JP3190006B2 - Mounting structure of the loading / unloading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for detachably mounting a loading / unloading device on a cargo box of a truck or the like.

[0002]

2. Description of the Related Art Conventionally, at the rear of a cargo box of a lorry, a loading table, which also serves as a rear door of the cargo box, is provided so as to be able to move up and down. A cargo truck lifting device called a so-called tailgate lifter is well known (for example, Japanese Patent Publication No. Hei 4-10).
No. 113).

[0003]

By the way, the above-mentioned conventional lorry with a loading / unloading device, such as a moving luggage,
It is convenient for loading and unloading relatively heavy and large luggage in a carton, which is difficult to carry, but on the other hand, it is relatively light and compact, which can be easily carried by workers like annual gifts. There is a problem that it may be more convenient to carry out unloading of the luggage to the packing box without the loading / unloading device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and solves the above-mentioned problems by allowing the loading / unloading device to be easily and easily detached from the packing box as needed. It is an object of the present invention to provide a new mounting structure of a loading / unloading device for lifting and lowering a receiving tray, which can perform a loading / unloading operation of a load.

[0005]

In order to achieve the above object, a feature of the invention according to claim 1 is a mounting structure of a loading tray lifting device for detachably mounting a loading tray lifting device to a packing box. The main girder below the floorboard of the packing box is opened.
A pair of vertical girders with a U-shaped cross section
And the open rear ends of these stringers
The loading support elevating device is connected to the mounting frame that supports the loading support so that the loading support can be raised and lowered so that the insertion support can be pulled out of the insertion support from behind. The insertion support portion is formed, and the insertion support portion and the insertion portion are integrally secured to the insertion support portion while the insertion portion is supported by the insertion support portion. That is, securing means is provided .

In order to achieve the above-mentioned object, the invention according to claim 2 is characterized in that in the above-mentioned claim 1, the securing means is provided at the insertion support portion with an interval in its longitudinal direction. A plurality of mounting holes formed in the insertion portion, a plurality of insertion holes formed in the insertion portion at an interval in the longitudinal direction thereof, and the plurality of mounting holes and the insertion holes that match each other. It consists of a securing device such as a bolt which is inserted and fixed, and is to secure the insertion support portion and the insertion portion integrally.

In order to achieve the above object, the invention according to claim 3 is characterized in that in the above-mentioned claim 1, the securing means is provided at the insertion support portion with a space in the longitudinal direction thereof. A plurality of open and fixed sheet plates,
A plurality of stoppers fixed to the insertion portion at intervals in the longitudinal direction thereof; and a securing device such as a U bolt for connecting and fixing the sheet plate and the stopper, wherein the insertion support portion and the insertion portion And to secure them together.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a rear side view of a cargo vehicle, showing a state before the loading stand elevating device is mounted. FIG. 2 is a rear side view of a cargo vehicle, showing a state where the loading stage elevating device is mounted. 3, FIG. 3 is a rear view of FIG. 2 as viewed in the direction of arrow 3, FIG. 4 is a side view showing the storage state of the loading / unloading device, and FIG. 5 is a plan view of the receiving device of FIG. 6, FIG. 6 is a rear view of the loading / unloading device as viewed from the direction of the arrow 6 in FIG. 4, FIG. 7 is an enlarged partial sectional view taken along the line 7-7 in FIG. 5, and FIG. FIG.

1 and 2, a cargo box B is mounted on a chassis frame F of a freight vehicle V. This packing box B
A loading tray lifting device C, which will be described in detail later, is configured to be detachably attached to a rear portion thereof.
Is composed of a main girder 2 fixed on the chassis frame F, a plurality of cross girder 4 laid on the main girder 2, and a floor plate 5 laid on the horizontal girder 4. The rear end face of the cargo bed 1 except for the main girder 2 is shielded by the decorative plate 6.

The chassis frame F may be composed of a main frame and a sub-frame fixed on the main frame.

The main girder 2 is provided with a pair of vertical girder 2 ₁ , 2 ₁ made of a steel material having a U-shaped cross section. Bolts and the like are placed on the chassis frame F with their open sides inside. Are fixed substantially parallel to each other in the front-rear direction. The rear ends of these vertical beams 2 ₁ , 2 ₁ are open, and constitute the insertion port 7 of the loading / unloading device C to be described later. Also on the rear of the main girder 2 made of a pair of stringer 2 _1, 2 _1, are formed insertion support portion S of the receiving platform lifting device C to be described later, constituting the insertion support portion S, a pair A plurality of mounting holes 8 are formed at the rear of the vertical beams 2 ₁ , 2 ₁ at intervals in the front-rear direction.

