JP4346802B2 - Opening and closing device for packing box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a canopy opening / closing device for a packing box that opens and closes a canopy for preventing scattering of a load loaded on the packing box.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, many canopy opening / closing devices for a packing box are provided in which a canopy covering an upper opening of a packing box is provided so as to be openable / closable with respect to the upper opening of the packing box by an opening / closing means.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned conventional one, if the total length of the packing box is increased, the total length of the canopy is correspondingly increased and the weight of the canopy itself is increased. As a result, a large torque is required for the drive device that constitutes a part of the opening / closing means for opening and closing the canopy, resulting in an increase in the size of the device, and when the torque is insufficient, the canopy cannot be opened and closed smoothly. was there.
[0004]
As a specific example of the canopy opening and closing device, a canopy support arm is provided on the front and back of the packing box so as to be rotatable around its base end, and the front and back sides of the canopy support arm are connected to the front and rear sides of the canopy support arm. In some cases, the canopy support arm is rotated by a driving device to open or close the canopy.
[0005]
However, in the case where only one of the canopy support arms is rotated by the driving device to open and close the canopy, when the canopy starts to open and close, twisting occurs before and after the canopy, thereby being connected to the driving device. There was a problem that the rotation of the canopy support arm that was not driven was delayed, and the canopy could not be opened and closed smoothly. This means that the longer the overall length of the canopy, the greater the twist and the more obstructing the opening and closing of the canopy.
[0006]
The present invention has been made in view of the above problems, and the object of the present invention is to suppress the occurrence of torsion as much as possible even with a long canopy and to smoothly open and close it, and the torque of the driving means is insufficient. It is an object of the present invention to provide a canopy opening / closing device for a packing box which can eliminate the problem and reduce the size of the driving means.
[0007]
[Means for Solving the Problems]
A canopy opening / closing device for a packing box according to a first aspect of the present invention is a canopy opening / closing device for a packing box comprising a canopy covering an upper surface opening of the packing box and an opening / closing means for opening / closing the canopy with respect to the upper surface opening of the packing box. , the switching means is coupled to the front and rear one side edge of the tip the canopy has a pair of canopy support arm front and rear base end portion is rotatably supported, the top panel lid supporting at closing start of the top cover A spring for assisting the operation of the arm is provided in parallel with the canopy support arm as viewed from above and along the canopy support arm, and the spring can be rotated most when the canopy support arm rotates. When the upper surface opening is closed or opened, the tension is set to be maximum.
[0008]
A canopy opening / closing device for a cargo box according to a second aspect of the present invention is characterized in that the opening / closing means includes a driving means that is provided on one of the front and rear canopy support arms and rotates the canopy support arm. The spring is provided along the other canopy support arm.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
1 to 3 show a canopy opening / closing device for a packing box according to the present invention.
[0011]
In the figure, reference numeral 1 denotes a packing box. In this embodiment, the packing box 1 is a container that can be loaded and unloaded on a vehicle.
[0012]
The cargo box 1 is a box whose upper surface is opened, and a locking member 11 (see FIGS. 1 and 3) that can be engaged and disengaged with an unloading arm (not shown) mounted on the vehicle is provided on the front surface thereof. By locking the unloading arm to the locking member 11, the cargo box 1 can be unloaded between the ground and the vehicle by the operation of the unloading arm. Further, the rear surface 12 of the packing box 1 can be freely opened and closed, and a pair of left and right support legs 13 are provided at the front and a pair of left and right support rollers 14 are provided at the rear as shown in FIG.
[0013]
A pair of left and right canopies 2, 2 are disposed in the upper surface opening of the packing box 1 so as to be freely opened and closed by opening / closing devices 3, 3 as opening / closing means. These switchgears 3 and 3 have the same configuration corresponding to each canopy 2 and 2 and are provided on the left and right sides. The same reference numerals are given and description thereof is omitted.
[0014]
The opening / closing device 3 includes a pair of front and rear canopy support arms 31 and 32 disposed in parallel with the canopy 2 before and after the canopy 2, and a drive motor 33.
[0015]
The canopy support arms 31 and 32 are arranged before and after the canopy 2 from the inner end edge 2a of the canopy 2 toward the outer end edge, and the base end portions 31a and 32a arranged closer to the outer end edge are the cargo boxes 1. The front end portions 31b and 32b are pivotally supported by support shafts 21 and 22 protruding forward and backward from the inner end edge 2a of the canopy 2.
