JPH0141617Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an automatic control device for a reciprocating conveyor-type loading platform developed to facilitate cargo handling operations and improve the efficiency of the operations.

(Prior Art) In order to facilitate the loading and unloading of powder and granular materials, etc., a reciprocating conveyor-type loading platform in which the loading platform of a vehicle (freight vehicle) is movable has been developed. (Unexamined Japanese Patent Publication 1983-
No. 148106, JP-A-58-193810, U.S. Patent No.
4143760, etc.) As shown in FIG. 1, the loading platform floor a has a large number of flooring materials 1 arranged in parallel and slidably in the longitudinal direction on the horizontal joists 2 of the vehicle body, and each of these flooring materials 1 is arranged in the left-right direction between the horizontal joists 2 on the lower surface of the flooring 1, and is connected to three drive beams 3a-3c, which are slidable in the front-back direction, through connecting members 4a-4c. fixed in rotation, three groups 1a-1
It is divided into c.

Each of the drive beams 3a to 3c is a drive member 6a to 6 which is disposed on the lower surface of the horizontal joist 2 so as to be slidable in the front and rear direction by a guide member 8 via a support member 5.
Each is fixed at c. The drive member 6a~
One end of the cylinder 6c is connected to each of cylinders 7a to 7c provided on the lower surface of the flooring 1 near the rear of the vehicle body.

The operation of the floor material 1 in the case of unloading using the above-mentioned loading platform floor will be explained. (See Figure 7) When the drive switch (not shown) is turned on, the first
cylinder 7a is driven, and the flooring 1 of the first group 1a moves forward by one stroke. At this time, the second cylinder 7b and the third cylinder 7c are not driven, and therefore the cargo is not moved. (See FIG. 7A) After the forward movement of the first group 1a is completed, the second cylinder 7b is subsequently driven, and the flooring 1 of the second group 1b moves forward by one stroke.
At this time, the first cylinder 7a and the third cylinder 7c are not driven, and therefore the cargo is not moved.
(See FIG. 7B) After the forward movement of the second group 1b is completed, the third cylinder 7c is subsequently driven, and the flooring 1 of the third group 1c moves forward by one stroke. At this time, the first cylinder 7a and the second cylinder 7b are not driven, and therefore the cargo is not moved. (See Fig. 7C) When all the floor materials 1 have finished moving forward by one stroke, the three cylinders 7a to 7c are simultaneously driven in the opposite direction, and all the groups 1a to 1 are moved forward.
The floor material 1 of c moves backward by one stroke, and thereby the cargo moves backward by one stroke, making it possible to unload the cargo. (See Figure 1) By repeating this operation, the loaded cargo can be unloaded.

Also, when loading cargo, the operation is reverse to the above,
In other words, the drive switch is changed and each cylinder 7
A to 7c are individually driven to group flooring 1 into group 1.
After each group a to 1c is sequentially moved one stroke backward, all groups 1a to 1c are simultaneously moved one stroke forward.

In addition, in the above explanation, the flooring material was divided into three groups, but the size of the vehicle (loading capacity)
Some are divided into multiple groups such as 4 groups, 5 groups, and so on.

The above is an outline of the structure and operation of the reciprocating conveyor type loading platform floor, but the structure for slidably attaching the floor material 1 to the vehicle body, the interlocking mechanism of each cylinder 7a to 7c, etc. are not directly related to the present invention. Since it is the same as the conventionally known one, the explanation thereof will be omitted.

In vehicles with conventional reciprocating conveyor-type loading platform floors, some are equipped with an electric switch at the rear of the loading platform to manually stop the drive device when loading and unloading are completed, and others A light sensor is installed on the platform to automatically stop the drive device when unloading is completed, or a limit switch is installed at the front and rear of the loading platform when loading and unloading are completed. A control device that automatically stops is known.

(Problems to be Solved by the Present Invention) However, with the conventional control devices described above, the electric switch type cannot be stopped automatically, resulting in poor cargo handling efficiency, and the optical sensor type is expensive. Moreover, the automatic stop is likely to be impaired due to dirt on the sensing part, and
Since it cannot be stopped automatically during loading, not only must manual operations be performed, such as by holding down the operation button, but also when unloading, the cargo is sent to the rear one after another, causing the cargo to be stacked on pallets, etc. If the cargo was solid, there was a risk that the cargo would fall from the loading platform and be damaged. In addition, limit switch types cannot automatically stop in the middle, so if the cargo is solid such as a pallet, the loaded cargo will be sent forward one after another during loading. A gap may occur between the cargo and the cargo, reducing the loading ratio.
Furthermore, when unloading, there is a risk that the cargo may fall off the loading platform and be damaged, similar to the optical sensor type.

(Means for Solving the Problems) Therefore, the present invention was devised in view of the above-mentioned conventional problems. It is set to automatically stop even at intermediate positions so that the cargo can be loaded and unloaded properly and easily, and if the cargo is powder or granular, it can be unloaded continuously. , and the platform floor can be stopped at any position.

