JPH0537946Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a picking device that can easily perform picking operations.

Prior Art In order to facilitate the work of picking items stored on shelves and transferring them to containers, a trolley was moved along the shelf booth, and the picked items were placed from the shelf booth into the containers on this truck. . In order to always maintain the work surface at a height that makes it easy to work, regardless of the weight or quantity of the items, the product placement table is made vertically movable so that the upper surface of the topmost container stacked on the product placement table is Various types of devices have been proposed in which the height is maintained at a constant level.

In Japanese Patent Publication No. 50-1062, one end of a spring that expands and contracts according to the weight of an article placed on it is
An automatic vertically movable trolley is shown in which a guide bar that is inclined with respect to a support that supports a mounting table in a vertically movable manner is engaged with a rolling roller. When the weight of the article placed on the platform of this cart reaches a value sufficient to stretch the spring, the rollers roll down on the guide bar and the platform also lowers together.

As a result, the height of the top of the items stacked on the mounting table from the floor is maintained approximately constant, and work at the same height is maintained regardless of the weight and number of items placed on the mounting table. It becomes possible to work on the surface.

Furthermore, when an article is removed from the mounting table, the spring contracts as the weight decreases, causing the mounting table to rise. As a result, the top of the article on the mounting table is similarly maintained at a substantially constant height above the floor.

In addition, in Japanese Utility Model Publication No. 51-47328, a roller that moves up and down with a spring along a guide bar is attached to the end of the spring, protrusions or depressions are formed at multiple locations on the guide bar, and a loading platform is adapted to the up and down movement of the roller. A work cart of the type that is raised and lowered in conjunction with each other is shown.

Furthermore, in Japanese Utility Model Publication No. 54-16427, a hydraulic cylinder equipped with a cylinder and a piston is arranged parallel to the spring at both ends of the spring.
An automatic vertically movable work cart is described in which an upper chamber and a lower chamber of a cylinder separated by a piston are communicated via a valve.

Problems to be solved by the invention However, in the method of expanding and contracting a spring according to the weight of the article to be placed and moving the loading table up and down, the expansion and contraction of the spring depends on the weight of the article, The amount of vertical movement of the placing table does not correspond accurately to the height of the article. For example, when a light item is placed on the table, the distance from the floor to the item on the platform is greater than when a heavy item is placed on it.
The work surface is not always at a constant height.

Moreover, as a recent trend, when carrying out work such as transferring articles, a method has been adopted in which the articles are stored in a regular container such as a folding container and the regular container is moved together. In this case, the distance from the floor to the top of the containers on the mounting table is determined by the number of containers stacked on the mounting table.

Therefore, a loading platform that moves the loading platform up and down according to the number of stacked containers is needed, but so far, the height of the topmost stacked containers is maintained at an accurate constant height. There are no suggestions for what can be done.

Means and Effects for Solving the Problems The present invention was devised in view of the above problems, and allows the mounting table to be moved up and down accurately with simple operation, from the floor surface to the work surface. To provide a picking device that can maintain the height of a pick at an optimum constant height.

This picking device includes a picking cart that can run on the floor, a loading platform that can support stacked regular containers and is attached to the picking truck so that it can move up and down, and a loading platform that is capable of constantly lifting the loading platform upward. a spring that biases the
a pushing means that can be operated to push down the loading platform downward by overcoming the spring force of the spring;
A ratchet wheel that can be rotated forward and backward in response to the lifting and lowering of the loading platform, and a locking pawl is engaged with the ratchet wheel each time the loading platform is raised by one fixed container, thereby causing the spring of the spring to spring. a ratchet wheel mechanism that prevents the load platform from rising due to force; a ratchet wheel lock release mechanism that can release the ratchet lock of the ratchet wheel mechanism; A clutch shaft, a one-way clutch that overcomes the spring force of the spring and transmits rotational force only in the direction of lowering the loading platform and blocks rotational force in the opposite direction, and the ratchet wheel rotating shaft and the clutch shaft are mutually connected. The present invention is characterized by comprising a fitting/disengaging clutch that engages and disengages freely, and a load platform lowering operation member that rotates the one-way clutch in a direction to lower the load platform.

