JPS5930249Y2 - Vibration damper and fixing device between two panels - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibration absorbing damper and fixing device between two panels.

In general, even though two panels are fixed at a predetermined distance apart, it is often desirable not to transmit mechanical vibrations occurring in one panel to the other panel.

For example, such a requirement is made when a refrigerator compressor is attached to the bottom panel of the refrigerator body.

However, the conventional mounting method and damper device have a large number of parts as illustrated in FIG. 1, and the work is extremely troublesome.

That is, a support pin T is installed in advance by welding on the bottom plate P1 as the first panel, a rubber sleeve S as a damper is fitted around it, and then By passing the pin T through the through hole of the mounting tab P2 as the second panel, and fitting the E ring R onto the pin T from above, the two panels P1, P
2, and as a result, the compressor C and the bottom plate P1 were fixed.

In the illustration, only one installation location is shown, but it is common knowledge that the installation location is multiple locations, such as the four corners around the compressor C, so the troublesome work described above must be performed at each location. This is because it takes a lot of effort,
The rebound in product costs was also significant.

Moreover, some of the work processes require specialized workers, such as welding work, and fitting the E-ring R is extremely troublesome, so it is not something that anyone can do, and only skilled workers are required. There was also the drawback of choosing the right person.

Further, even if such a troublesome work is required, the damper function relies solely on the rubber sleeve S, so there is a lack of design freedom in optimizing the amount of damping.

This project has a small number of parts in consideration of the ground level, and anyone can easily and quickly fix two panels together.
It is an object of the present invention to provide a vibration absorbing damper/fixing device that can also have a damper function at the same time.

The use of this type of device is not limited to the installation of a refrigerator compressor as in the above example, but can be applied to all cases where a vibration generation source is attached to the first panel P1 using the second panel P2 such as its mounting piece. In the end, the relationship can be summarized as the relationship between panels P1 and P2, so in the following embodiments of the present invention based on the attached drawings, the mutually attached illusory objects are the first and second panels P1,
Only P2 is shown.

FIG. 2 is a side sectional view of an embodiment of the present device before use or after plastic injection molding, and FIG. 3 is a side view seen from a direction 9(f) different from FIG. 2. .

As shown in these figures, the device 1 basically consists of a combination of two parts 2 and 3, but for convenience, the device 1 is shown pre-assembled and ready for use when viewed from the same direction as in FIG. The explanation will begin with reference to FIG. 5, which is a half-section view.

The device 1 first has a row of axially back-to-back snap-locking fasteners 4,5, each fastener 4,5
The first and second panels P1 and P2 are snap-locked into the mounting holes H1 and H2 of the first and second panels P1 and P2, respectively.

There is a connecting shaft portion 6 that connects the pair of center-aligned fasteners while being spaced apart from each other in the axial direction, and a structure exhibiting a damper function is arranged around this portion.

As shown in the figure, the lower side of the imaginary line is the snap-locking fastener part 4 to the mounting hole H1 of the first panel P1, and the upper side of the imaginary line is the snap-locking fastener part 5 to the mounting hole H2 of the second panel P2. It is easy to understand if the portion M between the two is considered to be the axial connection shaft portion 6 and the damper function portion to be described later.

The structure of the snap locking fasteners 4 and 5 itself may be a well-known structure using a well-known plastic fastener or rivet, and may have any structure such as a so-called canoe type or a hook type. In this example, a configuration belonging to the anchor type is used.

The dimensions of both fasteners 4 and 5 can be freely designed according to the corresponding mounting holes and plate thickness, but functionally they can have the same configuration, so the basic components will be explained at once. There are fastener heads 7, 8 abutting one side of each panel P1, P2, from which shanks or stems 9, 10 extend in the axial direction.

Flexible elastic locking pieces lL12 are provided on the inside and outside of the trunk in the radial direction, and heads 7 and 8 are attached to the edges of the mounting holes H1 and H2 of the panels P1 and P2, respectively, at the free end.
Locking surfaces 13 and 14 that engage with the inside of the row are provided.

In this embodiment, each fastener is provided with a pair of elastic locking pieces diametrically opposed to each other.
The number may be arbitrary as long as it can obtain enough force to lock 2, or 9 (four in the circumferential direction at f' intervals, etc.).

