JP3359875B2 - Lid and its opening and closing mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover capable of completely closing and opening an opening of a box and a mechanism for opening and closing the same, and more particularly, to completely closing and opening an opening above a hopper of a concrete mixer truck. The present invention relates to a possible lid and an opening and closing mechanism thereof.

[Prior art]

2. Description of the Related Art In a concrete mixer truck, in order to prevent foreign matter, for example, rainwater or dust, from entering through an opening of a hopper during transportation of ready-mixed concrete, a lid composed of a single lid is provided in the opening as a whole. The department is closed.

[0003] Further, at the edge of the opening on the mixer side,
In order to prevent the ready-mixed concrete from scattering and contaminating the mixer when the ready-mixed concrete is received in the hopper at the factory, a baffle plate made of an elastic material, for example, a rubber plate is provided so as to protrude above the edge. I was

Therefore, the lid is made of a flexible material so as not to damage the baffle plate in the closed position, and has a margin corresponding to the protruding portion.
For example, it is necessary to manufacture a structure in which a material such as a tent material is loosely stretched on a frame slightly larger than the outer periphery of the opening, and the lid bulges upward by an amount corresponding to the height of the baffle plate. I was forced to run in the state. Of course, since the baffle plate is damaged little by little when the lid is opened and closed, the baffle plate needs to be replaced periodically.

[0005] Furthermore, when the lid is bulged upward, especially when it is applied to a small vehicle, its height is also a problem. Considering the acceptance of ready-mixed concrete at the factory,
Because the height of the hopper itself is matched to that of a large vehicle, the bulge reduces the advantage of a small vehicle.

Further, since the lid is composed of a single lid as a whole, in order to bring it to the open position, it is necessary to rotate the lid about 180 degrees, and the stroke of the actuator for this is large. Was needed.

[0007]

SUMMARY OF THE INVENTION The present invention aims to provide a cover and a mechanism for opening and closing the cover which solve the above-mentioned problems of the prior art. It is an object of the present invention to provide a lid and a mechanism for opening and closing the lid, which do not require the height of the vehicle, and which do not require disposing a baffle plate, which is a main factor of the problems of the prior art.

[0008]

That is, the present invention provides a lid comprising a first lid and a second lid having their edges connected to each other via a hinge, A rotating shaft is arranged on the edge of the lid opposite to the connecting portion and in the vicinity of the connecting portion of the first lid and near both side ends thereof;
One end is fixed to the vicinity portion, and the other end is provided with a second connecting rod having a first connecting shaft that can be hingedly connected to one end of the first connecting rod, respectively.

Specifically, the first lid and the second lid can be bent in a direction in which their upper surfaces approach each other with the connecting portion as a center of rotation.

Incidentally, it is preferable that the degree of bending is 100 to 90 degrees as an angle formed by the upper surfaces of the first lid and the second lid.

On the other hand, the mechanism for opening and closing the lid of the present invention is as follows.
In the lid having the above-described features, the opening at the top is in the vicinity of the opening edge of the box that can be completely closed and opened,
The two ends of the rotating shaft are rotatably locked to locking members disposed in the region of the second lid near both side ends thereof, respectively. At a predetermined position, and the first position is located at a position where the rotation shaft is locked.
A first connection in which the other end is hinged via a second connection shaft at a position parallel to the lid body at a predetermined distance in a state in which the opening is completely closed in the direction of the lid. At least one end of the rotating shaft is provided with an actuator capable of rotating the rotating shaft at least 90 degrees.

Here, as the actuator, conventional means may be applied as long as it can rotate the rotating shaft by a desired angle. Above all, a pneumatic cylinder (in the case of a large vehicle) fixed to the box body or an actuator utilizing an electromagnetic mechanical force (a small vehicle is also possible) is adopted, and the reciprocating motion of these rods is applied to one end of the rod. It is preferable that the rotational movement of the rotary shaft is converted through a third connecting rod fixed at the other end to the rotary shaft by a hinge connection via a third connecting shaft. This is because there is no need to provide a new drive source for the applicable vehicle.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing one embodiment of the present invention.

The lid of the present invention comprises a first lid (11) and a second lid (11).
A lid body (10) comprising a lid (12) and one edge (left edge in FIGS. 1 and 2) of the first lid and both side edges (FIG. 2). A second connecting rod (22, 22) erected on the vertical edge) and one edge of the second lid (the left edge in FIGS. 1 and 2). A rotating shaft (44). The first lid and the second lid are usually made of a material having shape retention properties, for example, a steel plate or a plastic (of course, as in the conventional case, the frame has water-impermeable properties). A flexible material may be attached, provided that the present invention does not
It is necessary for the frame to be two by tracing the outer periphery of each lid. Also, the flexible material does not need to be loosened and pasted as in the conventional one).

