JPH05231470A - Damping method and damper - Google Patents

Abstract

PURPOSE:To display sufficient damping effect stably by fitting a damper, made of relatively large density material, to the specified place of the frame of equipment with vibration generating source so as to apply large mass in the concentrated state. CONSTITUTION:A damper 101 is manufactured of large density material such as brass, and the outer diameter d1 of a seat part 105 is to be smaller than the outer diameter d2 of a damper body 102. The damper 101 is fixed in contact with a frame base 1 through the narrowest possible seat part 105 and fitted to a place where the amplitude becomes largest in the case of the frame base 1 vibrating so as to let added mass converge, thus absorbing kinetic energy caused by vibration efficiently to damp the vibration effectively. The generation of noise can be thereby suppressed effectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control method for suppressing the vibration of a frame of various devices having a vibration source, for example, a metal plate of a printer, and is attached to the vibrating metal plate. The present invention relates to a vibration control body, and particularly to a vibration control body devised to enhance the vibration control effect by concentrating and adding a large mass.

[0002]

2. Description of the Related Art A printer, for example, a serial printer is constructed as shown in FIG. First, there is a frame base 1, and a right side frame 3 and a left side frame 5 are erected on both side ends of the frame base 1. A stay 7 and a rear angle 9 are provided between the right side frame 3 and the left side frame 5.

A carriage 11 is installed on the frame base 1 between the right side frame 3 and the left side frame 5. The carriage 11 moves in the left-right direction in the drawing along the stay 7 and the rear angle 9. A print head 13 is mounted on the carriage 11. The print head 13 performs desired printing on a sheet (not shown).

The carriage 11 is driven by a driving means 15. That is, the drive motor 17 is installed outside the left side frame 5, and the drive motor 1
A drive pulley 19 is fixed to the rotary shaft of 7.
On the other hand, a shaft member 21 is erected on the outer side of the right side frame 3, and an idler pulley 23 is fixed to the shaft member 21. A timing belt 25 is wound around the drive pulley 19 and the idler pulley 23. Therefore, when the drive motor 17 rotates forward and backward, the timing belt 25 rotates forward and backward via the drive pulley 19 and the idler pulley 23.

The carriage 11 described above is fixed to the timing belt 25. That is, a mounting plate 27 is provided on the lower surface of the carriage 11, and the timing belt 2 is provided between the mounting plate 27 and another fixed plate 29.
The carriage 11 is fixed to the timing belt 25 by sandwiching a part of 5 and inserting a fixing screw 31 there. Therefore, when the timing belt 25 rotates forward and backward, the carriage 11 moves in the left-right direction in the drawing.

In the serial printer having the above construction, when the rotation frequency of the drive motor 17 and the natural frequency of the frame base 1 match, resonance of the frame base 1 occurs. As a result, a large amount of noise is generated from the drive motor 17. Therefore, in order to suppress such resonance and consequently noise generation,
The damping plates 33 and 35 are attached to the frame base 1.
Various rubber materials are used as the damping plates 33 and 35, and they function to damp vibrations.

[0007]

The above-mentioned conventional structure has the following problems. That is, the conventional damping plate 3
The vibration damping structure of Nos. 3 and 35 has a problem that a sufficient vibration damping effect cannot be expected. This is the conventional damping plate 3
This is because 3, 35 are attached to the frame base 1 in a wide range with a relatively large contact area, and it was not efficient in absorbing vibration energy.
Further, since it is made of various rubber materials, it has been feared that the vibration damping performance may change due to temperature changes.

The present invention has been made on the basis of such a point, and an object thereof is to provide a vibration damping method and a vibration damping body which can stably exhibit a sufficient vibration damping effect. Especially.

[0009]

In order to achieve the above object, a vibration damping method according to the present invention uses a vibration damping body manufactured from a material having a relatively high density as a predetermined amount for a frame of various equipment having a vibration source. It is characterized in that vibration energy is efficiently absorbed by being attached to a location and adding a large mass in a concentrated manner.

