JPH012938A - Loading platform position regulation method and device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a loading platform position regulating method and apparatus for regulating the loading platform position of a truck or the like and unloading cargo from the loading platform.

[Conventional technology]

Conventional techniques related to loading platform position regulation methods and devices applied to unloading methods from loading platforms such as trunks include:
Special Publication No. 52-14509, Utility Model Publication No. 61-1399
The one described in Publication No. 32 is known.

To explain the conventional technology described in the above-mentioned gazette, Japanese Patent Publication No. 14509/1983 discloses that a trunk is attached to the body of a truck via a guide member and a support arm provided on the supporting legs of an unloading conveyor. A cargo unloading device is described which is equipped with a leveling device consisting of a guide roller that is inserted into a guide member when landing at the unloading location.

Further, in Japanese Utility Model Application Publication No. 61-139932, an auxiliary bumper is fixed on the truck side, a stopper that can come into contact with the auxiliary bumper on the ground side, and a plurality of stoppers provided on the contact surface of the stopper. A truck bed fixing device is described that includes a proximity switch and a fixing member that is movable up and down.

[Problem that the invention seeks to solve]

However, the prior art described in - has the following problems.

That is, the rail alignment device described in Japanese Patent Publication No. 51-14509, while unloading a load from the bed of a truck,
Although it is possible to match the height of the loading platform and the unloading conveyor to a certain degree, it is not possible to match the height of the loading platform of various trucks and trucks with different loading platform heights of 1 nJ, and it is not possible to match the height of the loading platform to a certain level. When a truck with a large height lands on the floor at an unloading location, the height of the loading platform, which is slightly raised or lowered depending on the loaded state, can only be made to match the height of the unloading conveyor.

Furthermore, the truck bed fixing device described in Japanese Utility Model Application No. 61-139932 can fix the truck bed to prevent it from lowering, but if the truck bed rises due to unloading, could not be fixed.

Therefore, the object of the present invention is to
Our objective is to provide a method and device for regulating the position of a loading platform that can be controlled at a constant height during unloading.

Means for Solving Problem c] The present invention achieves the above object by moving the position of the loading platform above its empty height using a vertically movable loading platform support when unloading from the loading platform of a truck or the like. This has been achieved by providing a method for regulating the position of a loading platform.

Further, the present invention provides a loading platform position regulating device for regulating the position of a loading platform such as a trunk as a device suitable for implementing the loading platform position regulating method, which includes at least two loading platform support parts that can be moved up and down, and The present invention provides a platform position regulating device characterized in that a platform support section is moved up and down by a hydraulic cylinder operated via a tuning pulp.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an example of an unloading device using the loading platform position regulating method and device of the present invention shown in the drawings will be described below.

FIG. 1 and FIG. 2 are a plan view and a front view, respectively, schematically showing an embodiment of an unloading device in which the loading platform position regulating method and device of the present invention are utilized. In the above drawing, 1 is an unloading device, 2 is a loading platform for a truck, and 3,3° is a pair of storage conveyors for a warehouse It (not shown).

WO is the inner dimension (width) of the loading platform 2, which is shown in FIG. 1 at the position where the truck has landed exactly in the center of the perspective center. Further, A and A' are the maximum permissible ranges of the horizontal deviation of the loading platform 2 due to the horizontal landing deviation in the forward direction of the truck toward the hearth center. Also, 4a, 4
'a' indicates the load such as two rows of valets on the loading platform 2 when the truck has landed on the far left side of the perspective center in the forward direction, 4b, 4'b conversely indicates the truck is at the farthest left side of the perspective center in the forward direction. There are two rows of loads on the loading platform 2 when the load is landed on the rightmost side, and W is among these loads. In addition, in this specification and drawings, in principle,
Identical parts or parts are designated by the same reference numerals, and those on the right side with respect to the unloading direction (opposite to the forward direction of the truck) are marked with ``da'' and ``nyu'', and those on the left side with respect to the unloading direction are designated with ``danno''. shall not be attached.

