JPH089411B2 - Wiring structure of mobile shelf with safety bar - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable rack on which a load is placed and movable in a factory warehouse, a distribution warehouse, a library, etc., and more particularly to a wiring structure of a safety device for the movable shelf.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional example of a moving rack having a safety bar on the front side. FIG. 10 is a schematic plan view of the moving unit shelf 01. A pair of front and rear wheels 03 is provided on the underframe 02 by about three pairs, and the rear three wheels 03 are rotated by one rotating shaft 04. The rotating shaft 04 is driven by the motor 05 and the rail
It is possible to move in the front and back and the depth direction on 06.

Four safety bars 07 projecting forward are arranged in a line on one front surface of the rectangular underframe 02 of the moving unit shelf 01. Each safety bar 07 is supported via an elastic member, is displaced to the underframe 02 side by the collision of a foreign object, operates a limit switch provided on the underframe 02 side, and drives the moving unit shelf 01. Stop the drive of 05 and stop the mobile unit shelf 01 to prevent an accident.

The limit switch is a b-contact switch, which normally opens a contact when it is short-circuited and operates. Each limit switch is connected in series, and the electric wire 09 avoids the wheel 03 inside and stands on the base. The control board 010 is wired in the frame 02 and arranged on one side plate.

[0005]

[Problems to be solved] The cable 011 for driving the motor 05 is also laid inside the underframe 02, and in practice, the electric wires of the motor cable and the limit switch are both fixed to the vertical frame / horizontal frame using a binding band. And is laying.

Therefore, the wiring inside the underframe 02 becomes complicated,
Therefore, work to attach the safety bar to the underframe 02 at the site
The wiring interferes with the installation and the assembly is extremely poor. Also
On the contrary, when removing the safety bar, take out the load of the underframe and attach the shelf board.
It requires work such as removal, and maintenance is not easy.

The present invention has been made in view of the above points, and an object of the present invention is to provide a moving shelf wiring structure that simplifies wiring on the unit shelf main body side and facilitates mounting work of a safety device. There is a point to offer.

[0008]

In order to achieve the above object, the present invention is directed to a group of unit shelves arranged such that adjacent frontages abut each other at the time of focusing and are movable in the depth direction. Among the movable shelves configured to form a space corresponding to a passage between any adjacent unit shelves, a safety bar that operates by collision of an object is provided at the front of each of the unit shelves.
An emergency switch that has and is activated by the operation of the safety bar
Is installed in the same safety bar and extends from the emergency switch.
A connector is provided at the end of the electric wire, and the safety bar is
The emergency switch and the electric wire extending from the emergency switch
With the connector provided at the end of the electric wire,
It is knitted, and the connector is on the main unit side of the unit shelf.
Connect to the electric wire or the electric wire on the safety bar side that is arranged side by side.
It has a wiring structure of a mobile shelf with a safety bar that can be detachably connected .

[0009] The safety bar along with the emergency switch
Since the safety bar is unitized with a nectar,
The safety bar is easy to handle and the unit shelf book of the safety bar
Easy to attach to the body and connect the wire to the connector
More safety bars per unit shelf or wires on the side of the unit shelf
If arranged in a row, the safety bars will be arranged next to each other.
It can be connected to other electric wires and has excellent assemblability. On the contrary of the safety bar
Easy to remove, take out the load of the underframe as before.
There is no need to remove the shelf plate and maintenance is easy.
Also, the electric wire of the emergency switch is on the safety bar side, and the unit shelf side
The wiring can be simplified. The safety bar is at the top
Is pivoted and swings by the collision of an object
By using a movable shelf wiring structure with a working safety bar,
With a simple structure, the safety bar operates smoothly and secures collision of objects
Can be detected.

[0010]

EXAMPLES An example of the present invention shown in FIGS. 1 to 3 will be described below.

FIG. 1 is a schematic plan view of an underframe 2 portion of a moving unit shelf 1 of this embodiment. Three pairs of front and rear wheels 3 mounted on the three rails 6 are provided, and the three rear wheels 3 are fitted to one rotation shaft 4 so that the motor 5 rotates the rotation shaft 4. By rotating the wheels 3 at the same time, the moving unit shelf 1
Can be run in the front-back and depth directions.

In front of the underframe 2 on one of the front faces, four safety bars 7 are arranged in a horizontal line along the underframe 2. Support members 10 for the underframe 2 are provided near the left and right ends of each safety bar 7, and are attached to the underframe 2 via the support members 10 (see FIG. 2).

