JP2000043730A - Push back storing truck device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lighten an entire structure and reduce a production cost. SOLUTION: Plural trucks 51, 52, 53, 54, 55 are guided runnably and movably on a pair of straight guide rails 1, 1 arranged parallelly in a front down shape and each truck has a placing stand 7 whose upper surface is positioned on the upperside than the straight guide rails 1, 1 and the placing stand 7 of each truck has a different height from the other stand and when all trucks are moved frontward the straight guide rails 1, 1 by a gravity action, every placing stands 7 of these trucks are positioned to the most front place of the straight guide rails 1, 1 so as to be piled up. Meantime, the section of the straight guide rails 1, 1 is formed by a square cylindrical member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-back storage trolley device capable of efficiently storing a fixed load such as a pallet.

[0002]

2. Description of the Related Art Japanese Patent No. 2694519 discloses a push-back storage trolley device in which a plurality of trolleys are guided so as to be able to travel and move on a pair of linear guide tracks arranged in parallel in a forward-downward shape. ing. In this device,
In consideration of the centripetality of the bogie in the width direction of the guide track, each of the pair of guide tracks is formed of an I-beam.

In the use of this device, after a load is placed on one truck, the truck and the load are pushed rearward against the forward force due to the gravitational action, and thereafter, the truck and the load are moved to another truck. After loading the cargo on one of the trucks, the truck and the truck are repeatedly pushed and moved backward together with the preceding truck and the cargo against the forward force due to the gravitational action, and all the trucks are loaded. It is made to put on the body.

[0004]

In the conventional push-back storage cart apparatus described above, since the guide track is formed of a commercially available I-shaped steel, the strength becomes unnecessarily large and the manufacturing cost is high. is there. The present invention is primarily directed to addressing this.

[0005]

In order to achieve the above object, according to the present invention, a plurality of bogies are guided by a pair of straight guide tracks which are arranged in parallel in a downwardly forward manner so as to be able to travel freely. Has a horizontal mounting table whose upper surface is located above the directly above guide track, the mounting table of each truck is made different in height from the others, and all the trucks move forward of the guide track by the action of gravity. When the carriage is moved, all of the mounting tables of the bogies are positioned at the forefront portion of the guide track so as to be in a stacked state. In this case, the guide track is formed of a square tubular steel material having a rectangular cross section.

[0006] Square tube steel materials having the required strength are available at a low cost, and the supporting structure thereof is also relatively lightweight, resulting in low cost.

[0007] The present invention is embodied as follows. That is, each truck has traveling wheels mounted on leg members extending downward from front and rear portions on the left and right sides of the mounting table, and the front and rear traveling wheels on the left and right sides correspond to upper surfaces of corresponding guide tracks. In this case, each running wheel has a circumferential surface portion supported on the upper surface portion, and a flange portion protruding outward in the radial direction at at least one edge of the circumferential surface portion. With
Further, each carriage is restricted from being laterally displaced from a pair of guide tracks by engagement of the flange portion and each guide track.

Further, there is provided a jumping-up restricting means for restricting the bogie from jumping up in a state where the rearmost bogie having the highest mounting table is located at the foremost position of the guide track.

This jump-up restricting means can be formed in various ways, for example, a truck-side engaging piece fixed to the truck having the tallest mounting table, and a track-side engaging member fixed to the pair of guide tracks and the truck. When the rearmost truck is positioned at the forefront of a pair of guide tracks, the vertical relative displacement of the two engagement pieces is regulated within a certain limit.

[0010]

1 shows a push-back storage trolley device according to the present invention, wherein A is a plan view, B is a side view, FIG. 2 shows the storage trolley device, and A is the foremost part of a guide track. FIG. 3B is a diagram of the truck group in a stacked state at a location viewed from the front, B is a diagram of the truck group viewed from the rear, FIG. 3 is a partial front view showing the periphery of running wheels of the truck, and FIG. It is a side view of a pushback storage rack provided with a plurality of bogie devices.

As shown in FIGS. 1 and 2, a pair of straight guide tracks 1, 1 are arranged in parallel, and a plurality of cross beams 2 provided at appropriate intervals in the front-rear direction f1 are provided with bolts a. It is fixed by welding or welding, and is made to fall forward. At this time, each guide track 1 is formed of a tubular member having a square cross section, and a commercially available lightweight steel is used for the tubular member. 3 is a pair of guide tracks 1, 1
Are angle irons joined between the front end faces. Further, both ends of the cross beam member 2 are supported by the column members 4.
Are appropriately connected by a reinforcing member (not shown).

