JP2006117371A - Support structure of rail floor in reciprocating conveyor type moving bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce weight of a moving bed, and to reduce its bulk height, while largely reducing its cost by reducing assembling manhours and the number of part items of a reciprocating conveyor type moving bed. <P>SOLUTION: A plurality of bearings 40 are directly-immovably arranged on a plurality of horizontal floor joists 4j of a floor frame 4. A plurality of rail floors 10 for constituting the reciprocating conveyor type moving bed F, are respectively slidably supported on these bearings 40. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rail floor support structure in a reciprocating conveyor type moving floor.

Conventionally, a large number of elongated rail floors are arranged in parallel on the floor frame so as to be movable back and forth on one plane, and when three adjacent rail floors are combined into one unit, Move the rail floor to one side at the same time to move the load by one stroke, move the three rail floors to the other one by one in the next stroke (the load does not move), and then move the three rail floors again at the same time There is already known a reciprocating conveyor type moving floor that moves to one side and moves the load by one stroke and loads and unloads loads on a plurality of rail floors (see Patent Document 1).
Japanese Utility Model Publication No. 3-57553

  By the way, in general, in such a reciprocating conveyor type moving floor, as shown in FIG. 15, a plurality of sub decks are arranged on the horizontal joists of the floor frame of the packing box in the direction crossing this (the front and rear direction of the floor frame). (Guide member) is fixed with a tapping screw, a plurality of bearings are fitted on the sub decks, and a plurality of rail floors are slidably supported on the bearings.

  However, in such a conventional reciprocating conveyor type moving floor, a plurality of sub-decks are fixed to the side joists, which not only increases the number of parts of the moving floor, but also increases the number of assembly steps and causes a significant increase in cost. In addition, there is a problem that the weight of the entire cargo box increases due to an increase in the weight of the moving floor.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a rail floor support structure in a new reciprocating conveyor type moving floor which enables the omission of a sub deck and solves the above-mentioned problem. To do.

In order to achieve the above object, according to the first aspect of the present invention, a plurality of elongated rail floors are arranged in parallel on a floor frame so as to be movable back and forth on a single plane, and at least three adjacent rail floors are combined. When loading and unloading loads on the rail floors, move the rail floors to one side at the same time to move the loads to one side by one stroke, and at least three rail floors to the next stroke. Slide the bottom of each piece to the other, then move at least three rail floors to one side at a time and move the load on the rail by one stroke. In the reciprocating conveyor type moving floor
A plurality of bearings are provided on the plurality of horizontal joists of the floor frame so as not to move directly, and the plurality of rail floors are slidably supported on the bearings, respectively.

  In order to achieve the above object, the invention described in claim 2 is the one described in claim 1, wherein the bearing is made of a hard synthetic resin, and is directly connected to the horizontal joist without using a fixture. It is characterized by being stopped.

  Furthermore, in order to achieve the above object, the invention according to claim 3 is the one according to claim 1 or 2, wherein the rail floor is made of an aluminum alloy, and the plurality of bearings are made of the hard synthetic resin. Is characterized by being slidable without lubrication.

  According to the first aspect of the present invention, the plurality of bearings are provided on the plurality of horizontal joists of the floor frame so as not to move directly, and the plurality of rail floors are slidably supported on the bearings. As a result, the conventional sub-deck is no longer required, and it is possible to achieve a significant cost reduction of the moving floor by reducing the number of assembly steps and the number of parts, and also reduce the weight of the moving floor. Can do.

  Further, according to the present invention, the work of assembling the hard synthetic resin bearing to the horizontal joist becomes easier.

  Furthermore, according to the third aspect of the present invention, since the rail floor is always ensured to be smoothly slid and does not need to be refueled, non-maintenance can be achieved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on examples of the present invention illustrated in the accompanying drawings.

  An embodiment of the present invention will be described below with reference to FIGS. 1 to 14. FIG. 1 is a side view of a cargo handling vehicle equipped with a reciprocating conveyor type moving bed driving device according to the present invention. Is a perspective view of the cargo handling vehicle, FIG. 3 is a plan view taken along the arrow 3 in FIG. 2, FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. 3, and FIG. FIG. 6 is a perspective view of the drive device as viewed in the direction of arrow 6 in FIG. 4, FIG. 7 is an enlarged cross-sectional view taken along line 7-7 in FIG. 4, and FIG. 8 is 8-8 in FIG. 9 is a rear view of the driving device along the line, FIG. 9 is a diagram showing a procedure for exchanging parts of the driving device, FIGS. 10 and 11 are hydraulic circuit diagrams showing the operation of the hydraulic device, and FIG. FIG. 13 is an enlarged sectional view taken along line 13-13 in FIG. 12, and FIG. 14 is a sectional view taken along line 14-14 in FIG.