Although the fastener 5 for the second panel P2 appears to have four elastic locks, there are a pair of elastic arms 15, which are orthogonal to the original elastic lock pieces 12, 12 mentioned here.
15 has a stopper function for the upward movement of the panel, which will be described later, as one of the desirable considerations of this embodiment.
There is no direct relationship between the second locking.

In addition, the fastener heads 7 and 8 may have a suction cup shape, but
Depending on the case, it may be flat.

The fastening of the two panels P1 and P2 via the fastener portions having a known structure such as the ground type fastener is of course the same as the work of attaching this type of fastener, but will be briefly explained.

First, the trunk 9 of the first fastener 4 is inserted from the tip into the mounting hole H1 of the first panel P1.

Then, since the elastic locking pieces 11, 11 normally protrude beyond the edge of the mounting hole, this insertion hits the edge of the hole, and the elastic locking pieces 11, 11 are bent inward and passed through.

When the locking surface 13.13 of the free end of the elastic locking piece passes over the edge of the hole, the elastic locking piece that had been held back returns to its original position and locks the locking surface to the edge of the hole.

This allows the panel P1 to be attached to this locking surface 13.13.
The device 1 is sandwiched between the panel P1 and the head 7, and thus the device 1 is installed on the panel P1 in a mutually similar manner.

Thereafter, the second panel P2 is pushed into the second fastener 5 facing upward through its attachment hole H2.

Then, similarly, the elastic locking piece 12 of the second fastener 5,
12 is bent at the edge of the mounting hole of this panel, but when the panel P2 is pushed down until it hits the head 8, the locking pieces 12,
12 and the hole edge are released, and the locking piece 1
2 and 12 are restored by the elastic restoring force stored in themselves, and their locking surfaces are locked to the hole edge on the side opposite to the head 8.

Thereby, the second panel P2 can be fixed, and thus,
The panel P that appears on the panel P1 at a distance corresponding to the axial length of the connecting shaft portion 6 that connects both fasteners 4 and 5 in the axial direction.
2 support can be performed.

In principle, the vibration absorption damper function for preventing the vibration of the second panel P2 from being transmitted to the first panel P1 is as follows.
In this embodiment, a row of damper pieces 16, 17 extending in the radial direction and elastically abutting each other provided around the axial connecting shaft 60 form a suction cup shape in which the damper pieces 16, 17 face each other. I am doing it.

Therefore, one of the damper pieces 16 and 17, in this case,
The damper piece 16 of the fastener 4 for the first handle P1 is integrally molded in advance on the shaft 6, but the other damper piece 17 is connected to the head 8 of the fastener 5 on which it is located. Although the head 8 and the head 8 are integrally molded, they are separate from the shaft 6 and constitute a separate part 3, and the central through hole 18 of this part 3 is connected to the shaft 6. It fits loosely around the.

The basic structure of this proposal is as above.

Therefore, when the panel P2 fixed to a compressor or other vibration source vibrates, this vibration is caused by the fastener head 8, which is separate from other parts and presses down on the lower surface of the panel P2.
The vibration is then transmitted to the damper piece 17 that is integrated with the damper piece 17, and is absorbed by the elastic contact relationship with the other damper piece 16.

In this way, depending on the present device 1, both panels P, , P
2 can be fixed by simply pushing the corresponding fasteners 4.5 in a row-like manner, and it is rational that the vibration absorption function of the damper pieces 16 and 17 can be performed at the same time as this simple fixing work is completed. This can lead to negative consequences.

Moreover, the amount of damping can be adjusted almost steplessly by arbitrarily designing the radial extension length of the pair of damper pieces, the material, the degree of recess in the case of a suction cup shape, etc. In addition, the optimum damping amount can be easily obtained.

In fact, with this device manufactured by the present applicant for a refrigerator compressor, results have been obtained in which almost no vibrations are transmitted to the refrigerator bottom plate P1.

In the case of the proposed device, in principle there are three parts, so the second part 3, which consists of the fastener head 8 on one side and the damper piece 17 on the other hand, is at least connected to the second panel P.
Before fixing part 2, it is necessary to line up the first part 2, fit it, and press the button, but this can easily be done by attaching the second and third parts.
It is obvious from the figure.