On the guide tracks 1 and 1, there are five trucks 51,
52, 53, 54 and 55 are guided, and each truck 5
1, 52, 53, 54, and 55 form a mounting table 7 having a rectangular frame structure by bar members 6a and 6b arranged vertically and horizontally, and legs downward from front and rear portions on left and right sides of the mounting table 7. The member 8 is extended, and a running wheel 9 is attached to the lower end of each leg member 8. At this time, a dimensional difference is provided between the front and rear leg lengths of the leg members 8 so that the upper surface of the mounting table 7 is horizontal. When the mounting table 8 is set to be horizontal as described above, the fork operation is simple and the load is stable. As shown in FIG. 3, each running wheel 9 has a circumferential surface 9 supported on the upper surface of the guide track 1.
a and a flange portion 9b formed on at least one end edge of the circumferential surface portion 9a so as to protrude radially outward.

Next, the carts 51, 52, 53, 54, 55
Will be described in more detail. First, the first carriage 51
Is set so that the upper surface of the mounting table 7 is higher than the top end surfaces of the guide tracks 1 and 1, and its width is set to be substantially the same as the entire width of the pair of guide tracks 1 and 1. Running wheels 9 via left and right outwardly oriented horizontal shafts 10 fixed to the left and right sides of the left and right sides by L-shaped strips and screws.
Is mounted, the circumferential surface portion 9a of each traveling wheel 9 is supported on the upper surface of the corresponding guide track 1, and the flange portion 9b is engaged with the inner edge of the corresponding guide track 1.

Second, third and fourth carts 52, 53, 5
4 travels via a horizontal shaft 10 extending inward in the left-right direction to a leg member 8 composed of an L-shaped band material fixed to each of the left and right sides of a front portion of the mounting table 7 and a rib material added thereto as necessary. Wheels 9 are mounted, and L is fixed to the left and right sides of the rear of the mounting table 7.
Running wheels 9 are mounted on leg members 8 made of a shape band or the like via horizontal shafts 10 facing outward in the left-right direction. A circumferential surface portion 9a of each running wheel is supported on the upper surface of its corresponding guide track 1,
In addition, the flanges 9 of the traveling wheels 9 on the right and left sides of the front of the mounting table 7 are engaged with the outer edges of the corresponding guide tracks 1, while the running wheels 9 on the left and right sides of the rear of the mounting table 7 are The flange 9b is to be engaged with the corresponding inner edge of the guide track 1.

The fifth carriage 95 has traveling wheels 9 mounted on leg members 8 made of L-shaped strips and the like fixed to the front and rear portions of the mounting table 7 via left and right inward horizontal shafts 10. And
The circumferential surface portion 9a of each traveling wheel 9 has its corresponding guide track 1
, And its flange 9b is engaged with the corresponding outer edge of the guide track 1.

At this time, the mounting tables 7 of the second, third, fourth and fifth carriages 52, 53, 54 and 55 are in this order at least larger than the thickness dimension of the mounting table 7 of the immediately preceding carriage. The height of each mounting table 7 is gradually increased according to the difference in height of the corresponding mounting table 7, and the length of the leg member 8 for each mounting table 7 is gradually increased in the order of the height. three,
The front leg member 8 of each of the mounting tables 7 of the fourth carriages 52, 53, and 54 is formed to project outward in the left-right direction more than the rear one. Reference numeral 11 denotes a buffer member fixed to the front surface of the mounting table 7 of the first carriage 51, and reference numeral 12 denotes a locking plate that stands upright at the rear end of the mounting table 7 of the fifth carriage 55.

Next, a description will be given of the jump-up restricting means 13 for restricting the fifth carriage 55 having the highest mounting table 7 from jumping up. The jump-up regulating means 13 includes four bogie-side engaging pieces 13a fixed to the fifth bogie 55 and the same body, and two right and left track-side engaging parts fixed at the forefront of the guide tracks 1, 1 and the same. And a piece 13b. Each of the cart-side engaging pieces 13a is formed by bending a strip having a width of about several centimeters into an L-shape, and is screwed to the outer ends of the horizontal shafts 10 of the left and right leg members 8 and has a tip b. Are located below the upper surface of the corresponding guide track 1 and project outward from the guide track 1.

