JP2657524B2 - Opening / closing mechanism of the back door of a cargo box in a lorry - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (3-1) Industrial application field The present invention relates to a mechanism for opening and closing a rear door of a packing box in a truck having a high loading platform such as a so-called van truck, and particularly, to reduce the space required for opening and closing. The present invention relates to an opening / closing mechanism that enables the user to perform the operation.

(3-2) Prior Art Of the lorries, so-called vans are used to protect the luggage from wind, rain, dust, etc. and to avoid loss or theft of the luggage. Front view,
(B) is a rear view, (c) is a side view, and (d) is a plan view). The packing box has a closed structure, but has a large opening that is convenient for loading and unloading. It is desirable. In the vehicle shown in this figure, a double door (double door) is provided at the rear of the cargo box 2 of the lorry 1. (See (b) diagram). A cargo box of such a structure can load and unload cargo by directly contacting the rear part of the car with, for example, a warehouse, and the floor surface of the warehouse and the floor surface of the cargo box are almost flush with each other. There is an advantage.

However, since the front end of the door 3 draws a locus X as shown by the dashed line in FIG. 4 (d) when the door is opened and closed, the door 3 can be opened and closed when there is an obstacle in the fan-shaped portion surrounded by the dashed line. This is a drawback when handling cargo in narrow places.

Various attempts have been made to solve the above-mentioned drawbacks of the so-called double door. For example, what is shown in Japanese Utility Model Publication No. 63-7675 is to rotate the door about 90 degrees and then slide it to the side of the packing box to store it. It is enough if there is a space slightly wider than the width of the packing box, and the opening and closing mechanism is provided at the hinges provided at the top and bottom of the packing box, the upper guide rail provided at the top of the door, and at the bottom of the packing box. The lower guide rails are composed of rollers that run on those rails, so opening and closing operations are easy, and when stored in the side of the packing box, unnecessary swinging does not occur, so it is safe. However, when the weight of the door is heavy, the door may bend and the operation may not be smooth, and the configuration is complicated, the number of parts is large, and the manufacturing cost is increased. Did not.

The applicant of the present application has also made some proposals for this double door. For example, what is disclosed in Japanese Utility Model Application No. 62-147801 is based on a four-bar rotating chain. That is, the rear door and the vehicle body are connected by two links, the structure is simple and the operation is easy, and the space required for opening and closing the door is smaller than that of the conventional double door. However, it was larger than the case where the door was rotated 90 degrees and then slid to the side of the packing box, which was insufficient for the demand for reducing the space for operation.

(3-3) Problems to be Solved by the Invention The present invention eliminates the above-mentioned drawbacks of the conventional mechanism for opening and closing the rear door of a cargo truck, and does not require a very large space for opening and closing the door. The purpose of the present invention is to provide a mechanism for opening and closing the rear door of a cargo truck in which the width of the space is slightly larger than the width of the cargo box, the number of parts is small, and the opening and closing operation of the cargo car is smooth. .

(3-4) Means for Solving the Problems and Action Thereof The present invention relates to a cargo automatic operator characterized in that the rear door of the packing box is rotated about 90 degrees and then slid to the outside of the packing box and stored. The above-mentioned problem is solved by making the opening / closing mechanism of the packing box rear door as follows.
That is, it has a groove-shaped side rail attached to the upper outside of the rear of the packing box, a rear rail pivotally mounted to the upper end of the packing box by a hinge, and slides on the rear rail. Two rollers fitted as possible,
A bracket attached to the shaft of the roller, two links pivotally connected to the bracket and members attached to the packing box rear door, and a member attached to the packing box rear door. A vertical axis mounted via
The link has the same shape as the trajectory of the movement of the outer periphery of the vertical axis as the link pivots about the pivot with respect to the rear rail, has a groove engaged with the vertical axis, and has a load. And a guide plate attached to the box.

In this truck, there is only one hinge and two rollers in the opening and closing mechanism for the back door of the car box. The number of parts is small as a whole, and the rear door rotates along the guide plate, so the operation is smooth. The width of the space required for the operation is small, and is slightly larger than the width of the packing box.