The loading platform in this picking device is constantly subjected to a force that tends to move upward due to a spring force. In steady state, upward movement of the loading platform is restricted by the ratchet wheel mechanism.

When the locked state of the ratchet wheel mechanism is released, the load platform is raised by the spring force.
At this time, the loading platform rises until the ratchet pawl engages with the notch of the ratchet again, that is, by the height of the single standard container.

Therefore, after storing the articles in the uppermost regular container of the loading platform and transferring them from the picking device to a belt conveyor, etc. and removing the uppermost container, when releasing the locked state of the ratchet wheel mechanism, it is necessary to The regular container rises by its thickness. the result,
It becomes possible to perform picking work at a constant height from the floor.

Further, after all the regular containers have been delivered to the belt conveyor, the loading platform is lowered to the initial low position by operating the clutch.

Example The embodiments shown in the drawings will be described below.

As shown in FIG. 1, the picking device 1 of this embodiment includes, for example, a large number of shelf booths, and a plurality of shelves 2 arranged in parallel facing each other.
and a belt conveyor 3 provided between these shelves 2 along the opening direction, allowing the user to freely move on the floor 4 between them.

Then, the fixed-shaped container 5 is transferred from the fixed-shaped container cart 6 in which a plurality of folded fixed-shaped containers 5 are stacked.
and assemble the uppermost regular container 5.

Articles are transferred to the assembled regular container 5 from a predetermined shelf space of the shelf 2, and the regular container 5 containing a predetermined amount of articles is carried out by a belt conveyor 3.

The picking device 1 includes a shelf 2 and a belt conveyor 3.
A vertical member 7, and a horizontal member 8 provided so as to protrude forward from both sides of the lower part of the vertical member 7 so as to be able to move freely on the floor surface 4 between the vertical member 7 and the vertical member 7.
A wheel 9 is rotatably attached to the wheel.

A handle support leg 10 is erected near the front end of each horizontal member 8, and a handle 11 is fixed to the upper end of the handle support leg 10. One end of each of the left and right handles 11 is attached to the left and right sides of the vertical member 7, and the front end is bent inward to form a grip portion 12. As a result, the space 13 opened to the front side
is formed.

Reference numeral 14 denotes a loading table, which is provided so as to be able to move vertically at the center of the vertical member 7. That is, channel-shaped guide rails 15 are installed at left and right positions at a certain distance from the center of the vertical member 7 in the opening direction, as shown in FIGS. 6 and 7.
are provided in the vertical direction of the vertical member 7. 16
is a guide roller that rolls along the guide rail 15, and is pivotally attached to the rear end of the loading platform 14. Further, the regulating roller 17 is oriented in the horizontal direction perpendicular to the axis of the guide roller 16 and the loading table 14 is
The regulating roller 17 also rolls along the bottom surface of the guide rail 15. Vertical member 7
On the left and right sides are reels 19 that wind up leaf springs 18 that always urge the load platform 14 upward.
The lower ends of the leaf springs 18 are connected to arm portions 20 extending laterally from both ends of the load platform 14. In addition, a brake roller 2 is provided at the center of the loading table 14 as shown in FIGS. 6 to 9.
1 is rotatably provided. This brake roller 21 is in sliding contact with a brake rail 22 provided on the vertical member 7 side and extending in the vertical direction.

Further, an endless chain 24 is spanned between a sprocket wheel 23 and a wheel 25 provided above and below the vertical member 7, and a loading platform 14 is tied to this chain 24.

A ratchet wheel 27 is provided on the outer side of the sprocket wheel 23, sharing the same axis as the shaft 26 of the sprocket wheel 23. A bearing 28 rotatably supports the shaft 26, and is provided on the vertical member 7 side. A clutch 29 is similarly attached to the shaft 26 inside the sprocket wheel 23.