Here, one edge of the first lid is connected to the second edge.
The other edge of the lid (right edge in FIGS. 1 and 2)
The upper surfaces of both lids (11) and (12) are connected to each other by hinges (13, 13, 13) so as to be accessible. Although the number of the hinges is three in FIG. 2 (FIG. 2), since the hinges are connected to each other so that the lids can rotate about the hinges, the hinges are smoothly rotated. It goes without saying that the number is not limited as long as it is possible.

Further, the first connecting rod (21, 21) is provided at the other end.
1) The second connecting rod having one end (which will be described later) and the other end capable of being hinged via the first connecting shaft (23, 23) has one end connected to the first lid. (Specifically, one end is fixed to the first
The upper end of the second connecting rod is fixed to the upper end of the second connecting rod by a stay or the like which is fixed to one end of the second connecting rod by welding or the like). In addition, both the first connecting rod and the second connecting rod,
Since it is only necessary that the length does not expand or contract from the viewpoint of its function, the inside of the rod is not necessarily required to be a solid rod, and may be, for example, a pipe (in this regard, a third connecting rod described later) (45) is also the same).

On the other hand, the lid opening / closing mechanism of the present invention is configured as follows. The opening at the top of the lid (shown by the broken line in FIG. 2 is the edge) is completely closed.
Close to the opening edge of a box that can be opened (reference numeral 50 is the hopper of the concrete mixer truck) and in the area of the second lid (12) (first, as shown in FIG. 2) (Which means that it does not enter the area of the lid (11) of the motor).
Both ends of 4) are rotatably locked (the mechanism formed as a result enables the lid body (10) to rotate about the rotation axis as its rotation center).

In the locking member, a closed position (the state shown by a solid line in FIG. 1) is closer to the first lid (11) than the locking position of the rotating shaft. Excluding that of the second lid which is the shadow of the member (30)-
The state shown by (2) is an open position) and the second connecting shaft (2) is moved to an appropriate position in parallel with the lid body.
A first connecting rod (21), the other end of which is hinged via (4, 24), is arranged (the mechanism formed as a result, namely the first connecting rod (21) and the second connecting rod (2)).
In the chain consisting of 2), the lid (10) is
4) is rotated about its rotation center (the direction of the arrow shown in the drawing of FIG. 3; the directly rotated is exactly the second lid (12)). Lid (11)
Is restricted to behave as a single lid with the second lid (12). FIG. 3 shows a state of the regulation. In FIG. 3, the state A is the “closed position”.
(The upper surface (or lower surface) of the first lid (11) and the second lid (1
The angle formed by the upper surface (or lower surface) of 2) is 180 degrees), state: B is "the state when the rotation axis is rotated 45 degrees", (the rotation axis of the second lid (12)). The angle with respect to the line connecting (44) and the second connecting shaft (24) is 45 degrees, wherein the angle between the upper surface of the first lid (11) and the upper surface of the second lid is 90 degrees. 180 °): C is in the “open position” (the rotation axis (4
4) The state where the angle with respect to the line connecting the second connecting shaft (24) and the second connecting shaft (24) is 90 degrees. In this state, the second lid functions similarly to a conventional baffle. For this purpose, the angle can be allowed up to about 80 degrees. In the drawing, the angle between the upper surface of the first lid (11) and the upper surface of the second lid is also 9
Although the angle is 0 degree, the requirement for the first lid in this position is limited by the height direction of the vehicle when the ready-mixed concrete is inserted.
Can be tolerated up to about 100 degrees when the angle with respect to the line connecting the connecting shafts (24) is 90 degrees.) As shown in FIG. B, the hinge (1) having the rotation axis (44) as a fulcrum
The locus drawn by 3): L2 and the locus drawn by the first connecting axis (23) with the second connecting axis (24) as a fulcrum: L1 are different.
That is, the fact that the latter fulcrum is more eccentric than the former fulcrum induces the bending of the first lid (11) only by such a pivotal movement about the rotation axis (44). . As can be seen from FIG. 3, the degree of bending of the first lid is determined by the position of the second connection shaft (24), that is, the distance from the rotation shaft (44) (the degree of eccentricity).
X1) and a position where one end of the second connecting rod (22) is disposed on the first lid, that is, a distance from the rotation center of the hinge (13) at one end (hereinafter X2). That)
And the length of the second connecting rod, that is, the distance from the one end to the other end (more precisely, the center of the first connecting shaft)
X3) (the distance between the rotation axis and the center of rotation of the hinge, that is, the length of the second lid (12) is, as described above, because it exerts the same effect as the conventional baffle plate). Constant). Incidentally, the relationship between the distances shown in FIG.
1: X2: X3 = 1: 1: 1, but the relationship may be determined by a graphical method according to each desired angle while taking into account the power required to open and close the lid.)

