JP2558533B2 - Packing box opening / closing device for vehicles such as trucks - Google Patents

Description

TECHNICAL FIELD The present invention relates to a luggage box opening / closing device for vehicles such as trucks.

[Conventional technology]

When loading luggage from above a conventional truck packing box, as shown in FIG. 5, a ceiling a and a part of a side wall b are opened and closed by an L-shaped opening and closing rod c,
A device that opens and closes in the lateral direction as shown in FIG. 6 is used. Further, as shown in FIG. 7, front and rear through shafts h ₁ and h ₂ are connected to the left and right ends of the connecting beam i at the upper ends of the left and right columns e and f of the loading platform d, and are provided on the through shafts h ₁ and h ₂ . Ceiling frame g ₁ , g ₂
The cargo is loaded from above by opening and closing.

[Problems to be Solved by the Invention]

The one shown in FIG. 5 is one in which the lower ends of both columns e of the gate-shaped frame d provided in front of and behind the cargo bed are pivotally attached, and the opening / closing part h is pivotally attached to the upper ends thereof. By opening and closing in a V shape, the ceiling a and the side wall b are opened and closed at the same time.

Also, what is shown in FIG. 6 is the improved type of FIG.
A support shaft g of an L-shaped member c is provided from the center of the pillar e of the gate-shaped frame d to the lower end of the support, and the support shaft g is used as a fulcrum to open and close in an inverted C-shape. Although the ceiling of the truck packing box is opened and closed, both of them have a large ceiling and side wall at the same time, so it is extremely inconvenient to use in a narrow space and the opening and closing part is a vehicle. Since it is carried out at the upper part of the vehicle, the center of gravity moves to the upper part when opened, and it is apt to contain the wind, which causes a drawback such as fear of falling.

Further, in the device shown in FIG. 6, since the connecting beams i on the front and rear of the loading platform d are fixed, the widths of the left and right front and rear penetrating shafts h ₁ and h ₂ connected thereto are fixed, It is impossible to fully load the cargo bed because the left and right front and rear penetration axes h ₁ and h ₂ interfere with each other. As described above, each of the above-mentioned devices is complicated in structure and has various drawbacks.

The present invention is intended to solve the various problems described above.

[Means and Actions for Solving the Problems]

This invention has been made in view of the above points,
Each strut of the portal frame has a double structure, one end of the hydraulic cylinder is fixed in the strut, the lower end of the inner box is pivotally attached to the other end, and the upper end bearing part has outer pulleys at both front and rear ends, and hydraulic pressure. The wire rope fixed to the upper end of the side door frame is constructed by pivotally connecting the front and rear penetrating shafts equipped with the expandable left and right connecting beams with a built-in cylinder, the inner pulley, the side door frame and the ceiling frame, and the spring coaxially. The other end is fixed to the portal frame column via the inner pulley. The wire rope fixed to the connecting beam on the front left side has one end fixed to the connecting beam on the rear left side through the pulleys on the front right outside pulley and the pulleys on the both ends of the center connecting beam and the rear right outside pulley, Furthermore, the wire rope fixed at one end to the front right connecting beam is fixed to the rear right connecting beam at the other end through the pulleys provided at both ends of the left outer pulley and the center connecting beam and the rear left outer pulley, A device that opens and closes the ceiling and side doors by the expansion and contraction of the hydraulic cylinders in the left and right connecting beams and in the portal frame. The hydraulic cylinders are built in the columns of the portal frame and the front and rear connecting beams, respectively. By the action, the ceiling member is pushed up to the upper part, at the same time, the ceiling and the side door are opened, and further, the width of the front and rear penetrating shaft is widened to the left and right, and at the same time, the ceiling and the side door are opened. Since over loading by loading and Fokurifuto from above by emission operations can also be easily performed, yet extended to laterally equalized, the position of the vehicle center of gravity is not moved from the center,
There is no danger of falling due to the influence of the wind, there is no need for a fall prevention device such as an outrigger, and it is possible to safely perform loading work from above even in a narrow space.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. Referring to FIGS. 1 to 4, each column 2 of the gate-shaped frame 1 has a double structure, a hydraulic cylinder 3 is provided in each outer box 2, and one end 3a of the cylinder 3 is provided in the outer box 2. The lower end 4a of the inner box 4 is pivotally attached to the other end 3b, and the outer pulley 5a and the connecting beam are connected to the bearing 4b at the upper end of the inner box.
6, an inner pulley 7, a ceiling frame 8, a front and rear penetrating shaft 10 provided with a spring 9, etc. are pivotally mounted, and the connecting beam 6 has a double structure with an outer box 6a on the left side and an inner box 6b on the right side coupled beams 6a, internal hydraulic cylinders 11a, 11b is within 6c of one end 11a ₁ of the cylinder on the left side connecting beam 6a, the other end 11a ₂ operates telescopically to the right and left engaged with the right side connecting beam 6b . Then, one end of the wire rope 13 fixed to the fixed shaft 12a at the lower center of the left connecting beam 6a includes a front right outer pulley 5a, pulleys 16a and 16b provided at both ends of the right central connecting beam 15a, and a rear right pulley 5d. It is fixed to the fixed shaft 12c at the lower middle stage of the rear left connecting beam. Also, the wire rope 14 facing this,
One end of which is fixed to the fixed shaft 12b at the lower central stage of the right connecting beam 6b, and the rear left outside pulley 5c is provided via the pulleys 16c and 16d and the rear left outside pulley 5c provided at both ends of the left center connecting beam 15a. The right connecting beam 6d is fixed to the fixed shaft 12d at the lower middle stage of the center. The wire rope 17 engaged with the inner pulley 7 adjacent to the ceiling frame 8 has one end fixed to the fixed shaft 19 of the side door 18 and the other end fixed to the fixed shaft 20 of the gate frame strut 2 It is an opening and closing member. Furthermore, the front and rear penetrating shaft 10
The spring 9 that engages with the ceiling frame 8 is always pressed in the direction in which the ceiling 8 is closed.

