JPH07112889A - Hanging and carrying device - Google Patents

Abstract

PURPOSE:To prevent the generation of damage and breakage of a material to be carried without generating lowering of the working efficiency at the time of pinching a material to be carried, which is placed on a load carrying platform of a hanging and carrying device, for fixation with a presser plate of a travelling truck by appropriately controlling the ascending speed of the load carrying platform at two stages of deceleration and stop. CONSTITUTION:A first sensor 13a for decelerating the rotation of an elevating motor 10 of a load carrying platform B with ascending of a presser plate 15 by the load carrying platform B and a material to be carried, and a second sensor 13b for stopping the rotation of the elevating motor 10 of the load carrying platform B are arranged on a travelling truck A with a space in the vertical direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspending and conveying apparatus provided with a device for securely and safely sandwiching an object to be conveyed between a traveling carriage and a cargo bed.

[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.

As a device for sandwiching an object to be conveyed between a traveling carriage and a luggage carrier in this kind of conveying device, Japanese Patent Application No. 5-143357 previously filed by the applicant can be cited. In this prior application device, the object to be transported placed on the load platform that can be raised and lowered contacts the holding plate of the traveling carriage as the load platform rises,
A sensor that detects that the holding plate has risen by a predetermined amount stops the motor for raising and lowering the loading platform, and the transported object is fixed by sandwiching it between the loading platform and the holding plate of the traveling carriage, and the transportation is performed in this state. I am trying.

[0004]

In this prior art example, the loading platform continues to rise at a constant speed until the sensor detects that the holding plate has risen by a predetermined amount, and the sensor raises the holding plate by a predetermined amount. When it is detected, it suddenly stops, so that the transported object may be deformed or damaged. In addition, the belt that suspends the cargo bed stretches and the balance of the cargo bed is lost. As a countermeasure, there is a device that detects the amount of lift of the loading platform by the number of rotations of the loading platform winding drum and changes the lifting speed when the loading platform is raised to a certain position. If the height is higher than the set value, there is no problem if it is constant, but if the height of the bed is changed, the object to be conveyed hits the holding plate and the object to be conveyed is deformed. Further, when the height of the transported object is lower than the set value, there is a disadvantage that the period from the position where the rising speed of the loading platform is changed until the transported object hits the holding plate becomes longer than necessary and the efficiency is lowered. For this reason, there is a drawback that the set value of the number of rotations of the loading platform winding drum for detecting the lift amount of the loading platform must be changed every time the transported object is changed.

According to the present invention, when an object to be conveyed placed on a loading platform of a suspending and conveying apparatus is clamped and fixed by a holding plate of a traveling carriage,
An object of the present invention is to effectively prevent the deformation and damage of the transported object without deteriorating the work efficiency by controlling the ascending speed of the loading platform in two stages such as decelerating and stopping in a timely manner.

[0006]

In order to achieve the above object, the suspending and conveying apparatus of the present invention suspends a loading platform that is moved up and down by a motor on a traveling vehicle that travels along a rail installed on a ceiling or the like. In a suspending / conveying device for placing and transporting an object to be conveyed on this carrier, a plurality of pressing plate guide devices are provided directly below the traveling carriage to suspend the pressing plate so that the pressing plate and the carrier can be moved. A first sensor that allows the object to be conveyed by sandwiching the object between the object and the object and that decelerates the rotation of the lifting motor of the platform as the pressing plate is raised by the platform and the object to be transported. Then, a second sensor for stopping the rotation of the lifting motor of the loading platform is arranged in the traveling cart at a vertical interval.

[0007] It is preferable that the pressing plate suspended vertically by a plurality of pressing plate guide devices just below the traveling carriage is urged downward by an elastic body.

The first sensor and the second sensor are preferably suspended from the lower surface of the traveling carriage.

[0009]

According to the present invention, when the object to be transported is placed on the vertically movable loading platform and the loading platform rises, the transported object comes into contact with the holding plate, and the loading platform further rises, the first sensor operates first. The rotation speed of the loading platform lifting motor is decelerated, and when the loading platform is further raised, the second sensor is activated to stop the loading platform lifting motor. As a result, the transported object is securely and securely fixed without being deformed or damaged.

[0010]

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 vertically arranged side by side at the front and rear of the horizontal board (2) of the traveling carriage (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) having the base end fixed 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 holding plate guide device (12) and a proximity sensor (13) are vertically provided on both outer sides of the winding drums (4) at the lower ends of the pair of supporting plates (3).