Reference numeral 30 denotes a ratchet pawl that engages with the ratchet wheel 27, and is linked to a cam 33 via a pair of ratchet pawl release levers 31 and 32, as shown in FIG. These ratchet claws 3
0 and the ratchet pawl release levers 31 and 32,
Springs 34, 35, and 36 are attached to each of them and biased in a predetermined direction.

The ratchet pawl 30 and the ratchet pawl release levers 31 and 32 are located at fulcrums 30a and 31a, respectively.
It is rotatably provided around 32a.
The spring 34 attached to the ratchet pawl 30 releases the ratchet pawl release levers 31 and 3.
The spring 36 has a larger elastic force than the second springs 35 and 36, and the spring 36 has a larger elastic force than the spring 35.

Further, the upper end of the ratchet pawl 30 has a tip portion 3 that engages with a notch 27a formed in the ratchet 27.
0b is formed, and a notch 30c is formed at the lower end.
is formed. 31b is an engaging protrusion formed at the upper end of the ratchet pawl release lever 31, which engages with the notch 30c of the ratchet pawl 30.

Furthermore, an engagement protrusion 31c is provided at the lower end of the ratchet pawl release lever 31, and this engagement protrusion 31c
The engaging protrusion 31c is the engaging protrusion 3 formed at the upper end of the ratchet pawl release lever 32.
It meshes with 2b.

Furthermore, a pivot shaft 37 to which a cam 33 is attached
is supported at or near both ends by bearings 38, and is linked to a lifting lever 40 via a joint 39. This lifting lever 40 can be moved manually in the direction of the arrow, and 41 is a stopper that restricts the swing range of the lifting lever 40. Further, a return spring 42 is connected to the middle of the pivot shaft 37, so that when the lift lever 40 is released, the lift lever 40 moves in the opposite direction to the arrow.
It is designed to energize and return to the normal position.

Reference numeral 43 designates a mating clutch that engages with the clutch 29, and is provided so as to be movable in the axial direction with respect to the shaft 45 by means of a sliding key 44, as shown in FIG. The shaft 45 is supported by a bearing 46, and a one-way clutch 47 is provided at the other end.

Reference numeral 48 denotes a swinging lever that moves the clutch 43 in the axial direction of the shaft 45, and swings left and right about a fulcrum 49 as shown in FIG. Swinging rod 48
is constantly biased toward the right in FIG. 7 by a spring 50.

51 is a wire whose tip is attached to the swinging rod 48, and sheaves 52, 53 and a spring 56.
The clutch lever 54 is reached through the clutch lever 54. This clutch lever 54 pivots in the direction of the arrow about a fulcrum 55, and is biased in the opposite direction by the spring 50 in a steady state.

57 is a sprocket provided integrally with the one-way clutch. One end of the chain 58 wound around this sprocket 57 is connected to a fixed part 60 via a spring 59, and the other end is connected to a link 61,
It is connected to the foot lever 63 via 62. Note that 64 is a bearing that rotatably supports the link 62.

Next, the operation of the picking device 1 explained above will be explained.

As shown in FIG. 2, a regular container truck 6 on which a plurality of folded regular containers 5 are stacked is inserted from the front of the picking device 1. At this time, the height of the loading platform 14 is adjusted to the lowest position, which is slightly lower than the bottom surface of the regular container truck 6.

In this state, pull the lift lever 40 toward you, that is, in the direction of the arrow in FIG. 10. This turning of the lifting lever 40 is transmitted to the turning shaft 37 as rotational force, causing the cam 33 to rotate. This rotation of the cam 33 releases the locked state of the ratchet pawl 30.

This locked state will be explained in detail with reference to FIG. 12.

In the initial state, the tip of the ratchet pawl 30 is bitten into the notch 27a of the ratchet wheel 27, as shown in FIG.
7 is braking. At this time, the ratchet claw 30
A spring 34 urges the tip of the ratchet pawl 30 toward the notch 27a.

