JPS6294419A - Auxiliary apparatus for opening and closing dump door of truck - Google Patents

Abstract

PURPOSE:To facilitate the manual opening and closing of a dump door by balancing the spring tension of a constant tension spring device and the turning moment applied onto the revolution shaft of the dump door by an operating lever with the drop moment due to the dead weight of the dump door. CONSTITUTION:When an upwardly directed force is manually applied onto a dump door 3 from outside to open the dump door 3, an operating lever 4 integrally formed with the turning shaft 2 of the dump door 3 turns downwardly as the turning shaft 2 turns. Then, the free edge of the operating lever 4 is pulled by a constant tension spring device 6 through a wire 5, and the dump door 3 is applied with the reactive moment corresponding to the drop moment due to the dead weight. Therefore, the dump door 3 can be opened by a small operating force. When the turning moment in the reverse direction is manually applied onto the dump door 3, the above-described drop moment and the reactive moment are balanced, and smooth closing is permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing auxiliary device for a swing door of an IT vehicle, particularly a wing-type swing door.

For example, as shown in Figure 6 of the attached drawings, the L side of the gate door 11 covering the side surface of the vehicle body 1o is horizontally aligned with the longitudinal direction of the vehicle body as a gate door for a freight vehicle. Fold it C towards the center of the direction so that it covers almost half of the roof.1. The side wall section 11 has an approximately L-shaped cross section and covers half of the vehicle body IQlb side surface and roof.
1 and the roof part 112 are integrally constructed, L, and (7'
) At the free side of the roof part 112, it is possible to turn freely with respect to the vehicle body 1o via each horizontal rotating shaft 12 fixed to the end thereof so as to extend in that direction;
Although wing-type swing doors with f-shaped wings have become publicly known, the type/i type has already been proposed as an opening/closing auxiliary device for the 127-type swing door 11, and the type 11 has also been proposed for practical use. (However, most of them use the following as their main power source, either singly or in combination. 1) Hydraulic motor 2) Electric motor 3 ) Manual win J- 4) Human power (applied via I'V-bu etc.) 5) Neshiri 2 1・f spring 6) One bow left behind: l Ino 1 spring 7) Torsion bar is 8) Gas springs, etc.

Gushi I"J11/I'Yonoryo-J is poor and tries to climb-
However, since the conventional and well-known opening/closing auxiliary device for gate doors of first-pass vehicles, especially wing-type gate doors, uses the above-mentioned power source, the following l:) There was a problem. That is, ^, it is expensive (this is because it requires the above-mentioned 1.2, 3.8, etc.) B. it is not possible to obtain good characteristics (this is because it requires 1.2, 3.8, etc.)
- There is little freedom in selecting the location for installing C (by using 4.5, 6.7, etc. described above) (this is due to the use of 1.2, 5, 6, 7.8, etc. described above) D. Requires an energy source (this is due to the need for
．． 2.8 etc.).

Therefore, the present invention solves the above-mentioned problems in the conventionally known products, is inexpensive, has good characteristics, and has a TI'Z
The purpose of this invention is to provide a new door for freight vehicles that allows freedom in the selection of locations and does not require external energy, especially an opening/closing auxiliary device for wing-type doors.

In order to achieve the object of item 2, the present invention provides a side wall portion 31 that covers the side or rear surface of the vehicle body 10 of a freight vehicle, as shown in FIG. 1 of the accompanying drawings. , the roof part 32 is formed by integrally folding the J" part above it so as to cover a part of the roof.
, 1) One car 10#) on the free side of the R root 3□) in the direction of the longitudinal center line A rotating shaft 2 extending horizontally in parallel with this direction (when the sliding door 3 covers the back surface of the vehicle body 1o)
In the wing-type gate 3, which is rotatably attached to the vehicle body 1o through ff operation lever 4 is fixed at its base end, a wire 5 is connected at one end to the free end of the operation lever 4, and the other end of this wire 5 is attached to the vehicle body 1o and connected to the It is guided to a constant tension spring device 6 attached to a part of the vehicle body 10 by a suitable guide means provided in the vehicle body 10, and is connected thereto, so that the spring tension of the constant tension spring device 6 and the actuating lever 4 are used. On each rotating shaft 2, there is a falling moment due to the weight of the sliding door 3 and a counter-moment 1 that makes a noise.
This is characterized in that the opening and closing operations of the gate door 3 can be performed with a small amount of force.