To this end, in the present invention, in a vehicle having a reciprocating conveyor-type cargo bed floor, the vehicle body side is located near the rear or near the front of the sliding range (i.e., one stroke) of the drive beam that moves the flooring.
A reciprocating conveyor-type loading platform is provided with a limit switch that contacts the drive beam, and an operating section that is connected to the limit switch and a cylinder drive device and that controls the movement of the flooring material at an appropriate position on the vehicle body. The intended purpose is achieved by providing an automatic floor control device.

(Example) The present invention will be described below with reference to an illustrative example.

As shown in FIG. 1, the loading platform floor a has a large number of flooring materials 1 arranged in parallel in the longitudinal direction on the horizontal joists 2 of the vehicle body A.
And each flooring material 1 is arranged so as to be slidable,
The three driving beams 3a to 3c, which are disposed in the left-right direction between the horizontal joists 2 on the lower surface of the flooring 1 and are slidable in the front-back direction, are connected to the three drive beams 3a to 3c via connecting members 4a to 4c. Fixed, three groups 1a-1
It is divided into c.

Each of the drive beams 3a to 3c is a drive member 6a to 6 which is disposed on the lower surface of the horizontal joist 2 so as to be slidable in the front and rear direction by a guide member 8 via a support member 5.
Each is fixed at c. The drive member 6a~
One end of the cylinder 6c is connected to each of cylinders 7a to 7c provided on the lower surface of the flooring 1 near the rear of the vehicle body.

As shown in FIG. 3, among the driving beams,
A support member (not shown) disposed between the horizontal joists 2, 2 is located near the vertical joist 9 of the vehicle body A located at the rear of one stroke, which is the sliding range of the rearmost drive beam 3c. A limit switch 10 is provided therebetween. Further, the rearmost driving beam 3c
A limit switch fit plate 11 that comes into contact with the limit switch 10 is provided at a portion of the lower rear edge of the lower surface corresponding to the limit switch 10.

As shown in FIG. 2, near the rear end of the side surface of the vehicle body A, a drive device b is connected to drive the limit switch 10 and each of the cylinders 7a to 7c.
An operating section c for controlling the operation of the flooring 1 is provided.

As shown in FIG. 4, the operating section c includes a counter unit 12 for setting the number of contacts between the limit switch 10 and the fit plate 11 and detecting the number of contacts, and a counter unit 12 for setting the number of contacts between the limit switch 10 and the fit plate 11, and a counter unit 12 for detecting the number of contacts,
A changeover switch 13 for selecting whether to drive 7c continuously or to stop it every set number of cycles.
A reset switch 14 and the like for re-driving each of the cylinders 7a to 7c are set.

(Function) When unloading a load, for example, a pallet 15, the cylinder 7a is moved according to the length of the pallet 15.
~7c cycle number, i.e. cylinder 7a~
The number of reciprocations 7c is set by rotating the selection knob 16 of the setting section 20 of the counter unit 12. The number of cycles is displayed in a set number display window 17 on the side of the knob 16. After that, selector switch 13
into the single acting side 13a.

As a result, the set value output circuit 19 and the first relay 18 of the counter unit 12 are closed and electricity flows, and the limit switch 10 is closed and energized, and the solenoid valve 21 is activated to operate the drive device b shown in FIG. The pressure side piping 22 side, that is, the oil feed side is open.

Therefore, the oil in the tank 23 is transferred to the pressure side piping 22.
is sent to each cylinder 7a to 7c via a switching valve (not shown), and is sent to each cylinder 7a to 7c via a switching valve (not shown).
A to 7c are sequentially driven to operate the flooring 1.

Then, the fit plate 11 comes into contact with the limit switch 10 every cycle, and at each contact, the counting coil 26 consisting of an electromagnetic coil magnet of the counter unit 12 counts, and the count is transmitted to the counting section 24 and displayed on the count display section 25.
is displayed in the setting section 20 that is set in advance.
When the set number of cycles (cycle number) is reached, the set value output circuit 19 is opened and electricity is cut off, and the first relay 18 is also cut off. As a result, the solenoid valve 21 is switched and oil flows into the tank-side pipe 27.

As a result, the driving of each cylinder 7a to 7c is stopped, and the operation of the flooring 1 is also stopped. At this time, since the pallet 15 is located at the rear of the loading platform floor a, unloading is possible.

The reset switch 14 is turned on while the pallet 15 at the rear end of the loading platform floor a is lowered to a predetermined location by a cargo handling machine such as a forklift. As a result, electricity flows through the 0 return circuit 28, and the count unit 24 returns to 0, and the set value output circuit 19 and the first relay 18 are closed, electricity flows, and the above operation is repeated.
Therefore, by repeating this operation,
The pallets 15 can be sequentially moved to the rear end of the platform floor a. Reference numeral 29 is a carry circuit, which is used when increasing the number of cycles to two or more digits.

