JPH07112890A - Presser plate guide device for hanging nad carrying device - Google Patents

Abstract

PURPOSE:To provide a presser plate guide device for smoothly guiding ascending and lowering of a load carrying platform without generating a trouble such as a catch in a guiding mechanism even in the case where the quantity of elevating stroke of the load carrying platform is large at the time of pinching a material to be carried, which is placed on the load carrying platform of a hanging and carrying device, for fixation with a pressure plate of a travelling truck. CONSTITUTION:A pressure plate 15 is hoisted just under a travelling truck A freely to be elevated, and a material to be carried is pinched for carrying between this presser plate 15 and a load carrying platform B. Plural hanging cylinders 12a are hung from the travelling truck A, and a loose insertion hole 12f, in which a hoisting shaft 16 for hoisting the presser plate 15 freely to be elevated is loosely inserted, is drilled in a bottom plate 12e, and the presser plate 15 is energized downward by a compression spring 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding plate guide device for securely and safely sandwiching an object to be conveyed between a traveling carriage and a load carrier in a suspension conveying device.

[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, downward U-shaped suspension supports are fixed to the four corners of the upper surface of the presser plate, and the upper pieces thereof are loosely fitted from below to the suspension supports vertically provided on the lower surface of the traveling carriage. There is a device that is suspended by a locking pin, and the pressing plate is biased downward by a compression spring wound around the suspension rod.

[0004]

According to this device, in order to increase the lifting stroke of the presser plate, the height of the downward U-shaped suspension support is increased and the suspension bar is suspended. It is necessary to lengthen the loose fitting part of the brace. If the height of the suspension support is increased, the suspension support may be deformed or buckled due to external force, and the holding plate may not move up and down in parallel with the traveling carriage, or it may stop halfway and deform or damage the transported object. There is a risk. Further, since the upper piece of the suspension support is a plate, if the lifting stroke of the holding plate is large, the suspension support may be caught in the free-fitting part of the suspension support in the middle, often causing a problem.

An object of the present invention is to provide a guide mechanism for ascending / descending of the loading platform when the transported object placed on the loading platform of the suspending / transporting device is clamped and fixed by the holding plate of the traveling carriage even if the lifting stroke of the loading platform is large. An object of the present invention is to provide a presser plate guide device that smoothly guides without trouble such as being caught in.

[0006]

In order to achieve the above object, the present invention provides a traveling carriage that travels along a rail erected on a ceiling or the like, suspends and supports a loading platform that is moved up and down by a motor, and A holding plate that is vertically movable so that it can be moved up and down, and an object to be transported is placed on a loading platform and lifted, so that the object to be transported is sandwiched between the loading platform and the pressing plate to be transported. In a holding plate guide device used for a carrying device, a plurality of suspension support cylinders are vertically provided on the traveling carriage, and a loose insertion hole for loosely inserting a suspension support shaft for suspending and lifting the holding plate is drilled in a bottom plate thereof. At the same time, the pressing plate is biased downward by an elastic body.

On the bottom plate of the suspension support cylinder, a bearing tool for slidably guiding the suspension support shaft is mounted so as to be laterally movable, and means for preventing the bearing tool from moving upward is provided. Good.

Further, the bearing device is a linear motion bearing, and a linear motion bearing support fitting for loosely inserting the linear motion bearing from above is fixed to a suspension support cylinder to prevent the linear motion bearing from moving upward. Is good.

Furthermore, it is preferable that a clearance be provided between the top of the linear motion bearing and the upper and lower surfaces of the linear motion bearing support fitting.

[0010]

According to the present invention, when an object to be transported is placed on a vertically movable loading platform and the loading platform rises to bring the transported object into contact with the holding plate and the loading platform still rises, it is fixed to the upper surface of the holding plate. The lifting support shaft that lifts and lowers the presser plate ascends while sliding in the linear motion bearing, and the transported object is unevenly contacting the presser plate and the presser plate tilts and rises as it is. However, since the linear motion bearing is loosely fitted in the linear motion bearing support bracket so as to be laterally movable and tiltable, the linear motion bearing is lifted while correcting the uneven rising state. The same applies to the case of the descent. Further, even if there is an installation error of the suspension support shaft fixed to the upper surface of the pressing plate or the suspension support cylinder vertically provided on the traveling carriage, the error can be absorbed in the same manner as described above.

[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 central portion of the board (1) in the left-right direction to move up and down. The drive gear (11) of the motor, that is, the two-axis motor (10) meshes with each other, and the loading platform (B) is
Keeps horizontal and moves up and down.

A holding plate guide device (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 supporting plates (3).

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

The holding 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 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 transporting 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.

Both the front and rear rotary plates (26) are linked by a link (33) which is a linking means, and the both 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.

Next, 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 rollers (29) and is guided by the guide fence.
Guided by (24), it is transferred to the belt conveyor (22).

When both 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, when raising the holding 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 suspension shaft that is fixed to the top surface of the holding plate and that supports the holding plate so that it can be raised and lowered, and a linear motion bearing support bracket that slidably inserts the linear motion bearing that slidably inserts the hanging shaft. The linear motion bearing support metal fitting is fixed to a suspension support cylinder which is vertically installed 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, the mounting error of the suspension support cylinder vertically laid on the traveling carriage, and the like. 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 place 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 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.

[0034]

According to the present invention, the following effects can be obtained. (a) A suspension shaft that is fixed to the upper surface of the presser plate and that suspends the presser plate so that it can move up and down is loosely inserted into the loose insertion holes formed in the bottom plates of the plurality of suspension support tubes that are vertically installed on the traveling carriage. At the same time, since the pressing plate is biased downward by the elastic body, the transported object comes into uneven contact with the pressing plate and the pressing plate tilts. It is possible to raise while correcting such a rising state, and it is possible to reliably sandwich and fix the transported object between the holding plate of the traveling carriage and the loading platform.

(B) Similarly, the linear motion bearing on which the suspension support shaft slides has a margin at the peripheral side portion and the upper end portion with respect to the linear motion bearing support fitting, that is, rattling is allowed.
Since it is housed, there is no possibility that the above-mentioned upward movement is caught when the pressing plate is tilted, and there is no possibility that the conveyed object is deformed or damaged due to an excessive force, and can be raised.

(C) Further, since the above-mentioned allowance is provided, the dimensional error is absorbed even if the suspension barrel and the suspension shaft are not attached with high precision, and therefore the manufacturing is facilitated.

[Brief description of drawings]

FIG. 1 is a front view of a suspending and conveying device provided with a holding plate guide 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 (4)

[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, and a holding plate is vertically movably suspended directly below the traveling carriage to support the loading platform. A holding plate guide device for use in a hanging and conveying device in which a conveyed object is carried by sandwiching the conveyed object by placing the conveyed object and lifting it up. Of the suspension support cylinder, and a bottom plate thereof is provided with a free insertion hole for loosely inserting a suspension support shaft for suspending and lifting the presser plate, and the presser plate is biased downward by an elastic body. A presser plate guide device characterized in that 2. A bearing member for slidably guiding the suspension support shaft is mounted on the bottom plate of the suspension support cylinder so as to be movable laterally, and means for preventing the bearing device from moving upward is provided. The presser plate guide device according to claim 1, wherein: 3. A linear motion bearing is used as the bearing tool, and a linear motion bearing support fitting for loosely inserting the linear motion bearing from above is fixed to a suspension support cylinder to prevent upward movement of the linear motion bearing. The pressing plate guide device according to claim 2. 4. The pressing plate guide device according to claim 3, wherein a margin is provided between the top of the linear motion bearing and the upper and lower surfaces of the linear motion bearing support fitting.