  1 and 2, a cargo box V is mounted on a chassis frame S of a cargo handling vehicle, and an entrance 2 that is opened and closed by a rear door 1 is opened on the rear surface of the cargo box V. On the bottom surface of the packing box V, the reciprocating conveyor type moving floor F according to the present invention is provided over the entire area. Done.

  3 to 5, the floor frame 4 of the packing box V is fixed via a plurality of brackets 5 on the main frame 3 integrated with the chassis frame S. This floor frame 4 is formed in a rectangular shape with left and right vertical frames 4l and 4l and front and rear horizontal frames 4t and 4t, and a plurality of horizontal joists 4j are horizontally fixed between the left and right vertical frames 4l and 4l. Is done. The plurality of horizontal joists 4j are arranged in parallel with a space therebetween, and the upper surfaces thereof are coplanar. The horizontal joists 4j, the upper surfaces are spaced in the longitudinal direction (lateral direction). A large number of hard synthetic resin bearings 40 (to be described in detail later) are integrally fitted. As shown in FIG. 3, a large number of bearings 40 are arranged in a row in the front-rear direction of the floor frame 4 and in a row in the horizontal direction, and a plurality (24) A strip-like long rail floor 10 made of an aluminum alloy (detailed later) is engaged so as to be slidable in the longitudinal direction. The plurality of rail floors 10... Are arranged in parallel so as not to have a gap therebetween and constitute a conveyor type moving floor F.

  As shown in FIGS. 3 and 4, a plurality of front and rear guide blocks 6, 7... Are fixed to the front and rear horizontal frames 4 t and 4 t of the floor frame 4, respectively. These front and rear end edges are fitted to these front and rear guide blocks 6.

As shown in FIG. 5, the plurality (24) of rail floors 10... Are arbitrarily adjacent to three, that is, the first, second and third rail floors 10 (1), 10 (2) and 10. (3) constitutes one rail unit 10LU, and the conveyor type moving floor F is composed of a plurality of sets (eight sets) of rail units 10LU. The first rail floors 10 (1), the second rail floors 10 (2), and the third rail floors 10 (3), one in each group, are each in the first group G (1). , The second group G (2) and the third group G (3), and the rail floors 10 of the first, second and third groups are respectively first, second and third. The driving device D described below through the cross drives 12 ₁ , 12 ₂ , 12 ₃ is always tuned.

As shown in FIG. 3, the first, second, and third cross drives 12 ₁ , 12 ₂ , 12 ₃ are parallel to each other and extend in a direction crossing the moving floor F, and the first cross drive 12 ₁ The rail floor 10 of the first group G (1) (the first rail floor 10 (1) group) is connected to the second cross drive 12 ₂ through a plurality of mounting pieces 13 integrated therewith. The rail floor 10 of the second group G (2) (second rail floor 10 (2) group) is further connected to the third cross drive 12 ₃ via a plurality of mounting pieces 13 integrated therewith. Are fixed to the rail floors 10 (third rail floor 10 (3) group) of the third group G ₃ through a plurality of mounting pieces 13 integrated therewith.

Next, the reciprocating conveyor type moving bed driving apparatus according to the present invention for driving the rail floors 10 of the first, second and third groups G (1), G (2), G (3). The structure of D will be mainly described with reference to FIGS. 6 to 8. Under the moving floor F composed of the rail floor 10 group, the driving device D is disposed in the middle portion of the floor frame 4, The drive device D includes three drive cylinders, that is, first, second, and third hydraulic cylinders 16 ₁ , 16 ₂ , and 16 ₃ that are arranged in parallel along the front-rear direction of the moving floor F. . These hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are supported by a center frame CF attached to a lateral joist 4j described later.