As shown in FIG. 3, the safety bar 7 has a channel shape with a U-shaped cross section, and is attached with its opening side facing the underframe 2. The support member 10 is the vertical plate 7 of the safety bar 7.
From the outside, attach the rod 11 applied to
A rod 11 is projectingly provided to the underframe 2 by being screwed by a coil spring 13 is fitted and inserted into the rod 11, and a hollow bolt 14 having a through hole formed in the center is fitted from the head side. A rod that is inserted and slidably penetrates the hollow bolt 14.
A retaining plate 15 is fixed to the end of 11.

Therefore, the rod 11 screwed together with the safety bar 7 is slidably supported by the hollow bolt 14, and the coil spring 13 is provided between the vertical plate 7a of the safety bar 7 and the head of the hollow bolt 14. Hollow bolt
The safety bar 7 can be pressed against the coil spring 13 against the coil spring 13.

The hollow bars 14 of the supporting members 10 provided on the right and left sides of the safety bar 7 are fitted into the mounting holes 2a on the underframe 2 side and tightened with nuts 16 from the inside, whereby the safety bar 7 is underframed. 2 (see FIG. 3).

When the safety bar 7 is pushed, the coil spring
The safety bar 7 is displaced against 13, but when the external force disappears, it can be returned to its original position by the coil spring 13.

A limit switch 20 is mounted inside the safety bar 7 thus mounted. A limit switch 20 is fixed on a horizontal plate 7b below the safety bar 7 in the vicinity of the supporting member 10 by a mounting screw 21.
The movable piece 20a of the limit switch 20 projects toward the underframe 2.

Therefore, when the safety bar 7 is pushed and displaced by an external force, the movable piece 20a comes into contact with the underframe 2 and is pushed, and the limit switch 20 opens the contact. That is, the limit switch 20 is a b-contact switch, and when the external force is released, the safety bar 7 returns to the original position and the limit switch 20 also short-circuits the contact.

Two such limit switches 20 are mounted on the left and right of each safety bar 7, both are connected in series by an electric wire 22, and the electric wire 22 itself is wired in the safety bar 7. Another return electric wire 23 is wired in the safety bar 7, and connectors 24 are provided at both left and right ends of the electric wires 22, 23.

Therefore, after the four safety bars 7 are attached to the underframe 2, the electric wires 2 wired to the adjacent safety bars 7
Wiring is easy by connecting the end connectors 24 of 2 and 23. Since the connector 28 is also provided at the end of the electric wire 27 of the safety bar wiring extending from the control board 26 provided on one side plate, the electric wire end connector of the safety bar 7 located on the outermost side. 24 is adapted to be mated with connector 28.

In this way, when the adjacent connectors 24 and the connector 24 and the connector 28 are combined,
Wires 22 and 23 connecting the limit switches 20 in series form a loop, and when all the limit switches 20 are inactive because no external force is applied to the safety bar 7.
23 loops are conducting, but either safety bar 7
When the limit switch 20 is actuated by hitting a foreign substance, the loop of the electric wires 22, 23 is opened, and the control substrate 26 can detect the impact of the foreign substance.

Since the present embodiment has the wiring structure as described above, the electric wire 8 for the motor is laid inside the underframe 2, and the electric wires 22 and 23 wired to the limit switch 20 are inside the underframe 2. Wiring in the underframe 2 can be simplified because it is not wired.

By mounting the limit switch 20 in the safety bar 7 and wiring the electric wires 22 and 23 in the safety bar 7, one safety bar 7 is integrally provided with the limit switch 20 and the electric wires 22 and 23. Since it can be handled as a unit, it is extremely convenient to handle, and when mounting on the underframe 2, it is sufficient to mount the unitized safety bar 7 via the support member 10 and join the connectors 24 together. . The safety bar 7 can be easily removed and maintenance can be performed easily.

Next, another embodiment will be described with reference to FIGS.
It will be explained based on. The moving unit shelf 40 of this embodiment is also substantially the same as that of the above embodiment except the structure related to the safety bar.

In the present embodiment, as shown in FIG. 4, several safety bars 42 are arranged in a line in front of the underframe 41, and each safety bar 42 is arranged in a row.
Two limit switches 43 are arranged in the left and right, respectively.