The rotational movement of the rotating shaft (44) causes the reciprocating motion of the rod (42) of the actuator (41) to be hinged at one end to the tip of the rod via the third connecting shaft (43). And the other end is fixed to the rotating shaft (specific means may be joining via a key or welding). The arc of the third connecting rod (45) (Of course, another method, for example, a method in which an actuator is a motor or the like, and the rotation of the shaft is transmitted to a rotating shaft directly through a sprocket and a chain or a reduction gear.) The power source that can be used in a vehicle to which the lid and the opening / closing mechanism of the present invention are applied is pneumatic (only large vehicles) or electric (small vehicles can also be used). A mechanism that converts into motion is preferred). Incidentally, specific examples of the actuator include:
An example using a pneumatic cylinder or an electromagnetic mechanical force (for example, a stroke motor SP manufactured by Nikken Corporation) is used.

[0020]

As described above, according to the present invention, when the lid is in the "open position", the second lid is in the "closed position".
The second lid plays the role of a conventional baffle, since it comes to a position just raised 90 degrees from it. Therefore, there is no need to separately provide a baffle plate. Further, since the lid in the “closed position” has no baffle, it can cover the upper opening edge of the box flat, and the problem in the height direction can be solved. Further, since the rotation angle of the rotation shaft is 0 to 90 degrees, a large-scale actuator for generating the rotation force is not required.

[Brief description of the drawings]

FIG. 1 is a left side view showing an embodiment of a lid and an opening / closing mechanism of the lid according to the present invention.

FIG. 2 is a top view showing the lid of the present invention and its opening / closing mechanism.

FIG. 3 is a diagram showing the operation of the lid and the opening / closing mechanism of the present invention with the skeleton over time.

[Explanation of symbols]

 10 Lid body 11 First lid 12 Second lid 13 Hinge 21 First connecting rod 22 Second connecting rod 23 First connecting shaft 24 Second connecting shaft 30 Locking member 41 Actuator 42 Rod 43 Third connecting shaft 44 Rotating shaft 45 3rd connecting rod 50 ... box (hopper)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 43/26 B65D 90/62 B60P 3/16

Claims (5)

(57) [Claims] 1. A lid comprising a first lid and a second lid having their edges connected to each other via a hinge, the lid being opposite to the connecting portion of the second lid. A rotating shaft is arranged at the side edge, near the connecting portion of the first lid and near both side ends thereof, one end thereof is fixed to the near portion, and the other end is A second connecting rod having a first connecting shaft that can be hinged to one end of the first connecting rod is provided upright, and the lid opens and closes an opening at the top of the box by opening and closing movement. The rotating shaft is disposed near the opening edge of the box body and near both side ends thereof in the area of the second lid. Both ends of the first connecting rod are rotatably locked to the locking member, and the other end of the first connecting rod is located at a predetermined position of the locking member, and Via a second connecting shaft at a position parallel to and at a predetermined distance from the lid body in a state where the opening is completely closed in the direction of the first lid from the locking position of the pivot shaft; A lid which is hinged. 2. The lid according to claim 1, wherein the first lid and the second lid can be bent in a direction in which their upper surfaces approach each other with the connecting portion as a center of rotation. . 3. The lid according to claim 2, wherein the bending angle is 100 to 90 degrees. 4. The lid according to claim 1, wherein an opening at an upper portion thereof is in the vicinity of an opening edge of a box body which can be completely closed / opened, and wherein the second opening is provided. The two ends of the rotation shaft are respectively rotatably locked to locking members arranged in the region of the lid near both side ends thereof, respectively, and at predetermined positions of the locking members. The second connecting shaft is located at a predetermined distance parallel to the lid in a state where the opening is completely closed in the direction of the first lid from the locking position of the rotating shaft. A lid opening / closing mechanism comprising: first connecting rods each having another end hinged thereto via an opening, and an actuator capable of rotating the rotating shaft at least 90 degrees at at least one end of the rotating shaft. 5. The actuator according to claim 1, wherein the actuator is an actuator using a pneumatic cylinder or an electromagnetic mechanical force fixed to the box, and reciprocates the rods, one end of which is connected to a third connecting shaft. 5. The lid opening / closing mechanism according to claim 4, wherein the rotation is converted to a rotational motion of the rotary shaft via a third connecting rod fixed at the other end to the rotary shaft. .