JP3366219B2 - Receiving platform for cargo handling equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading tray for a cargo handling device such as a tailgate lifter provided at the rear of a truck. 2. Description of the Related Art Conventionally, as a loading table of the above-mentioned cargo handling apparatus, Al
A weld-less structure in which a plurality of alloy hollow members are arranged in parallel on one plane and integrally joined by bolts and nuts is disclosed in, for example, JP-A-7-323778. It is known. [0003] In the above-mentioned conventional receiving platform, when a reinforcing support member is integrally attached to a loading platform body in which a plurality of hollow members are connected in parallel and connected to each other, the receiving platform and the reinforcing support are used. Since the members are large and relatively heavy even though they are made of light alloy, it is difficult to align the mounting holes on the reinforcement support side with the nuts on the loading tray main body, resulting in poor workability. There is a problem that the cost is increased. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and makes it possible to extremely easily and easily attach a reinforcing support member to a load receiving base main body formed by integrally connecting a plurality of light alloy forming blocks in parallel. Thus, it is an object of the present invention to provide a cargo receiving platform in a new cargo handling device which solves the above-mentioned problem. [0005] In order to achieve the above object, the present invention comprises a plurality of extruded molding blocks arranged in parallel on one plane and integrally connected. that the receiving platform body, the more the reinforcing support member to be fixed to the rear surface of the receiving platform body, receiving platform odor in the cargo apparatus
Te, on the back surface of the receiving platform body, along the parallel direction of the forming block, transverse to the opening through a slit in its lower surface
A plurality of slide grooves having a concave cross section are formed over the entire length thereof, a nut plate is slidably provided in the slide grooves, and mounting bolts inserted through the mounting holes of the reinforcing support member are passed through the slits so that the nut plate is formed. By screwing into the bolt holes, the reinforcing support member is fixed to the back surface of the receiving table main body, and the above-mentioned slide grooves and the corresponding
Slit is different from the connecting position of the molding blocks
Position and the respective slide grooves are formed
It is characterized in that it is formed simultaneously with the extrusion of the forming block , which facilitates the alignment of the mounting holes and the bolt holes, and makes it extremely easy to attach the reinforcing support member to the back surface of the loading tray body. Become. Embodiments of the present invention will be specifically described below based on embodiments of the present invention illustrated in the accompanying drawings. In this embodiment, the present invention is applied to a so-called tailgate lifter (rear lift device) mounted on the rear part of a lorry.
1 is a rear side view of a lorry equipped with a tailgate lifter equipped with the receiving stand of the present invention, FIG. 2 is a perspective view of a main part of a connecting portion between the receiving stand elevating mechanism and the receiving stand, and FIG. -3
Partial enlarged sectional view along the line, FIG. 4 is a side view of the receiving table, FIG.
Is a bottom view of the loading tray as viewed in the direction of the arrow 5 in FIG. 4, FIG. 6 is an enlarged partial sectional view along the line 6-6 in FIG. 5, and FIG. 8, FIG. 8 is an enlarged view of a portion viewed in the direction of arrow 8 in FIG. 5, FIG. 9 is a sectional view taken along line 9-9 in FIG. 8, FIG. 10 is a sectional view taken along line 10-10 in FIG.
1 is a sectional view taken along the line 11-11 in FIG. 6, and FIG. 12 is a view showing a connection position of the adjustment molding block. 1 to 3, a body B of a truck V has a vehicle body frame F and a cargo box 1 mounted on the vehicle body frame F and capable of storing goods. Is formed on the platform surface 1f for placing the. At the rear of the body B, there is provided a rear lifter TL called a tailgate lifter. Since the rear lifter TL has a conventionally known structure, the structure is briefly described below.
