JPH01111524A - Mechanism for opening and closing roof with side plate in truck - Google Patents

Abstract

PURPOSE:To enable a roof with side plates balancing its weight with the tension of springs to be lightly securely opened and closed by facilitating the adjustment of the tension of springs and horizontal mounting angle. CONSTITUTION:This opening and closing mechanism 5 has a lift section 21 constituted to pivot a pivot 22 journalled on the upper portion of a cargo box 2 through a pivoting lever 23 with a force of a spring 28, and a roof 3 with side plates is mounted on the pivot 22. An operating lever 12 of operating section 11 is secured fixedly to the pivot 22 and pivoted by the operation of a pair of ropes 13 suspending from both ends of said lever 12 so that the roof 3 is opened and closed by the help of force of spring 28. A spring holder 26 is provided with expansible center shafts 29, 30. The other end of center shaft 30 is inserted through a bracket 42 so that the tension of spring 28 and the horizontal mounting angle of roof 3 can be adjusted by screwing an adjusting nut 47 onto the center shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION (3-1) Field of Industrial Application The present invention relates to an opening/closing mechanism for a roof with side panels in a freight vehicle having a high cargo box, such as a so-called pan truck.

(3-2) Conventional technology Among freight vehicles, so-called bread trucks protect cargo from wind, rain, dust, etc., and also prevent loss of cargo.
For the purpose of avoiding theft, etc., Figure 6 ((A) is a front view, ((A) is a front view,
As shown in (B) is a rear view and (C) is a side view, the packing box has a closed structure, but it is naturally desirable to have a large opening for loading and unloading cargo.

Conventional pan trucks usually have double-opening rear side panels, as shown in Figure (B), through which cargo can be loaded and unloaded. However, depending on the shape, size, and weight of the cargo, loading and unloading from the rear may be extremely inconvenient, and in such cases, it is necessary to create a structure that opens and closes both sides of the cargo box. In this structure, sliding doors are provided on both side panels, or a canopy is used in place of the side panels, and the canopy is rolled up or opened and closed from side to side like an accordion door.

However, the sliding door type cannot have a structure that opens the entire side panels on both sides, and the roll-up type using a hood or the accordion door type cannot be made too large due to strength issues. The drawback was that this could not be done.

The structures shown in Figure 7 (a), (b), and (c) eliminate this drawback, and all have a structure in which part or all of the side panels can be flipped up together with the roof panels. ing. These structures have wide openings on both sides of the cargo box, making loading and unloading extremely convenient. In addition, the applicant of the present application, who has proposed various new techniques regarding the raising and lowering operation mechanism, etc., has also proposed the following techniques.

■ 1980 Utility Model Registration Application Publication No. 002980 ``Assembly-type hood opening/closing mechanism for freight vehicles'' ■ 1980 Utility Model Registration Application Publication No. 050014 ``The top of a truck is a frame 1 ■ 1980 1980 Utility Model Registration Application Publication No. 050015 r The top of a truck is a truck 1 ■ 1980 Utility Model Registration Application Publication No. 140918 r The top of a truck is a frame opening/closing mechanism]
1985 Utility Model Registration Application Publication No. 003118r The top of a truck is a frame opening/closing mechanism J■ 1985 Utility Model Registration Publication No. 004421 Mounting Structure 1 This type of structure that flips up part or all of the side panels together with the roof panels is classified as follows depending on the drive method and operation method of the raising and lowering mechanism. There are some drawbacks that can be seen.

■ Due to the large number of hydraulically driven, button or lever-operated components, the weight of the parts is large, which significantly reduces the on-vehicle weight. In addition, a high level of design and manufacturing technology is required, making it difficult to predict and deal with problems such as oil leaks and galling of hydraulic equipment.

■ Electric type, button operation The winch is driven by a battery power source, and the side panels and roof are opened via a rope, but it is unreliable and a manual type is sometimes used in case of trouble.

■Spring type, rope operation In this method, the weight of the vertically moving side panels and roof is balanced by the force of springs, and the structure is manually driven by ropes. By using a coil spring as the spring, the lifting moment can be balanced, but as shown in Figure 8 (perspective view), a rope (indicated by an arrow) is stretched around the cargo box. This is dangerous because the rope may get caught on some obstacle, causing the roof with side panels to open or close against your will.

(3-3) Problems to be Solved by the Invention The present invention solves the above-mentioned drawbacks of the opening/closing mechanism for the roof with side panels of a freight vehicle, secures a large opening for the cargo box, and prevents opening/closing from occurring due to obstacles. The purpose of the present invention is to provide an opening/closing mechanism for a roof with side panels for a freight vehicle that does not cause malfunctions, does not require much weight of parts, and is highly reliable.