The safety bar 42 is mounted on the underframe 41 via a mounting board 44.
The limit switch 43 is installed on the mounting board 44.
It is mounted on the vehicle and is covered by the safety bar 42 (Fig. 6).
reference). That is, the mounting board 44 has a substantially L-shaped cross section as shown in FIGS. 6 and 7, and a vertical plate 44a thereof is abutted and fixed to the underframe 41, and a horizontal plate 44b is projected forward. The corners are formed with an extended portion 44c which is bent rearward from below to fit the lower edge of the front portion of the underframe 41.

Limit switches 43 are mounted on the left and right on the horizontal plate 44b, and the case of the limit switch 43 is penetrated by a bolt 45 projecting upward by fitting a head into a groove 44d of the horizontal plate 44b and nuts. It is screwed and fixed at 46 (see FIG. 6). The upper portion 44d of the vertical plate 44a is displaced slightly forward to form a gap with the underframe 41.

On the other hand, a safety bar 42 covering the front of the mounting board 44
Comprises a front plate 42b which is bent obliquely downward from the upper plate 42a and then extends vertically downward, and a lower plate 42c which is bent rearward from the front plate 42b. The vertical plate of the upper plate 42a and the mounting substrate 44 is
Hinges 47 are attached to the left and right ends between the upper portion 44d of 44a.

That is, one piece of the hinge 47 is stacked on the upper portion 44d of the vertical plate 44a and fixed by bolts 48 and nuts 49, and the other piece is stacked under the upper plate 42a of the safety bar 42 and bolts 50 and nuts 51.
The safety bar 42 is supported by the mounting board 44 so as to be swingable from the front side to the upper side.

The mounting substrate 44 pivotally supported by the hinge 47 in this way
The limit switch 43 is arranged in the space between the safety bar 42 and the safety bar 42, the electric wire 52 extending from the limit switch 43 and the return electric wire 53 are wired in the space, and the connector 54 at the end of the electric wires 52, 53. Is also in the space (see FIGS. 4 and 8).

As described above, the limit switch 43 is internally provided.
Further, the safety bar 42 in which the electric wires 52 and 53 are arranged and which is unitized with the mounting board 44 is mounted on the underframe 41.

The vertical plate 44a of the mounting substrate 44 is applied to the vertical wall of the underframe 41, the extending portion 44c bent backward is aligned with the lower edge of the underframe 41, and the hinge bar 47 is opened with the safety bar 42 open upward. The leaf spring 55 is applied to the vertical plate 44a below, and both the leaf spring 55 and the vertical plate 44a are penetrated and the screw 56 is screwed to the underframe 41 to
On the other hand, the mounting substrate 44 is fixed together with the leaf spring 55 to be fixed (see FIGS. 7 and 8).

The leaf spring 55 has a mountain shape with a left piece 55b and a right piece 55c projecting obliquely forward from a central portion 55a fixed by a screw 56, and the ends of the left and right pieces 55b, 55c are slid backward. (See Figure 5). Left and right pieces 55b, 55c of the leaf spring 55
Is brought into contact with the back side of the front side plate 42b of the front safety bar 42 to support the safety bar 42 by a spring force.

Therefore, when an object collides with the safety bar 42 and is pushed, the safety bar 42 is displaced rearward against the leaf spring 55, but when the external force disappears, the leaf spring 55 returns to its original state. it can.

A stop spring 57 is installed between the safety bars 42 adjacent to each other. Stop spring 57
Is shown by a broken line in FIG. 5 and also shown in FIG.
It is composed of a central plate portion 57a which is long in the front-rear direction and whose rear end is bent upward, and a connecting portion 57d which connects the left and right rectangular plate portions 57b and 57c, respectively, and the left and right plate portions 57b and 57c are located slightly above the central plate portion 57a. It is connected by a connecting portion 57d which is positioned and inclined.

A flat groove 42 is formed on the lower surface of the lower plate 42c of the safety bar 42.
d is formed to be oriented in the left-right direction, and both ends and a lower part are opened. The left plate portion 57b of the stop spring 57 is fitted and inserted into the groove 42d from this right end opening, and the right plate portion 57c is formed on the adjacent safety bar 42. A central plate 57a, which is inserted into the groove 42d from the left end opening and extends rearwardly between the safety bars 42, has its rear end folded back upward and elastically deformed at the edge of the extending portion 44c of the mounting substrate 44 to be locked. (See FIGS. 6 and 7). By this locking, the lower portion of the safety bar 42 is regulated so as not to swing forward more than necessary.