Next, the structure of the loading / unloading device C will be described in detail mainly with reference to FIGS.
The frame 10 comprises a pair of vertical frames 11, 11 parallel to each other at intervals in the horizontal direction, a cross member 12 integrally joined to the front ends of these vertical frames 11, 11, And a mounting pipe 13 rotatably supported by bearings 15 and 15 on triangular brackets 14 and 14 fixed to the rear end of the vertical frame. The pair of vertical frames 11, 11
Constitutes an insertion portion I for removably inserting into the insertion support portion S, is made of a steel material having a U-shaped cross section, the opening side thereof faces inward, and the The spacing D of the insertion support portion S formed on the main girder 2 of the packing box B is
The distance D 'is slightly smaller than the distance D' so as to be able to be inserted freely into the camera. The insertion portion I is provided with a plurality of insertion holes 16 that are formed in the insertion support portion S and that can correspond to the mounting holes 8. As will be described in detail later, After inserting the insertion portion I into the insertion support portion S of the main girder 2, the insertion hole 1
6 correspond to the mounting holes 8, respectively, and the bolts b are inserted into those holes and fixed, so that the mounting frame 10 is
Can be fixed to the rear part of the main girder 2.

The plurality of mounting holes 8 formed in the insertion support portion S, the plurality of insertion holes 16 formed in the insertion portion I, and the holes 8 and 16 are inserted. The plurality of bolts b to be fixed constitute a means for securing the insertion support portion S and the insertion portion I in the first embodiment.

[0015] As shown in FIGS.
Numeral 3 extends left and right longer than the vertical frames 11 and 11, and semicircular mounting portions 13 ₁ and 13 ₁ are integrally formed at the outer ends thereof. Elevating link mechanisms L, L are attached. A crank arm 18 is fixed to the mounting pipe 13 so as to be biased toward one of the bearings 15, 15, and the base end of the crank arm 18 is attached to the cross member 12.
The distal end of a rod of a storage cylinder 20 composed of a hydraulic cylinder, which is rotatably supported via a shaft, is connected. The mounting pipe 13 is turned by the expansion and contraction operation of the storage cylinder 20.

The mounting pipe 10 is mounted on the mounting frame 10.
3, a lock shaft 21 is rotatably supported in parallel with the lock shaft 21 via bearings 22,22. As shown in FIG. 5, the lock shaft 21 has one end protruding outward from the mounting frame 10, and a handle 23 is fixed to the lock shaft 21 so that an operator can manually rotate the lock shaft. As clearly shown in FIGS. 5 and 8, lock arms 24, 24 extending toward the mounting pipe 13 are fixed to both right and left ends of the lock shaft 21. First and second lock pieces 25 ₁ , 25 ₂ that can be engaged with and disengaged from the lock arm 24 are fixed at intervals in the circumferential direction, and when the storage cylinder 20 is in the most contracted position, the first lock piece 25 _1. Is engaged with the lock arm 24 in the lock position, whereby the mounting pipe 13 can be locked to the first lock position, that is, the loading / unloading device lifting device C, and the storage cylinder 20 can be moved to the most extended position. One time, the second lock piece 2
5 ₂ by engaging the lock arm 24 in the locked position, can be fastened to the mounting pipe 13 the second locking position or the storage position the handling platform lifting device C (the vehicle travel state).

Attachment portions 1 at both left and right ends of the attachment pipe 13
3 _1, 13 to _1, which operates lift operation and storage to support the receiving platform 30, the left and right lift link mechanism L of the pair, L is respectively supported.

The left and right lifting link mechanism L, L, since is configured in the same structure, to explain one of them for detail, the semicircular mounting portion 13 ₁ of the end of the mounting pipe 13, a square-shaped Mounting member 3 comprising a pair of mounting plates
The base end of the upper link 32 and the lower link 33, which are parallel to each other and are spaced apart from each other, are rotatable at the free end of the mounting member 31. At the front ends of these links 32, 33, straight mounting posts 36 having an L-shaped cross section are rotatably mounted.
Between a pair of mounting plates constituting the mounting member 31,
An elevating cylinder 40 composed of a hydraulic cylinder is provided, and an intermediate portion of the elevating cylinder 40 is rotatably supported by a mounting member 31. The rod end of the elevating cylinder 40 is connected to an upper link 32. The two links 32 and 33 can be vertically swung about pivots 34 and 35 by the expansion and contraction operation of the lifting cylinder 40. The mounting member 3
1, upper link 32, lower link 33 and mounting column 3
6 constitutes a parallel link mechanism, and the two links 3
When the members 2 and 33 swing about the pivots 34 and 35, the mounting column 36 is moved up and down in parallel.

