JP4445144B2 - Fastening mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fastening mechanism, and more particularly to a fastening mechanism suitable for use in fastening a double door.
[0002]
[Prior art]
FIG. 3 shows a rear view of the removable container 10.
The container 10 has an open top surface and is disposed in a suitable place such as a factory. When waste such as garbage is thrown away and is full, it is placed on a truck bed and carried to a garbage incineration site. Used to dispose of.
The back side of the container 10 is a double door type (double door) doors 11a and 11b, and the doors 11a and 11b are rotated by shafts 12a and 12b, respectively.
Reference numeral 13 denotes a U-shaped fixture having a U-shaped cross section, which is rotatably attached to the upper edge of one door 11b and sandwiches both upper edges so as to straddle the upper edges of the doors 11a and 11b. , 11b is prevented from opening.
14 and 14 are so-called shrimp lock fasteners. As shown in FIG. 4, the doors 11 a and 11 b are engaged by the repulsive force of the spring 18 by hooking the hook 16 on the pin 15 and tilting the lever 17. The doors 11a and 11b are prevented from opening. Reference numeral 19 denotes a door handle.
[0003]
[Problems to be solved by the invention]
The above door fastening method has the following problems.
That is, the fixing tool 13 is easily detached due to vibrations during transportation, and naturally it is not possible to prevent the doors 11a and 11b from opening completely.
Further, since the shrimp lock type fastener 14 is only the tightening force due to the repulsive force of the spring 18, the tightening force is not so large in the first place, and the spring 18 gradually falls, and the tightening force becomes insufficient. There may be a problem that the doors 11a and 11b open due to pressure from the waste side.
Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a fastening mechanism that can obtain a large fastening force and is easy to operate.
[0004]
[Means for Solving the Problems]
In the fastening mechanism according to the present invention, the locking portion provided on one fastened body, the spindle provided on the other fastened body, and the side opposite to the locking portion with the spindle as a center A pivot arm attached to the support shaft on one end side, and a hook portion that can be locked to the locking portion on one end side, with the other end side extending in the support shaft direction. One end of the arm is pivotally attached to the other end of the hook arm by a first pin, and the other end is pivotally attached to the other end of the pivot arm by a second pin. A lock arm, a stopper of the lock arm, a lever portion provided on the rotating arm, and a guide portion provided on the one fastened body or the other fastened body to guide the movement of the hook arm. The lever is operated to move the rotating arm forward. When the second pin is rotated in a direction away from the locking portion, the hook arm is guided by the guide portion via the lock arm and moved, so that the hook portion is automatically moved during the movement. The locking between the locking portion and the spindle is started by locking with the locking portion, and further, the second pin is the maximum distance from the locking portion on the extension line connecting the locking portion and the spindle. When the lock arm comes into contact with the stopper at a position slightly exceeding the maximum tightening position, the return of the lock arm is locked while the state where the locking portion and the support shaft are tightened is maintained, When the lever portion is operated in the opposite direction, the hook arm is locked when the second pin is rotated in the initial direction of approaching the locking portion beyond the maximum tightening position. Through the arm Automatically the hook by moving guided by the de section is characterized by deviating from the locking portion.
[0005]
A roller can be used for the guide part.
Further, a midway portion of the hook arm is formed on a cam surface that contacts the guide portion and bends in the length direction of the hook arm. When the hook arm moves, the hook portion is regulated by the cam surface. It is preferable that the door is rotated so as to be in contact with and away from the locking portion and is engaged with and disengaged from the locking portion.
Further, the one and the other fastened bodies are one and the other of the double-open doors, and the enormous portion is formed at the front end of the engaging portion, so that the hook portion is restricted to the enormous portion when tightening. Thus, the door can be prevented from opening.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
1 is a front view showing a state in which a fastener 20 is attached to a door (one fastened body) 11a and a door (the other fastened body) 11b, and FIG. 2 is a plan view.
Reference numeral 22 denotes a locking pin (locking portion), which is fixed to the door 11a side. A ring 23 is fitted on the locking pin 22 to form a roller structure. Further, a washer (enlarged portion) 24 is fixed to the distal end portion of the locking pin 22 by welding or the like, and the ring 23 and a hook portion described later are prevented from coming off.
[0007]
Reference numeral 25 denotes a support shaft, which is fixed to the door 11b side. A ring 26 is fitted on the support shaft 25 to form a roller structure, and a stopper washer 27 is fixed to the tip.
