JP5230771B2 - Anti-vibration mount - Google Patents

Description

  The present invention relates to an anti-vibration mount for preventing mechanical vibration and for supporting an anti-vibration body such as a stepping motor on an attachment body such as a housing.

  Various types of OA equipment, for example, facsimiles, printer copies, etc., in which a vibrating body such as a stepping motor is fixedly connected to a support such as a casing provided with an electronic circuit or electronic equipment with screws or the like.

  Specifically, an anti-vibration mount is known in which an elastic material such as rubber is used as the anti-vibration material, and a certain amount of strength is imparted to the skeletal structure by interposing a metal plate (for example, Patent Documents 1 and 2).

JP 2003-232403 A JP 2003-232404 A

  In the above-described prior art, Patent Document 1 has a single metal plate, and the mounting to one vibrating body through the mounting hole of the metal plate is ensured by screwing with a screw or the like. It can be fixed, but the other mounting body is made by fitting the protruding part of the elastic body fixed to the metal plate, and there is a problem in the stability of fixing, and the thickness of the elastic body is strong. We must admit that a thin structure is impossible to secure.

  Moreover, in patent document 2, since the metal plate has adopted the fitting and fixing method with respect to the elastic body, it has a half-divided structure and must be composed of four pieces of four parts. The elastic body itself also has a problem that it cannot be made thin to maintain strength.

  An elastic body that holds the tightening screw in the mounting hole with respect to the tightening screw that is fixed to the vibrating body via the elastic body is not considered at all.

  The present invention has been made paying attention to the above points, and the metal plate only needs to be a single material, and the elastic body for vibration isolation only needs to partially cover a part of the plate. The size of the metal plate can be saved as much as possible, the amount of elastic body used can be reduced, and the whole body can be made thin by providing an elastic body for vibration isolation on the inner periphery of mounting holes such as fastening screws. An object of the present invention is to provide an anti-vibration mount.

  The present invention can solve the above problems by providing the following configuration.

  (1) It has a central hole, and a mounting hole is formed on the left and right sides of a higher surface that comes into contact with one mounting body having upper and lower mounting holes and a lower surface formed through a step from this surface. An elastic body is attached to the inner peripheral surface of the left and right mounting holes, the lower surface including the inner peripheral surface, and the opposite back surface including the inner peripheral surface. An anti-vibration mount characterized in that the anti-vibration mount can be fixed by a tightening member that is in contact with the other vibration member and inserted into the mounting hole.

  (2) The anti-vibration mount according to the above (1), wherein the rigid plate can be formed with four mounting holes on the upper and lower sides and the left and right sides near the vertex of the four circumferences, and is entirely square.

  (3) The elastic body attached to the back surface and the front surface is attached to the periphery of the plate with the attachment hole as the center, and the angle formed with the center hole as the center is 45 ° or more. The anti-vibration mount according to 1) or (2).

(4) When the height h of the level difference between the higher surface and the lower surface, the thickness e of the elastic body to which the plate is attached, and the size f of the head of the tightening member inserted into the left and right mounting holes ,
h−e ≧ f
The vibration-proof mount according to any one of (1) to (3) above, wherein

  (5) The vibration-proof mount according to (1), wherein the elastic body is any one of rubber and plastic.

  (6) The attachment body attached through the upper and lower attachment holes is an electronic device provided with a drive member, and the vibration member attached through the left and right attachment holes is a stepping motor, and the stepping motor is installed from the center hole. 6. The anti-vibration mount according to any one of (1) to (5), wherein a rotation shaft of a motor is inserted so as to be connected to a part of a casing of a driving member of the electronic device.

  According to the present invention, a single plate of a hard plate such as a metal is formed with a step between a high surface and a low surface, and a mounting hole is provided above and below the central surface with a central hole in between. Attach directly to one mounting body and provide mounting holes on the left and right sides of the lower surface with a central hole in between, and cover each inner surface, front surface, and back surface with separate or continuous elastic bodies. Since the other vibration member can be fixed through the tightening member that is attached and inserted into the mounting hole, the vibration action generated by the vibration member is applied to the outer periphery of the elastic body and the tightening member covered on the back surface. There is no fear that the elastic body attached to the inner peripheral surface of the mounting hole that comes into contact with the elastic body with which the head of the tightening member abuts will be transmitted to the hard plate. Accordingly, vibration transmitted from the mounting body is not transmitted to one mounting body connected to the plate, but is transmitted to the hard plate, but the elastic body provided on the inner peripheral surface of the mounting hole, and the plate Absorbed by the elastic body covered on the front and back surfaces, transmission to the vibration member is avoided, and mechanical vibrations from both the mounts can be eliminated in a nearly complete state, and operation can be performed in a static state.