(3-5) Example Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is an overall view showing an opening / closing mechanism of a rear box door of a truck according to the present invention, wherein (a) is a plan view, and (b).
Is a front view, (c) is a side view, and the left side in the traveling direction is a view showing a situation where the door is opened, and the right side is a view showing a situation where the door is closed. In the figure, a double door 3 is provided at the rear of a packing box 2 of a truck 1 called a van.
And an opening / closing mechanism 4 for opening and closing the door is provided on the left and right sides of the rear part.

FIG. 2 is a view showing details of an upper portion of one embodiment of the opening / closing mechanism of the rear box of the packing box according to the present invention, and FIG.
(B) is a front view, and FIG. 3 is a view showing details of a lower portion.
(A) is a front view, (B) is a view of the cross section taken along the arrow in (A) in the direction of the arrow, FIG. 4 (B) is a side view, and (A) is a view of (B) from above. FIG. 5 is a perspective view showing the entire opening / closing mechanism during the operation, and FIG. 6 is an enlarged perspective view showing details of a main part.

2 to 6, the opening / closing mechanism 4 of the rear box door is shown.
Is a groove-shaped side rail 11 provided on the outer upper part of the rear part of the packing box, a rear rail 13 rotatably mounted by a hinge 12 on the upper part of the rear end of the packing box, and fitted on the rear rail. Two rollers 14, the roller shaft 14 of the roller
A bracket 15 attached to A, two links 17 pivotally pivoted at one end to a bracket 16 at one end and pivotally attached to a member 16 fixed at the other end to the double door 3. , The vertical axis 1 attached to the door 3 via the member 18
9, a guide plate 20 mounted horizontally on the packing box and having a groove 20a engaged with the vertical axis, a spacer 21 mounted horizontally below the vertical axis and having a roller 21a at its tip, etc. Consists of

Hins 12 is attached to a packing box, and comprises a stator 12a composed of two plates each having a through hole, and an idler 12b composed of a channel material and a pipe material attached to one end of the stator. After aligning the core of the through hole with the core of the pipe material of the idler, the assembly is performed by inserting the pin 12c (see FIG. 5), and the rear rail 13 is attached to the idler 12b. I have. The rear rail has a shape in which a through groove is formed in the center of one surface of the square cylinder. The shape of the side rail 11 is also the same as the shape of the rear rail 13, so that when the rear rail is rotated 90 degrees around its pin 12C by the hinge 12, the cores of both rails coincide and their end faces abut each other. It consists of

The two links 17 are rotated by a suitable stopper (not shown) in association with each other by a predetermined angle. At one dead point, the door 3 is connected to the rear rail 13.
At a predetermined distance from the door (see FIG. 4 (a)), but at the other dead center, the door 3 is attached to the rear rail.
It hangs almost directly below 13 (see FIG. 2 (a)).
The groove 20a of the guide plate is formed by the vertical axis associated with the rotation of the link 17 from one dead center to the other dead center about the pivotal connection with the rear rail in a state where the rear rail 13 is rotated by 90 degrees. The groove 20a communicates with the outside at the position of the other dead center of the movement (see FIG. 6). In this example, the guide plate 20 is attached to two upper and lower locations.

The vertical shaft 19 is mounted such that when the link 17 is at the one dead center, the axis thereof coincides with the center of the pin 12C which is the center of rotation of the hinge. Also spacer 21
With the rear rail 13 rotated by 90 degrees and the link 17 at the other dead point, it is mounted so that it is orthogonal to the side wall of the packing box and its roller 21a contacts the side wall.

The opening / closing mechanism of the back door of the cargo box in the lorry according to the present invention described above operates as follows.

 First, the operation for opening the door will be described in order.

When the door is closed, the rotation angle of the rear rail 13 is 0.
The link 17 is at the position of one dead center, and the vertical shaft 19 is engaged with the guide plate 20 at the position of the starting point of the groove 20a (position A in FIG. 3 (b)).