By pulling the lift lever 40 toward you, the pivot shaft 37 rotates, and the cam 3 fixed to the pivot shaft 37 rotates.
3 rotates in the direction of the arrow in FIG. 12b. As the cam 33 rotates, the ratchet pawl release lever 32
is pressed and rotates clockwise around the fulcrum 32a.

As the ratchet pawl release lever 32 rotates,
The engagement protrusion 32b is connected to the ratchet pawl release lever 31.
A rightward force is applied to the engaging protrusion 31c provided at the lower end of. Therefore, the ratchet claw release lever 31
rotates counterclockwise about the fulcrum 31a, and the engaging protrusion 31b formed at the upper end presses the notch 30b of the ratchet pawl 30 to the left.

As a result, the ratchet pawl 30 rotates clockwise about the fulcrum 30a, and the distal end 30a is released from the notch 27a of the ratchet wheel 27.

In this state, the force of the leaf spring 18 that urges the loading platform 14 acts, and the loading platform 14 rises.
The rise is transmitted to the sprocket wheel 23 via the chain 24. Accordingly, the sprocket wheel 23 and the ratchet wheel 27 provided coaxially therewith rotate in a direction that raises the loading platform 14.

By the way, the ratchet pawl 30 is connected to the spring 34.
is urged in a direction to be pressed against the circumferential surface of the ratchet wheel 27. Therefore, the first
As shown in Figure 2c, the ratchet pawl release lever 3
The engagement protrusion 32b of 2 is the ratchet claw release lever 3.
After getting over the first engaging protrusion 31c, the ratchet claw release lever 31 and the ratchet claw 30 instantly return to their original positions.

Then, the ratchet wheel 27 rotates once, and the notch 27a is inserted into the tip 3 of the ratchet pawl 30.
0a, the tip 30a of the ratchet pawl 30 engages with the notch 27a. As a result, the engagement state is established again, and the load platform 14 stops rising.

When the lift lever 40 is released, the pivot shaft 37 rotates in the opposite direction due to the elastic force of the return spring 42. This causes the cam 33 to rotate clockwise as shown in FIG. 12d. When the cam 33 rotates, the ratchet pawl release lever 32 rotates counterclockwise, and its engagement protrusion 32b passes over the engagement protrusion 31c of the ratchet pawl release lever 31. Return to the initial state shown in Figure a.

In this way, by locking the ratchet pawl 30 to the ratchet wheel 27, the loading platform 14
is braked. Furthermore, when the locked state is released, the load platform 14 is raised by the force of the leaf spring 18. Therefore, if the circumferential distance of the notch 27a formed in the ratchet wheel 27 is made to match the height of the regular-shaped container 5, the load can be adjusted every time the ratchet wheel 27 and the ratchet pawl 30 are engaged and released. Stand 1
4 rises by an amount equivalent to the height of the regular container 5.

Then, the regular container 5 at the top of the picking device 1 is assembled, and a picking operation of storing predetermined articles from the shelf 2 into the regular container 5 is performed. After the picking operation is completed, the regular container 5 containing the articles is transferred to the belt conveyor 3 and conveyed.

Then, by pulling the lift lever 40,
The next regular-sized container 5 is lifted up, and in the same manner, the regular-sized container 5 is assembled, loaded from the shelf 2, and transported by the belt conveyor 3.

When this operation is repeated until there are no more regular containers 5 on the loading platform 14, the clutches 29 and 43 are engaged by operating the clutch lever 54. When the foot lever 63 is depressed in this state, the shaft 44 and the clutches 44, 29 are rotated counterclockwise in FIG. 11 via the one-way clutch 47, and the chain 24 is fed in the direction of the arrow. As a result, the loading platform 14 is lowered to the initial lowest position.

Loading platform 14 lowered by picking device 1
Then, the regular container 5 on another container trolley 6 is transferred, and the same operation is repeated to move the container to the shelf 2.
Goods are loaded and unloaded from there.

In addition, in the above-described embodiment, a picking operation using a foldable regular container was explained, but the present invention is not limited to this, and for example, picking work using a regular container with a fixed height is explained. The same applies to the picking operations used. Further, although the clutch lever 54 is provided separately from the foot lever 63, it is also possible to omit the clutch lever 54 and use a mechanism that is linked to the swinging of the foot lever 63 as a mechanism for connecting the clutches 29 and 43. can.