A pair of left and right elevating frames 2 are supported via a pair of left and right parallel link mechanisms L so as to be able to move up and down while maintaining a fixed posture. between the first hydraulic cylinder C ₁ is provided for vertically driving the elevator frame 2. Further, a rectangular plate-shaped receiving tray T which will be described in detail later is pivotally supported on each of the left and right lifting frames 2 so as to be able to rotate up and down, and between the loading tray T and the lifting frame 2 is provided. the second hydraulic cylinder C ₂ for forcibly rotating the receiving platform T in the vertical direction is interposed. Each of the parallel link mechanisms L for supporting the loading tray T with respect to the body B so as to be able to move up and down is supported by a bracket FB fixed to the rear portion of the vehicle body frame F, and pivotally supported by the bracket FB so as to be vertically swingable. A pair of upper and lower link arms 3 ₁ , 3 ₂
When, the link arms 3 _1, 3 and ₂ of the tip top and the bottom is more structure and lifting frame 2 is pivotally connected, respectively, the first between the lower link arm 3 ₂ and the vehicle body frame F the hydraulic cylinder C ₁ is interposed. Also in the elevator frame 2 at pivot coupling portion and coaxial with the upper link arm 3 ₁ lifting frame 2, receiving platform T is rotatably supported via a vertical rotatable pivot shaft 5 _1. Each lifting frame 2 has a pair of left and right side plates 2s, 2s.
When, the side plates 2s, is constituted by a cylindrical connecting pin 2p for integrally connecting the inter top of 2s, the pivot 5 ₁ penetrating the connecting pin 2p, the base frame of the receiving platform T 4 and the upper link arm 3 ₁ is rotatably supported, respectively,
On the other hand, both side plates 2s, is between the bottom of 2s, the distal end tube portion of the lower link arm 3 ₂ is rotatably supported via a pivot 5 _2. Although not shown, a control device is provided between the lifting frame 2 and the receiving table T for holding the receiving table T horizontally or for holding the receiving table T slightly downward. Next, the structure of the receiving table T will be described in detail with reference to FIGS. 4 to 11. The structure of the receiving table body Tb having a receiving surface on the upper surface and the reinforcement of the receiving table body Tb is described below. It is composed of a pair of reinforcing support members St fixed to the back surface. The receiving tray body Tb is formed in a square shape by sequentially and integrally connecting a plurality of forming blocks formed by extrusion of a light alloy material such as an aluminum alloy on one plane. In this embodiment, the front side is closer to the base side.
Bottom molding block 10, first middle molding block 1
1, adjustment molding block 12, second middle molding block 1
3. The third middle forming block 14 and the top forming block 15 are provided with a female connecting portion Cf and a male connecting portion C, which will be described in detail later.
are connected together by coupling with m. And for their connection, at the outer end of the bottom forming block 10,
One of the female and male connecting portions Cm is formed, and the first to third
Female and male connecting portions Cf and Cm are formed in pairs on both side ends of the middle forming blocks 11, 13, and 14 and the adjusting forming block 12, respectively. One of the portions Cf and Cm is formed. [0015] The bottom mold block 10, the front portion being formed into a plate shape having a hollow rectangular tube portion 10 _1, the right and left, the right and left base for mounting a pair of said elevator frame 2 The frame 4 is bolted 16. [0016] Prior edge or front edge of the hollow rectangular tube portion 10 ₁ of the bottom mold block 10, described later female connection portion Cf
(Male connecting portion Cm) is formed integrally. The first to third middle molding blocks 11,
Each of the members 13 and 14 has the same structure. Each of the members 13 and 14 has a flat and elongated rectangular cylindrical hollow main body 17 having a closed cross-sectional structure, and the upper surface of the hollow main body 17 is non-slip. And a plurality of reinforcing ribs 1 connecting the upper and lower inner surfaces thereof in the hollow interior.
9 are integrally formed. The first to third middle molded blocks 11, 13, and 14 have female connecting portions Cf at front and rear edges of the hollow main body portion 17, that is, both side edges in the width direction.