Now, the lock mechanism 22 (see FIG. 4 (b)) between the rear door and the packing box is removed, and the door 3 is pulled forward (in the direction opposite to the traveling direction of the automobile).
, And the door 3 also rotates about the vertical axis 19. In this case, the rotation of the link 17 from one dead center to the other dead center is not performed because there is a phase difference of 90 degrees between the link 17 and the guide plate 2. The situation where the rotation of the rear rail 13 has reached 90 degrees is shown in a position B in FIG.

Then, when the door 3 is further pulled toward the outside (outside of the vehicle), the link 17 is rotated from one dead point to the other dead point, and the vertical shaft 19 relatively moves in the groove 20a of the guide plate. Slide. The situation where the link 17 has reached the other dead point is shown in the position C in FIG. In this state, the engagement between the vertical shaft 19 and the guide plate 20 is released, and the door 3 hangs almost directly below the rear rail.

Then push the door 3 in the direction of travel of the car,
14 travels along the rear rail and further along the side rail, and the door 3 is stored outside the packing box. This situation is shown in position D. In this state the spacer roller
Since 21a is in contact with the side surface of the packing box and prevents the link 17 from rotating from the other dead center to the one dead center, the door does not swing.

To close the door from the open state, the above procedure may be performed in the reverse order.

In the embodiment described above, the vertical shaft 19 is provided with the spacer 21 to prevent the swing in the housed state of the door. However, this may not be provided for a light door. In the above embodiment, the guide plate is mounted at two upper and lower positions. However, the guide plate may be mounted at one position or at three or more positions. The present invention can be effectively implemented in any of these cases.

(3-6) Effects of the present invention The present invention comprises an opening / closing mechanism for the rear door of a cargo box in a lorry comprising side rails, rear rails, rollers, links, and the like. By sliding and storing, the following excellent effects are exhibited.

The width of the space required for opening and closing the door can be made slightly larger than the width of the packing box.

Since the number of parts is small, the manufacturing cost can be reduced.

 Operation is smooth.

[Brief description of the drawings]

FIG. 1 is an overall view showing an opening / closing mechanism of a rear box door of a truck according to the present invention, wherein (a) is a plan view, (b) is a front view, (c) is a side view, and FIG. FIG. 3 is a diagram showing details of an upper portion of one embodiment of an opening / closing mechanism of a packing box rear door according to the invention,
(A) is a plan view, (B) is a front view, FIG. 3 is a view showing details of a lower part, (A) is a front view, and (B) is a cross-section taken along a line in FIG. 4, (b) is a side view, (a) is a view of (b) viewed from above, FIG. 5 is a perspective view showing the entire opening / closing mechanism during operation, and FIG. Is an enlarged perspective view showing the details of the main part, FIG. 7 ((a) is a front view, (b) is a rear view, (c) is a side view, and (d) is a plan view). FIG. 1 ... truck, 2 ... packing box 3 ... door, 4 ... opening and closing mechanism 11 ... side rail, 12 ... hinge 12a ... stator, 12b ... idler 12c ... pin, 13 ... ... Rear rail 14 ... Roller 14a Roller shaft 15 Bracket 16 Member 17 Link 18 Member 19 Vertical shaft 20A Guide plate 20a Groove 21 Spacer 21a: Roller, 22: Lock mechanism

Claims (1)

(57) [Claims] 1. A groove-shaped side rail mounted on an outer upper portion of a rear portion of a packing box, a rear rail rotatably mounted on a top portion of a rear end of the packing box by a hinge, and the rear rail. , Two rollers slidably fitted on the shaft, a bracket mounted on the shaft of the roller, and a member mounted on the bracket and the packing box rear door. Two links, a vertical axis attached to the rear box door via a member, and an outer periphery of the vertical axis as the link rotates about a pivotal connection to a rear rail. Having the same shape as the trajectory of the movement, having a groove engaged with the vertical axis, and comprising a guide plate attached to the packing box, after rotating the packing box rear door by about 90 degrees. Slide it out of the packing box and store it Closing mechanism of the packing box rear door in freight vehicles to symptoms.