The holding plate guide device (12) is a cylindrical suspension rod fixed to the lower surface of the support plate (3), that is, a suspension pipe (12a), and is loosely fitted in the suspension pipe (12a). Lower plate that extends downward
The main members are the suspension support shaft (16c) attached to (15) and the compression spring (17) that acts in a direction to extend the suspension support cylinder (12a) and the suspension support shaft (16c). is there.

The pressing plate guide device will be described in more detail with reference to FIGS. 6 and 7. As well shown in FIG. 6, the suspension support tube (12a) having the top end fixed to the lower surface of the support plate (3) has a bottom plate (12e) at the lower end thereof. A suspension shaft (16c) is inserted into a loose insertion hole (12f) that is a round hole formed in this bottom plate (12e), and a linear bearing (12c) also called a linear ball bearing is attached to its upper end. A bearing tool is fitted, a linear motion bearing support fitting (12b) is fitted from above, and this is fixed to the suspension support tube (12a) with a set screw (12d). The suspension support shaft (16c) has a locking metal fitting (16d) attached to the upper end thereof using a flat head machine screw (16e). This locking bracket (16
d) limits the lowering of the suspension support shaft (16c) by hitting the linear motion bearing support fitting (12b). What should be noted here is that the suspension support shaft (16c) is loosely fitted in the loose insertion hole (12f) at the lower end of the suspension support cylinder (12a) with a margin, and the outer diameter of the linear motion bearing (12c). 6 and 7 between the inner diameter of the linear motion bearing support bracket (12c) and
As shown in Fig. 4, a certain degree of clearance is formed, and furthermore, the top surface of the linear motion bearing (12c) and the linear motion bearing support bracket
There is also some clearance left between the inner ceiling of (12b). The lower end of the suspension support shaft (16c) is attached to the holding plate base (15a) via the suspension support (16b), and
The metal fitting (16b) is provided here. This metal fitting (16b) and hanging support tube
A compression spring (1a) is provided between the mounting part (12a) and the support plate (3).
7) is wrapped. Therefore, the holding plate (15) is
It is biased downward by (17).

The proximity sensor (13) comprises a lower first sensor (13a) and an upper second sensor (13b) attached to a hanging support member (13c) hanging from the lower surface of the support plate (3). ) And. The lower first sensor (13a) is a sensor that operates to decelerate the rotation of the lifting motor, that is, the dual-axis motor (10), and the upper second sensor (13b) stops the rotation of the dual-axis motor. It is a sensor that operates in a squeaky manner.
On the side surface of each holding plate guide device (12), when the holding plate (15) rises against the compression spring (17), it approaches the proximity sensor (13) and decelerates the biaxial motor (10), 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 provided.

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.
With (27) facing upward, move both guide fences (24) outward, and lower the loading platform (B) rising near the traveling vehicle (A) 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 fence (24) is connected 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 fence.
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).

The loading platform (B) rises to near the upper limit and the container
When the (30) contacts the high friction material (15b) of the holding plate (15) and pushes up the holding plate (15) against the compression spring (17), the sensing piece (18) that rises together first The two-axis motor (10) decelerates the rotation in proximity to the first sensor (13a) by the signal.
From this time, the lifting speed of the loading platform slows down, and then the sensing piece (1
When 8) approaches the second sensor (13b), the signal causes the biaxial motor (10) to stop and the platform (B) to stop rising.

Now, in raising the presser plate (15),
The presser plate guide device (12) guides the presser plate (15) with room in front, rear, left and right. That is, the pressing plate guide device (12)
Is a linear motion bearing support metal fitting that is fixed to the upper surface of the pressing plate and that suspends the pressing plate so that it can move up and down, and a linear motion bearing that slidably inserts the hanging motion shaft with loose play. And the linear motion bearing support metal fitting is fixed to a suspension support cylinder that is vertically provided on the traveling carriage. According to this device, it is possible to absorb the mounting error of the suspension support shaft fixed to the upper surface of the pressing plate and the mounting error of the suspension support cylinder vertically laid on the traveling carriage. Easy to make. Also, when the holding plate is moved up and down, the suspension shaft slides smoothly in the linear motion bearing, and the linear motion bearing can move within the linear motion bearing support bracket. Even if the pressing plate tilts due to contact and rises as it is, the pressing plate can be raised while correcting the uneven rising state, and the pressing plate can be smoothly moved up and down.

After the lifting of the loading platform is stopped, the traveling vehicle is in this state.
When (A) is run, the container (30) is pressed against the loading platform (B) by the pressing plate (15) that is downwardly urged by the compression spring (17), so that vibration or shock during transportation causes There is no lateral displacement, and the upper surface is not contaminated by dust or the like during that time.