As shown in FIGS. 6 and 7, the first, second and third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are all the same structure, and the cylinder tube 18 has a separate The cylinder bottom portions 19 ₁ , 19 ₂ , and 19 ₃ are fixed to each other, and the connection flanges 21 are fixed to the inner ends of the cylinder bottom portions 19 ₁ , 19 ₂ , and 19 ₃ , respectively. The part 20 is detachably attached with bolts and nuts 22. The cylinder head portion 20 is supported by a center frame CF attached to a lateral joist 4j described later. Pistons 24 are slidably fitted into the cylinder tubes 18 of the first, second and third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ , and coupled to these pistons 24. The cylinder rods 25 are extended to the outside through the common cylinder head portion 20, and the free ends of the cylinder rods 25 are a center frame CF attached to a horizontal joist 4j described later. It is slidably fitted and supported by a support member 26 fixed to the head. Intermediate portion of the first hydraulic cylinder 16 ₁ of the cylinder rod 25, the first cross drive 12 ₁ via a mounting piece 15 _1, an intermediate portion of the second hydraulic cylinder 16 ₂ of the cylinder rod 25 is attached piece the second cross drive 12 ₂ through 15 _2, and further the intermediate portion of the cylinder rod 25 of the third hydraulic cylinder 16 is fixed to the third cross drive 12 ₃ via an attachment piece 15 ₃ .

As shown in FIGS. 10 and 11, the first, second and third hydraulic cylinders 16 ₁ , 16 ₂ and 16 ₃ are connected to a hydraulic circuit CO having a control valve CV and a switching valve SV. By the switching control, the sequence operation or the tuning operation is sequentially performed. The switching valve SV is supported by an extension of the cylinder head portion 20, and the control valve CV is supported at an appropriate position on the floor frame 4.

Since the hydraulic circuit CO is conventionally known, its configuration will be briefly described with reference to FIGS. 10 and 11, and the first, second and third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ will be described. Is connected to a hydraulic pump P and an oil reservoir T via a hydraulic circuit CO, and a switching valve SV and a control valve CV are connected to the hydraulic circuit CO. The first hydraulic cylinder 16 _1, check valve check valve 30 which is opened by the forward limit of the piston 24, the _two second cylinder 16, which is opened by the forward limit and a piston retraction limit of the piston 24 31 and 32, and the third cylinder 16 ₃ is provided with a check valve 33 that is opened by the backward limit.

(1) Extension of the first hydraulic cylinder 16 _{1 As} shown in FIG. 10A, the pistons 24 of the first to third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are all in the backward limit. from, by actuating the hydraulic pump P, only _one first hydraulic cylinder 16 is extended (either by retraction limit of the check valve 32, 33 the piston 24 open).

(2) As shown in the second and third hydraulic cylinders 16 _2, 16 ₃ of the extension FIG. 10 (b), the first hydraulic cylinder 16 ₁ of the piston 24 reaches the forward limit, the check valve 30 is opened To do. Then, the oil passage of the first hydraulic cylinder 16 ₁ and the second hydraulic cylinder 16 ₂ of the head side is in the communicating state, the oil of the second hydraulic cylinder 16 ₂ of the rod chamber side can be returned to the oil reservoir T to become the second hydraulic cylinder 16 ₂ is extended by the action of the hydraulic fluid supplied to the first bottom side of the hydraulic cylinder 16 ₂ via the check valve 32 or 33. Next, when the second hydraulic cylinder 16 ₂ of the piston 24 reaches the forward limit, the check valve 31 is opened. Then, the oil path on the head side of the second hydraulic cylinder 16 ₂ and the third hydraulic cylinder 16 ₃ is in communication, and the oil on the rod chamber side of the _third hydraulic cylinder 16 ₃ can return to the oil reservoir T. Therefore, the third hydraulic cylinder 16 ₃ is extended by the action of pressure oil supplied to the bottom side of the third hydraulic cylinder 16 ₃ via the check valve 33 or the hydraulic hose h.

(3) Extension of the _first , _second , and third hydraulic cylinders 16 ₁ , 16 ₂ , 16 _{3 As} shown in FIG. 11 (c), the _first , _second , third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ Both reach the forward limit.

According to the above (1) to (3), the _first hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are connected to the first to _third hydraulic cylinders 16 ₁ , 12 ₂ , 12 ₃ via the first to _third cross drives 12 ₁ , 12 ₂ , 12 ₃ . The rail floors 10 of the third group G (1), G (2), G (3) are sequentially operated by one stroke, reach the same position and stop there.

(4) From the state of FIG. 11C, as shown in FIG. 11D, if the switching valve SV is switched to the lower side, the first to third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ The rail floors 10 ... of the first to third groups G (1), G (2), G (3) are simultaneously retracted, and the loads on them are moved rearward (discharge direction). Is moved by the amount of hydraulic cylinder contraction, that is, by one stroke. By repeating the operations (1) to (4) above, the package is discharged.