That is, the trunk 10 of the fastener 5 whose head 8 is separate
Push the part 3 downward in the axial direction so that the tip 21 of the part 3 is inserted into the central through hole 18 of the part 3 in the axial direction, and push the elastic locking piece 12 inwardly and past it. All it has to do is drop it into a predetermined position where it comes into contact with the other damper piece 16.

Considerations that are desirable to add to the above-mentioned basic configuration will be described below.

The second part 3 dropped into a predetermined position is attached to both damper pieces 1.
6. In order to maintain the contact relationship of 17, it is desirable that there is no horizontal movement around the shaft portion 6.

For this purpose, it is good to take into consideration the diametrical relationship between the shaft portion 6 and the central through hole 18 of the component 3. For example, the elastic locking arm 12 of the fastener 5 may be A guide piece 19 is provided that penetrates into the body, and when an elastic arm 15 for a stopper function (to be described later) is provided as in this embodiment, a similar guide piece 20 is also provided for this, and the outer surface of the elastic arm 15 is used to prevent the part 3 from moving. It is preferable to press the inner surface of the through hole 18.

If this is done statically, even in a dynamic state, each guide piece 19
20 serves as an axial guide that restricts the direction of vibration of the component 3 due to the vibration of the panel P2 only in the axial direction.

The pair of elastic locking arms 15, 15 has a stopper function that elastically limits the upward movement distance due to vibration of the panel P2.

This is because the panel P2 has the fasteners 50 aligned therewith.
The head 8 and the locking surface 14 of the elastic locking piece 12 are sandwiched, but when the head 8 moves upward during vibration, the movement of the elastic locking piece 12 exclusively passes through the locking surface 14. If the upward movement distance is not limited, the locking piece 12 may be damaged when the panel P2 jumps up significantly. When it jumps up a lot and then falls, the damper piece 7t1
This is because a large impulse with a low fundamental frequency is applied to the panels 6 and 17, and the shock may be transmitted to the first panel P1 even though it could be absorbed by the single motion of the damper.

As shown by the distance t in FIGS. 3 and 5, the pair of elastic arms 15, 15 of the stopper are connected to the upper surface of the panel p2 to the locking surface 14 of the locking piece 12. There are spaced downward stopper surfaces 22, 22, and if panel P2
Even if it vibrates upward, the limit is reached when it hits this stopper surface.

The reason why this stopper function is provided by the elastic arm 15.15 is because, as mentioned above, when inserting the component 3 into a predetermined position, this arm 15. This is because I wanted to do it.

In this embodiment, the elastic locking pieces 12, 12, which originally only have a locking function, also have this stopper function as well as a vibration absorbing function.

1. Root portion 2 that serves as the fulcrum of deflection of this elastic locking piece.
3 is not attached directly to the trunk wall surface like general fasteners of this type, but is attached axially within the internal space via arm portions 24 bent radially inward at approximately right angles. The reinforcing crosspiece 25 is connected to the reinforcing crosspiece 25, thereby increasing the overall amount of deflection in the vertical direction to better absorb upward vibration components.
An eaves section 26 is provided at a predetermined distance above No. 4.
As shown by the imaginary line in the figure, even if the panel P2 vibrates upward significantly and the locking piece 12 is bent upward as a whole, a part of the arm portion 23 will be covered by the eaves at the predetermined distance and at the bent position. It touches the lower surface of the portion 26 and does not allow any further deflection.

Furthermore, since the entire device is a plastic molded product, if the panel P2 is made of metal, if it vibrates vertically while rattling in the horizontal plane, the edge of the mounting hole H2 will cause the device located inside the hole to It is conceivable to scrape the outside surface of each part.

Therefore, in this embodiment, the elastic locking pieces 12, 12 of the second fastener 5 and the stopper arm 15. The guide pieces 27 located in the four spaces in the circumferential direction created by 15 are erected in the axial direction beyond the head 8, so that the outer surface of the guide pieces 27 can be used to suppress movement caused by play in the inner peripheral surface of the mounting hole H1 of the panel P2. 3 years old, each fastener has 4,50 heads I
.
1. It is also desirable because it can have some vibration absorption function.

Furthermore, in this embodiment, a concentric, small-diameter suction cup-shaped auxiliary elastic piece 28 is provided above the lower suction cup-shaped damper piece on the connecting shaft 6, and its peripheral edge extends in the radial direction of the upper damper piece. There are clusters at intervals on the inner lower surface.