Reference numeral 28 denotes a rotating arm. The rotation arm 28 is attached to the support shaft 25 on one end side so as to be rotatable around the support shaft 25 in an area opposite to the locking portion 22.
A hook arm 30 includes a hook portion 30a that can be locked to the locking pin 22 on one end side, and the other end side extends in the direction of the support shaft 25. A midway portion of the hook arm 30 is formed with an inclined portion 30b (intersecting an obtuse angle with the parallel portion at both ends) and is bent into a shallow Z shape. The lower end surface of the bent portion is formed on the cam surfaces 30c, 30d, and 30e.
[0008]
Reference numeral 32 denotes a lock arm, one end of which is pivotally attached to the other end of the hook arm 30 by a first pin 33 and the other end is turned to the other end of the turning arm 28 by a second pin 34. It is pivotally mounted.
The rotating arm 28 is provided with a lever portion 35.
Next, 36 and 37 are guide pins (guide portions) which are located on both sides of the hook arm 30 and fixed to the door 11b, and form a roller structure by fitting a ring. The cam surfaces 30c, 30d, and 30e of the hook arm 30 come into contact with the guide pin 36, and the movement of the hook arm 30 is restricted.
A shielding plate 40 is fixed over the tips of the guide pins 36 and 37 to prevent the ring from coming off and cover the middle part of the hook arm 30.
The guide pin 37 is not necessarily provided.
[0009]
The state shown in FIGS. 1 and 2 is that, together with the lever portion 35, the rotating arm 28 rotates in the direction of arrow A, and the locking pin 22 and the support shaft 25 (and therefore between the doors 11a and 11b) are tightened. However, when the lever portion 35 is rotated in the direction of the arrow B, the hook portion 30a is disengaged from the locking pin 22 and is in an untightened state.
When the lever portion 35 is rotated in the arrow B direction, the hook arm 30 is moved to the left in FIG. 1 via the lock arm 32, and the hook portion 30 a is detached from the locking pin 22. Furthermore, since the cam surface 30e is in contact with the guide pin 36, that is, the hook arm 30 is lowered below the state of FIG. 1, the hook portion 30a is surely detached from the locking pin 22.
In this state, the doors 11a and 11b can be opened.
[0010]
From the initial state, when the lever portion 35 is turned in the direction of arrow A and the turning arm 28 is turned in the direction in which the second pin 34 is separated from the locking pin 22, the hook arm 30 is moved to the lock arm 32. To the right in FIG. During the movement, the cam surfaces 30d and 30c are sequentially brought into contact with the guide pin 36 and the hook arm 30 is pushed up (the hook portion 30a rotates upward about the first pin 33, and the locking pin 22 In the middle of the movement, the hook portion 30a is automatically locked to the locking pin 22, and tightening between the locking pin 22 and the support shaft 25 (that is, between the doors 11a and 11b) is started.
[0011]
Further, as shown in FIG. 1, the second pin 34 is slightly beyond the maximum tightening position where the second pin 34 and the locking pin 22 on the extension line connecting the locking pin 22 and the support shaft 25 become the maximum distance. 32 abuts on the upper end surface of the rotation arm 28, and further rotation of the lever portion 35 is restricted. At this position, the tightening reaction force acts to rotate the lever portion 35 in the direction of the arrow A, but as described above, the lock arm 32 comes into contact with the upper end surface of the rotation arm 28 and is locked. The return of the lock arm 32 is locked while the clamped state between the stop pin 22 and the support shaft 25 is maintained. The upper end surface of the rotating arm 28 serves as a stopper, but the stopper may be provided as a separate member.
[0012]
As described above, in the present embodiment, the locking pin 22 and the support shaft 25 are strongly tightened by the lever action from the rotating arm 28. Moreover, since no spring is interposed as in the prior art, the tightening force does not weaken over time. Since the hook portion 30a is automatically locked to the locking pin 22 by the turning operation of the lever portion 35, the tightening operation is also simple.
Furthermore, since a washer (enlarged portion) 24 is provided at the tip of the locking pin 22, even if pressure such as waste is applied from inside the container, the hook portion 30a is regulated by the washer 24. The hook part 30a does not come off the locking pin 22. Therefore, the doors 11a and 11b never open.