Further, if the switching valve SV is switched to the upper side and the control valve CV is switched to the lower side, the first to third hydraulic cylinders 16 ₁ , 16 ₂ , and 16 ₃ are simultaneously expanded, and the first to third groups G ( 1), G (2), G (3) rail floors can be advanced at the same time, and the cargo on them can be advanced forward (in the loading direction). If the switching valve SV is switched to the lower side from this state, the third to first hydraulic cylinders 16 ₃ , 16 ₂ , and 16 ₁ are sequentially contracted to form the third to first groups G (1). , G (2), G (3) rail floors 10 are sequentially retracted (the luggage does not move). If the switching valve SV is switched to the upper side again, the first to third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are simultaneously extended to advance the load forward. The baggage is loaded by repeating the above.

Further, if the switching valve SV is switched to the upper side and the control valve CV is switched to the intermediate (middle positive) position, the first to third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are fully contracted or stopped in the middle of their contraction. If the switching valve SV is switched to the lower side and the control valve CV is switched to the intermediate (middle positive) position, the first to third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are fully extended, or their Stop during expansion.

By the way, according to this embodiment, replacement of the consumable parts of the _first to third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ , for example, replacement work of the piston packing 23 of the piston 24 can be performed very easily. The operation process will be described below with reference to FIG.

(1) As shown in FIG. 9 (1), it is connected to the first to third hydraulic cylinders 16 _1, 16 _2, 16 each cylinder bottom portion 19 of the _third cylinder tube 18 _1, 19 _2, 19 ₃ Remove the two hydraulic hoses h of the hydraulic circuit CO.

  (2) As shown in FIG. 9 (2), the bolts and nuts 22 connecting the common cylinder head portion 20 and the cylinder tube 18 are removed and separated.

  (3) As shown in FIG. 9 (3), the cylinder tubes 18 are extracted from the piston rod 25 and the piston 24, and consumable parts such as the piston packing 23 are replaced.

The first to third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are assembled by reversing the procedures (1) to (3).

As described above, the cylinder tubes 18... Of the first to third hydraulic cylinders 16 ₁ , 16 ₂ , 16 ₃ are not connected to the common cylinder bottom portion. Even when the piston packing 23 is replaced, there is no need to remove all the cylinder tubes 18 from the common cylinder bottom, and the number of parts to be removed is reduced when exchanging consumable parts. This can be done in a short time. In addition, since the number of parts to be removed is small, the amount of oil leakage is reduced during parts replacement work, and the workability is greatly improved. In particular, as in this embodiment, when the driving device D is mounted under the moving floor F and the operator performs the above operation under the load box V, the workability is poor. In some cases, the effect is noticeable.

  Next, the reciprocating conveyor type moving floor F and its supporting structure will be described in detail in FIGS. 3 to 5 with reference to FIGS.

  The plurality of rail floors 10 constituting the moving floor F are supported on the horizontal joists 4j of the floor frame 4 via a plurality of bearings 40 so as to be slidable in the longitudinal direction. The multiple bearings 40 have the same structure, and are configured to be integrally fitted and supported on the lateral joists 4j without using a fixing tool. Each bearing 40 is made of a hard synthetic resin, and as shown in FIGS. 12 to 14, has a slide portion 40 </ b> S having a rectangular plate shape, and a fitting portion 40 </ b> E extending integrally with the lower surface thereof. A flat sliding surface 41 is formed on the upper surface of the sliding portion 40S so that the rail floor 10 can slide smoothly on the upper surface of the sliding portion 40S. A fitting groove 42 having a channel-shaped cross section is formed in the middle portion of the fitting portion 40E in the longitudinal direction. Further, the back surface of the bearing 40 is formed as a lattice-shaped uneven surface 43 over the entire region, and the material is saved and the weight is reduced without causing a decrease in strength.

  As shown in FIG. 12, a large number of bearings 40 are supported on the upper surface of the horizontal joists 4j of the floor frame 4 so as not to move at intervals over the entire length thereof. That is, the fitting groove 42 on the lower surface of each bearing 40 is elastically engaged with the upper surface of the horizontal joist 4j of the floor frame 4 so that it does not move in a delusion. Further, the slide groove 10G of the rail floor 10 is fitted to the slide part 40S of the bearing 40 so as to be slidable along the longitudinal direction so as to hold the slide part 40S.

  Each rail floor 10 constituting the movable floor F is formed in an elongated strip shape by an aluminum alloy, a slide groove 10G is formed on the lower surface thereof, and a receiving portion 10S is formed on the upper surface thereof. The slide groove 10G is slidably fitted to slide portions 40S of a plurality of bearings 40 arranged in a row, and the receiving portion 10S is formed in a concave shape in cross section, and a rising wall 10W is formed on one side edge thereof. The male male part 10M is projected from the other side edge. A flat cargo receiving surface is formed on the upper surface of the rising wall 10W, and an engaging female portion 10F is formed on the lower surface thereof.