Due to the configuration such as "f-1" north of the stop, the swing door 3 can be rotated 11
Since the falling moment centered at l12 is almost equal to the tension of the spring of the constant tension spring device 6, opening and closing operations of the gate 3 can be performed with a relatively small force.

Hereinafter, the present invention will be described with reference to No. 1 of the accompanying drawings showing embodiments thereof.
Detailed explanation based on country.

First, FIG. 1 shows a vertical section 1.1 as a first embodiment of the present invention. The strut 1 is fixed at its base end to the underframe portion (not shown) of the vehicle body 10, and its upper portion is bent at a substantially right angle toward the longitudinal center line XX of the vehicle body 10. A horizontal portion 1□ is formed, and a rotating shaft 2 is rotatably attached to this horizontal portion 12 parallel to the longitudinal center line XX of the vehicle body 10, and the rotating shaft 2 has a cross section of approximately 1. The side wall portion 3 has a shape. and roof part 3
The edge of the roof portion 3 □ of the wing-type sliding door 3 consisting of 2 and 3 is fixed.

At the end of the rotating shaft 2, as shown in FIG.
4 is fixed to its proximal end, and a string member, e.g., a wire 5, is attached to the free end of the operating lever 4.
is fixed at one end of the wire 5, and the other end of the wire 5 is properly guided along the vehicle body, and then attached to the vehicle body 1.
0, for example, to the spring of a constant tension spring device 6 installed at the bottom of the white frame. The tension of the spring of the constant tension spring device W6 and the length of the effective arm of the operating lever 4 are such that the tension of the spring of the constant tension spring device 6 is applied to the rotating shaft 2 via the wire 5 and the operating lever 4. In advance, the rotational moment should be such that it is almost balanced with the falling moment of the sliding door 3 which acts around the rotating shaft 2 due to its own weight when the sliding door 3 is opened and closed.
■It shall be made so that it can be selected.

In this way, if the swing door 3 is opened from the closed state shown by the solid line in Figure 1, then = 7 - If an upward force is manually applied to the swing door 3 from outside, α, 3 rotates around the rotating shaft 2, the operating lever 4, which is fixed to the rotating shaft 2 and is integral with the rotating shaft 2, becomes in the state shown by the two-dot chain line in FIG. is pulled by the tension of the spring of the constant tension spring device 6 via the wire 5, and at this time, a reaction force moment corresponding to the falling moment due to its own weight is applied to the gate 3 via the operating lever 4 and the rotating shaft 2. Therefore, with a small operating force, the gate door 3 can be moved from the state shown by the two-dot chain line in FIG. 1 to the full swing position as shown by the solid line 11 in FIG. 6. In addition, in order to close the sliding door 3 in this full rotation position, if a turning force in the opposite direction is manually applied to the sliding door 3, the falling moment around the rotating shaft 2 due to its own weight will be Via the lever 4, it is counterbalanced by the reaction moment from the constant tension spring device 6 via the wire 5, so that its closure is prevented from falling quickly and can be carried out smoothly.

Next, FIG. 3 shows a second embodiment of the present invention. = 5 is guided to a constant tension spring device 6c via two pulleys 6 and 7 mounted on the vehicle body 10. l: sea urchin is turning
In this embodiment, the pulley 6
is rotatable around an axis fixed to the vehicle body 10.
=t However, it is assumed that the pulley 7 is rotatably supported by the rotating shaft 2.

FIG. 4 also shows that, in the embodiment shown in FIG. , ζ is shown connected via a wire 5 to a constant tension spring device 6 installed at the bottom of the white frame of the vehicle body 10.

Furthermore, FIG. 5 shows that the reaction force moment around the rotating shaft 2 acting on the actuating lever 4 due to the tension of the spring of the constant tension spring device 6 is expressed as follows: In order to compensate for the variation due to the swing angle around the door 2, the length of the effective working arm of the actuating lever 4 is made to vary approximately -) from the falling moment at each swing angle position of the sliding door 3. , a substantially triangular guide plate 20 is rotatably arranged at the apex of the rotating shaft 2, and is appropriately fixed to the vehicle body 10;
A guide groove 21 is provided in a contour such that the effective arm length of the operating lever 4 is equal to the falling moment of the swing door 3 at each turning position. Drill the elongated hole 22 and insert both of these guides J8.
This shows another embodiment of the present invention in which a connecting pin 23 is slidably disposed through the wire 21 and the elongated hole 22, and the end of the wire 5 is connected to the pin 23.

