JP3728832B2 - Coil spring disengagement prevention structure - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a structure for preventing a coil spring from being detached when a fixing plate and a sliding plate provided with a coil spring are attached to and detached from a frame body.
[0002]
[Prior art]
It is possible to provide a sliding plate that moves along the spindle and guide with respect to the fixed plate, install a coil spring between the fixed plate and the sliding plate, and fix this assembly part to the frame with screws, etc. It is done. In such a structure, as shown in FIG. 4, the coil spring is attached by making a hole in the locking piece and fitting the end of the coil spring rounded into the hole.
[0003]
With this structure, since the tip of the coil spring is rounded, there is no fear of coming off, but the work of fitting the rounded tip of the coil spring into the hole of the locking piece is cumbersome, and it was not possible to perform quick installation work.
[0004]
In order to facilitate this mounting operation, as shown in FIG. 5, a notch is provided in place of the hole of the locking piece, the end of the coil spring is formed in a U shape, and the end of the U shape is extended while the coil spring is stretched. When the portion is fitted to the notch portion of the locking piece, the coil spring can be easily attached because the U-shaped portion is fitted to the notch portion by the contraction force of the coil spring.
[0005]
[Problems to be solved by the invention]
The structure in which the notch portion of the locking piece and the U-shaped end portion of the coil spring are locked improves the efficiency by simplifying the assembling work. The coil spring is connected to the frame body and the sliding plate. When it is performed in between, the operator's hand is not touched after installation, and can be used without any problem.
[0006]
However, this coil spring mounting structure is applied to assembly parts that are attached to the frame, and can be managed in the form of a part with a fixed plate or sliding plate, or the integrated part can be attached to or detached from the frame. In this case, it is moved and assembled by hand. At this time, it is necessary to wear gloves to protect the hands and fingers, so it is easy for the gloves to get caught on the U-shaped end of the coil spring. The coil spring may be removed by hooking the end of the letter shape.
[0007]
[Means for Solving the Problems]
The present invention for solving the above-mentioned object is provided with a fixed plate 2 detachably provided on the frame body 1 and a sliding plate 3 movably attached to the fixed plate 2, and the fixed plate 2 and the sliding plate. 3 is provided with locking pieces 4 and 5, and a coil spring 6 is mounted between the locking pieces 4 and 5 to bias the sliding plate 3 in the direction of the locking piece 4 of the fixed plate 2. in the device, the locking piece 5 is a cut-out portion 5a formed on an end of the flat plate-like member, the coil spring 6 to form a tip in a U-shape engages the notch 5a of the locking piece 5, the coil spring An end portion 6a formed in a U-shape of 6 floats between the locking plate 5 and the flat plate-like member and is positioned through a gap, and is located in front of the end portion 6a of the coil spring 6 positioned through the gap . The flat plate member is bent in an L shape so as to approach the end of the coil spring 6 to form the protective plate 7, Folded protective plate 7 are taller than the end 6a of the coil spring 6 which lifted from the plate member of the locking piece 5, the end directly protected the ends 6a formed in the U-shape of the coil spring 6 The part 6a is not touched by hands or fingers.
[0008]
[Action]
In the coil spring 6 of the present invention, the end portion 6a is formed in a U-shape, and the notch portion 5a is provided in the locking piece 5, so that the U-shaped portion of the end portion 6a is notched with the coil spring 6 extended. The U-shaped portion of the end portion 6a is fitted into the notch portion 5a when the coil spring 6 is contracted only by being positioned in the vicinity of 5a, and a special operation is performed to lock the coil spring 6 to the locking piece 5. Can now be easily locked.
[0009]
In addition, a coil spring 6 is mounted between the locking pieces 4 and 5 provided on the fixed plate 2 and the sliding plate 3, and the frame body 1 and the fixed plate 2 are attached and detached. There is an operation of holding the fixed plate 2 and the sliding plate 3 integrated by hand and moving them to a designated place of the frame 1, and at this time, the end of the U-shaped portion of the coil spring 6 locked to the notch 5 a is lifted Therefore, the glove may catch on the raised U-shaped end.
[0010]
If the gloves are forcibly pulled in this state, the U-shaped part of the coil spring 6 may be pulled, and the U-shaped part and the cutout part 5a may come off. In this invention, since the protective plate 7 is provided on the locking piece 5 near the notch 5a, if the height of the protective plate 7 is set higher than the end 6a of the coil spring 6, the glove holds the vicinity of the coil spring 6. However, the glove and the U-shaped part are not caught and the coil spring 6 can be prevented from coming off.