The above-mentioned unloading device l has a swinging device ("swinging" means an operation in which the lh end moves up and down with one end as a fulcrum) 5.5' and a pair of unloading conveyors. The main body is equipped with a receiving conveyor 6.6" and a pair of receiving conveyors 7.7", and the unloading conveyor 6.6" 144a, 4'a or 4b placed in two rows on the loading platform 2
, 4° b, respectively, a pair of receiving conveyors 7.7°
After taking the receiver as it is, unload it with a pair of unloading conveyors 6.6゛ so as to form a gap between the rows of core parts 43, 4°a or between the rows of 4b, 4°b. There is no way to take them out to the warehousing conveyor 3 and 3 degrees respectively.

The unloading device 1 will be described in more detail with reference to FIGS. 3 to 7 showing its details.
are each mainly composed of a swinging frame 51.5F, and the 3.3° side of the storage conveyor of the swinging frame 51.51'' is rotatably supported by a support portion 52.52'. , the loading platform 2 side is connected to the vertical drive unit 53.53.
There is no vertical movement depending on the angle. Vertical drive section 5
3.53' is a crank type in this embodiment, but it may be an eccentric cam type or a hydraulic cylinder type. Reference numeral 11.11 denotes two detectors arranged above and below, which are mounted on the loading platform 2 side of the swing frame 51 at a certain distance below the loading surface of the loading conveyor at 7°7°. .

In addition, the vertical drive units 53 and 53' move the load on the loading platform 2.
A reflector plate 21 is provided at the rear of the trunk so as to correspond to the detector 11.11 from the lower surface, and is located a certain distance below the trunk so as to be detachable from the rear of the trunk, and can be projected by both the detectors 311. The loading surface of the loading platform 2 and the loading surface of the unloading device 1 on the loading platform 2 side are made to coincide with each other. In order to ensure that the reflection plate 21 is detected by the upper and lower detectors 11.11 regardless of the difference in the landing positions on the left and right sides of the trunk, the upper and lower detectors 11.11 must be moved in the direction of loading the cargo. It is preferable that a plurality of reflective plates 21 are arranged in parallel at right angles to each other, and that the width of the reflective plate 21 is wide.

In addition, the unloading equipment: R1 above-Ta I cargo receiving conveyor 7
．． 7゛ is the swing frame 51゜51' of the above-mentioned swing device.
The chain conveyor is placed and fixed on the loading platform 2 side, and each chain conveyor has two endless chains 71, 71°, etc. arranged on each side.

The receiving conveyor 7 on the left side in the direction of carrying out the cargo carries at least three endless chains of the cargo on the left side of the loading platform 2 in the direction of carrying out the cargo, regardless of the manner in which the truck lands on the perth station. 1.71.71,
The other receiving conveyor 7' is similarly formed. Also, 72.72' is the drive section of the grape receiving conveyor 7.7', 73°73.73 and 73', 73°, 7
3° is a roller placed at the tip of each loading platform 2 side, and these 73, 73, 73
, 73', 73', and 73' are each configured to be rotatable only in the unloading direction, and when unloading the rearmost load of the loading platform 2, that is, when unloading starts, the receiving conveyor 7 In the stopped state of .7゛, the driver (a member of the unloading crew) stands on the receiving conveyor 7゛7゛ and safely and easily unloads the loads 73, 73, 73, 73', 73°,
73" so that it can be pulled out. Also, the roller 73
, 73.73 and 73'', 73', 73' are connected to the receiving conveyor 7.7 by activation of the receiving conveyor 7.7''.
A ratchet is incorporated inside to interlock with 7'. The receiving conveyors 7, 7' may be constructed with roller conveyors, but by constructing them with chain conveyors, a deck plate can be provided between the endless chains so that workers can walk on them. There is also the advantage of making holes in the deck plate and attaching various control detectors.

Further, the pair of unloading conveyors 6, 6 of the unloading device l
`` is installed and fixed on a swinging frame 51.51' on the warehousing conveyor 3°3° side of the swinging device 5.5', which is connected to the receiving conveyor 7.7°, and a roller ( below,
(referred to as oblique roller) 62°62,... and 62°,6
2', . . . are arranged diagonally, respectively, to a pair of roller controllers.