  As shown in FIG. 12, one engaging female portion 10F of the rail floors 10 and 10 adjacent to each other and the other engaging male portion 10M are slidably engaged via a slider 9 made of synthetic resin. Combined. The engaging male portion 10M of the outermost rail floor 10 is slidably engaged with the engaging female portion 8F of the fixed rail 8 fixed to the floor frame 4 via the slider 9.

  Thus, the plurality of strip-like rail floors 10 arranged in parallel on one plane are connected so that their adjacent ones are slidable with respect to each other in the longitudinal direction, and each rail floor 10 is described above. As described above, each of the plurality of bearings 40... Directly fitted to the horizontal joists 4j of the floor frame 4 can be slid freely.

  As apparent from the above embodiment, a plurality of bearings 40 are engaged on the plurality of horizontal joists 4j of the floor frame 4 so as not to move directly, and a plurality of bearings 40 are disposed on the bearings 40. Since each of the rail floors 10 is slidably supported, the conventional sub-deck (see FIG. 15) becomes unnecessary, and the number of assembly steps and the number of parts of the movable floor F can be reduced.

  Also, the hard synthetic resin bearings 40 are simply engaged directly with the horizontal joists 4j, and the assembly work of the bearings 40 with the horizontal joists 4j is extremely easy without requiring any fixtures. Since each rail floor 10 is always guaranteed to slide smoothly and does not require refueling, non-maintenance can be achieved.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.

  For example, in the above embodiment, the rail unit is constituted by three rail floors, but the rail unit may be constituted by four or more rail floors.

The side view of the cargo handling vehicle provided with the drive device of the reciprocating conveyor type moving floor concerning this invention Perspective view of cargo handling vehicle 2 is a plan view taken along the arrow 3 in FIG. Sectional view along line 4-4 in FIG. Enlarged sectional view taken along line 5-5 in FIG. FIG. 4 is a perspective view of the driving device as viewed in the direction of arrow 6 in FIG. Enlarged sectional view taken along line 7-7 in FIG. Rear view of drive unit along line 8-8 in FIG. The figure which shows the procedure at the time of parts replacement of the drive unit Hydraulic circuit diagram showing the operation of the hydraulic system Hydraulic circuit diagram showing the operation of the hydraulic system Enlarged view of the imaginary line enclosure in FIG. FIG. 12 is an enlarged cross-sectional view taken along line 13-13 of FIG. 14 is a cross-sectional view taken along line 14-14 in FIG. Sectional view of a conventional reciprocating conveyor type moving floor

Explanation of symbols

4 ········································································································································ Floor frame
10 ························· Rail rail 10 (1), 10 (2), 10 (3) ... Rail floor (rail unit)
10LU ... Rail unit 40 ... Bearing

Claims (3)

On the floor frame (4), a large number of elongated rail floors (10) are arranged in parallel so as to be movable back and forth on one plane, and at least three adjacent rail floors (10 (1), 10 (2), 10 (3)) is one rail unit (10LU), and when loading / unloading loads on those rail floors (10 (1), 10 (2), 10 (3)), those rail floors ( 10 (1), 10 (2), 10 (3)) are simultaneously moved to one side to move the load to one side for one stroke, and at least three rail floors (10 (1), 10 (2) ), 10 (3)) slide one by one under the load one by one, then again move at least three rail floors (10 (1), 10 (2), 10 (3)) to one at the same time The load on the rail is moved by one stroke, and the load on the plurality of rail floors (10) is loaded and unloaded by repeating this operation. In the reciprocating conveyor type moving floor
A plurality of bearings (40) are provided not to move directly on the plurality of horizontal joists (4j) of the floor frame (4), and a plurality of rail floors (10) are provided on the bearings (40). A rail floor support structure in a reciprocating conveyor type moving floor, characterized in that each is slidably supported.   The reciprocating conveyor type movement according to claim 1, wherein the bearing (40) is made of a hard synthetic resin and is directly locked to the horizontal joist (4j) without using a fixture. Rail floor support structure on the floor. The rail rail (10) is made of an aluminum alloy, and is slidable without lubrication on the plurality of bearings (40) made of the hard synthetic resin. Support structure of rail floor in reciprocating conveyor type moving floor.

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