Since the present invention is configured as described above, when each hydraulic cylinder 3 in the column outer box 2 extends, the inner box 4 rises as shown by the two-dot chain line in FIG. By the extension of the hydraulic cylinders 11a, 11b of 6a and 6b, 6c and 6d, the left and right front and rear penetrating shafts 10a, 10b are expanded outward, and the outer pulleys 5a at both ends provided on the penetrating shafts 10a, 10b are expanded.
The pulleys 5d and 5b, 5c and the inner pulleys 7a and 7d, 7b and 7c are also pushed outward. As a result, the wire rope 13 is fixed at both ends 12a, 12c via the pulleys 5a, 16a, 16b, 5d, respectively.
Since both ends of the wire rope 14 are fixed to the fixed shafts 12b and 12d through the pulleys 5b, 16c, 16d and 5c, the wire ropes 13 and 14 in the shape of a zelkova bar have a degree of freedom. The wire ropes 13 and 14 become a force for pulling the ceiling frames 8a and 8b upward, and the ceiling frame 8 is opened with the front and rear penetrating shafts 10a and 10b as the axis as shown by the two-dot chain line in FIG.

At the same time, one end is fixed to the upper fixed shaft 19 of the side door 18 and the other end is fixed to the fixed shaft 20 at the upper end of the gate frame 1 through the inner pulleys 17 provided on the through shafts 10a and 10b. Since the wire rope 7 is strongly pulled by the extension of each hydraulic cylinder, the tension releases the side door frame 18 to the upper left and right respectively.

When closing the ceiling frame 8 and the side door frames 18a, 18b, each hydraulic cylinder 3a, 3b, 3c, 3d and 11a, 1
When 1b is contracted, the ceiling frame 8 is actuated by the spring 9, so that the side door frames 18a, 18b are moved to the hydraulic cylinders 3a, 3b, 3c,
3d can be closed by each operation.

〔The invention's effect〕

The present invention is made as described above in detail, and by the expansion and contraction action of each hydraulic cylinder incorporated in each strut and connecting beam of the gate type frame and the action of the wire rope stretched like a zelkova through each pulley, Since the average force is distributed and applied to each pulley, the weak ceiling member is not deformed, and the ceiling frame and the side door frame are smoothly opened and closed. In fact, the inner stanchions are pushed up a little and the left and right front and rear penetration shafts are pushed to the left and right, so there is no change in the center of gravity of the vehicle,
Since it is less affected by wind, it is possible to safely carry out loading work from above.
The device is extremely simple, the manufacturing cost thereof is low, and the device is economical.

[Brief description of drawings]

1 shows an embodiment of the present invention. FIG. 1 is a partially cutaway front view, FIG. 2 is an enlarged plan view in which a part of FIG. 1 is omitted, and FIG. 3 is an enlarged front upper part of FIG. FIG. 4 is an enlarged view of the upper side surface of FIG. 1, and FIGS. 5 to 7 are explanatory views showing a conventional one. 1 ... Gate-type frame, 2 ... Post outer box, 3 ... Hydraulic cylinder, 4 ... Inner box, 5a, 5b, 5c, 5d ... Outer pulley, 6a, 6c
...... Left side connecting beam, 6b, 6d …… Right side connecting beam, 7 …… Inner pulley, 8 …… Ceiling frame, 9 …… Spring, 10a, 10b
...... Front and rear through shafts, 11a, 11b ...... Hydraulic cylinders, 12a, 1
2b, 12c, 12d …… fixed shaft, 13,14 …… wire rope, 15a, 1
5b: central connecting beam, 16a, 16b, 16c, 16d ... pulley, 17 ...
Wire rope, 18 ... Side door frame, 19, 20 ... Fixed axis.

Claims (1)

(57) [Claims] 1. Each column of the gate-shaped frame has a double structure of a column outer column and a column inner column, one end of a hydraulic cylinder is fixed in the column outer column, and the other end of the cylinder is the lower end of the column inner column. The upper and lower bearings of the inner box of the strut are pivotally attached to the front and rear ends of the front and rear outer pulleys and hydraulic cylinders.
Inner pulley, side door frame and ceiling frame, front and rear through shafts coaxially equipped with springs, etc.
One end of the ceiling frame is rotatably provided on the front-rear penetrating shaft, the central connecting beam is fixed to the other end of the ceiling frame, and the wire rope fixed to the upper end of the side door frame is The wire ropes, whose ends were fixed to the gate-shaped frame columns and whose one ends were fixed to the connecting beams on the front left side, were provided at both ends of the central connecting beam fixed to each end of the front right outer pulley and the left and right connecting beams. The wire rope fixed at the other end to the rear left-side connecting beam through the pulley and the rear right-side outer pulley, and further fixed at one end to the front-right connecting beam is a pulley installed at both ends of the left outer pulley and the center connecting beam. The other end is fixed to the rear right connecting beam via the rear left outer pulley, and the ceiling and side doors are opened and closed by the expansion and contraction action of the hydraulic cylinders in the left and right connecting beams and in the portal frame. A cargo box opening / closing device for vehicles such as trucks.