  Further, in the case of a stepping motor used as a vibrating member, the elastic body attached to the back surface is centered on the center hole for tilting and tilting operation due to the action of the driving member on the electronic device side that acts on the rotating shaft. Since the angle to be formed is 45 ° or more, the tendency to collapse is relieved by the interference elastic force of the elastic body, and the durability is remarkably enhanced.

Further, the height h of the stepped surface has a relationship between the thickness e of the elastic body covered on the surface of the plate and the size f of the head of the fastening member.
From h−e ≧ f h ≧ f + e
Therefore, if the sum of the size f of the head of the tightening member and the thickness e of the elastic body is taken into consideration, it is possible to provide a vibration isolating plate having a relatively small thickness.

  Furthermore, according to the present invention, the four mounting holes on the upper, lower, left and right sides are provided at the four-round apexes of the plate, so that the entire shape is close to a square, and the handling is simple and easy. The location is also limited because the fastening member including the inner peripheral surface of the attachment hole on the front surface and the back surface is limited to the periphery of the insertion point, and the angle around the central hole may be 45 ° or more. Since a small amount is required, it is suitable for low-cost mass production.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of an anti-vibration mount according to the present invention, where (a) is a plan view, (b) is a bottom view, (c) is a cross-sectional view taken along the line cc of the plan view, and (d) is a plan view. FIG. 4E is a cross-sectional view taken along the line dd, and FIG. 4E is a cross-sectional view taken along the line d-oc in the plan view. It is a figure which shows the actual use condition of the anti-vibration mount shown in FIG. 1, (a) is a top view, (b) is a front view, (c), (d), (e) is cc of a top view. Three examples of line enlarged sectional views are shown. It is a figure which shows the actual test state of the magnitude | size of the "falling tendency" of the vibration isolator mount which concerns on this invention, (a) is plane explanatory drawing, (b) shows front explanatory drawing. FIGS. 4A and 4B show another embodiment, in which FIG. 4A is a plan view, FIG. 4B is a bottom view, FIG. 4C is a cross-sectional view taken along the line cc of the plan view, and FIG. The figure is shown.

  An embodiment of the present invention will be described below with reference to the drawings.

  In the drawings, reference numeral 1 denotes a hard plate as a skeleton material made of a hard material such as a metal or a hard synthetic resin, which is a skeleton of the vibration-proof mount M, and the upper and lower portions in one direction are centered on the central hole 2. The upper surface S1 having the mounting holes 3 and 4 is provided to be a contact surface with the mounting body B, and to the left and right through the steps 5 and 5 having a height h from the center hole 2 to the left and right. The lower surface S2 is widened, and left and right mounting holes 6 and 7 are provided with the central hole 2 in between, and a contact side with the vibration member A on the back surface R1 side of the mounting holes 6 and 7 is configured. And the said hard plate 1 can be formed in the square provided with the center hole 2 in the center by forming the upper and lower, left and right attachment holes 3, 4, 6, and 7 near the four-round vertex. The peripheral edge of the central hole 2 is provided with a high-order surface S1 and a circumferential arc surface S1a, S1a that is flush with the circular hole 2a that faces the axis of the central hole 2.

  Reference numeral 8 is a recess formed in the back surface R1 formed by the high surface S1 and the step surface 5, 5 connecting the circumferential arc surface S1a and the low surface S2, and 9 is a low surface S2 of the hard plate 1. A pair of covered left and right elastic bodies connected across the mounting holes 6 and 7 and the back surface R1 are shown.

  Specifically, it is shown in (c), (d) and (e) of FIG. In FIG. 2 (c), the vicinity of the opening surface S 2 a of the lower surface S 2 of the mounting hole 6, 7 where the head 11 of the tightening member 10 inserted through the mounting holes 6, 7 abuts, and the inside of the mounting holes 6, 7 The case where it adheres with each one pair of elastic bodies 9, such as rubber | gum or a plastics integrally connected over the surrounding surface 12 and the back surface R1 of the plate 1, is shown.