(Male connecting portion Cm) and male connecting portion Cm (female connecting portion Cf) are formed symmetrically. The adjustment molding block 12 is formed in the shape of a hollow square tube having a closed cross section, and is formed narrower than the first to third middle molding blocks 11, 13, and 14, and has an uneven surface on its upper surface. A surface 18 is formed, and a female connecting portion Cf (male connecting portion Cm) and a male connecting portion Cm are formed on both side edges in the width direction.
(Female connecting portion Cf). The adjustment molding block 12 is used to adjust the length of the load receiving table T itself in the front-rear direction (with respect to the truck V). The top forming block 15 is formed in a plate shape, and a tip portion thereof is formed in a tapered shape so as to facilitate loading / unloading of a load. A female connecting portion Cf (male connecting portion Cm) is formed on the side edge on the base side. Next, the structure of the female connecting portion Cf and the male connecting portion Cm respectively formed in the forming blocks 11 to 15 will be described by way of example with the outer edge of the bottom forming block 10 and the first middle forming block 11. First, referring to FIGS. 6 and 7, a description will be given of the connection with the side edge.
The female connecting portion Cf formed on one side edge of the middle molded block 11 projects substantially in parallel from the upper and lower sides of the edge of the hollow main body portion 17 so as to form the connecting concave portion 21. has upper and lower projecting portions 22 _1, 22 ₂ forming the, these projecting portions 22 _1, 22 ₂ of the outer surface, along with upper and lower locking portions 23 ₁ of the V-shaped cross section, 23 ₂ are formed A pair of connecting grooves 2 having a semicircular cross section are formed on the inner surfaces of the bases.
4 ₁ and 24 ₂ are formed. On the other hand, the male connecting portion Cm formed on the outer edge of the bottom forming block 10 has a connecting convex portion 26 having a U-shaped cross section to be fitted into the connecting concave portion 21. the upper and lower outer 26, engaging protrusion 27 ₁ a pair sandwiching the V-shaped grooves 29 _1, 29 _2, 27 ₂ are flared outwardly. On the outer sides of the front ends on both sides of the connecting projection 26, other connecting grooves 28 ₁ and 28 ₂ having a semicircular cross section corresponding to the semicircular connecting grooves 24 ₁ and 24 _{2 of the} female connecting portion Cf. It is formed in pairs. When the female and male connecting portions Cf and Cm are connected to each other, they are brought into contact with each other, as shown in FIG. 6, into the connecting concave portion 21 of the female connecting portion Cf and the connecting convex portion 26 of the male connecting portion Cm.
Are closely fitted. At this time, a pair of overhanging pieces 22 ₁ ,
22 ₂ is wedge-engaged with a pair of V-shaped grooves 29 ₁ and 29 ₂ , respectively, and a pair of semi-circular connecting grooves 24 ₁ and 2
4 ₂ 28 _1, 28 ₂ and is consistent pair of connecting holes 3
0 ₁ and 30 ₂ are formed, and their connection holes 30 ₁ and 30 ₂ are formed.
₂ , by inserting the connecting rod 31 from the outside of the bottom forming block 10 and the first middle forming block,
The female and male connecting portions Cf and Cm are connected, and the bottom molded block 10 and the first middle molded block 11 can be integrally connected. At the inner surface of the end wall of the male connecting portion Cm, mounting holes 33 are formed which are opened at the left and right ends thereof, and as shown clearly in FIG. A corner cover 34 having a U-shaped cross section is fitted by a self-tapping bolt 35. As described above, by connecting the female and male connecting portions Cf and Cm, the bottom molding block 10, the first middle molding block 11, the adjustment molding block 12, the second middle molding block 13, the third middle molding block 14, and The top molding blocks 15 can be sequentially connected integrally on one plane, thereby forming a rectangular split-type receiving tray body Tb.
Can be assembled. A pair of reinforcing support members St for reinforcing the main body Tb are provided on the right and left rear surfaces of the main body Tb.
