JPH0861429A - Vibration isolating device - Google Patents

Abstract

PURPOSE: To effectively remove rocking and vibration of a support table by reaction force by providing a stacking structure formed by alternately stacking elastomer layers having a specified hardness interposed between upper and lower end plates and rigid members. CONSTITUTION: A vibration isolating device 8 interposed between the top plate of a rack for a personal computer and a printer has three cylindrical, elliptic cylinder-like or prismatic elastomer layers 11. Each elastomer layer 11 is silicon, urethane or rubber elastomer containing an adhesive agent with ASKA C hardness of 50 deg. or less, and a rigid member 12 is interposed between the respective elastomer layers 11. Further, the device includes an upper end plate 9 and a lower end plate 10 made of a material which is excellent in adhesiveness to the elastomer and has a large coefficient of friction, and further a felt 14 is stuck to the lower surface of the lower end plate 10 not to damage the surface of the top plate 4. A hole 13 in which a support leg of an apparatus is inserted is provided in the central part of the upper end plate 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device for equipment that horizontally vibrates. For example, serial printers, line printers, and plotters for drawing in personal computers, etc. The present invention relates to an anti-vibration device that can be preferably used to prevent the horizontal vibration generated in the above from being transmitted to these supports.

[0002]

2. Description of the Related Art As an anti-vibration measure for equipment such as printers and plotters that generate horizontal vibrations, a mechanical anti-vibration rubber for supporting the equipment is installed in the mechanical part inside the equipment. It was done by attaching the supporting feet of the device having the vibration-proof function to the outer lower part of the.

[0003]

However, the conventional anti-vibration measures as described above are mainly aimed at the anti-vibration of vertical vibrations. For example, the horizontal direction generated by the operation of the print head of the printer plotter. However, there is a problem that it is not possible to sufficiently absorb or insulate the vibration.

For example, when the printer is mounted on the upper stage of a vertical type personal computer rack having a relatively small rigidity for the purpose of effectively utilizing the floor surface of the office, the printer prints. In operation, the rack sways laterally due to inertial force due to the start and stop of lateral movement of the printer head, and in particular, when the CRT resonates, the input work to the computer is interrupted. On the other hand, since the moving speed of the printer head and plotter head is becoming faster due to the demand for higher work efficiency, the inertial force generated is further increased and the above is a serious problem.

The present invention has been made as a result of studies to solve the above-mentioned problems of the prior art, and an object of the present invention is to mount a printer or plotter on a rack having a relatively small rigidity, for example. Even if the print head is arranged, or even if the print head has a large inertial force, the vibration during the printing operation is sufficiently absorbed to effectively remove the lateral movement of the rack and to place the rack. It is an object of the present invention to provide an anti-vibration device excellent in the position retention of these devices.

[0006]

The present invention has the following constitution in order to solve the above problems. That is,
An anti-vibration device which is provided between at least a device that generates vibration in a horizontal direction and a support table on which the device is installed, and which suppresses transmission of at least horizontal vibration of the device to the support table An upper end plate and a lower end plate respectively provided in the lower part, and a laminated structure in which an elastomer layer having an Asker C hardness of 50 degrees or less and a rigid member sandwiched between the upper end plate and the lower end plate are alternately laminated. A vibration-damping device provided, preferably a vibration-damping device in which an opening hole is formed in the upper part of the vibration-damping device, into which a foot for supporting a device is inserted.

Further, it is more preferable that the Asker C hardness of the elastomer layer is 10 degrees or less and that the elastomer layer is a gel elastomer because the vibration is greatly attenuated.

Further, the vibration isolator may be integrated as a whole, or a desired horizontal or vertical spring characteristic can be obtained by removably stacking the laminated structures.

[0009]

In this vibration isolator for horizontal vibration, the vibration isolator is installed between the device for generating vibration in the horizontal direction and the indicator board supporting the device to prevent vibration in the horizontal direction. It is something that is going to be absorbed.

Under such a condition, when an inertial object, such as a printer head, starts and stops moving, a head actuation reaction force opposite to the head actuation direction acts to prevent the present invention. The elastomer having an Asker C hardness of 50 degrees or less, which constitutes the vibration device, is displaced in the opposite direction while undergoing shear deformation, and such displacement is continued until the operating reaction force disappears. At this time, since this anti-vibration device has a laminated structure of an elastomer layer and a rigid member, it has a high vertical rigidity and does not cause vertical deformation, and only shear deformation, so that horizontal vibration can be efficiently performed. Absorb.

The Asker C hardness of the elastomer is 5
If it is higher than 0 degree, sufficient shear deformation to absorb vibration cannot be obtained. Furthermore, it is preferable to use a gelled elastomer having an Asker hardness of 10 degrees or less and / or a gel-like elastomer because a large attenuation can be obtained.

As described above, here, various reaction forces acting on the main body of the printer head, such as a printer head, having inertia when actuated and stopped, are generated as horizontal shear deformation of the elastomer regardless of their size. Since they are effectively absorbed, it is possible to effectively eliminate the swinging or vibrating of the support table due to the reaction forces thereof.

By providing an opening at the upper part of the vibration isolator, which is opened at the upper part into which the supporting foot of the device for generating horizontal vibration is inserted, the height of the device can be reduced and the vibration isolation between the device and the device can be achieved. The device can be more firmly fixed.

Furthermore, since the vibration isolator of the present invention can obtain desired horizontal spring characteristics by stacking several upper and lower plates and a plurality of laminated structures, it can be easily applied to various models. Is possible.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an application example of the present invention. In FIG. 1, reference numeral 1 shows a vertical personal computer rack as a support base. Here, the personal computer rack 1 includes four columns 2, a top plate 4 as a support plate for the printer 3, a shelf plate 6 as a support plate for the main body portion 5 of the personal computer, and the adjacent columns 2 And a vibration damping device 8 according to the present invention.
Is provided between the top plate 4 and the printer 3 for use.