These oblique rollers 62, 62. ...and 62', 6
2' are disposed obliquely so as to move the load diagonally outward with respect to the carrying-out direction, and are driven by oblique roller drive units 63, 63°. Then, the roller conveyor section 61 on the left side in the carrying-out direction
oblique rollers 62, 62. ... and the diagonal rollers 62'', 62'', ... of the right roller conveyor section 61', regardless of the landing deviation of the truck, the loading platform 2
The loads 4a and 4b on the left side in the carry-out direction above are continuously unloaded on the left roller conveyor section 61, and the loads 41a and 41b on the right side in the carry-out direction on the loading platform 2 are continuously unloaded on the right roller conveyor section 61°. The width of the load W is z~2 so that the load can be unloaded. If this inner end interval is less than 5, the grapes 4 to be unloaded on the left roller conveyor section 61
If the load 4'a is partially on the right roller conveyor section 6'' and is not unloaded at the specified position, or if the load 4'b that should be unloaded by the right roller conveyor section 61' is unloaded on the left roller conveyor section 61, If the inner end gap exceeds 72, the load 4a that should not be unloaded on the left roller conveyor section 61 may be moved to the left side depending on the deviation of the left and right beds of the truck. The roller conveyor part 1 makes it difficult to support kI,
The load 4°b to be carried out in the loading field I at the right loaf m: 1 hair r; ++6+° cannot be carried out because it cannot be supported by the ``J-rako 7'' hair part 61' of U'l. In addition, casters 64, 64. . . facing 17 in the σ direction are provided between the inner ends, and the front is r'1 row [J-ra 62.62. . . . or 62"762', . . . There are no casters 64, 64, . . . for support.The casters 64, 6, 1, . There are diagonal rollers 62, 62 on both sides of the
．． ... and 62', 62'+ ..., a pair of guys 1, each equipped with a number of guide rollers, are used to guide the cargo moving outward toward the incoming conveyor 3, 3°.
"65.65" is set. Inside this guide 65゜65゛ is ＼'10+2A or more, and the receiving conveyor is 3.3"
The center pitch width of the guide is 65゜65゛ 11
It is smaller than J(~Vo+2A) by the width of the load (W). (i.e. Wo-)2A-W). The height of the roller conveyor section 61, 61° to the warehousing conveyor is 3.3", for example, is equal to the height of the warehousing conveyor 3, 3".
．． 66, . . . and 6 et al., 66'', . . . are normal rollers provided at the tip of the loading platform 2111 of the roller conveyor section 61, 61', respectively.

Additionally, in the drawings, 8,8 is a workbench.

Furthermore, in FIGS. 1 and 2, 100 is a loading platform longitudinal position regulating device (truck stopper) that stops the truck (landing) just before the unloading device 1 and regulates the longitudinal position of the loading platform 2. Yes, 200 is cargo 4a from the trunk,
A loading platform vertical position regulating device (loading platform fixing device) as a loading platform position regulating device of the present invention which regulates the vertical position of the loading platform 2 of the truck so as to prevent the loading platform 2 of the truck from going up and down by unloading the 4°a etc. ).

Next, the platform vertical position regulating device 2-200, which is an embodiment of the platform position regulating device of the present invention, will be described in detail with reference to FIGS. 8 to 11.

As shown in FIGS. 1 and 2, the above-mentioned loading platform 1 position regulating device 200 is installed at a position 111j directly on the truck landing hearth side of the unloading device 1.

The V control device 200 is installed at the bottom of a pit-shaped storage section 201 formed on the floor just before the truck landing hearth (μm) of the unloading device r. The support frames 202 are fixedly installed at intervals of 18 mm, and the bearings 203 fixed to the upper part of the dirt support frames 202 are rotated.
The J-axis 204 is rotatably supported, and a pair of hydraulic cylinders (loading platform position regulating parts) 205 are provided at both ends of the J-axis 204.
It is formed by attaching and fixing. - "The foot rigid hydraulic cylinder 205 has its cylinder mounting part 20
6 is fixed by tightening it to the L rotation shaft 204 with a fixed pole +-207. A loading platform support portion 208 is provided at the upper end of the piston rod of the hydraulic cylinder 205, and a loading platform detection bracket 209 is also provided. The loading platform detection bracket 209 is pushed upward by the spring 210 and lowered by the loading force exerted by the auxiliary bumper 2A of the trunk, and its lower end flange 209A allows the loading platform detection bracket 209 to detect A limit switch 211 can be operated. In addition, in the figure, 212 and 213 are hydraulic hoses.