Further, the damping body according to the present invention includes a damping body made of a material having a relatively high density and a damping body provided integrally or separately on the mounting surface side of the damping body. A seating portion formed to have a smaller diameter than the outer diameter of the main body,
It is characterized in that the vibration damper body is attached to a predetermined position of a frame of various equipment having a vibration source through the seat portion.

[0011]

First, the vibration damping method according to the present invention efficiently absorbs vibration energy by adding a large mass to a predetermined portion of the frame of various equipment having a vibration source. It is a thing. The predetermined portion of the frame is, for example, a portion where the amplitude becomes the largest when the frame vibrates, and by attaching a vibration damper made of a material having a relatively high density thereto, a large mass can be obtained. The energy is added intensively to efficiently absorb the vibration energy.

Further, the vibration damper according to the present invention comprises a vibration damper body and a seat portion, and is attached to a predetermined portion of a frame of various equipment having a vibration source through the seat portion. The damping body is manufactured from a material with a relatively large mass, and is attached via a seating part with a relatively small diameter, which is an effective configuration for adding a large mass in a concentrated manner. There is.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first embodiment of the present invention will be described below with reference to FIGS.
An example will be described. Incidentally, the same parts as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted. First, the damping body 101 according to the present embodiment has a structure as shown in FIGS. The damping body 101 is a disk-shaped damping body 102.
The central portion of the vibration damper body 102 has a stepped structure. That is, in the central portion, the upper surface side is depressed to form the recessed portion 103, and the lower surface side is provided to project to form the seating portion 105. In addition, a hole 1 through which a fixing screw (shown in FIG. 3) 107 is inserted in the center portion.
09 are formed.

The damping body 101 is made of a material having a high density, for example, brass. Other than brass, any material with a relatively high density may be used, such as steel plate, lead,
Some kind of plastics is considered. Also, the seat 1
The outer diameter (d ₁ ) of 05 is smaller than the outer diameter (d ₂ ) of the vibration damper body 102. This is because it is intended to add large masses intensively. Also, the fixing screw 10
When it is fixed by 7, the head portion of the fixing screw 107 fits into the concave portion 103, so that unnecessary protrusion of the head portion is prevented.

The damping body 101 of this embodiment is made of a material having a relatively high density, and is made as narrow as possible by a seat portion 103.
So that it contacts and is fixed to the frame base 1 via
Thereby, a large mass is intensively added to enhance the vibration damping effect. Specifically, when the frame base 1 vibrates, the damping body 101 is attached to the place where the amplitude becomes the largest to concentrate the additional mass, efficiently absorb the kinetic energy due to the vibration, and effectively damp the vibration. It is what makes them.

Next, a case where the vibration damper 101 of this embodiment is actually attached will be described. First, as shown in FIG. 3, the vibration damper 101 according to this embodiment is fixed to an arbitrary position on the frame base 1 of the serial printer. In the fixed state, as shown in FIG. 2, the seat portion 105 comes into contact with the frame base 1, and the other portions are separated from the frame base 1. Thereby, a large mass is intensively applied via the narrow contact.

The number of the frame bases 1 and the number of the frame bases 1 to be mounted differ depending on the printer model and the like.
For the printer of any model, the optimum location may be selected while measuring the vibration damping effect, and the printer may be mounted there. Also, when the model is changed, the mounting location will be decided by the same method.

According to this embodiment, the following effects can be obtained. First, the damping effect can be enhanced. This is not to add the mass with a wide contact area over a wide range as in the past, but to concentrate on the areas where the vibration energy can be absorbed efficiently (the areas where the vibration amplitude is the largest). This is because it is configured to be added. Therefore, it has become possible to effectively suppress the generation of noise. Specifically, as a result of measuring the noise 1 m ahead of the serial printer, the noise could be reduced by 6 dB.

Further, the conventional damping plates 33 and 35 (shown in FIG. 6) are relatively large and occupy a large mounting area, but in the case of this embodiment, Since it is made of a material having a large mass, it is relatively small and does not occupy a large mounting area. Therefore, it has less influence on other devices, is convenient in layout, and is easy to color. For example, by using the same color as the frame base 1, it is possible to eliminate discomfort in design. Is. . Further, there is no need to worry about temperature dependence, flammability, oil resistance, etc. as in the case of conventional rubber. Further, in terms of manufacturing, it is possible to use a method such as press working of a metal plate or plastics molding, so that the manufacturing cost can be reduced.