[0011]
【Example】
The present invention will be described with reference to the structure implemented in the ignition device of the oil combustor shown in the figure. 1 is a frame raised from an oil tank of the oil combustor, 2 is a fixing plate of the ignition device attached to the frame 1 with screws 8 3 is a sliding plate rotatably attached to the fixed plate 2 by a support shaft 9, 10 is an igniter attached to the sliding plate 3, and 11 is an opening / closing plate for opening and closing the ignition hole 12. The operation direction of the plate 11 is determined by the fitting of the guide shaft 13 and the long hole 11 a, and the opening / closing plate 11 is interlocked with the sliding plate 3 by the interlocking shaft 14.
[0012]
Reference numeral 15 denotes a core holding cylinder erected from the oil tank. Reference numeral 16 denotes a core mounted on the core holding cylinder 15. The core 16 is moved up and down by a core lifting device (not shown). Reference numeral 17 denotes an ignition lever slidably provided on the fixed plate 2. Reference numeral 3a denotes a driving piece of the sliding plate 3. Reference numeral 11b denotes an ignition door attached to the opening and closing plate 11. When the ignition lever 17 is pressed, the driving piece 3a is pushed. Thus, the sliding plate 3 is moved, and at this time, the opening / closing plate 11 is moved via the interlocking shaft 14, so that the ignition door 11 b covering the ignition hole 12 opened in the core holding cylinder 15 is detached from the ignition hole 12. .
[0013]
18 is a pressing plate provided on the fixed plate 2, 19 is an ignition switch attached to the sliding plate 3, and the igniter 10 of the sliding plate 3 that is moved by being pressed by the ignition lever 17 moves toward the ignition hole 12. At this time, the ignition switch 19 is pushed by the push plate 18 to energize the igniter 10. The igniter 10 that is energized and glows red is ignited by approaching the core 16 from the ignition hole 12.
[0014]
6 is a coil spring attached between the fixed plate 2 and the sliding plate 3, and when the sliding plate 3 is moved by being pushed by the ignition lever 17, the coil spring 6 is extended. When the pressing force of the ignition lever 17 is stopped after the core 16 is ignited, the coil spring 6 contracts to return the sliding plate 3 to its original position, and the ignition hole 12 is closed by the ignition door 11b. Starts normal combustion.
[0015]
The coil spring 6 used in the structure as described above is conventionally attached as shown in FIG. 4, and the locking piece is bent from the sliding plate or the fixed plate toward the mounting direction of the coil spring. The rounded end of the coil spring 6 was engaged with the hole formed in the hole, and it was very difficult to install it unless it was used to the installation work.
[0016]
The present invention improves the difficulty in mounting. Reference numeral 4 denotes a locking piece provided on the fixed plate 2, 5 denotes a locking piece provided on the sliding plate 3, and 4 a and 5 a constitute a mounting portion with the coil spring 6. It is a notch part. Reference numeral 6a denotes an end portion of the coil spring 6, which is formed in a U shape. For this reason, when the coil spring 6 is extended and the U-shaped part is positioned near the notch part 5a and separated, the U-shaped end part 6a is fitted into the notch part 5a when the coil spring 6 contracts. The troublesome work of inserting the end of the coil spring into a small hole as in the prior art is no longer necessary.
[0017]
Further, as in the embodiment of the present invention, when the fixed plate 2 and the sliding plate 3 are integrated and detachably attached to the frame body 1 with screws 8 or the like, the operator must use a gloved hand. Carry the entire ignition device or do the fixing work. As shown in FIG. 5, the tip of the U-shaped coil spring 6 is lifted, and the U-shaped portion that has been lifted is caught on the glove during the operation, and the coil spring 6 is easily pulled and removed.
[0018]
The present invention is adapted to cope with such troubles, and 7 is in the vicinity of the notch 5a of the locking piece 5 and is in contact with the end 6a of the coil spring 6 or through a small gap, The protective plate 7 is formed taller than the end of the U-shaped coil spring 6. Even if the operator carelessly touches the vicinity of the end 6 a of the coil spring 6 with a gloved hand, the glove does not touch the protective plate 7. The U-shaped portion at the tip of the coil spring 6 is not touched only by touching.