Mounting column 3 for the left and right elevating link mechanisms L, L
The receiving tray 30 is supported by 6, 6 so that it can be extended and folded. The load receiving table 30 has a load receiving table main body 45 that is rotatably supported at its base end at the lower part of the left and right mounting columns 36, 36.
And an auxiliary table 46 which is hinged at its tip and can be folded on the load receiving table main body 45. Both ends of refraction support links 48, 48 (FIG. 12) are connected between both outer sides of the loading tray main body 45 and the left and right mounting columns 36, 36, respectively. The platform 30 can be held at a substantially horizontal projecting position. At the upper ends of the left and right mounting columns 36, 36, securing pieces 51, 51 are fixed, respectively.
Locking pins 52, 52 are fixed to both sides of 5,
After folding the loading table 30 so as to overlap the left and right mounting columns 36, 36, the locking pins 52, 52 are fixed to the securing pieces 52, 52.
, The load receiving table 30 can be secured at the folding position.

Next, the operation of this embodiment will be described. When the operator rotates the lock shaft 21 to the lock position and then extends the storage cylinder 40, as shown in FIG. 25 ₂ engaged with the lock arm 24, left and right mounting member 31 is locked in the storage position with the mounting pipe 13, and by contraction operation of the elevating cylinder 40, on the receiving platform 30, the lower link 32 and 33 By holding the loading tray 30 at the folding position via the interposition and further securing the loading tray 30 to the folding position, the loading tray lifting device C is held in the folded storage state as shown in FIG. From this state, the loading table elevating device C is lifted by an operator or a cargo handling machine, and the vertical frame 1 of the mounting frame 10 is lifted.
If the insertion portion I composed of 1, 1 is inserted into the insertion support portion S formed at the rear of the main girder 2 of the waiting freight vehicle V as shown by the arrow in FIG. The platform elevating device C is supported at the rear of the freight vehicle V. In this case, since the left and right lifting link mechanisms L, L of the loading table lifting device C are formed sufficiently wider than the lateral width of the cargo box B of the freight vehicle V, these lifting link mechanisms L, L are shown in FIG. , 3 can be located on both sides of the rear part of the packing box B. Here, the front and rear positions of the mounting frame 10 with respect to the main girder 2 are adjusted, and the mounting holes 8 of the main girder 2 and the mounting frame 1 are adjusted.
After matching the insertion holes 16.
Inserting and fixing mounting bolts b to…, 8…
The loading cradle lifting device C can be firmly attached and fixed to the insertion support portion S at the rear of the freight vehicle V.

In order to facilitate the designation of the mounting holes 8 and the insertion holes 16, the main girder 2 and the mounting frame 10 are provided with stoppers that engage with each other, though not shown. desirable. Further, in order to easily insert and mount the loading / unloading unit C to the freight vehicle V, the mounting frame 1 is required.
The width D 0, and slightly smaller setting the dimension to the width D 'between the longitudinal girders 2 _1, 2 ₁ main beam 2, suffices to absorb the packing box B, and displacement of the receiving platform lifting device C I just need. In this case, it is desirable to insert a spacer into the gap formed between the mounting frame 10 and the main girder 2 so as to prevent rattling of the loading tray elevating device C.

Further, in order to separate the loading / unloading device C from the freight vehicle V, the reverse operation of the insertion step may be performed.

Next, FIGS. 9 to 12 show the operating state of the loading / unloading device C. FIG. 9 shows a state in which the loading / unloading device C is stored and supported in the freight vehicle V. FIGS.
FIG. 12 shows a projecting process of the loading / unloading device, and FIG. 12 shows a lift operation state of the device.

Since the operation of the loading / unloading device is not different from that of the conventional one, the operation will be briefly described.
When the elevating cylinder 40 is extended while the left and right mounting members 31, 31 are locked in the retracted state, the parallel link is formed as shown in FIG.
The lower links 32 and 33 are pivoted downward about the pivots 34 and 35 to project. As a result, the loading tray 30 is lowered while maintaining a substantially horizontal state.