On the other hand, the track-side engaging piece 13b is substantially the same length as the front-rear length of the mounting table 7 and has a U-shaped cross section, and is mounted on a member supporting the lower surfaces of the pair of guide tracks 1, 1. The bolt a is fixed so that the upper surface c is not higher than the upper surface of the guide track 1 and is disposed in the front-rear direction.
The front end portion b of the cart-side engaging piece 13a is made to correspond to the inside space d, and the upper surface portion c is set in the cart-side engaging piece 1.
Excessive upward displacement of the tip of 3a is restricted.

FIG. 4 is a view showing a push-back storage rack according to the present invention. This push-back storage rack has the above-described push-back storage trolley device in two stages in the height direction via a lattice structure formed of the pillar members 14 and reinforcing members (not shown), and in the left-right direction of the pair of guide tracks 1, 1. Many are juxtaposed. At this time, the floor 15 along the front of the lattice structure is generally used as a passage for a forklift, and in the illustrated example, the push-back storage trolley device is formed as a two-stage stack. It is also possible.

In such a push-back storage rack, the five trolleys 5 of each push-back storage trolley device are provided.
1, 52, 53, 54, and 55, in their free state, the traveling wheel 10 is guided by the guide tracks 1 and 1 to travel to the frontmost portion of the guide tracks 1 and 1 by the action of gravity, and after this movement, The mounting tables 7 of the carts 51, 52, 53, 54, 55 are in a stacked state as shown in part e in FIG. 1 and FIG. At this time, the movement of the first bogie 51 is restricted by the shock absorbing member 11 colliding with the angle iron 1A, and the second, third, fourth, and fifth bogies 52, 53, 54, and 55 have their own bogies. The leg member 8 is locked to that of the immediately preceding bogie, and its movement is regulated.

A load w is placed on each push-back storage trolley device.
When loading a single load w on each mounting table 7 from the front of each pair of guide tracks 1 and 1 using a forklift, the descent force of the truck due to the inclination of the guide tracks 1 and 1 is stored. And push it in. In this way, the five packages w are stored on the carts 51, 52, 53, 54, 55, and the state in a side view at this time is as shown in FIG. Finally, the load w is directly placed at the forefront location on the pair of guide tracks 1,1.

On the other hand, the carts 51, 52, 53, 54, 55
When the packages w stored on the upper and the pair of guide tracks 1 and 1 are taken out, the packages w which are not taken out are taken out one by one from the front package w in order. Is moved forward by the downward force due to the gravitational action, and is positioned at the forefront of the guide tracks 1 and 1 when the load w on the mounting table 7 is completely removed.
Then, when all the packages w on the guide tracks 1, 1 are taken out, the five carts 51, 52, 53, 54, 55 are located at the forefront of the pair of guide tracks 1, 1, These mounting tables 7 are in a stacked state as shown in part e in FIG. 1 and FIG.

In such a cargo handling operation, each truck 5
1, 52, 53, 54 and 55 reciprocate on the guide tracks 1 and 1, respectively.
The running wheels 9 of 3, 54 and 55 have a circumferential surface portion 9a supported on the upper surface of the guide track 1 and a flange portion 9b acts so as to engage with the side surface portion of the guide track 1. 5
3, 54, 55 are provided with centripetality in the width direction on the pair of guide tracks 1, 1, and do not deviate from the guide tracks 1, 1 in the width direction.

Further, the fact that each guide track 1 of each push-back storage trolley device is a light-weight steel made of a tubular member having a square cross section means that the price per unit weight of the guide track 1 is one less than that of the conventional I-shaped steel. /3.5, and significantly reduce the weight of the guide track 1 as compared with the conventional one. In connection with this reduction, the overall configuration of the push-back storage rack is reduced, and the overall cost is reduced. However, it is compressed to about 3/4 of that.

In the operation of storing the load w, the fifth carriage 5 located at the foremost part of the pair of guide tracks 1, 1.
When the load w is placed on the carriage 5, the weight of the load w acts on the front part of the mounting table 7 which protrudes greatly from the leg member 8 at the front of the carriage, and the carriage runs on the front running wheels 9, There may be a case where the rear part jumps up using the fulcrum 9 as a fulcrum.