Are fixed in a direction perpendicular to the direction in which the plurality of molding blocks 10 to 15 are arranged in parallel, that is, in the front-rear direction of the loading tray main body Tb. The structure of the fixing portion will be described below. The first, second, and third middle molded blocks 11, 13, 1
5 and 6, a slide groove 37 having a concave cross section is formed over the entire length in the longitudinal direction at the time of extruding them as shown in FIGS. This slide groove 37 is, as shown in FIG.
0 As clearly shown in its upper surface has a rectangular cross section integral with the bottom wall of the forming block is integrally coupled to the upper wall of the molding block through the rib 37 _1. The slide grooves 37 are opened through the slits 38 on the back surfaces of the first to third middle molded blocks 11, 13, 14. As shown in FIG. 5, a pair of nut plates 39 is slidably fitted on the left and right sides of each slide groove 37. As clearly shown in FIGS. 8 and 9, these nut plates 39 are formed in a strip shape from a plate material such as a steel plate, and a pair of bolt holes 40 ₁ , which are respectively opened on the upper and lower surfaces thereof, at both ends. 40 ₂ is opened. On the other hand, as shown in FIG. 4, the reinforcing support member St is formed to have a tapered shape in the vertical direction from its base to its tip, and as shown in FIG. And left and right mounting wing pieces 41 ₁ and 41 ₂ project outward on both sides in the width direction. And the left and right mounting wings 41 _1, 41 _2, the nut plate 39 bolt hole 40 ₁ of the end portions, 40 ₂ and a plurality of equal intervals each mounting hole 42 _1, 42 ₂ are arrayed. As shown in FIG. 5, the pair of reinforcing support members St are arranged on the left and right sides of the back surface of the load receiving main body Tb so as to coincide with the extension of the left and right base frames 4, and slide grooves 37 are provided.
While sliding the inner nut plate 39 to the left and right,
And its bolt holes 40 _1, 40 _2, mounting holes 42 ₁ of the reinforcing support member both attached wing 41 ₁ St, 41 _2, 42 ₂ and mixture was allowed to coincide with its through the respective mounting holes 42 _1, 42 ₂ If the mounting bolts 43 are screwed into the bolt holes 40 ₁ and 40 ₂ , the left and right reinforcing support members St can be fixed to the left and right sides of the back surface of the loading tray main body Tb substantially in the front-rear direction.
In this fixing work Thus, since the nut plate 39 can slide freely adjust the slide groove 37, the mounting holes 42 _1, 42 ₂ and the bolt holes 40 _1,
It is easy to align and 40 _2, mounting workability of the receiving platform body Tb and the reinforcing support member St is improved. The free ends of the left and right reinforcing support members St are connected to a connecting plate 4 made of an angle material and extending in a direction orthogonal to them.
The cushion rubber 45 is fixed to both sides of the lower surface of the connection plate 44. As shown in FIG. 5, on the back surface of the second middle molding block 13, a gate lock mechanism Gl for locking the rear end of the packing box 1 with the loading table T serving as a tailgate in a storage position, that is, a vertical position, is provided. Can be Since the gate lock mechanism Gl is a conventionally known one, a lock housing 47 is fixed to one side of the back surface of the second middle molding block 13 in order to briefly explain the structure. Has about 90 operating handles
It is supported so that it can rotate in the rotation range of °. An operation panel 49 is provided at the base of the operation handle 48 so as to be integrally rotatable therewith.
The swing links 50 are swingably supported with a phase difference of, and left and right lock pins 51 and 52 are rotatably connected to the free ends of these swing links 50, respectively. The left and right lock pins 51 and 52 are supported by the second middle molding block 13 so as to be movable in the left and right direction. By rotating the operation handle 48, the left and right lock pins 51 and 52 are moved in opposite directions via the operation panel 49 and the oscillating link 50, and their tips protrude and retract from the left and right outer surfaces of the second middle molding block 13. When the loading tray T is stood up and retracted, the lock pins 51, 52
Can be engaged with a locking portion (not shown) of the packing box 1 to lock the loading table T at the storage position. In this embodiment, the adjustment molding block 12 for adjusting the length of the loading tray T in the front-rear direction is used.