The apparatus which has reached above the target location is operated in the opposite manner to the above, whereby the transported container (30) is transferred.
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 embodiment, the object to be conveyed is the container (30), but a corrugated cardboard box, a wooden box, a basket, etc. can be similarly conveyed, and a roller conveyor is used instead of the belt conveyor. You can also do it.

[0033]

According to the present invention, the following effects can be obtained. (a) Since the presser plate decelerates the rotation of the lifting / lowering motor of the loading platform due to the lifting of the loading platform and the sensor that stops the rotation of the lifting / lowering motor of the loading platform are sequentially operated, a sudden lifting of the loading platform can be prevented. It is possible to prevent the deformation or damage of the transported object on the loading platform due to the stoppage, and it is possible to securely and securely clamp the transported object.

(B) The lifting speed of the platform is slow,
Since the belt that suspends the loading platform does not suddenly stretch, the length of the belt does not become out of balance even if the belt is used for a long period of time. Therefore, adjustment, maintenance, and inspection of the transport vehicle are easy and inexpensive.

(C) A sensor for decelerating the rotation of the lifting / lowering motor of the loading platform and the rotation of the lifting / lowering motor of the loading platform are caused by the object to be transported on the loading platform being brought into contact with a holding plate suspended just below the traveling carriage to be lifted. Since the lifting of the loading platform is controlled by the sensor that stops the lifting of the loading platform, the lifting of the loading platform can always be controlled in an optimal state regardless of the height of the transported object, and the operating efficiency of the transport vehicle can be improved. .

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a suspension conveyance device of the present invention.

FIG. 2 is a bottom view showing the traveling carriage of the suspension conveyance device shown in FIG. 1 with a holding plate removed.

FIG. 3 is a partially longitudinal side view showing a situation when the loading platform of the suspension transport apparatus shown in FIG. 1 is connected to a roller conveyor.

FIG. 4 is a partially longitudinal side view showing a state where the loading platform of the suspension transport apparatus shown in FIG. 1 is mounting a container and is rising.

FIG. 5 is a partially longitudinal side view showing a situation when the loading platform loaded with the container of the suspension transport apparatus shown in FIG. 1 is lifted to the upper limit.

FIG. 6 is an enlarged vertical cross-sectional view of a holding plate guide device of the suspension conveyance device shown in FIG.

FIG. 7 is an enlarged vertical cross-sectional view of a holding plate guide device similar to that of FIG. 6, but showing a state in which the bed is lifted and the compression spring is fully compressed.

[Explanation of symbols]

 (A) Traveling vehicle (B) Loading platform (1) Rail (2) Substrate (3) Support plate (4) Take-up 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) Holding plate guide device (12a) Suspension tube (12b) Linear motion bearing support bracket (12c) Linear motion bearing (12d) Set screw (12e) Bottom plate (12f) Free insertion hole (13) Proximity sensor (13a) First sensor (13b) Second sensor (13c) Hanging support member (15) Holding plate (15a) Holding plate base (15b) ) High friction material (16a) Suspension support (16b) Bracket (16c) Suspension support shaft (16d) Locking bracket (16e) Flat head screw (17) Compression spring (18) Sensing piece (19) Pulley (20) Endless Belt (21) Motor (22) Belt conveyor (23) Mounting plate (23a) Horizontal part (23b) Vertical part (24) Guide fence (25) Photoelectric sensor (26) Rotating plate (27) Engagement plate (27a) Base Piece (27b) Hook piece (28) Engagement groove (29) Crossover roller (30) Container (31) Roller conveyor (32) Engagement protrusion (32a) Annular groove (33) Link

Claims (3)

[Claims] 1. A loading platform that is lifted and lowered by a motor is suspended from a traveling carriage that travels along rails installed on a ceiling or the like,
In a suspending and conveying device for placing and transporting an object to be conveyed on this platform, a plurality of retaining plate guide devices are provided just below the traveling carriage to suspend the retaining plate so that it can be raised and lowered, and the retaining plate and the platform. And a first sensor for decelerating the rotation of the lifting motor of the loading platform as the pressing plate is lifted by the loading platform and the transported object while allowing the transported object to be transported by sandwiching it. Then, a suspending and conveying apparatus, characterized in that a second sensor for stopping the rotation of the lifting motor of the loading platform is arranged on the traveling vehicle at a vertical interval. 2. The suspension according to claim 1, wherein the presser plate suspended vertically by a plurality of presser plate guide devices just below the traveling carriage is urged downward by an elastic body. Transport device. 3. A first sensor and the second sensor,
The suspension conveyance device according to claim 1 or 2, wherein the suspension conveyance device is suspended from the lower surface of the traveling carriage.