In addition, when dropping powder particles, by switching the changeover switch 13 to the continuous side 13b, the second relay 30 closes and electricity flows, so that the solenoid valve 21
moves to continuously drive drive device b.

Also, when you want to stop the flooring 1 while it is in operation, all circuits can be turned off by turning off the switching switch 13, regardless of whether the switching switch 13 is on the continuous side 13a or the single acting side 13b. The solenoid valve 21 is switched and the cylinders 7a to 7 are shut off.
c is stopped, and the operation of the flooring 1 can be stopped.

Number 32 in FIG. 4 is a count conversion button for returning the number in the count section 24 to 0. Figure 5 Middle number 3
3 is battery, 34 is fuse. 6 is a motor, 36 is a pump, 37 is a relief valve, 38 is a filter, and 39 is a check valve provided in the tank side piping 27.

Although the aforementioned limit switch 10 is brought into contact with the rearmost drive beam 3c, the limit switch 10 is not limited to this, and may be brought into contact with the other drive beams 3a, 3b, or the limit switch 10 may be brought into contact with the drive beam 3c or 3c.
without providing the fit plate 11 on a and 3b,
The limit switch 10 may be placed in contact with the drive beam 3c or 3a, 3b, and the limit switch 10 may be placed in an appropriate position on the vehicle body side, such as the vertical joist 9 or the underside of the platform floor, as long as it is in contact with the drive beam 3c or 3a, 3b. May be installed. Further, the operation part c does not need to be provided near the rear side of the vehicle body A, and is not limited to such a position as the rear surface of the vehicle body A as long as it is easy to operate.

In addition, in the above-mentioned embodiment, the rearmost drive beam 3
The automatic control of the loading platform floor during unloading was explained by installing the limit switch 10 on the rear side of the sliding range of c. By providing it on the front side of the moving range, it is possible to automatically control the platform floor when loading cargo.

(Effects of the present invention) As described above, according to the present invention, a limit switch that contacts the drive beam is provided on the vehicle body side located near the rear or near the front of the sliding range of the drive beam that moves the flooring. and connected to the limit switch and the cylinder drive device,
An operation unit for controlling the operation of the flooring material is provided at an appropriate position on the vehicle body, and the drive device can be automatically stopped temporarily at any number of cycles, and can be operated continuously. Since it can be stopped at any position, (i) it is ideal for handling pallets of constant length;

(ii) Since the number of cycles can be varied or the machine can be stopped at any position, it can accommodate any size of cargo.

(iii) When unloading, the load is always at the rear of the loading platform, so unloading is easy, and moreover, the load will not fall and be damaged.

(iv) When loading, it is possible to create enough space to accommodate the next load, so there is no gap between the loads, which allows for efficient loading and prevents the load from shifting. .

(v) Continuous operation is also possible, making it easy to load and unload powder and granular materials.

(vi) Therefore, according to the automatic control device of the present invention, cargo handling work can be carried out efficiently regardless of the type of cargo, so that work efficiency can be improved.

It has the following effects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the relationship between the automatic control device and the drive device for the bed floor according to the present invention, Fig. 2 is a side view of the vehicle body showing the mounting position of the limit switch and the operating section, and Fig. 3 is the limit switch and drive. An enlarged side view of the main parts of the vehicle body showing the relationship with the beam, FIG. 4 is an enlarged front view of the operating section, and FIG. 5 is a circuit diagram of the operating section.
FIG. 6 is a circuit diagram of the drive device, and FIGS. 7A to 7C are perspective views showing the operating state of the flooring. a is a loading platform floor, 1 is a floor material, 1a to 1c is a group of floor materials, 3a to 3c are drive beams, 6a to 6c are drive members, 7a to 7c are cylinders, 10 is a limit switch, b is a drive device, and c is a Operation section.

Claims (1)

[Scope of utility model registration request] A large number of flooring materials are arranged in parallel and slidable in the front-back direction, and each of these flooring materials is arranged in the left-right direction on the lower surface of the flooring material and is made slidable in the front-back direction. A group is formed by fixing to at least three or more drive beams in a circular manner via connecting members, and each of the drive beams is connected to the same number of drive members slidably disposed on the lower surface of the drive beam in the front-rear direction. Each drive member is fixed, and one end of each driving member is connected to the same number of cylinders arranged on the lower surface of the flooring material, and by driving each cylinder appropriately, the flooring material is moved in groups or as a whole. In a reciprocating conveyor-type vehicle cargo bed floor in which cargo is loaded and unloaded by moving forward or backward at the same time, on the vehicle body side located near the rear or near the front of the sliding range of the drive beam. , a limit switch that contacts the drive beam is provided, and an operating section that is connected to the limit switch and the drive device of the cylinder and controls the operation of the flooring material is provided at an appropriate position on the vehicle body. An automatic control device for a reciprocating conveyor-type loading platform.