Considering the connection position of, referring to FIG.
FIG. 12 (A) shows the connection position of the adjustment molding block 12 in the embodiment, and according to this, the connection of the load receiving table main body Tb and the pair of reinforcing support members St by the mounting bolts 43 (the adjustment molding block 12). And the reinforcing support member St are not connected by the mounting bolts 43) substantially uniformly over the entire length of the load receiving table T in the front-rear direction, so that the strength of the load receiving table T can be increased and the gate lock mechanism Gl. Can be mounted at the position where the operation (operation by the worker when the loading tray T is stored) is most easily performed. However, if the adjustment molding block 12 is temporarily provided as shown in FIG.
When the connecting position of the base member is located between the bottom forming block 10 and the first middle forming block 11, the connection between the base of the reinforcing support member St and the receiving tray main body Tb by the mounting bolt 43 cannot be performed. When the luggage l is placed on the tip of T, the base of the receiving tray body Tb is bent as shown by the chain line in FIG. To solve this problem, FIG.
If the connection position of the adjustment molding block 12 is set between the second middle molding block 13 and the third middle molding block 14 as shown in FIG. 3C, it becomes difficult to mount the gate lock mechanism Gl (the gate lock mechanism Gl). When the four corners of the lock housing 47 are bolted, there is not enough space on the side of the loading tray main body Tb). FIG. 12C shows a chain line (a).
As shown in FIG.
When it is mounted at a position shifted toward the base side, the moment acting on the gate lock mechanism Gl increases, and damage to the gate lock mechanism Gl is stopped. Further, FIG.
(C) As shown by the chain line (b), the lock housing 47
Is mounted at a position shifted to the front side of the loading tray main body Tb, when the loading tray, that is, the rear gate is stored in the upright position, the operation position of the gate lock mechanism Gl becomes too high and manual operation by the operator becomes difficult. Become. FIG. 13 shows a first modified example of the slide grooves formed in the first to third middle molded blocks 11, 13, and 14 and the nut plate slidably fitted therein. The first modified example will be described with respect to the second middle forming block 13. In the forming block 13, a slide groove 137 having a closed cross section is formed between two reinforcing ribs 119 and 120 connecting the upper and lower walls. In this slide groove 137, a nut plate 1 having a square section is provided.
39 are slidably fitted. The left and right sides of the nut plate 139 have bolt holes 4 as in the previous embodiment.
0 _1, 40 ₂ are provided, these bolt holes 40 _1, 4
0 ₂ mounting hole 42 ₁ of the reinforcing support member St in, 42 ₂ mounting bolts 43 passing through the are screwed. FIG. 14 shows a second modification of a slide groove formed in each of the first to third middle molded blocks 11, 13, and 14 and a nut plate slidably fitted therein. The second modified example will be described with respect to the second middle molding block 13. In the molding block 13, a slide groove 237 having a T-shaped cross section is formed.