Next, from the state shown in FIG.
When the storage cylinder 20 is contracted after the lock 1 is unlocked, the left and right mounting members 31, 31 are rotated approximately 90 degrees counterclockwise.
° rotate. As a result, the upper and lower links 32 and 33 further rotate counterclockwise, and the mounting column 36 extends rearward while standing up from a substantially horizontal state to a substantially vertical state. The loading table 30 is maintained in the elevating operation state. Then by rotating the lock shaft 21 again in the locking position engages the locking arm 24 to the first lock piece 25 _1, the left and right mounting members 3
Lock 1, 31 in the operating position. This allows the loading platform 3
0 is maintained in the elevating operation state.

Next, as shown in FIG. 12, after the loading tray 30 is extended and supported substantially horizontally, the lifting cylinder 40 is extended and retracted, so that the loading tray 30 moves between the ground and the loading platform 1 of the loading box B in parallel. The cargo can be unloaded between the ground and the loading platform 1.

In order to store the loading cradle elevating device C at the rear of the packing box B, the above operation may be performed in reverse.

In the case of small packages that can be easily carried by a worker, such as middle-aged and year-end goods, the worker can directly transfer the small package to the packing box B without depending on the loading / unloading device C. It is more convenient to unload the cargo. In such a case, the loading / unloading device C is removed from the cargo box B as described above.

Next, a second embodiment of the present invention will be described with reference to FIGS.

In the second embodiment, the insertion support portion S
13 is structurally different from that of the first embodiment in securing means to the insertion portion I. FIG. 13 is a rear side view of a cargo vehicle, showing a state in which a loading / unloading device is mounted. 14
FIG. 15 is an enlarged sectional view taken along line 14-14 of FIG.
FIG. 15 is a plan view taken along the line 15-15 in FIG. 14, and the same members as those in the first embodiment are denoted by the same reference numerals.

At the rear of the left and right chassis frames F of the freight vehicle V, front and rear contact plates 60
U-shaped bolt engaging holes 61 are formed in the front and rear contact plates 60 on both the left and right sides of the chassis frame F. The front and rear seat plates 62 corresponding to the front and rear contact plates 60 are also provided before and after the insertion support portion S formed at the rear portion of the main girder 2 of the packing box B.
Are fixed, and these sheet plates 62 have
A bolt hole 63 is formed corresponding to the bolt engagement hole 61.

On the other hand, the left and right mounting frames 1 of the insertion portion I
0, the front and rear stoppers 64 are spaced apart in front and rear.
Are fixed corresponding to the contact plate 60 and the sheet plate 62, and the front and rear stoppers 64 are respectively provided with the bolt engaging holes 61 and the bolt holes 63.
A bolt insertion hole 65 is formed corresponding to.

As in the first embodiment, the insertion support portion S
After inserting the insertion portion I, as clearly shown in FIG.
The U-bolt 66 is inserted into the bolt engagement hole 61, the bolt insertion hole 65, and the bolt hole 63 which coincide with each other, and the nut 67 is screwed onto the upper end of the protruding U-bolt 66 on the seat plate 60. The insertion portion I can be firmly fixed to the support portion S.

The sheet plate 62, the stopper 64 and the U-bolt 66 constitute the securing means of the second embodiment.

The second embodiment has the same operation and effect as the first embodiment.

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 bolt is used to attach the loading / unloading device to the packing box. However, another equivalent fastening device may be used instead.

[0037]

As described above, according to the invention described in the claims , the main girder below the floor plate of the packing box has the open side inside.
And a pair of vertical girders with a U-shaped cross section
The insertion support section with the open rear end of the stringer
It consists of the back of the girder, while the lifting platform
The insertion support is attached to the mounting frame that supports the table
The insertion part is supported so that it can be freely inserted and removed from behind.
And the insertion portion is inserted into the insertion support portion and the insertion portion.
Secure them together while plugged in to the support
Since lashing means is provided, when carrying large luggage such as moving luggage, which is difficult to carry, use the loading / unloading device to transport small luggage such as mid-year goods, year-end goods, etc. The loading / unloading operation of the load can be performed directly by using the carrier of the packing box without depending on the loading / unloading device, and the work efficiency of the cargo handling operation can be improved. In addition, most of the load applied to the loading and unloading work by the loading tray mounting device is caused by the insertion support portion and the insertion portion which are inserted into each other with a predetermined span in the front-rear direction of the packing box. and it can be experienced by, can thereby be increased to reduce the load on the lashing means, the safety of the working it is possible to perform the unloading operations stable by handling platform lifting device.