In addition, in the loading platform vertical position regulating device 200, the lower limit detection bracket 214 provided on the upper piston rod h portion of the hydraulic cylinder 205 is connected to the lower limit I★ output device (limit switch) 21 provided on the main body of the hydraulic cylinder 205.
5, the lowering state of the hydraulic cylinder 205 can also be detected.

Further, in the loading platform vertical position regulating device 200, a motor (drive unit) 216 with a brake and reduction gear is fixedly installed on one support frame 202, and a drive sprocket 217 fixed to the output shaft of the motor 216 and a rotation axis 204
A chain 219 is wound around a driven sprocket 218 fixed to one end of the chain.

As a result, the loading platform vertical position regulating device 200 moves the hydraulic cylinder 205 to the rotating shaft 2 by driving the motor 216.
With the rotation of 04, it can be changed from the upright state to the water state. part, the hydraulic cylinder 205,
It is possible to select and set either the working state for position regulation shown in solid lines in FIGS. The setting of the hydraulic cylinder 205 to the operating state is carried out when the upright detection bracket 220 fixed to the rotation shaft 204 is connected to the support frame 20.
Upright detector (limit switch) fixed to 2
21, and the detection result can be displayed by lighting a landing ready lamp (not shown). Furthermore, when the hydraulic cylinder 205 is stored in the storage section 201, the fall detection bracket 222 fixed to the rotation shaft 204 is connected to the support frame 202.
Fall detector (Rimi・2 tosui, chi) fixed to 2
23.

Next, an embodiment of the loading platform position regulating method of the present invention will be described in detail using an example in which the loading platform vertical position regulating device described above is used. That is, when unloading from the loading platform 2 of a truck equipped with a lift-low conveyor by using the above-mentioned unloading device 1, the loading platform vertical position regulating device 200 controls the hydraulic cylinder 20.
5 is set in the working state (with the trunk turned on) as shown by the solid lines in FIGS. 8 to 10. On the other hand, when unloading using a forklift, the hydraulic cylinder 205 is
Storage state (fork mode) as shown by the two-dot chain line in the figure
Set to .

Therefore, according to this loading platform vertical position regulating device 200, in the trunk mode, a truck that can be unloaded from the rear and has an auxiliary bumper 2A attached thereto can be brought into contact with the loading platform rear position regulating device 100 and landed on the floor. After that, by pressing the raising operation button (U in the figure), it becomes possible to raise the platform support part 208 of the hydraulic cylinder 205. When raising the loading platform support part 208 to regulate the position of the loading platform 2, move the loading platform detection bracket 209, which is preloaded with a spring 210, to the auxiliary bumper 2A.
After detecting and confirming the push-up starting point by activating the detector 211 at the brim 209A, the lift is further stopped at a position 20 to 3001- higher than that position (load platform fixation is completed). In the real image, the cargo platform level of the trunk is lowered, but if the cargo platform 2 is not fixed, the cargo platform 2 will rise as the cargo is unloaded, and the cargo platform level will become higher. In this embodiment, the above-mentioned disadvantage is solved by fixing the level of the loading platform 2 at a high position in advance. Therefore, in the above-mentioned unloading device Wl, it is possible to stably perform the unloading operation without considering the vertical movement of the loading platform 2. After unloading is completed using the unloading device Zl, the loading platform support section 208 can be lowered by pressing a lowering operation button (not shown). Lower limit detector 21
5, the lowering of the platform support section 208 can be stopped. In this way, the loading platform support section 208
After the push-up condition is released, the truck can start.

Furthermore, in the loading platform vertical position regulating device 200, in the fork mode, the hydraulic cylinder 205 can be overturned by pressing an overturning button (not shown). In this case, this hydraulic cylinder 205 is connected to the lower limit detector 21
5 is preferably absent so that the overturning operation is possible only when the piston rod is detecting the retracted state.