  In addition, in the attachment location of the elastic body 9, the lower surface S <b> 2 side is illustrated with the same size as the back surface R <b> 1, but the contact location of the elastic body 9 with the head 11 of the fastening member 10 is as follows. Since it is narrow, it is not necessary to have the size shown in the figure, but in the rubber coating process with the hard plate 1, it is possible to strengthen the integrated fixing performance if the same shape as the rubber to be applied to the back surface R 1 is used. Consists of processing considerations.

  Accordingly, the pair of elastic bodies 9 attached to the upper surface S1 and the rear surface R1 of the hard plate 1 are formed symmetrically about the mounting holes 6 and 7.

  Next, in the same figure (d), while the elastic body 9 of the inner peripheral surface 12 of the mounting holes 6 and 7 is the structure provided with the discontinuous notch part 9x, in FIG. The case where the cylindrical elastic body 9a which is discontinuous independently from the elastic body 9 to be attached is applied to the inner peripheral surface 12 independently is shown.

  In the above configuration, a usage example of the vibration proof mount M will be described with reference to FIG.

  The back surface R1 side of the vibration-proof mount M is brought into contact with the elastic body 9 with one side of the vibration member A such as a stepping motor, that is, with the rotation shaft a inserted through the central hole 2, and the lower surface S2 The mounting holes 6 and 7 are made to coincide with the mounting holes of the vibration member A, the bolts of the tightening member 10 are inserted, and screwed and tightened by a screwdriver using the locking groove of the head 11.

  As a result, the elastic body 9 is brought into contact with the vibration isolating mount M via the mounting surface of the vibration member A of the stepping motor, and the elastic body 9 on the inner peripheral surface 12 of the mounting holes 6 and 7 is located around the fastening member 10. At the same time, the head 11 is also firmly in contact with the vicinity of the opening surface S2a of the lower surface S2.

  The upper surface S1 of the hard plate 1 to which the elastic body 9 of the vibration-proof mount M to which the vibration member A of the stepping motor is attached is not attached is attached to the attachment body B of the housing provided with the electronic equipment. Can be firmly fixed by the mounting holes 3 and 4.

  Since the high-order surface S1 of the hard plate 1 and the circumferential arc surface S1a formed at the periphery of the central hole 2 are flush with each other, they are directly and integrally fixed to the housing of the mounting body B. .

  Thus, the vibration member A of the stepping motor can be firmly fixed to the attachment body B constituting the electronic device via the vibration-proof mount M, and is transmitted from the rotating shaft 15 of the stepping motor via a transmission means such as a pulley and a belt. The necessary power can be supplied to the mounting body.

  The vibration action accompanying the rotation action of the vibration member A of the stepping motor is completely absorbed by the elastic body 9 of the vibration isolation mount M.

  Specifically, the elastic body 9 attached to the back surface R1 absorbs vibration of the vibration action generated from the entire vibration member A, and the inner peripheral surface 12 of the attachment holes 6 and 7 of vibration action generated from the fastening member 10 is covered. Vibration absorption by the elastic body 9 to be worn and vibration absorption of the elastic body 9 attached to the vicinity of the opening S2a of the lower surface S2 of the vibration action generated from the head 11 of the fastening member 10 are effectively and clearly performed. In other words, it is not transmitted from the hard plate 1 to the mounting body B.

  On the contrary, the vibration based on the driving action of the mounting body B is transmitted to the hard plate 1, but the vibration absorbing action of the elastic body 9 attached to the hard plate 1 works effectively and the fastening member 10. In addition, transmission to the vibration member A such as a stepping motor can be prevented and vibration can be completely prevented.

In this case, when the thickness e of the elastic body 9 covered by the back surface R1 of the lower surface S2 that is in contact with the vibrating body A and the size f of the head 11 of the fastening member 10 are set, In the case of the size h, it is necessary to have the following relationship (see FIG. 2C).
h−e ≧ f

  Next, referring to FIG. 3, a stepping motor is fixed as the vibration member A fixed to the vibration-proof mount M, and a rotary driving body such as a pulley is fixed to the rotating shaft a to attach the mounting body B to various electronic devices. With respect to the magnitude of the “falling tendency” of the vibration member A when an acting force in the arrow direction X is applied in a state where a conductive member such as a belt is incorporated, How to influence the difference in the size of the shape of the elastic body 9 will be described. A "spring spring" Y was attached to the rotating shaft a to apply a tension in the X direction, and a "gauge" Z was connected in the opposite direction of the rotating shaft a to measure the amount of displacement of the rotating shaft a.