(3-4) Means for Solving the Problems and Their Effects The present invention solves the above-mentioned problems by configuring the opening/closing mechanism of the side plate roof of a freight vehicle as follows. . In other words, it consists of a rotating shaft rotatably connected to the upper part of the packing box, a roof with side plates fixed to the rotating shaft via a rotating lever, and one end attached to the upper part of the packing box. , the other end is attached to the said pivot lever, and it is used in a tension state, and the initial tension force and initial installation are made by a coil spring equipped with a horizontal angle adjustment device, and its center part is attached to the pivot shaft. It is composed of a fixed operating lever and an operating member attached to the operating lever that transmits an input, and the torque that the coil spring applies to the rotating wheel via the rotating lever is applied to the roof with side plates. The present invention is characterized in that the torques ζ applied to the rotating shaft via the rotating lever are adjusted by the adjusting device so that the directions of the torques are opposite and the absolute values are approximately equal.

This operating member may be a rope attached to the operating lever, or it may be a rod; since ropes can only transmit tensile forces, it is necessary to attach two of them to each end of the operating lever. However, since the rod transmits both tensile and compressive forces, one rod is sufficient.

An example of a horizontal angle adjustment device for adjusting the initial tensile force of the coil spring and the initial installation is a cylindrical shaft attached to the center of the coil spring, and a device coaxial with the shaft. another shaft with a thread, the outside of which is fitted inside the first shaft so as to be able to slide freely in the mutual axial direction; and two spring retainers respectively attached to both shafts. , is attached to the top of the shipping box,
A bracket having three long axes in the vertical direction, and two of the three long holes on both sides are attached to the bracket by adjusting bolts, and approximately in the center of the bracket is attached to the bracket. It is conceivable to have a plate to which the end of the other shaft is attached via an adjusting nut and a locking nut.

The torque applied from the coil spring to the rotating shaft of the opening/closing mechanism of the roof with side panels in this freight vehicle is applied by an initial tension adjustment device.

The tensile force of the coil spring is adjusted, and the moment arm can be adjusted by the horizontal angle adjustment device during initial installation, allowing for fine adjustments, which is especially convenient as it allows adjustments to be made outside the cargo box. be.

(3-5) Examples Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is a side view illustrating the opening/closing mechanism of the roof with side panels in a freight vehicle according to the present invention, the right half from the center line in Fig. 2 is a view seen from the direction of arrow A-A in Fig. 1, and the left half is 1st
It is a figure which looked at the cross section BB in the figure in the arrow direction. In FIGS. 1 and 2, a cargo box 2 is mounted on the chassis of a truck 1, and the roof and side panels of the cargo vehicle 2 are integrally constructed to form a roof 3 with side panels. The lower part of the side plate has an opening 4.

This side plate roof is opened and closed by a side plate roof opening/closing mechanism 5. The opening/closing mechanism of the roof with side panels includes an operation section 11;
It consists of a lifting force section 21 and an adjustment section 41. Operation unit 11
is a rotation shaft 22 (described later) of the lifting force section 21 at the front part of the cargo box.
The control lever 12 is fixed to the control lever, and the control lever 12 hangs down from two holes 12a provided at the end of the control lever (see Fig. 4).
(See b)) It consists of two ropes 13, a ring 14 attached near the lower end of the rope, and a hook 15 that is attached below the front end of the cargo box and engages with the ring 14. The roof with side plates is opened and closed by pulling one of the ropes 13, and when it is opened to a desired angle, it is fixed by hanging the ring 14 on the hook 15. The rope is connected between the front of the cargo box and the driver's cab, so there is no need to worry about the rope getting caught on an obstacle and causing a malfunction.

Normally, the lifting force part 21 and the adjustment part 41 are arranged in a total of 4 parts, one each on the left and right at the front upper part of the cargo box 2, and one each on the left and right at the rear upper part.
Individually installed. FIG. 3 is a diagram showing details of the lifting force section 21 and the adjustment section 41, in which (a) is a plan view, (b) is a front view including a partial cross section (hatching is omitted in the cross section), and (b) is a front view including a partial cross section. C) is a right side view, showing the one installed on the left side when viewed from the front driver's cab among the four. Also, Figure 4 (a) β and (b) are the third
In the figure 0, which is an enlarged view of what was seen from the arrow C-C direction and the arrow D-D direction in the figure, the lifting force section 21
The rotating shaft 22, the rotating lever 23, the bearing 24, the clevis 25, a pair of spring retainers 26 and 27, and the spring 2
8.2 The central axis of the tree consists of 29.30 mag.

