged from above.

The front and rear rotating plates (26) are linked by a link (33) which is a linking means, and the engaging plates (27) and the crossing rollers (29) are in the standing position shown in FIG. And rotates in the opposite direction in synchronization with the lying position shown in FIG.

The above-mentioned device, as shown in FIG.
(27) is directed upward, both guide rods (24) are moved outward, and the loading platform (B) rising near the traveling vehicle (A) is lowered by the double shaft motor (10). As shown in FIG. 3, the height is the same as that of the roller conveyor (31).

When the engaging plate (27) is rotated outward, the engaging groove (28) engages with the annular groove (32a) of the engaging protrusion (32) of the roller conveyor (31). Accordingly, lateral swing of the loading platform (B) is prevented, and at the same time, the crossover rollers (29) rotate upward and outward, and the belt conveyor (22) and the roller conveyor (3) of the loading platform (B) are rotated.
In the middle of 1), the height becomes equal to that of both and the space is divided and becomes narrower.

At the same time, the guide rod (24) is attached to the roller conveyor (31).
Corresponding to the width of the upper container (30), move it inward and fix it.

Then, when the roller conveyor (31) and the belt conveyor (22) of the loading platform (B) are operated, the container (30) containing a large number of members passes through the transition roller (29) and the guide rod.
Guided by (24), it is transferred to the belt conveyor (22).

When the photoelectric sensors (25) detect that the container (30) is completely transferred to the loading platform (B), the belt conveyor (22) is stopped by the signal, so that the rotating plate (26) is rotated. By moving the engaging plate (27) to an upright position facing upward and the crossover roller (29) facing inward and upward so that the biaxial motor (10)
To raise the platform (B).

When the loading platform (B) rises to near the upper limit and the container (30) pushes up the holding plate (15) against the compression spring (17), the sensing piece (18) that rises together causes the proximity sensor. In proximity to (13), the biaxial motor (10) stops rotating and the platform (B) stops rising due to the signal.

If the traveling carriage (A) is caused to travel in this state,
The container (30) is clamped downward by the compression spring (17) (1
Since it is pressed against the loading platform (B) by 5), it does not laterally shift due to vibration or shock during transportation, and the upper surface is not soiled by dust or the like during that time.

The apparatus which has reached above the target point is operated in the opposite manner to the above, whereby the transported container (30)
Can be carried out, and since the container (30) does not laterally shift during transportation, it can be carried out correctly to a predetermined place in a predetermined posture.

In the above-mentioned embodiment, the object to be conveyed is the container (30), but a corrugated cardboard box, a wooden box, a basket or the like can be similarly conveyed, and a roller conveyor is used instead of the belt conveyor. You can also do it.

[0032]

According to the present invention, the following effects can be obtained. (a) By placing the engaging plate in the upright position when the load is placed on the loading platform and moved up and down, the engaging plate serves as a fence to prevent the load from falling. When is the fall position, the engagement plate does not hinder the delivery of the load (the invention according to claim 1).

(B) If a hook piece is provided on the engaging plate so that the hook piece engages with the engaging protrusion provided on the station when the engaging plate is in the fall position when the load is delivered, The swinging of itself is prevented, and the load can be delivered safely and reliably (the invention according to claim 2).

(C) According to the third aspect of the invention, the rollers are positioned in the gap between the station and the bed, so that the load can be delivered and received more smoothly.

(D) According to the invention described in claims 4, 5 and 6, the load can be more reliably prevented from falling, the load can be delivered more smoothly, and the load can be transported to a distant place. It will be possible.

[Brief description of drawings]

FIG. 1 is a front view of an article conveying device to which the present invention has been applied.

FIG. 2 is likewise a bottom view of the traveling carriage with the pressing plate removed.

FIG. 3 is a partially longitudinal side view showing a situation when the loading platform is connected to the roller conveyor.

FIG. 4 is a partial vertical cross-sectional side view showing a state in which the loading platform on which the tray is placed is also rising.

FIG. 5 is a partial vertical cross-sectional side view showing a situation when the loading platform on which the tray is placed is lifted to the upper limit.

[Explanation of symbols]

(A) Traveling vehicle (B) Loading platform (1) Rail (2) Substrate (3) Support plate (4) Winding drum (4a) Drum shaft (5) Flanged roller (6) Press roller (7) Suspended belt (8) Underframe (9) Gear (10) Double-axis motor (11) Drive gear (12) Suspension rod (13) Proximity sensor (14) Locking pin (15) Holding plate (16) Suspension support (17) ) Compression spring (18) Sensing piece (19) Endless belt (20) Motor (21) Belt conveyor (22) Photoelectric sensor (23) Mounting plate (23a) Horizontal part (23b) Vertical part (24) Guide fence (25) Photoelectric sensor (26) Rotating plate (27) Engaging plate (27a) Base piece (27b) Hook piece (28) Engaging groove (29) Crossing roller (30) Container (load) (31) Roller conveyor (station) ( 32) Engaging protrusion (32a) Annular groove (33) Link (coupling means)

Claims (6)

[Claims] 1. An erection plate for preventing lateral movement of a load placed on the bed, at least at an end portion on the load delivery side of a bed that can be moved up and down with respect to a station for delivering the load. A load drop prevention device for a lift platform, which is provided so as to be movable between a position and a fall position that does not hinder the delivery of loads. 2. The engagement plate is provided with a hook piece that engages with an engagement protrusion provided on the station to prevent lateral movement of the loading platform when the engagement plate is moved to the fall position. A device for preventing the load from falling on the lifting platform described above. 3. The load drop prevention device for a lifting platform according to claim 1, wherein a transfer roller is pivotally provided inside the engagement plate and at a position which is flush with the load transfer surface of the station when it is folded down. 4. The lifting and lowering platform according to claim 1, wherein engagement plates are provided on both sides of the platform so as to be vertically movable, and are linked so as to be vertically synchronized with each other by a linkage means. Load drop prevention device. 5. A conveyor capable of transporting a load in a load delivery direction is provided on an upper surface of the loading platform.
The fall prevention device for a load on a lifting platform according to any one of 1. 6. The load drop prevention device for an elevating and lowering platform according to claim 1, wherein the platform is suspended and supported by a traveling carriage that travels along a rail so as to be vertically movable.