A nut plate 239 having a T-shaped cross section is slidably fitted in the slide groove 237. This left and right nut plate 239, also bolt holes 40 _1, 40 ₂ are provided as in the Example, these bolt holes 40
_1, 40 mounting hole 42 ₁ of ₂ in the reinforcing support member St, 42 ₂
The mounting bolt 43 penetrating through is screwed. Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various embodiments are possible within the scope of the present invention. For example, in the above-described embodiment, a case has been described in which the cargo handling platform of the present invention is applied to a rear lift device of a truck, but it is needless to say that this can be applied to other cargo handling devices. and Middle molding blocks may be two or four or more, adjusting the molding blocks may be two or more. Further, the cross-sectional shape of the slide groove is not limited to the above embodiment, and may be any shape. As described above, according to the present invention, each of
A loading / unloading device, comprising: a receiving tray main body formed by connecting a plurality of formed blocks in parallel on a single plane and integrally connecting them, and a reinforcing support member fixed to the back surface of the receiving tray main body. in receiving platform in, on the back surface of the receiving platform body, along the parallel direction of the forming block, the scan on its lower surface
A plurality of slide grooves having a concave cross-section opening through the lit are formed over the entire length thereof, a nut plate is slidably provided in the slide grooves, and a mounting bolt inserted through a mounting hole of the reinforcing support member is slit. by screwing the bolt hole of the nut plate through, since fixed the reinforcing support member to the back surface of the receiving platform body, the alignment of the mounting holes and the bolt holes is facilitated, reinforcement of the rear surface of the receiving platform body The operation of mounting the support member can be improved, and the manufacturing cost of the receiving table can be reduced. Each of the above
The sliding groove and the corresponding slit are
It is located at a position different from the mutual connection position and
During extrusion molding of the molding block where each slide groove is formed
It is molded at the same time .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear side view of a lorry equipped with a tailgate lifter. FIG. 2 is an exploded perspective view of a main part of a connecting portion between a loading tray lifting mechanism and the loading tray. FIG. FIG. 4 is a side view of the receiving tray; FIG. 5 is a bottom view of the receiving tray taken along line 5 of FIG. 4; FIG. 6 is an enlarged portion of FIG. 5 taken along line 6-6; FIG. 7 is a partial cross-sectional view showing an unconnected state of the molding block; FIG. 8 is an enlarged view of a portion viewed in the direction of arrow 8 in FIG. 5; FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. FIG. 11 is a sectional view taken along the line 10-10 in FIG. 9; FIG. 11 is a sectional view taken along the line 11-11 in FIG. 6; FIG. FIG. 14 (first modified example) FIG. 14 is a partial cross-sectional view of a middle molded block (second modified example) Description of reference numerals 10... Molded block ( Bottom forming block) 11 Forming block (first middle forming block) 12 Forming block (adjusting forming block) 13 Forming block (second middle forming block 14) ..... molding block (third middle molding block) 15 ..... molding block (top molding block) 37 ..... slide groove 38 ..... slit 39 ... ... Nut plate 40 ₁ ... Bolt hole 40 ₂ ... Bolt hole 42 ₁ ... Mounting hole 42 ₂ ... Mounting hole 43 ... Mounting bolt 137: slide groove 139: nut plate 237: slide groove 239: nut plate Tb: loading tray body St: reinforcement Support member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60P 1/44 B62D 33/02

Claims (1)

(57) [Claim 1] A loading tray main body formed by arranging a plurality of extruded molding blocks (10 to 15) in parallel on one plane and integrally connecting them. (Tb), and a reinforcing support member (St) fixed to the back surface of the loading tray body (Tb).
Becomes more, the receiving platform in handling device, on the back surface of the receiving platform body (Tb), along the parallel direction of the shaped blocks (10-15), slits on its lower surface
A plurality of slide grooves (37; 137; 237) having a concave cross section opened through (38) are formed over the entire length thereof, and nut plates (39; 139;) are formed in the slide grooves (37; 137; 237). 239) are slidably provided, and mounting holes (42 ₁ , 4) of the reinforcing support member (St) are provided.
2 ₂₎ inserted through mounting bolt (43), said slit
(38) through the nut plate (39; 139;
239) by screwing it to the bolt holes (40 ₁ , 40 ₂ ), thereby reinforcing the reinforcing support member (St) with the load receiving main body (T).
b) and fixed to the slide grooves (37; 13).
7; 237) and the corresponding slit (38)
Shape block (10-15) position different from mutual connection position
And the respective slide grooves (37; 13).
7; 237) are formed.
14) A receiving table in a cargo handling device, which is formed simultaneously with the extrusion molding of 14) .