This does not have the same effect if the weight of the vibration source, such as a congressor, applied to the panel P2 is a design standard value.

However, although this device 1 can be used, if it supports a fairly large weight, the pair of damper pieces 16 and 11 will bend significantly, and in this case, if the suction cup is about to collapse into a flat shape, the reinforcing elastic pieces The tip (periphery) of 28 hits the bottom surface of the upper damper piece and supports it, and eventually the damper piece... 11
It increases the static strength of 6,17 and can withstand large weights better.

This auxiliary elastic piece 28 can withstand dynamic transient impact forces.
This restricts the downward movement distance of the entire part 3,
By keeping the elasticity of the lower damper piece 16 appropriate, it can withstand and absorb moisture well.

The damper pieces 16, 17 are not limited to suction cup shapes as long as they satisfy the above-mentioned functions.

For example, it may be separated into several parts in the circumferential direction, or it may have different shapes.

One may be flat, and the other may extend diagonally toward the flat plate.

Moreover, when providing the auxiliary piece 28, the same can be said about this, and this auxiliary piece may also be provided partially at the top and bottom.

As described above, the present device 1 includes two parts 2 and 3.
Since there are no combinations, the parts 2 and 3 may be molded as completely separate parts, as shown by solid lines in FIGS. 2 and 3.

However, after assembly, at least one damper piece is attached to the other part 2 along with the fastener head of the other damper piece.
Since it is sufficient that the parts 2 and 3 can be slid in line with each other (in other words, it is sufficient that the parts 2 and 3 become separate parts after assembly is completed), it is better to mold both parts 2 and 3 into two pairs during plastic injection molding. This is also desirable from the point of view of saving the number of expensive molds.

Therefore, in the case of the present applicant, the lower edge of the inner peripheral surface of the guide piece 27 of the other component 3 is formed with a weakened portion 29 on the outer peripheral surface of the tip 21 of the trunk 10 of the upper fastener of the component 2, as shown in FIG. They are integrally molded in a radially connected state, and are struck and dropped during assembly when the part 3 is fitted into a predetermined position below, and at that time, this fragile part 29 is forcibly torn off.

In addition, FIG. 7 shows a cross section of the main part along the line ■-■ of FIG. 2 and the line ■-■ of FIG. 6 (top view). , Part 3 connected at the weak part
is shown by a virtual line.

In this way, it is preferable to use one-piece press during molding to press the button, which saves money on the mold as described above, and avoids the trouble of separately transporting the parts 2 and 3 and the risk of loss.

In any case, as detailed above, according to this proposal, a vibration absorbing damper and fixing device between two panels can be obtained by a simple combination of three parts, and fixing to the panel can be done by simply pushing it. Since this is an extremely simple operation, anyone can perform the operation, it does not take up much time even if the number of attachment points increases, and the product cost can be reduced in the end.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a conventional damper, Fig. 2 is an exploded side sectional view of an embodiment of the present invention, Fig. 3 is a side view seen from a direction 96' different from Fig. 2, and Fig. 4 is a cross-sectional view of a conventional damper. Figure 3 is a sectional view taken along the line IV-Th7, Figure 5 is a half-sectional side view in use,
FIG. 6 is a plan view, and FIG. 7 is a cross-sectional view of the main part shown by the line ■-■ in FIGS. 2 and 6. In the figure, 1 is the proposed device as a whole, 2 is the first part, and 3
is a second part, 4 and 5 are snap locking fasteners, 6 is an axial connection axis, 7 and 8 are fastener heads, 9 and 10 are fastener trunks, 1L12 is a fastener elastic locking piece, 16.17
is a damper piece.

Claims (1)

[Scope of utility model registration request] A head, a trunk extending from the head, and a trunk provided on the trunk,
An elastic locking piece that snaps to the edge of a mounting hole drilled in a panel and a pair of free snap locking fasteners are connected back to back by an axial connecting shaft, and the connecting shaft has the above-mentioned pair of fasteners. A pair of damper pieces are provided between the heads of the damper pieces, projecting out in the radial direction, and elastically abutting each other. A vibration-absorbing damper between two panels, characterized in that it is connected to a fastener head to form a separate component independent of the others, and is capable of sliding relatively in the axial direction on the connecting shaft. Cum fixation device.