[0016]
The drive motor 33 has an output shaft 33a integrally connected to a base end portion 31a of one canopy support arm 31 disposed in front of the cargo box 1 on the left side in FIG. The canopy 2 is opened and closed by rotating the canopy support arm 31 left and right around the base end 31a by rotational driving in the reverse direction. In other words, one canopy support arm 31 is on the driving side and the other canopy support arm 32 is on the driven side and rotates in the same direction, and the canopy 2 is opened and closed by this rotation.
[0017]
Here, the opening / closing device 3 is provided with a spring 35 as auxiliary means on the other canopy support arm 32 on the driven side. The spring 35 is stretched outside the canopy support arm 32 in parallel with the canopy support arm 32.
[0018]
Specifically, one end of the spring 35 is fixed to the support shaft 22 protruding from the distal end portion of the canopy support arm 32, and the other end of the spring 35 is provided near the base end portion 32 a of the canopy support arm 32. It is fixed to the fixed fixing member 36. The fixing member 36 is provided with adjusting means (not shown) that can adjust the tension of the spring 35 by changing the screwing amount of, for example, a bolt.
[0019]
The spring 35, when the canopy support arm 32 canopy 2 the most rotated to the left or right side are closed or opened upper opening of packing box 1, the tension is set to be maximized.
[0020]
Next, the operation of the packing box canopy opening / closing device configured as described above will be described.
[0021]
First, as shown in FIG. 2, in a state where the canopies 2 and 2 are arranged at a closed position that closes the upper surface opening of the cargo box 1, the drive motor 33 is driven to rotate and the canopy support arm 31 faces outward. When the canopy support arm 31 is rotated, the canopy support arm 32 connected to the canopy support arm 31 through the inner end edge 2a of the canopy 2 is interlocked and rotated outward. 2 is arranged at an open position where it is suspended along the side wall of the packing box 1 while drawing a locus as shown by a two-dot chain line in FIG.
[0022]
Then, by rotating the canopy support arm 31 in the reverse direction by the drive motor 33 from the open position, the canopy support arm 31 is disposed at the closed position by the reverse operation.
[0023]
Here, when the opening and closing of the canopy 2 described above is started, the canopy support arm 32 on the driven side starts to rotate while being supported by the tension of the spring 35, thereby the canopy. 2 will open and close smoothly.
[0024]
That is, when the total length of the canopy 2 is long, twisting occurs before and after the canopy 2 without the assistance of rotation by the spring 35, which obstructs the opening and closing of the canopy 2. By assisting the rotation of 32 and following the rotation of the canopy support arm 31, the twist of the canopy 2 can be suppressed as much as possible, and the canopy 2 can be opened and closed smoothly.
[0025]
Further, by assisting the rotation start operation by the spring 35, the torque shortage of the drive motor 33 is also eliminated, and the drive motor 33 can be reduced in size.
[0026]
【The invention's effect】
As described above, according to the canopy opening / closing device of the packing box of the present invention, the opening / closing means for opening / closing the canopy with the spring at the start of opening / closing of the canopy is supported, so that the twisting before and after the canopy is suppressed as much as possible. The canopy can be opened and closed smoothly. Further, by assisting the opening / closing start operation of the canopy with the spring, the shortage of torque of the driving means is also eliminated, and the driving means can be downsized.
[Brief description of the drawings]
FIG. 1 is a plan view showing a canopy opening / closing device for a packing box according to the present invention;
FIG. 2 is a rear view showing a canopy opening / closing device for a packing box according to the present invention;
FIG. 3 is a side view showing a canopy opening / closing device for a packing box according to the present invention.
[Explanation of symbols]
1 Packing box 2 Canopy 3 Opening / closing device (opening / closing means)
31 One canopy support arm 32 The other canopy support arm 33 Drive motor (drive means)
35 Spring (auxiliary means)

Claims (2)

A canopy opening / closing device for a packing box comprising a canopy covering an upper surface opening of the packing box and an opening / closing means for opening / closing the canopy with respect to the upper surface opening of the packing box. is connected to the front and rear, a pair of canopy support arm front and rear base end portion is rotatably supported, the spring is the canopy support as viewed from above to assist the operation of the top lid support arm at closing start of the top cover The spring is provided parallel to the arm and along the canopy support arm, and the spring maximizes the tension when the canopy support arm rotates most and the canopy closes or opens the top opening of the cargo box. A canopy opening and closing device for a packing box, characterized in that it is set to be. The opening / closing means includes driving means provided on one canopy support arm of the pair of front and rear canopy support arms and rotating the canopy support arm, and the spring is provided along the other canopy support arm. The canopy opening and closing device for a packing box according to claim 1.

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