JP3436908B2 - Loading platform - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a rear part of a lorry.
Or mounted on the side, used for loading and unloading luggage
Cradle in a lifting cradle
The present invention relates to a structure of a receiving table capable of performing the following. [0002] 2. Description of the Related Art FIG.
The concept of the conventional receiving platform used for
(A) is a side view shown in FIG.
(B) shows an expanded state. (A) in the figure
The receiving table 200 is composed of a main plate 201 and a sub plate.
Rate 202 and a hinge 203 for connecting them.
I have. Hinge 203 is connected to pins 204 and 205
Respectively, the main plate 201 and the sub plate 2
02. At the bottom of the main plate 206
The support portion 206 is fixed. This support portion 206
The right end is larger to the right than the right end of the main plate 201
Projecting from the position of the pin 205 in the unfolded state shown in FIG.
It protrudes further to the right. All of the above parts are
And a pin 2 provided at the left end of the main plate 206.
07 can be rotated. Also shown in (b)
As described above, by rotating the sub-plate 202
When the loading tray 200 is deployed, the hinge 203 is
For the rate 201, the sub-plate 202 is the hinge 2
03 to the maximum and hinge 2
03 and the sub-plate 202 contact the support portion 206
Supported. As a result, the main plate 201
A continuous receiving surface is formed on the plate 202 in a straight line.
It is. [0003] The conventional load as described above
In order to store the cradle 200 in the lower part of the vehicle body, FIG.
In the folded state shown in
Rotate. At this time, it turns due to the presence of the support portion 206.
The radius drawn by the tip of the part (shown by a dashed line in FIG. 26) is large.
It becomes. Therefore, the tip of the support portion 206 is
A problem of interference occurs. Avoid such interference
To the right from the position of the pin 205 when deployed.
The protrusion length of the support portion 206 protruding from the
Supporting part with in-plate 201 and sub-plate 202
It is conceivable to shorten 206. However, this
Each of these approaches has other problems. First, the projecting length of the support portion 206 is reduced.
Thus, the turning radius can be reduced. However,
The shorter the protruding length of the holding portion 206, the
When a load W is applied to the rate 202, the pin 205 is pressed.
The lifting force increases. As a result, FIG.
Pin 205 is pushed up slightly to
202 tilts. In this case, the stability as a receiving platform
Chip. At this time, the sub plate 202 and the support
206 is a line contact in the vehicle width direction at point X in FIG.
And the stress is concentrated here. Due to the concentration of stress
Deformation of the sub-plate 202 and the support portion 206 occurs.
Then, the inclination of the sub plate 202 further increases. This
As shown in FIG.
Stability is impaired. On the other hand, the main plate 20
Shortening the support portion 206 together with the sub-plate 202
And the receiving surface becomes smaller, and large objects cannot be
You. In view of the above-mentioned conventional problems, the present invention
Secures the size of the receiving surface and stable support during deployment
To provide a storage platform that is easy to store
You. [0006] SUMMARY OF THE INVENTION The present invention provides a two-player system.
Can rotate around the rotation axis provided for each.
Through a functional hinge,By manual operationFoldable to each other
Of the receiving cradle connected to the
In a state where the receiving platform is unfolded horizontally.
On the other plate side, the end shape that is obliquely upward when viewed from the side
Has a tip including a shapeAnd this tip is the hinge
In the immediate vicinity ofOn the support and the other plate of the receiving platform
Provided, and the receiving tray is in a horizontally deployed state.
On one plate side, match the shape of the tip
And a supported portion having one end portion abutting on the distal end portion.
(Claim 1). [0007] In the receiving table configured as described above.
Means that one end of the supported part abuts the tip of the support
And the other plate is supported by one plate
You. Such a support structure by contact between the supporting portion and the supported portion.
According to the structure, it is not necessary to put the other plate on the support.
Therefore, project the tip of the support part toward the other plate side.
There is no need to get them out. Therefore, the tip of the support section and the supported
One end of the holding partDirectly belowCan be placed near
You. This allows the receiving platform to be
The turning radius when turning and folding is compact.
can do. Also, the slant at the tip of the support
An upwardly-facing shape stably supports the other plate
Can be [0008] 1 to 23 show one embodiment of the present invention.
Fig. 5 is a view showing a loading tray lifting device using a loading tray according to the form.
FIG. 1 is a rear view of a body 101 of a lorry.
1 shows a loading tray lifting device 1 attached below a packing box 102.
It is a side view. First, in FIG. 1, behind the rear wheel 103
Each of the two side surfaces of the chassis 104 has an angled shape.
The mounting member 2 is mounted vertically, and the mounting member 2
Then, the slide rail 3 made of I-section steel is fixed horizontally.
Have been. The slide rail 3 is located behind the loading / unloading device 1
The movable side that slides while supporting the movable side member described
Guide the member horizontally. With the support base of these movable members
The first support plate 4 is thick (about 25 mm)
The second support plate 5 and the rectangular tubular connection pipe 6
You. [0009] A second rail is disposed adjacent to the slide rail 3.
1 The support plate 4 includes a sliding member (a side pad 69 described later (FIG.
17 and (b) of FIG.
And slide horizontally along the slide rail 3.
Is possible. On the left and right sides (both sides) of the vehicle
The first support plate 4 is connected to a train horizontally arranged in the width direction of the vehicle body.
It is welded to the outer periphery of the tie pipe 6. Also, the second support
The plate 5 is extrapolated to the connecting pipe 6 and is
Welded to the outer periphery of the connecting pipe 6 at a predetermined position outside the body width direction
Have been. Therefore, the first support plate 4 and the second support
The holding plate 5 and the connecting pipe 6 are structurally integrated with a support base.
Is composed. An operation switch and a control circuit for the loading / unloading device 1
The switch box 7 containing roads is installed only on the left side of the vehicle body.
Have been killed. This switch box 7 has a second support plate
5 and protrudes most outward in the vehicle width direction.
You. When the cover 7a is opened to the front, the key switch S1,
An elevating switch S2 is provided. Key switch S
1 has 3 positions: “OFF”, “ON” and “ST”
In the "OFF" and "ON" positions.
Even if you release it, you can hold the key in that position,
In the “ST” position, the key turns “ON” when you release your hand.
Return. The elevating switch S2 is a neutral position automatic reset type toggle.
Switch between the “up” and “down” positions across the neutral position.
It has three positions of "fall". The lifting switch S2 is
When a tractor-type cable is connected and the switch
It can also be pulled out from the box 7 and operated. one
Power unit box containing hydraulic pumps, valves, etc.
Box 8 (shown by a broken line) is provided only on the right side of the vehicle body.
And is fixed to the second support plate 5 on the right side. FIG. 2 is a block diagram of the switch box 7 shown in FIG.
In addition, the illustration of the power unit box 8 is omitted, and
Structure relating to slide mechanism and elevating mechanism of table elevating device 1
FIG. FIGS. 3 to 6 correspond to FIGS.
The process of extracting and deploying the loading / unloading device 1 in the state
It is a side view shown in FIG. In FIG.
The arm 9 is fixed around a pin 10 provided at the left end.
This pin 10 is connected to the connecting pipe 6
Is attached to the support section 11 fixed to the support section. Lower
The right end of the system 9 is connected via a pin 12 to a link body (vertical link).
13). A parallel link is formed together with the lower arm 9.
The upper arm 14 is centered on a pin 15 provided at the left end.
The pin 15 is vertically rotatable within a predetermined range.
It is attached to an auxiliary link 16 in a shape. Upper arm 1
4 is connected to the link body 13 via the pin 17.
Have been. The upper arm 14 has a side shape like a long knife.
And a substantially L-shaped tip 14b.
It is configured. The base 14a is connected to the second support plate 5
It consists of a pair of steel plates of the same shape
A hydraulic cylinder (hereinafter referred to as a lifting drive mechanism) between a pair of steel plates
Below, it is called a lift cylinder. ) 20 are arranged. The auxiliary link 16 has a pin 18
The pin 18 is rotatable within a predetermined range.
It is attached to the plate 5. Lower left end of auxiliary link 16
On the side, a stopper 19 consisting of bolts and nuts is attached.
The head of the stopper 19 (bolt
When the head part) contacts the second support plate 5, the auxiliary link 1
6 is restricted from rotating in the clockwise direction. Lift syringe
The ends of the die 20 are respectively held by pins 21 and 22.
It is connected to the auxiliary link 16 and the upper arm 14.
The pair of left and right upper arms 14 is a part of the tip 14b,
The connecting pipes 23 arranged horizontally in the width direction of the body
Linked to each other. Also, the trunk 14 of the upper arm 14
A short angle member 24 is welded to the upper end surface of a.
The angle member 24 is composed of bolts, nuts, and the like.
The stopper 25 is attached. This stopper 2
5 comes into contact with the second support plate 5 so that the upper arm 1
4 rotates counterclockwise beyond the allowable rotation range.
And has prevented. The link body 13 has a pin 26 as a center.
A rotating hinge 27 is attached. This hinge
27 is a loading platform (platform) via another pin 28;
Also has two pivot points.
Double hinge. Therefore, the receiving platform 29 moves the pin 28
It can rotate around the heart, and the pin 26
It is pivotable. The receiving table 29 includes a main plate 30
And a sub-plate 31. May
The plate 30 and the sub-plate 31 are connected to the hinge
27 by means of a hinge 32 which is a double hinge similar to 27
It is connected. FIG. 9 shows a state in which the goods are unloaded (see FIG. 7).
Stand 29 from the back side (the side on which luggage is placed is the front side)
FIG. In FIG. 2 or FIG.
A U-shaped guide 33 is provided on the back side of 30.
With the mouth facing inward, a pair corresponding to the slide rail 3
(See also FIG. 12 below.) These pair
Guide 33 corresponds to the time when the loading / unloading device 1 is stored.
When it is engaged with the slide rail 3
Both also have the function of reinforcing the main plate 30
I do. An elastic member is provided on the back side of the main plate 30.
A pair of backing plates 34 made of rubber or the like are provided.
The contact plate 34 comes into contact with the ground when the loading tray 29 is deployed.
It becomes a cushion (see Fig. 5 and Fig. 6),
Let it be determined. Similarly, a pair of sub-plates 31
An abutment plate 35 is provided. Also, the sub plate 31
On one side, 49 is attached. Next, in FIG. 4, the upper end surface of the lower arm 9 is shown.
The switch mounting plate 36 is provided to project slightly upward from
The detection switch 37 is attached to the switch mounting plate 36.
Attached. Dog 3 for operating detection switch 37
8 is provided adjacent to the backing plate 35 of the sub-plate 31.
ing. The folded receiving platform 29 is placed on the upper arm 14.
When stacked (see FIG. 3), the contact plate 35 is switched
The stopper 38 comes into contact with the attachment plate 36, and the dog 38
The switch 37 is operated. [0017] In addition, there is an unlock between the left and right slide rails 3.
The glue 39 is mounted horizontally in the vehicle width direction.
A mounting plate 40 is fixed to the center of the glue 39. Mounting
The plate 40 is provided with a slide drive mechanism via a pin 41.
Hydraulic cylinders (hereinafter referred to as slide cylinders)
The distal end of the piston rod 42a is supported.
A cylinder housing the cylinder part of the slide cylinder 42
The support member 43 is disposed horizontally in the front-rear direction of the vehicle body,
At the position where the connection pipe 6 intersects,
Touched. The right end of the cylinder support member 43 has multiple
A lock member 44 having a number of holes 44a is attached
I have. The triangular guide roller support member 45 is
A pin 46 attached to the right end of the cylinder support member 43
Can be pivoted along a vertical plane around the
Guide roller 48 is rotatable by the pin 47
I support it. The hole 44a of the lock member 44 is
The hole 45a provided on the left end side of the roller support member 45 is a pin.
It is formed on a circular orbit drawn around the center 46. Follow
The hole 45a of the guide roller support member 45 is
4a and guide bolt
Can be mounted at a desired mounting angle.
Wear. The slide cylinder 42 is used for supplying and discharging hydraulic pressure.
With the expansion and contraction operation, the connecting pipe 6
The slide operation is performed with respect to 41. Therefore, connecting pipe 6
All members directly or indirectly supported by
Become. That is, the mounting member 2, the slide rail 3,
The glue 39, the mounting plate 40, and the pins 41 are mounted on the loading tray.
The fixed side member of the device 1 serves as a connection with the fixed side member.
The remaining members, including the piston rod 42a, are movable
It is a side member. The loading platform lifting device 1 is separate from the vehicle body.
Installed against the completed chassis 104 of the vehicle
By fixing the attachment member 2, it is taken as one unit.
Attached. Therefore, the mounting is simple. FIG. 15 shows a receiving tray folded and stored.
It is the figure which looked at the raising / lowering apparatus 1 from the vehicle body back. Link body 13
The rear end face is substantially vertical and continuous in the vehicle width direction,
Can also be used as a rear bumper (rush prevention device)
You. Therefore, there is no need to provide a separate rear bumper.
No bumper mounting member is required. In addition, separate rear bumper
Since it is not necessary to provide the
Can be sufficiently secured. In addition, phosphorus
Body 13 is a member that is continuous in the vehicle width direction.
Between the left and right pair of the upper arm 14 and the lower arm 9
This has the effect of preventing torsion. Note that the
If a bumper is to be provided, the hinge 27 shown in FIG.
A metal plate on the rear end face 30a of the main plate 30
It is also possible to attach a rear bumper. Next, the detailed structure of the folded portion of the receiving table 29
Will be described. As shown in FIG. 9, the main plate
30 and a pair of hinges 32 connecting the sub-plate 31
Are equipped with torsion bars 50, respectively.
FIG. 10 is a side showing details around the hinge 32 of the loading tray 29.
FIG. 3A is a front view, and FIG.
FIG. 3B shows a state in which the plate 31 is upright.
The sub-plate 31 is fully deployed with respect to the plate 30
This shows a state in which (down). The hinge 32 is
A hinge pin 321 provided on the main plate 30
And the hinge pin 322 provided on the sub-plate 31
A double hinge that can rotate around these as a rotation axis
You. FIG. 12 shows the folded state of the loading tray 29.
A view of the periphery of the hinge 32 as viewed from the rear (for example, the rear of FIG. 5)
It is. As shown in FIG. 12, the torsion bar 50
Are mounted on one hinge 32, and the upper two
The bent one end is fixed to the sub plate 31 and bent.
The other end is inserted slightly above the center of the hinge 32
Fixed. In addition, the lower two are each bent one end
Is fixed to the main plate 30 and the bent other end is
It is inserted slightly below the center of the
You. The torsion bar 50 shown in FIG.
Attached when the sub-plate 31 shown in FIG.
Is done. That is, in this state, the torsion bar 50 is
It is. Therefore, the sub-plate 31 is turned from this state.
4 torsion against the back of hinge 32 when moved
A force is evenly applied from the bar 50. As a result, the hinge 32
Always corresponds to half of the rotation angle of the sub-plate 31.
Follows the sub-plate 31 with a rotation. For example,
In the state shown in FIG.
The rotation amount of the sub plate 31 from the state is 90 degrees,
On the other hand, the pivot amount of the hinge 32 is 45 degrees. Assuming that the torsion bar 50 as described above is
If not used, only one pin of hinge 32
Since the sub-plate 31 rotates as a center, a so-called
The hinge 32 breaks, preventing smooth rotation.
You. Therefore, the use of the torsion bar 50 is
This prevents the waist from breaking and makes the sub-plate 31 smooth.
Can be rotated. The unfolded state shown in FIG.
12 and in the folded state shown in FIG.
-50 is in the maximum twisted state and the sub-plate 3
Reference numeral 1 denotes the main plate 30 as shown in FIG.
It is urged to return to the state. Therefore, the receiving platform 29
The sub-plate 31 is raised from the folded or unfolded state of
The force required for standing can be reduced. On the other hand, in FIG.
0 is provided with a support portion 301 (see also FIG. 9) on the back surface side.
The front end portion 301a of the support portion 301 is viewed from the side.
It has an obliquely upward terminal shape. Also, sub play
A supported portion 311 is provided on the back surface side of the
At one end 311a, the loading table 29 is developed horizontally.
In the state shown in FIG.
Diagonally downward end that abuts in conformity with the shape of 1a
It has a shape. In the receiving table 29 configured as above,
Is a sub-play from the state shown in (a) to the state shown in (b).
When the port 31 is folded down, the one end 31 of the supported portion 311 is
1a comes into contact with the tip portion 301a of the support portion 301, and
A state of surface contact is established. Therefore, the sub-plate 31
Due to the contact force of the
It is stably supported by the in-plate 30. Also, surface contact
Thereby, concentration of stress can be avoided. like this
Supporting structure by contact between supporting portion 301 and supported portion 311
According to the above, it is necessary to place the sub-plate 31 on the support portion 301.
It is not necessary to use a sub
There is no need to protrude greatly to the rate 31 side. Therefore,
As shown in FIG.
The one end 311a of the holding portion 311 is connected to the vicinity of the hinge 32 (hin).
(Substantially directly below the dipin 322). Ma
The supported portion 31 is formed by the obliquely upward tip portion 301a.
By supporting one end 311a of the sub play 1
Can be stably supported. In the above embodiment, the support 30
1, the entire end of the tip portion 301a is obliquely upward.
However, it may include an obliquely upward part.
No. For example, as shown in FIG.
Is composed of a vertical part and an obliquely upward part
Is also good. Also, the slope is not limited to a straight line,
Is also good. Next, the link body 13 and the main plate 30
A detailed structure of a connection portion with the device will be described. FIG. 13 and
FIG. 14 is a sectional view of the connection portion (the upper arm 14 and the lower arm 14).
Arm 9 is shown in phantom. ). In the figure,
The spring 51 is wound around the pin 28 of the hinge 27.
(See also FIG. 9). Torsion
One end of the spring 51 is on the main plate 30 and the other end is
Each is fixed to a hinge 27. Main plate
Receiving 30 in a 90-degree positional relationship with hinge 27
In the folded state of the table 29 (the state shown in FIGS. 2 and 3),
The torsion spring 51 is in a free state.
You. The loading table 29 is lifted from the folded state.
When the main plate 30 is removed, the pin 2 of the hinge 27 is
There is a possibility of turning around the pin 6 or the pin 28. I
However, the rotation about the pin 26 is not restricted at all.
On the other hand, rotation around the pin 28 is torsion.
The load is limited by the spring 51. This result
As a result, the main plate 30 is held upright as shown in FIG.
Follow the rotation of the main plate 30 until it is raised
Thus, the hinge 27 rotates about the pin 26. Therefore
No buckling of the hinge occurs, and the main plate 30
Can be smoothly rotated. When the main plate 30 stands upright, the hinge
27 hits the link body 13 and further rotation is restricted.
It is. Therefore, after this, the main plate 30
8 while rotating the torsion spring 51
Move. In the unfolded state of the main plate 30 shown in FIG.
In addition, the torsion spring 51 is in the maximum torsion state.
is there. Conversely, the main plate 30 is folded from the unfolded state.
When the main plate 30 is in the upright position,
Rotate around 8 to move from upright to folded
Rotates about the pin 26. Next, the hydraulic system of the loading / unloading device 1 will be described.
Will be explained. FIG. 16 is a hydraulic circuit diagram. Hydraulic circuit
Is a pair of lift cylinder 20 and slide cylinder 4
2. hydraulic pumps 81, 2 driven by a motor 80
Four solenoid valves 82 to 85, which are position valves, perform the same operation
A pair of solenoid valves 86, a reservoir tank 87, a pressure reducing valve 88,
Are constituted by other illustrated elements. Lift syringe
Elements other than the slider 20 and the slide cylinder 42 are mainly
Stored in the power unit box 8 (Fig. 1)
You. The operation of the hydraulic circuit is based on the extension of the slide cylinder 42.
(Drawer) / Shrink (Retract), Extend Lift Cylinder 20
There are four modes corresponding to (up) and contraction (down). First, the slide cylinder 42 is extended.
When the hydraulic pump 81 is driven,
The solenoid valves 82 to 86 are de-energized. This allows
Hydraulic pressure is applied to the piston rod side chamber 42r of the ride cylinder 42.
Is supplied to the piston through the solenoid valve 84.
Oil pressure is also supplied to the pad side chamber 42h. Where the fixie
Between the hydraulic pressure P supplied to the rod side chamber 42r and the piston.
The hydraulic pressure P supplied to the head side chamber 42h is equal to the hydraulic pressure P supplied to the head side chamber 42h. I
However, depending on the presence or absence of the piston rod 42a, the piston rod
The piston receiving pressure area Sr of the head side chamber 42r is equal to the piston head.
Smaller than the piston pressure receiving area Sh of the pressure side chamber 42h. Follow
Therefore, the driving force applied to both sides of the piston head is P · (S
h-Sr), which is opposite to the piston rod 42a.
Driving force in the extending direction. Further, based on the pressure receiving area difference as described above,
Receiving the driving force, the slide cylinder 42
If excessive resistance to extension is applied, the piston
No excessive compressive force is applied to the rod 42a. Obedience
Thus, it is possible to reliably prevent the buckling of the piston rod 42a.
Can be. Note that the solenoid valve 83 is in the non-excited state.
The hydraulic pressure applied to the lift cylinder 20 by the internal check valve
Is not supplied. When contracting the slide cylinder 42, use oil
The pressure pump is driven and the solenoid valves 84 and 85
Only is excited. Therefore, the piston rod side chamber 42r
Only the hydraulic pressure is supplied, and the oil liquid in the piston head side chamber 42h is
Is connected to a reservoir tank 87 via a solenoid valve 85 in a communicating state.
Is returned to. As a result, the piston rod 42a returns
The slide cylinder 42 contracts by receiving the driving force in the reverse direction.
The driving force in this case is substantially represented by P · Sr. Usually Sr
Is approximately 1/2 of Sh, so that the driving force P · Sr
It is almost equal to the driving force P · (Sh−Sr) at the time of extension described above. Obedience
Therefore, the speed at the time of extension and the speed at the time of contraction are substantially the same.
You. In this way, the slide cylinder
According to the configuration of extending and retracting the
A two-position valve is sufficient for both the two solenoid valves 84 and 85
Therefore, there is no need to use an expensive three-position valve, which is economical.
It is. On the other hand, the extension operation of the slide cylinder 42
Later, when extending the lift cylinder 20, the hydraulic pump
Is driven, and only the solenoid valve 83 is excited.
It is. By the excitation of the solenoid valve 83, the hydraulic pressure is increased by the solenoid valve 83 and
86 to the lift cylinder 20 and the lift cylinder
The cylinder 20 extends. At this time, slide series
The oil pressure is continuously supplied to the cylinder 42. on the other hand,
After the extension of the lift cylinder 20, the hydraulic pump 81 is stopped.
The lift cylinder 2
The oil liquid in 0 does not return. Therefore, the lift cylinder 20
Are held in an extended state. The lift cylinder 20
When the hydraulic pump 81 is stopped, the solenoid valve is stopped.
Only 82 and 86 are excited. Therefore, lift syringe
The oil liquid in the hopper 20 is supplied from the communicating electromagnetic valve 86 to the electromagnetic valve 8.
3 and then through the communicating solenoid valve 82 to the reservoir.
It is returned to the bat tank 87. Next, the slide lock device will be described.
You. 1 to 7 are omitted for simplification of the drawings.
Although not shown, a slurry shown in FIG.
An idlock device 60 is provided. (A) of FIG.
Is a horizontal sectional view of a main part of the slide lock device 60.
(B) is a vertical sectional view. 17 and FIG.
Then, the lock rod 61 penetrates through the second support plate 5 and is attached.
The plate 62 is rotatable around the axis with respect to the second support plate 5.
Installed. The tip of the lock rod 61 is compressed
The engaging pin 64 is movably moved in the axial direction via the spring 63.
Is attached. The tip of the engaging pin 64 is tapered.
The tip including the tapered portion 64a slides.
The storage position hole 3b provided on the rail 3 (see FIGS. 3 and 4)
17) and the drawer position hole 3a (see FIGS. 17, and 1 and 2).
)). The drawer position hole 3a is
(The distance from the center of the rear wheel to the rear of the vehicle)
In order to be able to adjust the take-out position,
I have. Between the storage position hole 3b and the drawer position hole 3a
Is a lock slide having tapered portions 68a at both ends.
Pad 68 is attached. On the first support plate 4 facing the slide rail 3
The side pad 69 which is a sliding member is attached
(See FIGS. 17 and 18B). This side
The stopper 69 provided on the slide rail 3
The position corresponding to c (FIG. 17) is the extraction position. FIG.
The side pad 69 attached at the position shown in FIG.
When hitting the hopper 3c, the engagement pin 64 is moved to the rightmost position in the drawing.
With the drawing position hole 3a. Side pad 69
The mounting position can be shifted to the right from the position shown
So that the side
By shifting the mounting position of the pad 69, the center
Engaging hole 3a or the leftmost drawing position hole 3a.
Can be engaged. The lock rod 61 is connected to the lock rod 61 via a connecting pattern 65.
Handle 66 is attached. Lock rod 61 and
The rotation range of the handle 66 is 180 degrees.
And FIG. 18 shows a state in which the handle 66 is lowered directly below.
Is shown. One end of the extension spring 67 is
It is partially locked, and the other end is attached to the mounting plate 62.
You. Therefore, the handle 66 located directly below is rotated.
The handle 66 is partially moved against the tension spring 67.
Rotate clockwise. When rotated in this way,
The handle 66 is directly urged by the tension spring 67 again.
Held in position. When the handle 66 is directly above,
The direction of the tapered portion 64a of the pin 64 is different from that of FIG.
The opposite is true (the lower side of the figure is the tapered portion). Therefore,
Depending on whether the ride is in the retracted direction or the withdrawn direction,
The taper portion 64a is operated in the storage direction when the storage 66 is operated.
Turn to. When pulling out, it is tapered in the pull-out direction.
Turn the part 64a. When the handle 66 is pulled out or stored.
After the slide operation starts, the slide
The locking device 60 slides with the second support plate 5 and the like.
First, the tapered portion 64a of the engagement pin 64 is pressed. This
As a result, while the engagement pin 64 presses and compresses the compression spring 63,
Remove the drawer position hole 3a or the storage position hole 3b from the
The ride lock device 60 can be moved. Engaging pin 6
4 further rides on the lock slide pad 68
Slide. If the slide is in the storage direction, the slide
At the end of the contraction operation of the cylinder 42 (FIGS.
Button 64 engages with the storage position hole 3b. Once engaged,
Unless the tapered portion 64a is directed in the pull-out direction, the engagement pin
The screw 64 does not fall out naturally. Therefore, the running of the vehicle
During this, the movable member of the loading / unloading device 1 is pulled by vibration.
Can be prevented from being issued. Hand drawer
In the case of sliding in the direction
The slide operation is stopped by contacting the
4 engages with the corresponding drawer position hole 3a. Once engaged
Then, unless the tapered portion 64a is oriented in the storage direction,
The mating pin 64 does not come off naturally. Therefore, on the slope
Pull out when loading / unloading with the body lowered
Moving side member moved in the storage direction by gravity
It is possible to avoid danger due to falling of the luggage. Next, a securing device for the loading tray 29 will be described.
I do. The folded state is maintained in the loading tray 29
Lashing device is provided. FIG. 19 shows the receiving table 2
9 is a view showing only a portion 9,
The male engaging portion 70 is attached to the sub plate 31
A female engaged portion 73 is attached. Receiving platform 29
In the state before the is folded ((a) in the figure), the engagement
The part 70 slightly protrudes from the upper surface of the main plate 30.
I have. The state in which the sub-plate 31 is folded (in the figure,
In (b)), the engaging portion 70 mutually engages with the engaged portion 73.
In the holding state, the sub plate 31 becomes the main plate 3
It is kept at 0. FIG. 20 is a sectional view showing details of the lashing device.
is there. In the figure, an engaging portion 70 includes a mounting seat 71 and a tip.
Have a mushroom-shaped pin 72. Female part to be engaged
Reference numeral 73 denotes a housing 74, an engagement piece 75 with the pin 72,
A spring 76, one spring receiver 77 and the other spring receiver 7
8 and a push button integrated with the spring receiver 78.
And a tongue 79 (see also FIG. 9). Engagement piece 75
Consists of a combination of three split members,
The upper and lower ends of the engagement piece 75 housed in 74 are in a natural state.
She is inwardly in a state. In the state of FIG. 20,
The lower end of the engagement piece 75 is pushed open by the spring receiver 77.
The opening 75a is large enough to receive the pin 72.
ing. Also, the upper end side of the engagement piece 75 is inwardly tapered.
I have. At this time, the engagement piece 75 is attached to the bottom of the engagement side with the pin 72.
FIG. 22A shows the shape viewed from the surface. Place the sub plate 31 on the main plate 30
The pin 72 is relatively moved into the engaged portion 73 by folding
The spring receiver 77 is pushed by the pin 72.
Can be raised. Also, as shown in FIG.
To push up the spring receiver 78 via the compression spring 76,
The upper side of the receptacle 78 is pushed out of the housing 74 and the push button
The tongue 79 projects. Thereby, the engagement piece 75 is
The upper end is extrapolated to the large diameter part of the spring receiver 78
Pushed open. On the other hand, the lower end of the engagement piece 75 is
The push-opening by 77 is released, and it is in the state of being depressed
(See (b) of FIG. 22). Thereby, the head of the pin 72
Is held in a state of being engaged with the engagement piece 75. Also compressed
The pin 72 is also stably held under the bias of the spring 76.
Therefore, the sub plate 31 is fixed to the main plate 30.
And it does not come off naturally. To release the engagement (locking), press
Press the button 79. When the push button 79 is pressed,
The engagement piece 75 is disengaged from the large-diameter portion of the spring receiver 78 and is pushed open.
The state that was set is released. Thereby, the engagement piece 75
The upper end tapers inward. Therefore, it is easy to spread at the lower end
It becomes. Further, the compression force is
The spring receiver 77 is pushed downward through the spring 76 so that the engagement piece 7
The lower end of 5 is pushed open to enlarge the opening 75a. This
In the state of, while pressing the push button 79,
When the rate 31 is lifted, the pin 72
Then, the shackle is released. Next, the lifting mechanism of the receiving table 29 will be described.
This will be described in detail. FIG. 8 shows the main parts related to the elevating operation.
FIG. 8 is a side view showing only the parts, and the reference numerals of the respective parts are the same as those in FIGS.
It is. In FIG. 8, (a) is the same as the floor of the cargo box of the vehicle body.
A state in which the receiving platform 29 is raised so as to be on one side,
(B) is a state where the loading tray 29 is horizontal on the ground, and (c) is
The state where the loading tray 29 is inclined on the ground is shown
I have. Here, the pin 18 is a rotation fulcrum of the auxiliary link 16.
Yes, it is a fixed point in the movable side member. On the other hand,
15 and 21 can move according to the rotation of the auxiliary link 16.
It is a moving point. The pin 10 is related to the auxiliary link 16.
It is a fixed point that is not fixed. Other pins 12, 1
7, 22, and 28 move according to the elevating operation. First, the ascending movement from the state (c) to the state (a) is performed.
The work will be described. (C) In the lift cylinder
20 is in a contracted state, and the auxiliary link 16 is (b)
When the state shown in is vertical, slightly counterclockwise
It is in a free state rotated in the direction. Lift operation from this state
When the lift cylinder 20 starts to extend, the pin
Auxiliary link 16 rotates slightly clockwise via 21
I do. With this rotation, the pin 15 also slightly turns in the same direction.
Move. Therefore, the pin 17 is connected via the upper arm 14 as shown in FIG.
Slightly pulled to the left. On the other hand, pin 10 is fixed
Because it is a point, the pin 12 does not move at this point,
Have been. Therefore, with the pin 12 as a pivot point, the link
The body 13 and the receiving platform 29 rotate counterclockwise,
The upper surface 13a of the link body 13 and the receiving tray 29 are shown in FIG.
So that it is horizontal. At this time, do not rotate further than horizontal.
Design the position of each pin so that
9 (see FIG. 7) is adjusted in advance. The above-described tilt operation of the receiving tray 29 (tilt
From horizontal to horizontal or vice versa), pin 18
15 is B point and pin 21 is C point, B below point A
There is a point and there is a point C below the point B
It is done in. In addition, distance AC is greater than distance AB
The relationship is large. As a result, the lift system
The rotation distance of the point B with respect to the stroke amount of the cylinder 20 is
It is almost AB / AC, which is smaller than the operation of the lift cylinder 20.
Then, the tilt operation becomes slow. Pin 17 is set at point D,
Assuming that pin 12 is point E, line segment AB and line segment BD intersect.
Is slightly larger than 90 degrees in the state of (c),
In the state of (b), it is slightly smaller than 90 degrees. That is,
In the state change from (c) to (b), the angle is 9
It changes around 0 degrees. This means that points B and D
Effect that the rotation speed of the motor becomes almost constant from the start to the end
Bring. For example, when a package is placed on the receiving table 29,
Acceleration or deceleration from the state of (c) to the state of (b)
If the tilt movement occurs, the luggage may swing or
May fall over, but as mentioned above
According to the tilt operation, there is no such fear. The auxiliary link 16 reaches the state shown in FIG.
Then, the stopper 19 comes into contact with the second support plate 5 and the auxiliary
The link 16 cannot rotate any more. Here, pin 1
Assuming that 0 is the point F, the points B, D, and E are:
The line segment BF and the line segment DE are parallel to each other.
The BD and the line segment FE are in a parallel relationship with each other. Sand
The square BDEF is a parallelogram and the upper arm 14
And the lower arm 9, the point B and the point F are used as pivot points, and the point D is
And the parallel link having the point E as an action point. This
Is maintained thereafter up to the raised position. Follow
Therefore, the upper surface 13a of the link body 13 and the loading tray 29 are horizontal.
Stay state. When the lift cylinder 20 is in the state shown in FIG.
When extended, the pin 21 located below the parallelogram is
A driving force is applied to the pin 22 in the parallelogram as a fulcrum.
Is given, the parallel link is centered on points B and F
It turns in the counterclockwise direction, and the loading tray 29 rises. Packing box
The floor, the upper surface 13a of the link body 13 and the receiving table 29
At the same plane, the stopper 25 (see FIG. 7)
The rotation of the upper arm 14 is stopped by contacting the second support plate 5,
The lifting of the receiving table 29 stops. After stopping the ascent, the hydraulic pump
81 increases the hydraulic pressure, but this hydraulic pressure
It is released by the pressure valve 88 (see FIG. 16). It should be noted that the link body 13 and the
Stopping the lifting of the loading table 29 by hitting the upper arm 14 etc.
It is also possible. However, the packing box 102 is generally
The link body 13 and the upper arm 14 are made of aluminum.
Is an iron-based metal such as iron or stainless steel.
A ferrous metal having a hardness higher than that of
When the lifting of the cradle 29 is stopped, the packing box 102 is damaged. Obedience
Therefore, it is necessary to provide additional reinforcement at the contact part of the packing box 102.
Occurs and is troublesome. In that regard, as described above, the second support
The configuration in which the stopper 25 is applied to the plate 5 is simple and robust.
It is length. Next, the state shown in FIG.
The descending operation will be described. In the state of (a),
The lowering operation is performed, and the lift cylinder 20 starts to contract.
Then, the operation reverse to that at the time of ascending is performed, and the state shown in FIG.
You. Here, the tip of the lower link 9 lands and stops rotating.
At this time, the link body 13 and the receiving table 29 and the
The total weight of the luggage placed on the
Acts as a force in the direction to rotate the pin 17 clockwise.
Good. Here, when the lift cylinder 20 further contracts,
Auxiliary link 16 is counterclockwise around pin 18
To rotate slightly. As a result, the pin 15 moves the pin 18
Rotates counterclockwise around the heart. The rotation of the pin 15
The pin 17 is turned clockwise around the pin 12.
And the receiving platform 29 tilts to lower its tip.
I do. As in the case of ascent, the tilt operation is
The rotation distance of AB / AC with respect to the contraction of the
And it is performed at a substantially constant speed. Therefore, the receiving platform 29 is almost
Incline slowly at a constant speed. Therefore, the luggage swings
Also, there is no possibility of falling over. Next, the lifting and lowering of the receiving table constructed as described above
A series of operations and operations (storage, withdrawal and
And elevation) will be described with reference to FIGS. Ma
After stopping the vehicle and applying the parking brake,
The worker gets off and pulls out the handle 66 (Figs. 17 and 18).
Set to "". Next, switch box 7 (FIG. 1)
From the "OFF" key switch S1
Turn to “ON” and perform the slide operation.
Turn to the position and hold. As a result, the slide
The cylinder 42 is extended, and the movable side member of the loading / unloading device 1 is
Slide to the right in the figure (FIG. 3). According to this slide
And the switch box 7 also moves to the right
Therefore, the operator also follows and walks. In this way, the operator
Walking by walking is a safety consideration such as operability and backward confirmation.
It is rather preferred in that respect. The size attached to the first support plate 4
When the pad 69 comes into contact with the stopper 3c (see FIG. 17).
), Slide stops, and at the same time slide lock device 6
No. 0 engaging pin 64 engages with the corresponding hole 3a.
Locked for both extraction and storage
You. Next, the operator sets the switch box 7.
The lift switch S2 is operated to "down".
As a result, the lift cylinder 20 starts to contract,
The arm 14 and the lower arm 9 rotate clockwise. FIG.
When the lower arm 9 lands on the ground as shown in
Stops, the descending operation is stopped. With this operation
The receiving table 29 is relatively pressed by the guide roller 48.
To separate from the link body 13 and not reach vertical
Then, it is in a slightly upright state. Next, the operator takes and holds 49 (FIG. 9).
And manually raise and rotate the receiving platform 29 further,
(Fig. 5). As a result, the main
The plate 30 is completely unfolded with respect to the link body 13.
It will be in a state where it was lost. In addition, when the loading operation of the loading table 29 is performed,
As mentioned above, the receiving platform 29 is slightly upright in advance.
Therefore, the burden of the force required for the operator is small. Then operate
Presses the push button 79 (FIG. 20) to
The securing state is released, and the sub-plate 31 is opened (FIG. 6).
Thus, when the receiving tray 29 is unfolded, the link 13
A receiving surface of a predetermined size that is linearly continuous from the upper surface 13a
Is configured to be in a state where luggage can be loaded. Where
The plates 34 and 35 are located between the ground and the
And stabilizes the receiving table 29. When the luggage has been placed on the loading tray 29, the ascending
Operation. As a result, first, the tilt operation described above is performed.
Then, the link body 13 and the receiving platform 29 are horizontal (FIG. 7).
Are indicated by two-dot chain lines. ). Further, the lift cylinder 20
When extended, the link body 13 and the receiving platform 29 are kept horizontal.
And rise to a height that matches the floor of the packing box 102.
(FIG. 7). Here, the worker transfers the luggage to the packing box 102.
I do. When unloading luggage from the packing box 102, the state shown in FIG.
6 to the state of FIG. 6 are performed in the reverse order. FIG. 6 shows a case where the loading tray lifting device 1 is stored.
, And the operator takes 49 (FIG. 9).
Then, the sub-plate 31 is folded. Simultaneously with folding
In addition, the sub-plate 31 is automatically secured,
Unless 79 (FIG. 21) is pressed, it will be folded
Maintained (FIG. 5). Next, the operator receives the folded
Lift the table 29 and lean it against the guide roller 48 (see FIG.
4). As a result, the receiving table 29 as a whole is
3 is folded to some extent. Sand
That is, the receiving surface, which is a continuous plane from the link body 13
Is also folded at the connection point between the link 13 and the receiving table 29.
It is in a state of being caught. Note that the receiving table 29 in the state shown in FIG.
The force required to lift the torsion
(FIGS. 13 and 14) assisted by the actual weight
Slightly lighter. Therefore, the degree of holding 49 with one hand
It can be easily erected by the force of. As described above, the state shown in FIG. 5 is changed to the state shown in FIG.
When changing, as described above, the tip 3
01a is disposed in the vicinity of the hinge 32, and the protrusion length is relatively small.
Because it is short, the turning radius of the folded loading table 29 is compact.
Can be Therefore, the rotation destination of the loading table 29
Enough between the end, that is, the tip portion 301a and the vehicle body 101
Distance is secured, and the interference between the receiving table 29 and the vehicle body 101
Can be prevented. In this way, check the size of the receiving surface
While keeping the folded loading tray 29,
Can be easily stored. Further, the state of FIG. 5 changes to the state of FIG.
When the receiving tray 29 is in contact with the hinge 27 and the receiving tray 29,
Turn around the pin 28 until it is about 90 degrees relative to each other.
And then pivot about pin 26. This pin 26
Are the pin 17 and the pin 12 which are the action points of the parallel link.
Are in separate locations. Therefore, the rotating loading table 29 is
4 when it comes closest to the rear of the body 102
The turning radius includes the depth of the upper surface 13a of the link body 13 (car
(The length in the front-rear direction of the body) is not included.
9 to the turning tip. As a result,
The moving radius is more compact, and the loading table 29 and the body 1
01 can be more reliably prevented. This
Here is a supplement about how compact it is
5 temporarily acts as a parallel link.
The same part as the link body 13 centering on the pin 17 which is a point
When it is rotated (without folding) together with the material
If the turning radius becomes extremely large,
Is clear. Next, the handle of the slide lock device 60
Operate 66 to set it to “store”. And the key
With the switch S1 kept “ON”,
I do. As a result, the upper arm 14 and the lower arm 9
It rotates in the counterclockwise direction, and the receiving table 29
Fall counterclockwise while rolling. Falling loading platform 2
9 is a switch mounting plate 36 as a stopper.
, The detection switch 37 is activated by the dog 38.
(Figure 3). When the detection switch 37 is activated, it rises
Is stopped, and the lift cylinder 20 is moved to the solenoid valve 86 (FIG. 1).
6) The oil supply state at that time is maintained by the check action
Is done. Subsequently, the slide cylinder 42 contracts.
Is automatically performed. When the slide cylinder 42 reaches the contraction end,
The movable side member of the loading / unloading device 1 is moved to a predetermined storage position.
When it reaches, the engagement pin 64 (FIG. 18) moves to the storage position hole 3b.
(Fig. 3) and the movable member is automatically locked.
You. In addition, the guide 33 provided on the
It engages with the drain 3. In this way, the loading table lifting device 1
The storage is completed and the vehicle is ready to run. Of the engagement pin 64
With the engagement, the loading / unloading device can be lifted and lowered even during vibration while traveling.
A situation where 1 is unintentionally pulled out is prevented. Also,
If the guide 33 and the slide rail 3 are engaged,
Even if there is an oil leak from the lift cylinder 20,
9 or the movable side members such as the arms 9 and 14
Absent. Further, the backing plate 35 made of an elastic body is
9 is in contact with the switch mounting plate 36
As a result, the receiving table 29 is stably supported by the lower arm 9.
To prevent rattling of the receiving platform 29 in the storage position.
Is done. Next, the position adjustment of the guide roller 48 will be described.
This will be described with reference to FIGS. Guide roller 4
The position 8 is, as described above, the guide roller support member 45.
It is possible to adjust by rotating.
FIG. 23 shows a vehicle height H1 higher than the vehicle height H0 of the vehicle shown in FIG.
FIG. In this case,
Clockwise from the position shown in FIG.
It is fixed to the lock member 44 while being shifted in the circumferential direction. This result
As a result, the guide roller 48 rotates clockwise around the pin 46.
And lower than the case of FIG. 4 and on the left side (front).
Go to This causes the guide roller 48 to lean
The inclined standing angle of the load receiving platform 29 with respect to the ground is shown in FIG.
It will be almost the same as the case. That is, the guide roller 4
By adjusting the position of 8, you can receive the cargo regardless of the vehicle height.
The inclination and upright posture of the table 29 can be maintained substantially the same.
You. Therefore, regardless of the vehicle height, the loading table 29 is tilted upright.
The force required to fall down from the state can be made approximately constant
Work is easy. Conversely, the receiving stand 29 is raised.
When leaning against the guide roller 48,
You can lean against it stably. The guide
The roller 48 rotates horizontally as described above,
Position adjustment in both the vertical and vertical directions
Have been. Maintain the tilt standing angle only by horizontal adjustment
When the operation is performed to store the receiving tray 29 from the state shown in FIG.
Possibility that the tip of the loading table 29 interferes with the rear part of the vehicle body 101
Therefore, it is not possible to perform vertical adjustment in this way.
Is preferred. In the above-described embodiment, the loading tray is raised and lowered.
The device 1 is assumed to be pulled out behind the vehicle body 101.
Although explained, even if it is a configuration pulled out to the side, the same
Can be applied to Further, the receiving table 29 in the above embodiment is used.
Is, as shown in FIG. 10 or FIG.
The tip portion 301a protrudes toward the sub-plate 31 when deployed.
The one end 311a of the supported portion 311 is
Although it is configured to hardly protrude from the end of the first end,
301a and one end 311a
About (or not to protrude)
Other configurations are possible. For example, the tip portion 301a and one
The ends 311a are respectively connected to the main plate 30 and the sub plate.
You may make it protrude from the edge part of the rate 31 equally. FIG.
Is a side view showing the receiving table 29 having such a configuration.
In FIG. 7A, a tip portion 301a of a support portion 301 is shown.
Project rightward from the right end position of the main plate 30
It is formed obliquely upward. On the other hand, the supported portion 311
One end 311a is located on the left of the left end of sub-plate 31.
It is formed to project obliquely downward. Support 30
1 and one end 311a of the supported part 311
Abut each other at a position below the center of the hinge 32. This
According to such a contact structure, the sub-plate 31 is folded.
(See (b)), the right end of the main plate 30
The protrusion length L1 of the distal end portion 301a from the
The protrusion of one end 311a from the right end position of the rate 31 to the right.
The output lengths L2 are substantially equal to each other. In this case, the protrusion
Since the length is evenly distributed to both sides, the folded receiving platform 29
10 or FIG.
It is more compact than in the case of the contact structure shown in FIG.
You. [0064] The present invention constructed as described above has the following advantages.
It works. According to the loading tray of claim 1, the support portion and the receiving portion
With the support structure by contact with the support, the tip of the support
And one end of the supported partDirectly belowPlace near
So that the receiving platform can be
The turning radius when turning and folding is compact.
can do. Therefore, the size of the receiving surface must be secured.
One can easily store the folded receiving tray
You. In addition, the shape of the tip of the support
More stable support of the other plate
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a loading tray lifting device using a loading tray according to an embodiment of the present invention. FIG. 2 is a side view of FIG. 1 with some parts omitted. FIG. 3 is a side view showing the loading tray elevating device in a state of being pulled out rearward. FIG. 4 is a side view showing the loading / lifting device in a state where the tip of the lower arm lands and the loading tray leans against a guide roller and stands upright. FIG. 5 is a side view showing the loading / unloading device in a state where the tip of the lower arm lands and the loading tray is folded down and laid down; FIG. 6 is a side view showing the loading / unloading device in a state where the loading tray is completely unfolded and along the ground. FIG. 7 is a side view showing an elevating operation of the loading tray elevating device. FIG. 8 is a diagram showing in detail the elevating operation of the loading tray elevating device. FIG. 9 is a bottom view of the unfolded loading tray in the loading tray lifting device. FIG. 10 is a side view showing the vicinity of a hinge of the loading tray in the loading tray lifting device. FIG. 11 is a side view showing the vicinity of a hinge of a loading tray according to another structure. FIG. 12 is a view of a hinge portion of the folded loading tray in the loading tray lifting device as viewed from the rear side of the vehicle. FIG. 13 is a cross-sectional view showing a hinge structure of a base of the loading tray in the loading tray elevating device, showing a standing state of the loading tray. FIG. 14 is a cross-sectional view showing a hinge structure of a base portion of the loading tray in the loading tray lifting device, showing the loading tray in a laid state. FIG. 15 is a view of a part of the loading tray elevating device as viewed from the rear of the vehicle. FIG. 16 is a hydraulic system diagram of the loading / unloading device. FIG. 17 is a side view showing a slide lock device of the loading tray elevating device. FIG. 18 is a horizontal sectional view and a vertical sectional view of the slide lock device. FIG. 19 is a side view showing a securing structure of the loading tray in the loading tray lifting device. FIG. 20 is a sectional view showing details of the securing structure, showing a state before securing. FIG. 21 is a sectional view showing details of the securing structure, showing a state after securing. FIG. 22 is a bottom view showing an engagement piece in the securing structure. FIG. 23 is a side view similar to FIG. 4, showing a state where the position of the guide roller is adjusted according to the vehicle height. FIG. 24 is a side view showing the vicinity of a hinge of a loading tray according to another structure. FIG. 25 is a side view showing a schematic structure of a conventional receiving tray. FIG. 26 is a side view showing a schematic structure of a conventional load receiving table and rotation during storage. FIG. 27 is a side view showing an unfolded state in a case where the protruding length of the support portion is shortened in the conventional receiving tray. [Description of Signs] 29 Loading table 30 Main plate 31 Sub-plate 32 Hinge 301 Support section 301a Tip section 311 Supported section 311a One end section 321, 322 Hinge pin

Claims (1)

(57) [Claims 1] The two plates are manually operated via hinges that are rotatable about respective rotary shafts.
In the receiving tray, which is connected to each other in a foldable manner, provided on one plate of the receiving tray, and the other plate side in a state where the receiving tray is expanded horizontally includes an end shape that is obliquely upward when viewed from the side. have a tip, and, this
The tip of the support portion is provided immediately below the hinge and the support portion is provided on the other plate of the loading tray, and the shape of the tip portion matches the shape of the tip portion on the one plate side when the loading tray is deployed horizontally. And a supported part having one end contacting the distal end.