  As a result, first, the material is examined. In the case of a soft rubber material and a hard rubber material, it has been found that the elastic body 9 made of a hard material is less likely to collapse.

  Next, the shape of the elastic body 9 is 45 ° or less with reference to the inclination angle of 45 ° with respect to the base line P-P toward the mounting hole 6 or 7 with the central hole 2 as the center. It was found that the “falling tendency” is smaller when the size is 45 ° or less than when the size is 45 ° or less.

  Therefore, according to the “falling tendency” test, the material of the elastic body 9 is preferably a hard material rather than a soft material, and the shape of the elastic body 9 is attached to the plate 1 in the widest possible area. It has been found that the elastic body 9 having a wider contact surface with the vibration member A is better, and the collapse can be minimized without deteriorating the vibration isolation characteristics.

  Table 1 below shows numerical values (bad value 1,... Good value 4) of rubber hardness, rubber inclination angle, collapse and vibration isolation characteristics.

  Next, another embodiment of FIG. 4 will be described.

  In this embodiment, the upper surface S1 in the vertical direction with the mounting holes 3 and 4 is made to be the same plane connecting the lower surface S2 spreading in the left-right direction through the steps 5 and 5, and the lower surface S2 and The elastic body 9 that is attached to the back surface R1 and is covered along the inner peripheral surfaces of the mounting holes 6 and 7 is characterized in that it is integrally formed on the outer periphery of the central hole 2.

  Since the elastic body 9 on the contact surface with the vibration member A is attached over a wide area of the back surface R1, the vibration action from the vibration member A is also effectively absorbed and transmission to the plate 1 is effectively blocked. The vibration effect transmitted from the opposite mounting body can be similarly absorbed to enhance the vibration isolation effect, and at the same time, the “falling tendency” acting on the rotating shaft a of the vibration member A can be reduced.

  In the drawing, the same components are denoted by the same reference numerals as those in the above-described embodiment, and the description thereof is omitted.

h Height of stepped surface e Thickness of elastic body f Head size a Rotating shaft M Anti-vibration mount A Vibration member B Mounting body S1 Higher surface S2 Lower surface S1a Circumferential arc surface S2a Near the opening surface R1 Back surface Y Spring burr Z Gauge 1 Hard plate 2 Center hole 2a Circular ridges 3, 4 Upper and lower mounting holes 5 Steps 6, 7 Left and right mounting holes 8 Recess 9 Elastic body 9a Elastic body 9x Notch 10 Fastening member 11 Head 12 Inner peripheral surface 13, 14 Mounting screw 15 Rotating shaft

Claims (6)

  A rigid plate that has a central hole and has mounting holes on the left and right sides of a higher surface that comes into contact with one mounting body that has upper and lower mounting holes, and a lower surface formed through a step from this surface. Then, an elastic body is attached to the inner peripheral surface of the left and right mounting holes, the lower surface including the inner peripheral surface, and the opposite back surface including the inner peripheral surface, and the other through the elastic body An anti-vibration mount characterized in that it can be fixed by a tightening member that is in contact with the vibration member and is inserted into the mounting hole.   2. The anti-vibration mount according to claim 1, wherein the rigid plate has four upper and lower, left and right mounting holes formed near the four-round apex, and is entirely square.   The elastic body attached to the back surface and the front surface is formed so as to follow the periphery of the plate with the attachment hole as a center, and the angle formed with the center hole as a center is 45 ° or more. Anti-vibration mount as described. When the height h of the step between the high surface and the low surface, the thickness e of the elastic body that adheres the plate, and the size f of the head of the tightening member inserted into the left and right mounting holes,
h−e ≧ f
The anti-vibration mount according to any one of claims 1 to 3, wherein the anti-vibration mount is provided.   2. The anti-vibration mount according to claim 1, wherein the elastic body is one of rubber and plastic.   The attachment body attached via the upper and lower attachment holes is an electronic device provided with a drive member, and the vibration member attached via the left and right attachment holes is a stepping motor, and the stepping motor rotates from the central hole. 6. The anti-vibration mount according to claim 1, wherein a shaft is inserted so that the shaft can be connected to a part of a housing of a driving member of the electronic device.

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