[Brief description of the drawings]

FIG. 1 is a rear side view of a freight vehicle and a loading tray elevating device, showing a state before the device is mounted.

FIG. 2 is a rear side view of a freight vehicle, showing a state in which a loading tray elevating device is mounted.

FIG. 3 is a rear view of the freight vehicle taken along line 3 in FIG. 2;

FIG. 4 is a side view showing a storage state of the loading / unloading device.

FIG. 5 is a plan view of the loading tray elevating device taken along line 5 in FIG. 4;

FIG. 6 is a rear view of the loading tray elevating device as viewed in the direction of arrow 6 in FIG.

7 is an enlarged sectional view of the loading / unloading device, taken along line 7-7 in FIG. 5;

8 is a partial cross-sectional view of the loading / unloading device, taken along line 8-8 in FIG. 5;

FIG. 9 is an operation view showing a state in which the loading / unloading device is stored and supported in the freight vehicle.

FIG. 10 is an operation diagram showing a process of projecting the cargo handling platform elevating device from the cargo box.

FIG. 11 is an operation diagram showing a process of projecting the cargo table lifting device from the cargo box.

FIG. 12 is an operation diagram showing a lift operation state of the cargo table lifting device;

FIG. 13 is a rear side view of the freight vehicle, showing a state where the loading / unloading device is mounted.

FIG. 14 is an enlarged sectional view taken along line 14-14 of FIG. 13;

FIG. 15 is a plan view taken along the line 15-15 in FIG. 14;

[Explanation of symbols]

 5 floor plate 7 insertion hole 8 mounting hole 10 mounting frame 16 insertion port 30 Receiving table 62 ···· Sheet plate 64 ····· Stopper 66 ···· U-bolt B ······ Loading box C ·············· ..Plug-in part S ... Plug-in support part b ... Bolt

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-184534 (JP, A) JP-A-6-297994 (JP, A) JP-A-8-58460 (JP, A) JP-A-3- 109140 (JP, A) Japanese Utility Model Showa 63-46243 (JP, U) Japanese Utility Model Application Hei 6-67209 (JP, U) Japanese Translation of PCT International Publication No. 2-500901 (JP, A) (58) Field surveyed (Int. ⁷ , DB name) B60P 1/44

Claims (3)

(57) [Claims] 1. A mounting structure of a loading tray lifting device for detachably mounting a loading tray lifting device (C) to a loading box (B), wherein the loading box (B) is below a floor plate (5). Main girder (2) is open
A pair of vertical girders (2
₁ , 2 ₁ ), and of those stringers (2 ₁ , 2 ₁ )
Insertion support part (S) with open rear end as insertion port (7)
Is constituted by the rear part of the stringer (2 ₁ , 2 ₁ ), while the loading platform elevating device (C) is mounted on the mounting frame (10) supporting the loading platform (30) so as to be able to move up and down. supporting portion (S) to form a plug portion (I) which valve slide is freely plug supporting from behind, in the insertion support portion (S) and the insertion section (I) is the difference write
Wherein the parts (I) the insertion supporting portion in a state of being bayonet supported (S) providing the lashing means for lashing together it <br/> et al, the attachment structure of the receiving platform lifting device . 2. The securing means according to claim 1, wherein said securing means comprises:
A plurality of mounting holes (8) drilled at intervals in the longitudinal direction thereof, and a plurality of insertion holes (16) drilled in the insertion portion (I) at intervals in the longitudinal direction. ) And a securing device such as a bolt (b) which is inserted and fixed in the mounting hole (8) and the insertion hole (16) which coincide with each other, and is inserted into the insertion support portion (S). 2. A mounting structure for a lifting and lowering device according to claim 1, wherein said portion is fixed to said portion. 3. The securing means (S)
A plurality of sheet plates (60) fixed to the insertion portion (I) at intervals in the longitudinal direction; a plurality of stoppers (64) fixed to the insertion portion (I) at intervals in the longitudinal direction; 60) and a securing device such as a U-bolt (66) for connecting and fixing the stopper (64) to secure the insertion support portion (S) and the insertion portion (I) integrally. The mounting structure of the loading / unloading device according to claim 1, wherein: