JP3479011B2 - Side wall opening / closing device for mounting on vehicle bed - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading box for loading a vehicle loading platform mounted on a loading platform of a vehicle such as a freight car or a railway freight vehicle, and in particular, opening / closing a side wall surface made of a hood or a panel whose side wall surface is openable / closable. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, as a device of this kind, a device in which a side wall surface can be freely opened and closed by using a link mechanism, a latch mechanism, various springs or a hydraulic cylinder is generally used.

[0003]

However, in the above-mentioned conventional side wall surface opening / closing device for mounting a vehicle bed, the Japanese Patent Publication No. 8-5 is used.
As disclosed in Japanese Patent No. 321, No. 321, a pillar is provided in the center of the upper surface of the loading platform, a beam is provided between the pillars, and a pair of left and right wing panels are vertically rotated on the beam as a supporting member. It is pivotally attached so that both sides of the cargo bed can be opened and closed. Therefore, there is a problem in that a strong force (heavy opening operation) is required for the opening operation of the side wall surface, the weight is large, the configuration is complicated, and the cost is high.

The object of the present invention is to apply a weak force (light operation),
Alternatively, it is another object of the present invention to provide a side wall surface opening / closing device for mounting on a vehicle bed, which side wall surface can be opened by one switch operation, and which can be obtained with a simple and low cost structure.

[0005]

In order to achieve this object, the present invention provides a side opening / closing device for mounting on a vehicle bed, in which at least one of the left and right side wall surface bodies can be opened and closed with a straight line along the upper end thereof as a rotation axis. In front of each of the side walls
Later, respectively, the first gas spring and the second gas spring
A side wall face opening / closing mechanism configured by a ring is provided, and
The rear end of the fixed part of the first gas spring is attached to the left and right ceiling frames.
Pivotally support the rear end of the fixed part of the second gas spring.
The end of the expansion and contraction operation part of the first gas spring is pivotally supported on the pillar.
The end to the middle part of the expansion and contraction operation part of the second gas spring.
The shaft is supported, and the tip of the expansion / contraction operation part of the second gas spring is attached.
The side wall surface member is axially supported above the widthwise end portion, and when the side wall surface member is in a closed state, the expansion and contraction operation portions of both gas springs both hold a static state, and the expansion and contraction operation of at least one of the gas springs. When an external force such that the portion exceeds the dead point is applied to the side wall surface body and is initially rotated about the rotation shaft as a fulcrum by a predetermined angle, after that, both the expansion and contraction operation portion of both gas springs and the rotation of each shaft support portion of the fixed portion are both rotated. With the cooperation of the extension and contraction of the expansion and contraction operating part, both expansion and contraction operating parts extend to the expansion limit without external force or with a slight external force to open and rotate the side wall surface body to open and close the open and close side surface. as eggplant
It is characterized by having done.

Furthermore, in order to achieve the object described above, the present invention is, at least either the left or right side wall tetrahedron in openable vehicle cargo bed mounting side switchgear as a rotational axis line along its upper end, the side wall face piece Before and after each of it
Each consists of a hydraulic cylinder and a gas spring.
A side wall face opening / closing mechanism is provided to fix the hydraulic cylinder.
The rear end of the gas is supported by the ceiling frame on the left and right sides,
The rear end of the fixed part of
Attach the tip of the expansion / contraction operating part to the expansion / contraction operating part of the gas spring.
It is axially supported in the middle part of the expansion and contraction operation part of the gas spring.
The tip is pivotally supported above the widthwise end of the side wall body, and when the side wall body is closed, both the hydraulic cylinder and the expansion / contraction operating part of the gas spring maintain a stationary state, and the hydraulic cylinder starts operating. to the expansion and contraction operation of the telescopic actuating portion extend out gas spring also out elongation, then the hydraulic Siri
The expansion and contraction operation parts of the spring and the gas spring and the pivotal support parts of the fixed parts cooperate with the extension of the expansion and contraction operation parts so that the expansion and contraction operation parts extend to the extension limit and the side wall is formed. so as to form the opening and closing side continue to open rotating the facepiece and opened
Characterized in that the.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a schematic side view showing an embodiment of a side wall surface opening / closing device for loading a vehicle bed according to the present invention mounted on a freight vehicle, and FIG. 2 is a schematic plan view of the same. In FIGS. 1 and 2, 100 is a side wall surface opening / closing device according to the present invention, and 200 is a freight vehicle equipped with the side wall surface opening / closing device 100.

In the side wall opening / closing device 100, four columns 11 to 1 are provided upright at positions corresponding to the corners of a quadrangle.
4 and four ceiling frames 15 to 18 which are laterally bridged between the columns 11 to 14, front and rear surfaces 19 and 20, left and right side surfaces 21, 2
2 and the ceiling surface 23 are formed.

Further, in the side wall surface opening / closing device 100, at least one side surface 21 or 22 of the left and right side surfaces 21, 22 is
Here, the columns 11, 12, 13, 1 are provided on both side surfaces 21, 22.
The side surface 2 is rotatable about a straight line along the front and rear side ceiling frames 17 and 18 which are horizontally mounted between the four as a rotation axis (virtual axis).
It is provided with side wall face bodies 24, 24 for opening and closing 1, 22.

The side wall face 24 is composed of a lightweight panel or a hood or the like having a reinforcing frame provided at an appropriate portion. Here, the side wall surface body 24 that can be folded in two at the intermediate portion in the vertical direction is illustrated, but the present invention is not limited thereto. It may be in the form of a flat plate (unfoldable) or may be folded in three so that it can be folded at two intermediate portions in the vertical direction.

As described above, in the side wall surface opening / closing device 100, at least one of the left and right side wall surface bodies 24, here both the left and right side wall surface bodies 24, 24 can be freely opened and closed by using a straight line along the upper end thereof as a rotation axis (virtual axis). is there. Each side wall face 24 is
Both end sides in the width direction of the side wall face member 24 (on the side of the columns 11 and 12;
The side wall face opening / closing mechanism 25 provided on each of the columns 13 and 14) is openable / closable, and each side wall face opening / closing mechanism 25 has two first and second gas springs 25a, 2a.
5b.

The side wall face opening / closing mechanism 25 will be described in detail below with reference to FIGS. 3 and 4. FIG. 3 shows the configuration of the side wall face opening / closing mechanism 25, here, of the side wall face body opening / closing mechanism 25 that opens / closes the side wall face body 24 of the side wall face opening / closing device 100, the side wall face body opening / closing mechanism on the left side in the width direction of the side wall face body 24 (the column 11 side). 25 is an explanatory view of the configuration of FIG. 25, and FIG. 4 is an enlarged perspective view showing a main part of the side wall face opening / closing mechanism 25 in FIG.

In the side wall face opening / closing mechanism 25, when the side wall face body 24 is closed, the expansion / contraction actuating portions 25a1 and 25b1 of both gas springs 25a and 25b are held stationary (see position a in FIG. 3). , When at least one of the gas spring expansion / contraction operating parts 25a1 and 25b1 exceeds the dead point thereof, an external force is applied to the side wall surface member 24, and when the rotary shaft (virtual shaft) is initially rotated by a predetermined angle, the following operation is performed. Is configured to work.

That is, when the above-mentioned initial rotation is carried out, the expansion / contraction operating portions 25a1 and 25b of both gas springs 25a and 25b.
1 and the fixed portions 25a2 and 25b2 rotate together with the shaft support portions and the extension and contraction operation portions 25a1 and 25b1 extend, so that the extension and contraction operation portions 25a can be operated without an external force or with a slight external force.
1, 25b1 extend to the extension limit to open and rotate the side wall face body 24 (see arrows A to C), and the open / close side face (left side face 21) is opened (position B, position B in FIG. 3). 4 and position C in FIG. 4).

Specifically, the first gas spring 25a
The rear end of the fixed portion 25a2 is pivotally supported by the left and right lateral ceiling frames 15. And the second gas spring 25b
The rear end of the fixed portion 25b2 is pivotally supported by the column 11, the tip of the expansion / contraction operation portion 25b1 is pivotally supported above the widthwise end portion of the side wall surface member 24, and the intermediate portion of the expansion / contraction operation portion 25b1 is provided with First gas spring expansion / contraction operating portion 25a1
The tip of is pivotally supported.

Next, the operation will be described. First, in the resting state in which the side wall face member 24 is closed (see position a in FIG. 3), the gas springs 25a and 25b are not connected to the side wall face member 2.
4 is balanced at a position where it is not biased clockwise in FIG. 3, so this rest state is maintained. At this time, since the side wall surface member 24 is locked by the hooking device (not shown), even if the external force in the clockwise direction is erroneously applied to the side wall surface member 24, the gas springs 25a and 25b do not operate.

From the rest state, when the hook is removed and the lower portion of the side wall surface member 24 is pulled slightly toward the front (to the left in FIG. 3), the expansion / contraction operating portions 25a1 and 25b1 of the gas springs 25a and 25b extend therefrom. Gas spring 2 started
5a is in the direction of arrow A in FIG. 4, and the gas spring 25b is in the direction of arrow B in FIG. 4, with biasing forces acting to open the side wall face member 24 in the direction of arrow C (clockwise direction) in FIG. start.

When the side wall face 24 is fully opened by the biasing force of the gas springs 25a and 25b, the extension of the gas spring expansion / contraction actuating portions 25a1 and 25b1 reaches the limit, and the operation is stopped there, and the side wall face 24 remains stationary in the fully open state. (See position C in FIGS. 3 and 4).

When the side wall face 24 is closed, a string (not shown) tied to the side wall face 24 is pulled downward to drive the gas springs 25a and 25b in the direction opposite to the direction in which the gas springs 25a and 25b are opened. It may be returned to the rest state and locked by the above-mentioned hook (not shown). A ratchet may be provided instead of the latch to hold the side wall surface member 24 in a resting state. In this case, once ratchet
When the turning operation is performed, the holding of the side wall face body 24 in the rest state is released.

FIGS. 5 and 6 are views showing the construction of the main part of another embodiment of the side wall face opening / closing mechanism 25 from the rear side. FIG. 5 shows a rest state and FIG. 6 shows an open state. 5 in both figures
Reference numeral 5a is a hydraulic cylinder, 55a1 is a telescopic operating portion of the hydraulic cylinder 55a, and 55a2 is a fixed portion thereof. In addition, in FIGS. 5 and 6, the same reference numerals as those in FIGS. 3 and 4 indicate the same or corresponding portions.

Here, an example is shown in which the gas spring 25a in the above embodiment is replaced with a hydraulic cylinder 55a. Specifically, the hydraulic cylinder 55 a has a rear end of a fixed portion 55 a 2 pivotally supported by the left and right side ceiling frames 15, and a tip end of the expansion / contraction actuating portion 55 a 1 is pivotally supported by the side wall face member 24. . And, the gas spring 25b is the support 1
1, the rear end of the fixed portion 25b2 is pivotally supported, and the tip end of the expansion / contraction actuating portion 25b1 is pivotally supported above the widthwise end portion of the side wall face member 24. That is, in the closed state (rest state) of the side wall face member 24 shown in FIG. 5, both the expansion and contraction operation portions 25b of the gas spring 25b and the hydraulic cylinder 55a.
1, 55a1 both hold a stationary state (in FIG. 5,
See position a).

Next, when the hydraulic cylinder 55a starts operating and the expansion / contraction operating portion 55a1 thereof extends, the gas spring expansion / contraction operating portion 25b1 also extends. After that, both expansion / contraction operation parts 55a1 and 25b1, the gas spring 25b, and the rotation of each shaft support part of both fixed parts 25b2 and 55a2 of the hydraulic cylinder 55a and the extension of both expansion / contraction operation parts 25b1 and 55a1 cooperate. The expansion / contraction operation parts 25b1 and 55a1 extend to the extension limit thereof to open and rotate the side wall face member 24 to open and close the open / close side surface (see position C in FIG. 6). The operation of the hydraulic cylinder 55a can be automatically operated by a driving unit (not shown) provided in the driver's seat or the front part of the loading platform.

[0023]

As described above, according to the present invention, the side wall face opening / closing mechanism 25 is provided with the two gas springs 25a and 2a.
5b or one hydraulic cylinder 55a and one gas spring 25b, so with a weak force (light operation),
Alternatively, there is an effect that it is possible to provide a side wall surface opening / closing device for mounting on a vehicle bed that can open the side wall surface by a single switch operation and that can be obtained with a simple and low-cost structure.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a side wall opening / closing device according to the present invention.

FIG. 2 is a schematic plan view of the same.

FIG. 3 is an explanatory diagram of a configuration of a side wall face body opening / closing mechanism in FIGS. 1 and 2.

FIG. 4 is an enlarged perspective view showing a main part of the side wall surface opening / closing mechanism in FIG.

FIG. 5 is a view showing a configuration of a main part of another embodiment of the side wall face opening / closing mechanism from the rear side.

FIG. 6 is a view showing the configuration of the main part of another embodiment from the rear side.

[Explanation of symbols]

100 Side wall opening / closing device 11-14 props 15-18 Ceiling frame 19, 20 front and back 21, 22 left and right side 23 Ceiling surface 24 Side wall face piece 25 Side wall opening / closing mechanism 25a, 25b First and second gas springs 25a1 and 25b1 Gas spring expansion / contraction operation unit 25a2, 25b2 Gas spring fixing part 55a hydraulic cylinder 55a1 Hydraulic cylinder expansion / contraction operating unit 55a2 Hydraulic cylinder fixed part 200 lorry

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05F 3/02 E05F 15/00-15/20 B60J 7/08 B60J 5/04 B62D 33/04

Claims (2)

(57) [Claims] 1. A side wall surface member ( 2
4, 24 ) is a side surface opening / closing device for mounting a vehicle bed, which is openable / closable with a straight line along the upper end thereof as a rotation axis , in front of and behind each of the side wall bodies (24, 24).
The first gas spring (25a) and the second gas spring
Side wall face opening / closing mechanism (2
5) is provided, and the fixing portion (25a) of the first gas spring (25a ) is provided.
2) Support the rear end on the left and right side ceiling frames (15, 16).
And, the fixing portion of the second gas spring (25b) (25b
2) Shaft the rear end to the column (11 or 13, 12 or 14)
Stretching operation of supporting, and the first gas spring (25a) (25
a1) to the extension of the second gas spring (25b).
The expansion / contraction operation part (25) of the second gas spring (25b) is axially supported by the intermediate part of the compression operation part (25b1).
b1) the end in the width direction of the side wall surface body (24, 24)
Rotatably supported in part upper part, the side In the closed state of the wall body both gas springs (2
5a, 25b ) both of the expansion / contraction operation parts ( 25a1, 25b1 ) maintain a stationary state, and an external force of at least one of the expansion / contraction operation parts of the gas springs exceeds the dead point thereof is applied to the side wall surface member to rotate the rotary shaft. After the initial rotation by a predetermined angle as a fulcrum, thereafter , the expansion and contraction operation parts ( 25a1 , 25b ) of both gas springs ( 25a, 25b ).
1 ) and the fixed parts ( 25a2, 25b2 ) rotate together with the pivotal support parts and the extension and contraction of both expansion and contraction operation parts cause the expansion and contraction operation parts to reach their extension limits without an external force or with a slight external force. It went the sidewall tetrahedron open rotation to go off side vehicle loading platform for mounting side wall switchgear, characterized in that was to form the open state. 2. A side wall surface body ( 2
4, 24 ) is a side surface opening / closing device for mounting a vehicle bed, which is openable / closable with a straight line along the upper end thereof as a rotation axis , in front of and behind each of the side wall bodies (24, 24).
The hydraulic cylinder (55a) and the gas spring (25
b) a set of configuration sidewalls facepiece opening and closing mechanism (25) by
Only after the fixed part of the hydraulic cylinder (55a) (55a2)
The ends are pivotally supported on the left and right side ceiling frames (15, 16), and the fixed portion (25b2) of the gas spring (25b) is fixed.
The rear end of the hydraulic cylinder (55a) is pivotally supported by the support column (11 or 13, 12 or 14), and the expansion and contraction operation section (55a1) is provided.
The distal end of the gas spring (25b) expansion and contraction operation part
(25b1) is pivotally supported at an intermediate portion of the gas spring (25b) to extend and retract (25b).
1) is the end of the side wall face body (24, 24) in the width direction.
Rotatably supported in the upper portion, the side wall member hydraulic cylinder In the closed state of the (5
5 ) and the expansion / contraction operation part ( 55 ) of the gas spring ( 25b ) .
a1, 25b1 ) both remain stationary, the hydraulic cylinder ( 55 ) starts operating, and its expansion / contraction operation part ( 55a1 ).
Extension of the gas spring ( 25b1 )
Also extends, and after that, both expansion and contraction operation parts ( 55a1, 25b ) of the hydraulic cylinder ( 55 ) and the gas spring ( 25b ).
1 ) and both fixed parts ( 55a2, 25b2 ) pivoting of each shaft support part and the extension and contraction of both expansion and contraction operating parts cooperate to extend and contract both expansion and contraction operating parts ( 55a1, 25b1 ) to its extension limit. it has an opening and closing side continue to open rotating the side wall face piece so as to form an open state Te vehicle loading platform for mounting side wall switchgear according to claim.