[0019]
For this reason, the end of the U-shaped coil spring 6 is caught in the working gloves, and it takes a long time to remove it, and the work is stopped during that time, or the coil spring 6 is removed by force, and the coil spring 6 is removed. The need to start over from the installation work has resulted in a large brake in the work process, but such troubles can be solved simply by attaching the protective plate 7 of the present invention by cutting or spot welding. It became.
[0020]
In the present invention, the structure, operation and effect when the U-shaped portion of the coil spring 6 is locked to the notch 5a of the locking piece 5 of the sliding plate 3 are described. When there is a possibility that the glove may get caught in the locking piece 4 or the notch 4a of the other fixing plate 2 corresponding to the end, a protective plate 7 may be attached to this part, and the coil spring 6 caused by the glove's catching. Can be prevented from coming off.
[0021]
【The invention's effect】
As described above, according to the present invention, the end 6a of the coil spring 6 is formed in a U shape and is locked to the notch 5a of the locking piece 5. Therefore, the coil spring 6 is extended and the U shape of the coil spring 6 is extended. The end portion 6a may be locked to the notch portion 5a, and the troublesome work of engaging the rounded end of the coil spring with the hole of the conventional locking piece is not required, and the coil spring 6 is easily engaged with the sliding plate 3. It can be stopped.
[0022]
Further, the coil spring 6 is not directly attached to the frame body 1 but is mounted between the fixed plate 2 and the sliding plate 3, and is fixed when the structure is implemented so that the fixed plate 2 is attached to and detached from the frame body 1. The parts composed of the plate 2 and the sliding plate 3 are handled with hands protected by gloves, and the gloves are likely to catch on the U-shaped part of the end of the coil spring 6 that is lifted when locked to the notch 5a. .
[0023]
In the present invention, since the protective plate 7 having a taller height than the U-shaped portion of the coil spring 6 is provided on the locking piece 5 near the notch portion 5a, the glove will not be caught by the U-shaped portion even if the glove is pressed near the coil spring 6. There is no need to perform the work of removing the hook in the middle of the work or to forcibly pull the gloves to remove the coil spring 6 and to start over from the work of attaching the coil spring 6.
[0024]
Furthermore, although the structure for locking the U-shaped coil spring 6 to the notch 5a can be easily attached, it is easily disengaged when the operator handles it as a part, and it cannot be used anywhere. The structure of the invention makes it possible to expand the range of use and contribute to improving workability.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a mounting portion of a coil spring showing an embodiment of the present invention.
FIG. 2 is a partially cutaway plan view of an oil burner ignition device that implements a coil spring mounting portion according to the present invention.
FIG. 3 is a partially cutaway plan view of an essential part of the ignition device of the oil combustor shown in FIG. 2 at the time of ignition.
FIG. 4 is a cross-sectional view of a mounting portion of a coil spring in a conventional example.
FIG. 5 is a sectional view of a mounting portion of a coil spring having a defect to be solved by the device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 2 Fixed plate 3 Sliding plate 4 Locking piece 5 Locking piece 5a Notch part 6 Coil spring 6a End part 7 of a coil spring Protection plate

Claims (1)

A fixed plate 2 detachably provided on the frame 1 and a sliding plate 3 movably attached to the fixed plate 2 are provided, and the locking pieces 4 and 5 are respectively attached to the fixed plate 2 and the sliding plate 3. A coil spring device that attaches a coil spring 6 between the locking pieces 4 and 5 and biases the sliding plate 3 in the direction of the locking piece 4 of the fixed plate 2;
The locking piece 5 is formed with a notch 5a at the end of the flat plate member, and the coil spring 6 is formed with a U-shape at the tip to engage with the notch 5a of the locking piece 5, The end portion 6a formed in a letter shape floats between the flat plate-like member of the locking piece 5 and is located through a gap,
A flat plate-like member in front of the end 6a of the coil spring 6 located through the gap is bent in an L shape so as to approach the end of the coil spring 6 to form the protective plate 7.
The bent protective plate 7 is taller than the end 6a of the coil spring 6 that is lifted from the flat plate member of the locking piece 5, and the end 6a formed in the U shape of the coil spring 6 is protected. A feature to prevent the coil spring from coming off.

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