This overturning of the hydraulic cylinder 205 is performed by rotating the motor 216 1lr and rotating the l driving shaft 204, and the driving force at this time is transmitted from the driving sprocket 217 to the driven sprocket 218 via the chain 219. Ru. Then, when the fall detector 223 detects the row detection bracket 222, the operation of the motors 2+6 is stopped (fall is completed).The hydraulic cylinder 205 is stored in the housing part 201 in a completely fallen state. If the -L section of the storage section 201 is covered, a forklift can also enter the upper area of the storage section 201.In this way, the occupancy state of the loading platform vertical position regulating device 200 with respect to the landing perspective of the trunk is determined. Since it can be released, it becomes possible to create a wide running space for the forklift.

In addition, in the loading bed vertical regulation device 200, when the hydraulic cylinder 205 is in an upright state, the auxiliary bumper 2 of the truck
When supporting A, Rm transmitted via the hydraulic cylinder 205 is received by the rotating shaft 204 and the bearing 203, so a large load can be supported with a simple structure.

Further, at this time, since the hydraulic cylinder 205 is in an upright state, the chain 219 used to change the deafness of the hydraulic cylinder 2050 has almost no load.
I don't understand. Therefore, the motor 216 and the drive unit.

Rocket 217, driven sprocket 218, chain 2
19 need only have enough output and strength to overturn or upright the hydraulic cylinder 205, and as a result, the loading platform vertical position regulating device Z200 itself can be made small in size and capacity.

Further, the hydraulic cylinder 205 is configured such that the loading platform support portion 2.8 is raised via a control circuit as shown in FIG. That is, 301 is a solenoid valve;
02 is a throttle check modular valve, 303 is a reciprocating tuning valve (deco valve) that synchronizes both forward and return strokes, and 304 is a pilot operated check valve. ”
1. Since the pair of hydraulic cylinders 205 and 205 are configured to move up and down in synchronization by the reciprocating synchronization valve 303, even if the truck bed 2 is tilted in the left-right direction due to the loaded load, , the loading platform 2 can be straightened horizontally.

That is, according to the loading platform vertical position regulating device 200 of the present invention,
When unloading from the loading platform 2 of a truck, the loading platform support portion 20B, which is provided on the hydraulic cylinder 205 and is movable up and down, regulates the position of the loading platform 2 at least above its empty height. It can be done easily. At that time, even if the amount of cargo is taken into account, the height of the loading platform in the loaded state, that is, the height of the loading platform before starting unloading, is 20
By regulating the position at a height of ~300 tmilfL, it is possible to regulate the position of the loading platform of a Tsuho truck or the like above the height when unloaded.Moreover, the loading platform vertical position regulating device 200 of the present invention can Since the hydraulic cylinder 205 is not moved up and down via the hydraulic cylinder 303, the loading platform 2 can be horizontally corrected and its position can be regulated so that the loading platform 2 will not move up and down during unloading.

When unloading using the cargo platform vertical position regulating device 200 configured as described above, as long as the trunk lands within the error range from the center of the perspective station to the left and right, the driver (worker) All that is required is for a person (a staff member) to push the load out of the loading platform 2.

The pushed out cargo is continuously carried out to the warehousing conveyor 3, 3° while its position is adjusted by the unloading device 1.

That is, the loading part of the loading platform 2 pushed up by the loading platform support part 208 and the loading area of the loading platform 2 of the loading unloading device 1 (the loading area of the loading platform 2) are attached to the rear of the trunk as described above. The reflecting plate 21 is detected by the detector 11.11 and the rocking device 5,
By swinging the swinging frames 51 and 51', the positions of ) and racks are controlled so that they match, and the landing position of the truck is within the above error range. If there is, the receiving conveyor of the unloading device 7.
Since 7° faces the left and right loads of loading platform 2, the truck,
Unloading the cargo from the loading platform 2 to the unloading device 1 can be easily carried out by a worker simply pushing the cargo out.

And the pushed out load 4a, 4''a or 4b.