The rotation shaft 22 is rotatably attached to the packing box 2 by a bearing 24. One end of the rotation shaft protrudes outside from the front of the packing box, and a key or the like is attached to that part. The 0-turn lever to which the turning lever 23 is fixed near the center of the 8-turn shaft to which the operating lever 12 is fixed by a key or the like is a substantially triangular plate; A canopy mounting plate 31 is fixed near one vertex of the rotating shaft, and a roof 3 with side plates is attached to this canopy mounting plate.

The prongs 25a of the clevis 25 are attached to the other vertex of the rotating lever by a clevis pin 32 so as to be rotatable with respect to each other.

The clevis 25 consists of a pronged portion 25a and a boss portion 25b, and one end portion of a spring retainer 26 is screwed into and fixed to the boss portion. One end of a central shaft 29 is fixed to the other end of the spring retainer 26 by welding or the like. The central shaft 29 has a cylindrical shape, and one end of another central shaft 30 is fitted inside the other end so as to be able to freely slide against each other, and the axes of both central shafts z9 and 30 are aligned. There is.

The vicinity of the other end of the central shaft 30 is threaded, and a spring retainer 27 is fixed with a nut. The other end of the central shaft 30 is a bracket 4 fixed to the cargo box 2.
It is attached to a plate 43 attached to 2. A spring 28 is installed in tension between the spring retainers 26 and 27. This spring 28 applies clockwise torque in FIG. 3(b) to the rotating shaft 22 via the spring retainer 26, clevis 25, and rotating lever 23. On the other hand, when attaching the roof 3 to the canopy, a counterclockwise torque is applied to the rotating shaft 22 through the plate 31 and the rotating lever 23, so the tensile force of the spring 28 can be adjusted, and the tensile force can be adjusted. By changing the direction of action and adjusting the moment arm, the torque acting on the rotation shaft 22 can be made extremely small. Therefore, the roof with side panels can be easily opened and closed using an input using an operating part such as an operating lever. operations can be performed.

The adjustment section 41 is comprised of the central shaft 29, 30, spring retainer 26, 27, bracket 42, plate 43, etc. described above. The bracket 42 is fixed to the packing box 2 by welding or the like, and three elongated holes 44 and 45 having long axes in the vertical direction are bored in this bracket. One adjustment port 46 is inserted into each long hole 44 on both sides, and the plate 43 is attached by tightening the adjustment port 46. The central axis 30 mentioned above is located at the center 45 of this elongated hole.
After being inserted into a round hole drilled in the plate 43, it is attached to the plate 43 by an adjustment nut 47 and a lock nut 48. If you now loosen the lock nut 48 and turn the adjustment nut 47, the center shaft 30
moves in the left or right direction in FIG. .

Next, by loosening the adjusting bolt 46 and moving the plate 43 in the vertical direction, the angle of the central axis 30.29 with respect to the horizontal line changes, and the horizontal angle of the initial installation of the coil spring can be adjusted.

As described above, the torque generated by the gravity of the roof 3 with side plates and the torque generated by the coil spring 28 act in opposite directions on the rotation shaft 22, but the weight of the roof 3 with side plates remains constant. However, since the distance between the perpendicular line passing through the center of gravity and the axis of the rotating shaft 22 differs depending on the degree of opening of the roof with side panels, the torque generated by this gravity also differs. - Since the torque generated by the coil spring in the opposite direction also changes depending on the opening degree of the roof with side plates, the rotation axis 2
Although it is impossible to reduce the torque acting on 2 to zero,
By repeatedly adjusting the initial tensile force of the coil spring and adjusting the horizontal angle during initial installation based on theoretical analysis and experimental results, this value can be easily manipulated by inputting it using the control lever described above. It is possible to make it as small as possible. An example of the result of this adjustment is shown in the graph shown in FIG. 5, which shows the relationship between the opening degree (canopy angle) of the roof with each side plate and the operating force.

In the embodiment described above, there are two holes in each end of the operating lever 12.
Although a real rope 13 is attached, a rod may be used instead of this rope.In this case, the rod has high rigidity and can transmit both tensile force and compressive force, so one rod is attached to the hole 12a of the operating lever. It is sufficient to attach it to one side. The operating rope 13 is fixed by engaging a ring 14 attached near its lower end to a tool 2 15.
The rope may be directly tied to the hook and fixed without providing a ring.