[0013]
When the doors 11a and 11b are opened, the lever portion 35 may be rotated in the arrow B direction. Then, the second pin 34 is rotated in the initial direction of approaching the locking pin 22 beyond the maximum tightening position, and the hook arm 30 is guided by the guide pin 36 via the lock arm 32 and leftward. Further, by moving downward (the hook portion 30a rotates downward about the first pin 33 and moves away from the locking pin 22), the hook portion 30a is automatically detached from the locking pin 22. Since the hook arm 30 abuts against the guide pin 36 by its own weight and moves to the left and downward in FIG. 1, the guide pin 37 is not always necessary, but the locking tool 20 can be attached upside down or the hook arm 30 can be attached. Depending on the length of the guide pin 37, it is preferable to provide the guide pin 37 in order to ensure the movement of the hook arm 30.
[0014]
In the above description, the guide pins 36 and 37 are provided on the door 11b side, but may be provided on the door 11a side.
Also, the position of the first pin 33 is not particularly limited, but on or near the line connecting the locking pin 22 and the support shaft 25 so that the reaction force due to the tightening force acts linearly on each arm during tightening. Is preferred.
Furthermore, in the above, although the example using the fastener 20 as a fastener of a container door was demonstrated, it is needless to say that it is not limited to this.
[0015]
【The invention's effect】
According to the present invention, the gap between the locking portion and the support shaft is strongly tightened by the lever action from the rotating arm. Moreover, since no spring is interposed as in the prior art, the tightening force does not weaken over time. Since the hook part is automatically engaged with and disengaged from the locking part by the turning operation of the lever part, the operation is simple.
Furthermore, by providing the enormous part at the tip of the engaging part, even if pressure such as waste is applied from the fastened part side, the hook part is regulated by the enormous part, so that the hook part is detached from the engaging part. There is no such a thing, and both to-be-fastened parts will not open.
[Brief description of the drawings]
FIG. 1 is a front view of a fastener.
FIG. 2 is a plan view of a fastener.
FIG. 3 is an explanatory view of a fastener used in a conventional container. It is sectional drawing which shows an example of a shaping | molding die. FIG. 4 is an enlarged explanatory view of a conventional fastener.
[Explanation of symbols]
20 Fastener 22 Locking pin (locking part)
24 washers
25 Support shaft 28 Rotating arm 30 Hook arm 30a Hook parts 30c, 30d, 30e Cam surface 32 Lock arm 33 First pin 34 Second pin 35 Lever part 36 Guide pin (guide part)

Claims (4)

A locking portion provided on one fastened body;
A spindle provided on the other fastened body,
A pivot arm attached to the spindle on one end side so as to be rotatable in an area opposite to the locking portion around the spindle,
A hook arm that can be locked to the locking portion on one end side, and a hook arm that the other end side extends in the support shaft direction;
A lock arm whose one end is pivotally attached to the other end of the hook arm by a first pin and is pivotally attached to the other end of the pivot arm by a second pin. When,
A stopper of the lock arm;
A lever portion provided on the rotating arm;
A guide portion provided on the one body to be fastened or the other body to be fastened to guide the movement of the hook arm;
When the lever portion is operated to rotate the rotating arm in a direction in which the second pin is separated from the locking portion, the hook arm is guided to the guide portion via the lock arm. By moving, the hook part automatically engages with the engaging part in the middle of the movement, and tightening between the engaging part and the support shaft is started, and the second pin further supports the engaging part. The locking portion on the extension line connecting the shaft is in a state where the locking portion and the support shaft are tightened by the lock arm coming into contact with the stopper at a position slightly beyond the maximum tightening position that is the maximum distance. The return of the lock arm is locked while maintaining
When the lever portion is operated in the opposite direction, the hook arm is locked when the second pin is rotated in the initial direction of approaching the locking portion beyond the maximum tightening position. A fastening mechanism, wherein the hook portion is automatically detached from the locking portion by moving while being guided by the guide portion via an arm. The fastening mechanism according to claim 1, wherein the guide portion is a roller. A midway portion of the hook arm is formed on a cam surface that bends in the length direction of the hook arm that contacts the guide portion, and when the hook arm moves, the hook portion is regulated by the cam surface and the hook portion is The fastening mechanism according to claim 1, wherein the fastening mechanism is rotated so as to be in contact with or separated from the locking portion and is engaged with or disengaged from the locking portion. The one and the other to-be-fastened bodies are one and the other of a double-open door, and a huge portion is formed at the front end of the locking portion, and the hook portion is restricted to the large portion when tightening. The fastening mechanism according to claim 1, wherein the door is prevented from being opened by the step.

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