4'b is conveyed as it is by the receiving conveyor 7.7'' to the unloading conveyor 6.6°, but the unloading conveyor 6.6° is provided with the diagonal roller 62.
62. ... and 62°, 62° are arranged, and casters 64, 64 .・
Is it because... is installed? Tj4a or 4b is
On the previous run to reach the left warehousing conveyor 3, the left roller conveyor section 61 reliably presses against the left guide 65 and adjusts its direction while being delivered to the left warehousing conveyor 3. 41 a or 4
°b is similarly separated from the load 4a or 4b, and in the front run reaching the right-hand receiving conveyor 3'',
It is reliably pressed against the right guide 65° by the right roller conveyor section 61' and transported to the right warehousing conveyor 3° while its direction is adjusted.

The embodiments of the loading platform position regulating device of the present invention and the embodiments of the loading platform position regulating method of the present invention have been described above, but the present invention is not limited thereto. For example, the amount by which the loading platform is pushed up is selected appropriately depending on the size of the truck, etc., and for a large truck (11 tons), it is 30 to 20.
0 dragon is preferable, and 40 to 150 dragon is more preferable. The amount of lift mentioned above is within the range where the wheels of a normal truck are in contact with the ground even if the platform is pushed up to a higher position than the platform when it is empty.

Further, the number of hydraulic cylinders may be three, and the tuning valve may be a one-way (only when pushing up) a tuning valve.

Furthermore, in the loading platform position regulating method, the loading platform support portion may be pushed up using other pushing up means such as a screw jack.

In addition, the loading platform position regulating device of the present invention can be effectively used not only when unloading as described above, but also when loading.
Available for

〔Effect of the invention〕

According to the present invention, regardless of the type of cargo platform, a cargo platform such as a trunk can be regulated to a constant height during unloading, and as a result, the efficiency of unloading from the cargo platform can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing an unloading device used in an unloading method according to an embodiment of the present invention, FIG. 2 is a schematic front view thereof, and FIGS. Figure 6 shows
A plan view, a front view, a left side view, and a right side view of the main parts thereof, and FIG. 7 is an enlarged partial front view of the above-mentioned cargo receiving conveyor. 8 is a schematic plan view showing a loading platform vertical position regulating device according to an embodiment of the present invention, FIG. 9 is a schematic side view thereof, FIG. 10 is a schematic front view thereof, and FIG. 11 is a control circuit diagram thereof. It is. 2... Loading platform, 200... Loading platform vertical position regulating device 205... Hydraulic cylinder 208... Loading platform support section 303... Reciprocating synchronization valve. Patent Applicant Kao Co., Ltd. No. 10, Figure 11 Procedure Amendment Table (Method) November 1-1, 1985 1, Indication of the case Patent Application No. 153817/1982 2, Name of the invention, Number of units location regulation Method and device 3, relationship with the person making the amendment Patent applicant (091) Kao Co., Ltd. 4゜ Agent No. 601 Nogizaka, 9-6-29 Akasaka, Minato-ku, Tokyo, Japan Voluntary amendment (from the application office) (Amendment within 1 year and 3 months) 6. Application subject to amendment 7. Contents of amendment (1) Add "(Patent application pursuant to the proviso to Article 38 of the Patent Act)" above the date of submission of the application . (2) Added "2. Number of inventions stated in the claims...2" under the title of the invention column. +31 r 2, inventor” was corrected to “30 inventor.” +41 r 3, "Patent applicant" changed to "4. Patent applicant"
and correction. (Amended 51 “4., agent” to “51 agent.”

Claims (3)

[Claims] (1) When unloading from the loading platform of a truck or the like, a loading platform position regulating method is characterized in that the position of the loading platform is restricted to be above its empty height by a vertically movable loading platform support. (2) The loading platform position regulating method according to claim (1), wherein the loading platform position is regulated in a state where the loading platform is raised by 20 to 300 mm from the height before starting unloading. (3) A loading platform position regulating device that regulates the position of the loading platform of a truck, etc. has at least two loading platform supports that can be moved up and down, and the loading platform supporting sections are moved up and down by hydraulic cylinders operated via synchronization valves. A loading platform position regulating device that is characterized by being movable.