Further, the damping body 101 of this embodiment has a seat portion 10
5 is provided in a protruding manner, and is brought into contact with and fixed to the frame base 1 through the seat portion 105, which is extremely convenient for intensively adding a large mass. Furthermore, since the head of the fixing screw 107 does not fit into the recess 103 and bulges upward unnecessarily, interference with other devices is reduced.

Next, a second embodiment will be described with reference to FIG. The damping body 201 according to this embodiment is made of a steel plate and has a disk-shaped damping body 202 and a damping body 20.
2 is composed of a disk-shaped magnet 203 as a seating portion embedded in the central portion on the lower surface side. The magnet 203 is in a state of partially projecting to the lower surface side. Then, it is attracted and fixed to an arbitrary portion of the frame base 1 via the magnet 203. At that time, an adhesive may be used together. Therefore, also in the case of this embodiment, the same effect as in the case of the first embodiment can be obtained.
Further, when the fixing is performed only by the attraction by the magnet 203, there is an advantage that the fixing work is easy and the fixing portion can be easily changed.

Next, a third embodiment will be described with reference to FIG. The vibration damping body 301 according to this embodiment has a disk-shaped vibration damping body main body 302 made of a steel plate, and a fixing screw 303 is inserted in the center of the vibration damping body main body 302. A hole 305 is formed. The vibration damper body 302 is fixed on the frame base 1 with a washer 307 as a seating portion interposed. That is, the seating portion 105 of the first embodiment and the magnet 20 of the second embodiment.
Instead of 3, a separate washer 307 is used. Therefore, also in this case, the same effect as in the case of the first and second embodiments can be obtained. Further, since the vibration damper main body 302 may be a simple disk, there is an advantage that the processing is easy.

The present invention is not limited to the above embodiments. First, the structure of the vibration damping body is not limited to that shown in the drawings, and various shapes such as a rectangle, a quadrangle, a triangle, etc. are assumed, for example, instead of a disk shape. Also, as the mounting method, in addition to those already described, spot welding,
Riveting or fixing by caulking may be used.

[0024]

As described above in detail, according to the vibration damping method of the present invention, a large mass is concentratedly applied to a predetermined portion of the frame so that the vibration energy is efficiently absorbed. The effect can be improved and the noise can be effectively reduced. Further, according to the vibration damping body of the present invention, the vibration damping body has a structure which is convenient for intensively adding a large amount of mass, so that it is possible to facilitate the implementation of the above-described vibration damping method and make it more effective. ..

[Brief description of drawings]

FIG. 1 is a plan view of a vibration damping body showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the vibration damping body showing the first embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of a serial printer with a vibration damper attached thereto in the first embodiment of the present invention.

FIG. 4 is a view showing a second embodiment of the present invention and is a cross-sectional view of a vibration damper.

FIG. 5 is a cross-sectional view of the vibration damping body showing the third embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of a serial printer in a state in which a vibration damping plate is attached, showing a conventional example.

[Explanation of symbols]

 1 Frame Base (Frame) 17 Drive Motor (Vibration Source) 101 Vibration Suppressor 102 Vibration Suppressor Main Body 105 Seating Part

Claims (2)

[Claims] 1. A vibration damper manufactured from a material having a relatively high density is attached to a predetermined position of a frame of various equipment having a vibration generation source so as to intensively add a large amount of mass, thereby providing vibration energy. A vibration control method characterized by efficient absorption. 2. A vibration damper body manufactured from a material having a relatively high density, and a small diameter with respect to the outer diameter of the vibration damper body, which is provided integrally or separately on the mounting surface side of the vibration damper body. And a seating portion formed on the seat, and the main body of the damping body is attached to a predetermined position of a frame of various devices having a vibration source through the seating portion.