According to the embodiment No. 4, it is possible to make the reaction force moment caused by the spring of the constant tension spring device 6 and the operating lever 4 substantially constant regardless of the angular position of the swing door 3.

Although the present invention has been described above in the case where it is applied to the side wall of a freight vehicle, the present invention can also be applied to a sliding door that is not installed on the back of the vehicle body.
It's obvious. In addition, as the string member, for example, wire, chain, roller chain, rod, bell, etc. can be used. ' L-Terunote, to open and close an automatic sliding door, especially a wing-type sliding door, very easily and safely manually without the need for a special drive source. ``ζ'', and the location of the removal 1 is not specified, therefore, the degree of freedom of the mounting removal 1 and [ is increased, and the falling moment of the swing door and the constant tension are 41- can be improved (by the reaction force moment 1 due to the spring device and the actuating l/bar), and all the various drawbacks or problems in devices of this type known since then can be improved. It is something that can be resolved.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view showing one embodiment of the present invention, and FIG.
Figure 3 is a front view showing the rotating shaft and operating lever, Figure 3 is a front view without showing its deformation, and Figure 4 is a stationary unit installed under the floor of an automobile body using the embodiment shown in Figure 3. A perspective view showing an example of a state in which the tension spring device is connected to the tension spring device, and FIG.
A front view showing a guide mechanism for a wire operating lever to make the swing angle of the swing door almost constant in the infinite 1 system;
FIG. 6 is a front view of an example of a wing-type sliding door seen from the rear of a freight vehicle. 1... Support column, 2... Rotating shaft, 3... Swing door,
4... Actuation lever, 5... String member, 6... Constant tension spring device, 7.8.9... Pulley, 10... Vehicle body,
20... Guide plate, 21... Guide groove, 22... Elongated hole, 23... Continuous pin. Special Registered Wholesaler Minejin 3 wo Kompo Shobe Yoru 12 = Figure 1 Figure 2 Figure 3 1111 Figure 6

Claims (1)

[Scope of Claims] 1. In a swing door that covers the side or rear side of a freight vehicle, the upper part thereof is bent integrally so as to cover a part of the roof, and the side of the free end of the folded part is It extends in the direction of the longitudinal centerline of the vehicle body (in the former case) or in a direction parallel to a straight line perpendicular to it (in the latter case), and extends horizontally to each end of that side and rotates. In wing-type sliding doors of the type in which shafts are attached and the sliding door is pivotally attached to the vehicle body via these rotating shafts, the length perpendicular to at least one of the rotating shafts. An actuating lever having an actuating lever having an actuating lever is fixed at its proximal end, a string member is connected at one end to the free end of the lever, and the other end of the string member is connected to the free end of the lever by means of a suitable guide means attached to the vehicle body. It is connected to a constant tension spring device attached to a part of the vehicle body, and the spring tension of the constant tension spring device and the rotational moment applied to the rotating shaft by the operating lever are approximately balanced with the falling moment due to the sliding door's own weight. A truck door opening/closing auxiliary device characterized by having the following features: 2. The opening/closing auxiliary device according to claim 1, wherein an operating lever is attached to each rotating shaft, and the other ends of these operating levers are respectively connected to a common constant tension spring device via a string member. 3. Adjust the effective working arm length of the operating lever according to the opening/closing angle of the sliding door so that the reaction moment due to it and the spring of the constant tension spring device matches the falling moment, which changes depending on the opening/closing rotation angle of the sliding door. The opening/closing auxiliary device according to claim 1 or 2, wherein the opening/closing auxiliary device is configured to be variable. 4. In order to make the effective operating arm length of the operating lever variable, a guide plate is attached to the vehicle body near the rotating shaft, and a guide groove with an appropriate profile is provided on this guide plate, and a guide groove is provided on the operating lever in its longitudinal direction. Claim 3 describes a method in which a continuous pin is passed through a long hole that is bored through the guide groove of the guide plate and the long hole of the operating lever, and the end of the string member is connected to the continuous pin. Opening/closing auxiliary device. 5. The opening/closing auxiliary device according to any one of claims 1 to 4, wherein the string member is a wire, chain, roller chain, rod, belt, or the like.