When such an operation occurs, the left and right bogie-side engaging pieces 13a, 13a are displaced in the same manner as the fifth bogie 55, and when the amount of displacement reaches a certain degree, their leading ends are displaced. The portions b, b are restricted from interfering with the upper surface portion c of the raceway-side engaging piece 13b to be further displaced. This restricting action is exerted before the flanges 9b of the left and right traveling wheels 9, 9 at the rear of the fifth bogie 55 depart from a range where they can engage with the guide tracks 1, 1. . The above-described operation of restricting the rearward movement of the bogie 55
When the front part jumps up, the same operation is performed via the left and right bogie-side engaging pieces 13a, 13a on the front side.

In this manner, the fifth bogie 55 is surely prevented from entering the unstable posture by being far away from the pair of guide tracks 1, 1, whereby the load w received by the forklift is stabilized by the mounting table 7. It will be supported in the future.

When the load w is placed on the other carts 51, 52, 53, and 54, the above-mentioned jumping-up tends to occur.
Since the cargo is already loaded on the truck immediately after the jump of 54, the truck immediately following this and the truck trying to jump on the cargo w are interfered and regulated.

[0029]

According to the present invention described above, since the guide track is formed by a cylindrical member having a rectangular cross section, it is possible to use a commercially available lightweight steel having an appropriate strength. As a result, the weight of the entire structure can be reduced and the manufacturing cost can be significantly reduced. In the push-back storage rack as shown in FIG. 4 in which the present invention is implemented, the overall cost is reduced to about 2/3 of that of the conventional case where the guide track is an I-shaped steel.

According to the second aspect of the present invention, the carriage is prevented from being displaced laterally from the guide track by a simple structure, and according to the third aspect, the highest mounting table is provided and stability is impaired. The load can be stably loaded on the truck, and a quick and safe storage operation can be performed.
According to this, the jumping of the bogie can be restricted to a simple structure.

[Brief description of the drawings]

FIG. 1 shows a push-back storage trolley device according to the present invention, wherein A is a plan view and B is a side view.

FIG. 2 shows the storage truck device, where A is a diagram of a truck group in a stacked state at the forefront part of a guide track viewed from the front,
B is a view of the cart group as viewed from the rear.

FIG. 3 is a partial front view showing the periphery of running wheels of the bogie.

FIG. 4 is a side view of a push-back storage rack including a plurality of the storage trolley devices.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide track 51, 52, 53, 54, 55 Bogie 7 Mounting table 9 Running wheel 9a Circumferential surface part 9b Flange part 13 Jump-up restricting means 13a Bogie side engaging piece 13b Track side engaging piece

Claims (4)

[Claims] 1. A plurality of bogies are guided so as to be able to travel freely on a pair of straight guide tracks arranged in parallel in a forward-downward shape, and each bogie has a mounting table whose upper surface is located above the guide track. The carriages of each carriage have a height different from that of the others, and when all carriages move forward of the guide track due to the effect of gravity, any of the carriages of these carriages is positioned at the front of the guide track. A push-back storage trolley device, wherein the guide track is formed of a tubular member having a square cross section, wherein the push-back storage trolley device is located at a position where the guide track is formed. 2. The vehicle according to claim 1, wherein each of the carriages has a traveling wheel mounted on a leg member extending downward from front and rear portions on each side of the mounting table, and
It is assumed that the front and rear traveling wheels on the left and right sides are guided on the upper surface of one corresponding guide track, and in this case, each traveling wheel is supported on the upper surface, a circumferential surface portion, and the circumferential surface portion A flange protruding outward in the radial direction on at least one edge of the carriage, and each carriage is restrained from coming off from the guide track by engagement of the flange with each guide track. The push-back storage trolley device according to claim 1, wherein: 3. The trolley holds the mounting table in a horizontal state, and prevents the trolley from jumping under a state where the rearmost trolley having the highest mounting table is located at the forefront part of the guide track. The push-back storage trolley device according to claim 1 or 2, further comprising a jump-up restricting means. 4. The rearward bogie includes a bogie-side engaging piece fixed to the same body as the rearmost bogie, and a pair of guide tracks and a track-side engaging piece fixed to the same body. 4. The push-back storage trolley device according to claim 3, wherein when is located at the foremost point of the pair of guide tracks, the relative displacement of the two engagement pieces in the vertical direction is restricted within a certain limit.