Effects of the invention As explained above, when the picking device of the present invention is used, the top surface of the loaded fixed container can be maintained at a constant height that is most appropriate for the work, regardless of the weight difference between each fixed container. .

Therefore, picking work to take out predetermined articles from the shelf booth becomes easy.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing the positional relationship of the shelves, the belt conveyor, and the picking device of the present invention;
FIG. 2 is a diagram showing a state in which a regular container is received from a regular container truck, FIG. 3 is a front view showing the picking device according to an embodiment of the present invention, FIG. 4 is a side view of the same, and FIG. 5 is a plan view of the same. Fig. 6 is a plan sectional view, Fig. 7 is a longitudinal sectional view, Fig. 8 is a side sectional view, Fig. 9 is a schematic diagram showing the relationship of each member, and Fig. 10 shows the mechanism for lifting and braking the loading platform. 11 is a diagram showing the relationship between the clutch lever and the foot lever, and FIG. 12 is a diagram showing the operation of the ratchet wheel lock release mechanism. 1...Picking device, 2...Shelf, 3...Belt conveyor, 4...Floor surface, 5...Standard container, 6...
... Fixed container trolley, 7 ... Vertical member, 8 ... Horizontal member, 9 ... Wheel, 10 ... Handle support leg, 11
...Handle, 12...Grip part, 13...Space part,
14... Loading platform, 15... Guide rail, 16
...Guide roller, 17...Regulation roller, 18...
... leaf spring, 19 ... reel for leaf spring, 20 ... arm, 21 ... brake roller, 22 ... brake rail, 23 ... sprocket wheel, 24 ...
... Chain, 25 ... Wheel, 26 ... Shaft, 27 ... Ratchet wheel, 28 ... Bearing, 29 ... Clutch, 30 ... Ratchet pawl,
31... Ratchet claw release lever, 32... Ratchet claw release lever, 33... Cam, 34, 36
... Spring, 37 ... Swivel shaft, 38 ... Bearing, 39 ... Joint, 40 ... Lifting lever,
41... Stopper, 42... Return spring, 43...
...clutch, 44 ... sliding key, 45 ... shaft, 46 ... bearing, 47 ... one-way clutch, 48 ... swinging rod, 49 ... fulcrum, 50 ... spring, 51 ... wire, 52, 53 ...Sheave, 5
4...clutch lever, 55...fulcrum, 56...
Spring, 57... Sprocket, 58... Chain, 59... Spring, 60... Fixed part, 61, 62
... Link, 63 ... Foot lever, 64 ... Bearing. 28a to 29a... fulcrum, 28b... tip, 28c... notch, 29b... engaging protrusion,
29c...Engagement protrusion, 30b...Engagement protrusion.

Claims (1)

[Scope of utility model registration request] A picking cart that can run on the floor, a loading platform that can support stacked containers and that is attached to the picking truck so that it can move up and down, and a spring that always biases the loading platform upward. a pushing means that can be operated to push the load platform downward by overcoming the spring force of the spring; a ratchet wheel that can be rotated in forward and reverse directions in response to the elevation and descent of the load platform; and the shaped container. A ratchet wheel mechanism in which a locking pawl engages the ratchet wheel each time the loading platform rises by one vehicle to prevent the loading platform from rising due to the spring force of the spring; a ratchet wheel lock release mechanism capable of releasing the ratchet lock; a clutch shaft disposed on the rotational axis of the ratchet wheel;
A one-way clutch that overcomes the spring force of the spring and transmits rotational force only in the direction of lowering the loading platform and blocks rotational force in the opposite direction, and the ratchet wheel rotating shaft and the clutch shaft can be freely engaged and disengaged from each other. 1. A picking device comprising a fitting/disengaging clutch for locking, and a load platform lowering operation member for rotating the one-way clutch in a direction to lower the load platform.