FIG. 2 is a front view illustrating a vibration isolator of the present invention, in which a positioning mount is performed on a support base, that is, directly on a top plate 4 according to the number of supporting feet of the equipment. The cylindrical, elliptic, or prismatic elastomer layer to be placed is the three-layer vibration isolator 8. Reference numeral 11 is an elastomer layer containing an adhesive having an Asker C hardness of 50 degrees or less. As long as this condition is satisfied, a silicone-based, urethane-based or rubber-based elastomer may be used. Further, a material having a large friction loss or tan δ, for example, a gel elastomer, is preferable because the vibration can be further damped. In this example, a rubber gel elastomer having an Asker C hardness of 5 degrees and a tan δ of 0.5 was used.

12 is a rigid member and may be made of any material as long as it does not deform, but in this embodiment, SS steel having a thickness of 0.6 mm is used. The 11 elastomer layers and the 12 rigid members may be bonded chemically at the time of vulcanization, or may be separately manufactured by using an adhesive.

Reference numeral 9 denotes an upper end plate and 10 denotes a lower end plate, which may be the same as the rigid member, but a material having excellent adhesiveness with an elastomer and a large friction coefficient is preferable. Further, the felt 14 may be attached to the lower surface of the lower end plate so as not to damage the surface of the top plate 4.

Numeral 13 is a hole into which a foot for supporting the equipment is inserted, and in this embodiment, it is formed in the center of the upper end plate 9. This hole is
Even in the process of manufacturing the vibration isolator, it may be opened using a drill or the like after the manufacturing. Also, desired spring characteristics can be obtained by changing the size and depth of the hole.

FIG. 3 is a front view showing another embodiment of the present invention. In this embodiment, several horizontal laminated structures of the present invention are removably stacked to change the horizontal spring characteristics according to the characteristics of the device. Further, the laminated structure shows an example in which at least two elastomer layers and one rigid member are stacked and three layers are stacked. As the minimum unit of this anti-vibration device, the upper and lower end plates are not indispensable and may or may not be installed depending on the combination. In this embodiment, as a detachable method, holes for supporting feet of the equipment are provided in the upper and lower parts, and a detachable connecting body 15 according to the diameter of the holes is inserted and stacked together. They are fixing each other. Further, the supporting foot hole of the device may be penetrated, and one or several detachable connecting bodies 15 may be inserted and fixed therein. In the present example, the detachable connector 15 is the same as the elastomer layer 11, but the detachable connector 15 may not necessarily be the same and may be other than the elastomer. Furthermore,
The anti-vibration device to be stacked can be stacked even if it has different physical properties, materials, and thicknesses, as long as the top and bottom shapes are almost the same.

FIG. 4 shows an application example of the present invention, in which a cover 16 is used instead of or on the upper end plate 9 and serves as a stopper when an abnormally large shear deformation is applied. It is intended to fulfill the requirements and improve the appearance. As the cover material, general plastic is used. The cover is adhesively or neatly mounted on the upper elastomer layer or upper end plate.

[0022]

As is apparent from the above description, according to the present invention, various reaction forces acting on the main body portion of the printer head such as a printer head having inertia when actuated and stopped are the reaction forces of this reaction force. Regardless of size, it is effectively absorbed as horizontal shearing deformation of the laminated elastomer layers, so that swinging or vibration of the support base due to reaction force can be effectively removed.

Further, by forming a hole in the upper part of the vibration isolator for supporting the foot of the equipment that generates vibration, the height of the equipment can be reduced and the equipment and the vibration isolator can be made more rigid. It can be fixed easily and a greater effect can be obtained.

Further, by stacking a plurality of anti-vibration devices in a detachable manner, a desired spring characteristic in the horizontal direction can be obtained according to the difference in weight of the equipment.

[Brief description of drawings]

FIG. 1 is a front view showing an application example of the present invention.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a front view showing another embodiment of the present invention.

FIG. 4 is a front view on the left and a vertical cross-sectional view on the right side of the center line where a cover is attached to the present invention to improve the appearance.

[Explanation of symbols]

 1 Rack for Personal Computer 2 Support 3 Printer 4 Top Plate 5 Personal Computer Main Body 8 Vibration Isolator 9 Upper End Plate 10 Lower End Plate 11 Elastomer Layer 12 Rigid Member 13 Hole for Supporting Foot of Equipment 14 Surface Protection Felt 15 Detachable connector 16 cover

Claims (6)

[Claims] 1. A vibration control device which is provided at least between a device that generates horizontal vibration and a support base on which the device is installed to suppress transmission of at least horizontal vibration of the device to the support base. And an upper end plate and a lower end plate respectively provided on the upper and lower parts, an elastomer layer having an Asker C hardness of 50 degrees or less sandwiched between the upper end plate and the lower end plate, and a rigid member are alternately laminated. An anti-vibration device comprising: a laminated structure. 2. The anti-vibration device for horizontal vibration according to claim 1, wherein an opening hole is formed in an upper part of the anti-vibration device into which a supporting foot of a device is inserted. 3. The vibration isolation device according to claim 1, wherein the elastomer layer has an Asker C hardness of 10 degrees or less. 4. The vibration control device according to claim 1, wherein the elastomer layer is a gel elastomer. 5. The vibration isolation device according to claim 1, wherein the entire vibration isolation device is integrated. 6. The vibration control device according to claim 1, wherein the laminated structures are removably stacked.