(3-8) Effects of the Invention The present invention provides an opening/closing mechanism for a roof with side panels on a freight vehicle that balances the weight of the roof with side panels using a spring and can be easily operated by input using a rope or the like. However, due to the tensile force of the spring and the ease of adjusting the horizontal angle of the mounting, it exhibits the following excellent effects.

■ A large opening can be secured in the packing box.

■ Opening/closing will not malfunction due to obstacles.

■ Since the weight of the opening/closing mechanism itself is light, there is no need to reduce the weight of the truck.

■ Extremely reliable and easy to adjust.

[Brief explanation of the drawing]

Fig. 1 is a side view illustrating the opening/closing mechanism of the roof with side panels in a freight vehicle according to the present invention, the right half from the center line in Fig. 2 is a view seen from the direction of arrow A-A in Fig. 1, and the left half is 1st
3 is a diagram showing the details of the lifting force section and the adjustment section, (A) is a plan view, and (B) is a front view including the - section cross section. (C) is a right side view, Figures 4 (A) and (B) are enlarged views of the views seen from the arrow C-C direction and the arrow D-D direction in Figure 3, respectively, and Figure 5 is an initial view. A graph showing an example of the results of adjusting the tensile force and the horizontal angle of the initial installation. Figure 6 is a diagram showing the structure of a pan truck among freight vehicles, (a) is a front view, (b) is a rear view, (c) is a side view, Fig. 7 (a)
, (B), and (C) are diagrams showing a structure in which the side panels can be flipped up together with the roof panels, and FIG. 8 is a diagram showing the drawbacks of the operating method using a rope. l... Freight car 2... Loading box 11...-Operation section 12--Operation lever 12a*e hole. 13...Fist rope 14...Ring 15-@Fist hook 21...Lifting part 22.e.Rotating shaft 23...Rotating lever 241
1... Bearing 25... Clevis 25a... Forked part 25b... Post part 26.27... Spring retainer 28... Spring 29.30 II11... Central shaft 31... Canopy mounting plate 32...・Clevi pin 41...adjustment part 42・φ・bracket 43...轡plate 44.4
511...Elongated hole 46...Adjustment port 47...Adjustment nut 48・φ・Lock nut Patent applicant Seiko Giken Co., Ltd. Agent
Patent Attorney Tsukamoto Daisan Department (A) Arrow View c-c
Figure 4 (.) Arrow. -9 Figure 6 (A) (B) (C) Figure 7 (A) (B) (Nori No. 8
Figure procedure amendment C method) % formula % ■, Indication of the case Patent application No. 243050 of 1988 2, Title of invention Opening/closing mechanism for a roof with side roots in a freight vehicle 3, Person making the amendment 4, Agent Address: 110 1-29-3-5015 Taito, Taito-ku, Tokyo Date of amendment order (all dates) December 22, 1986 6 Subject of amendment Drawing 7 Contents of amendment

Claims (4)

[Claims] (1) A rotating shaft rotatably attached to the upper part of the packing box, a roof with side plates fixed to the rotating shaft via a rotating lever, and one end of which is connected to the upper part of the packing box. a coil spring, the other end of which is attached to the pivot lever, used in a tensioned state, and equipped with an adjustment device for initial tension force and initial installation horizontal angle, and whose central part is fixed to the pivot shaft; and an operating member attached to the operating lever that transmits an input, and the torque applied by the coil spring to the rotating shaft via the rotating lever is applied to the side plated roof. An opening/closing mechanism for a roof with side panels in a freight vehicle, characterized in that the torque applied to the rotating shaft via a rotating lever is adjusted by the adjusting device so that the direction is opposite and the absolute value is substantially equal. (2) The opening/closing mechanism for a roof with side panels in a freight vehicle according to claim 1, wherein the operating member is a rope attached to both ends of the operating lever. (3) The opening/closing mechanism for a roof with side panels in a freight vehicle according to claim 1, wherein the operating member is a rod attached to one end of the operating lever. (4) the initial tensile force adjustment device and the initial installation horizontal angle adjustment device are installed on the same axis as a cylindrical shaft attached to the center of the coil spring; another shaft with a thread, the outer side of which is fitted inside the first shaft so as to be slidable in the mutual axial direction; and two spring retainers respectively attached to both shafts;
A bracket is attached to the top of the packing box and has three elongated holes with long axes in the vertical direction, and two of the three elongated holes on both sides are attached to the bracket by adjustment bolts. Claim 1, characterized in that the shaft is attached to a plate, and the end portion of the other shaft is attached to the approximately central portion of the plate via an adjustment nut and a lock nut. An opening/closing mechanism for a roof with side panels in a freight vehicle described in .