By the way, the limit switch in the safety bar 42
Reference numeral 43 is a b-contact switch, and its movable piece 43a extends obliquely forward and its end is in contact with the back surface of the safety bar 42. The electric wire 52 is connected to the terminals 43b and 43c of the limit switch 43, and the two limit switches 43 in one safety bar 42 are electric wires.
52 are connected in series, and both ends thereof are connected to one terminal of the connector 54, and the other end of another electric wire 53 wired in the safety bar 7 is connected to the other terminal of the connector 54.

When the unitized safety bar 42 is attached to the underframe 41 and adjacent connectors 54 are joined together, all the limit switches 43 are connected in series, and the connector 54 itself is placed in one of the safety bars 42. Will be placed.

The outermost connector 54 is connected to the end connector of the electric wire extending from the control board provided on the side plate of the moving unit shelf 40 as in the above embodiment.

The structure of the safety bar 42 of this embodiment is as described above. When any one of the safety bars 42 collides with an object and is displaced rearward, the movable piece of the limit switch 43 near the displacement point is moved.
43a swings to open the contact and cut off the current flowing through the electric wires 52 and 53, which can be detected by the control board. Therefore, it is possible to immediately stop the traveling of the mobile unit shelf 40 and prevent an accident from occurring.

Also in this embodiment, since the wires 52 and 53 of the limit switch 43 are not wired in the underframe 41, the wiring in the underframe 41 can be simplified, and the wiring of the limit switch 43 is incorporated in the safety bar 42. Because it is unitized,
The safety bar 42 equipped with the limit switch 43 is easy to handle and can be easily attached and detached .

[0042]

According to the present invention, since the wiring of the emergency switch is carried out in the safety bar, the wiring on the main body side of the unit shelf can be simplified, and the safety bar can be installed between the emergency switch and its electric wire
Handled as a unit with a connector
There are easy, to facilitate the installation work in the field, it is also easy maintenance. Safety bar pivoted on top
Oscillates by the collision of and activates the emergency switch
This allows the safety bar to operate smoothly with a simple structure
The contact can be reliably detected.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an underframe portion of a transfer unit shelf of an embodiment according to the present invention.

FIG. 2 is an exploded plan view of the relevant part.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a schematic plan view in which an underframe portion of a moving unit shelf of another embodiment is partially omitted.

FIG. 5 is a plan view of an essential part with a safety bar omitted.

6 is a sectional view taken along line VI-VI in FIG.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a view on arrow VIII in FIG. 5 with the safety bar omitted.

9 is a view on arrow IX in FIG.

FIG. 10 is a schematic plan view of an underframe portion of a conventional moving unit shelf.

[Explanation of symbols]

1 ... Moving unit shelf, 2 ... Underframe, 3 ... Wheels, 4 ... Rotation axis, 5
… Motor, 6… Rail, 7… Safety bar, 8… Electric wire, 10…
Support member, 11 ... Rod, 12 ... Bolt, 13 ... Coil spring, 14 ... Hollow bolt, 15 ... Lock plate, 16 ... Nut. 20 ... Limit switch, 21 ... Mounting screw, 22,23 ... Wire,
24 ... Connector, 26 ... Control board, 27 ... Electric wire, 28 ... Connector, 30 ... Moving unit shelf, 40 ... Moving unit shelf, 41 ... Underframe,
42 ... Safety bar, 43 ... Limit switch, 44 ... Mounting board,
45 ... Bolts, 46 ... Nuts, 47 ... Hinges, 48 ... Bolts, 49 ...
Nuts, 50 ... Bolts, 51 ... Nuts, 52, 53 ... Electric wires, 54 ...
Connector, 55 ... Leaf spring, 56 ... Screw, 57 ... Stop spring.

Claims (2)

[Claims] 1. At the time of focusing, the frontages adjacent to each other collide with each other,
And in a moving shelf configured so as to form a space corresponding to a passage between any adjacent unit shelves in the unit shelf group arranged so as to be movable in the depth direction, Safety bar operated by collision of objects in the frontage
The a, said emergency switch Tong'an actuated by operation of the safety bar
A connector is installed in all bars and extends from the emergency switch to the end of the wire.
And the safety bar is connected to the emergency switch from the emergency switch.
The electrical wire that extends and the connector that is provided at the end of the electrical wire
And the connector is a unit, and the connector is an electric wire on the main body side of the unit shelf or adjacent
It can be connected and disconnected freely with the electric wires on the safety bar side that are aligned together.
Safety bars movable rack of the wiring structure, characterized in that it is. 2. The safety bar has an upper portion pivotally supported so as to collide with an object.
It is characterized by swinging by contact and actuating the emergency switch
The wiring structure for a mobile shelf with a safety bar according to claim 1.