JP2005061566A - Vibrationproofing mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibrationproof mounting of excellent vibrationproof performance that can be manufactured cheaply. <P>SOLUTION: This vibrationproof mounting is constituted so that the first sleeve 12 connected to the support side 2 through screw 14 and the second sleeve 13 connected to the supported side 3 through a screw 15 are laid down alternately at fixed intervals in a plate-like elastic body 11 of a rubber-like flexible material. A spring fixed number of the plate-like elastic body 11 is low and an excellent vibration absorption performance exhibits between the first sleeve 12 and the second sleeve 13. The first sleeve 12 and the second sleeve 13 are attached to mounting holes 112, 113 of the plate-like elastic body 11 without adhesive and the flange parts 12b, 13b are inserted into the above mounting holes 112, 113 in the retaining condition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an anti-vibration mount that anti-vibrates and supports a vibrating body that generates vibration when driven, such as a stepping motor.

Stepping motors are used for paper feeding for facsimiles, copying machines, etc., and for servo driving of printer print heads and paper feeding. Since this stepping motor generates vibration during driving, the above-mentioned facsimiles, etc. It is attached to the bracket inside the fuselage via the anti-vibration mount. And as this kind of anti-vibration mount by a prior art, what was described in following patent document 1 or patent document 2 is known.
JP 2001-37151 A 6-14583

  Among them, the conventional vibration-proof mount described in Patent Document 1 includes one mounting plate that is fastened to an internal frame of a machine body such as a copying machine by a screw, and a seating flange such as a stepping motor that is disposed opposite to the mounting plate. A ring-shaped elastic body made of a rubber-like elastic material is integrally vulcanized and bonded to the other mounting plate that is fastened with a screw. In other words, vibration generated during driving of the stepping motor is absorbed and insulated by deformation of the elastic body between the mounting plate on the seating flange side and the mounting plate on the body side, and the vibration is transmitted to the body side. It is to reduce.

  On the other hand, in the conventional vibration-proof mount described in Patent Document 2, a cylindrical rubber body is formed at a plurality of locations on the outer edge of a flat rubber body, and a stopper cylinder body into which a fastening bolt can be inserted. And a structure in which a nut screwed with the tightening bolt is embedded. That is, in the vibration-proof mount, the stopper cylinder is inserted into a mounting hole provided in a bracket or the like on the body side, and a tightening bolt inserted from a seating flange of a stepping motor or the like into the stopper cylinder is screwed into the nut. Thus, the cylindrical rubber body is compressed between the seating flange and the bracket on the airframe side, and the deformation operation of the cylindrical rubber body absorbs and insulates vibrations of the stepping motor and the like, to the airframe side. It reduces vibration transmission.

  However, according to the anti-vibration mount described in Patent Document 1, since the elastic body has a structure that is vulcanized and bonded to both of the mounting plates, the surface of the bonding surface of the metal mounting plate is subjected to ground treatment in the manufacture thereof. And a process such as application of an adhesive is necessary, and a post-process such as a rubber burr removing operation is generated, and the structure of the molding die is complicated, resulting in a high manufacturing cost. In addition, the area of adhesion between the mounting plates and the elastic body, that is, the restrained area to the elastic body is large, which increases the spring constant and makes it difficult to obtain excellent vibration absorption.

  Further, according to the vibration-proof mount described in Patent Document 2, the cylindrical rubber body that absorbs vibration is tightened by the tightening bolt and the nut, so that the tightening amount is limited by the stopper cylinder, but the cylindrical rubber body When the body is compressed, the spring constant increases, and it is difficult to obtain excellent vibration absorption. Moreover, generally, as in Patent Document 1, one of the anti-vibration mounts is attached to the motor side, and the other is attached to the machine body by screws. To adopt different anti-vibration mounts, it is necessary to change the specifications of the motor's seat flange and the fuselage side bracket.

  The present invention has been made in view of the above points, and a technical problem thereof is to provide an anti-vibration mount that is excellent in anti-vibration performance and can be manufactured at low cost.

  As a means for effectively solving the above technical problem, a vibration isolating mount according to the invention of claim 1 is a plate-like elastic body made of a rubber-like elastic material and has a screw on one of a support side and a supported side. A first sleeve coupled via a screw and a second sleeve coupled to the other of the supported side and the supported side via a screw are alternately embedded at a predetermined interval.

  According to a second aspect of the present invention, in the vibration isolating mount according to the first aspect, the first sleeve and the second sleeve are formed in the attachment hole of the plate-like elastic body at the flange portion formed at the end thereof. It is fitted in a retaining state.

  According to the vibration-proof mount according to the first aspect of the present invention, the plate-like elastic body is coupled to the portion on which the first sleeve coupled to the support side via the screw is embedded, and to the supported side via the screw. Since the second sleeve is restrained only by the embedded portion, the portion between the first sleeve and the second sleeve has a low spring constant, and excellent vibration absorption can be achieved.

  According to the vibration isolating mount of the first aspect of the invention, in addition to the effect of the first aspect, the first sleeve and the second sleeve can be attached in the attachment hole of the plate-like elastic body in a non-adhesive manner. Can be provided at low cost.

  Hereinafter, preferred embodiments of the vibration-proof mount according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an anti-vibration mount 1 according to this embodiment together with a supported stepping motor 3 and a support-side frame 2, and FIG. 2 shows the anti-vibration mount 1 according to this embodiment. Is a view seen from a direction parallel to the axis, (B) is a cross-sectional view taken along the line BB ′ in (A), and FIG. 3 shows a state in which the stepping motor 3 is attached via the vibration-proof mount 1 according to this embodiment. FIG. 3 is a cross-sectional view cut at a position corresponding to the line BB ′ in FIG.

  First, in FIG. 1, reference numeral 1 is an anti-vibration mount according to the present invention, reference numeral 2 is a frame inside a machine such as a copying machine, and reference numeral 3 is a stepping motor attached to the frame 2 via the anti-vibration mount 1. . As shown in FIG. 2, the anti-vibration mount 1 includes a plate-like elastic body 11 and first sleeves 12 and second sleeves 13 embedded in the circumferential direction alternately. The frame 2 corresponds to the support side described in claim 1, and the stepping motor 3 corresponds to the supported side described in claim 1.

  The plate-like elastic body 11 is made of a rubber-like elastic material. As shown in FIGS. 1 and 2, the plate-like elastic body 11 has a circular opening 111 at the center and has a substantially square-shaped outer edge. Molded. The first sleeve 12 and the second sleeve 13 are located near the four corners of the plate-like elastic body 11 and are embedded alternately. That is, the first sleeve 12 and the second sleeve 13 are provided in pairs, the first sleeves 12 and 12 are arranged at one diagonal position in the plate-like elastic body 11, and the second sleeves 13 and 13 are the other pair. It is arranged at the corner position.

  As shown in FIGS. 1 and 3, each of the first sleeves 12 and 12 is coupled to the frame 2 on the support side via a screw 14 and is made of a metal or a hard synthetic resin material. A female screw hole 12a that can be screwed into the shaft portion 14a of the screw 14 is formed on the inner periphery by tapping, and a flange portion 12b is formed at one end in the axial direction, and a cylindrical portion 12c is formed at the other end. The first sleeve 12 is inserted and arranged in a first mounting hole 112 formed in a stepped shape so as to have a large diameter on the first surface 11a side that is the stepping motor 3 side in the plate-like elastic body 11, The portion 12b is fitted in the annular stepped portion in the first mounting hole 112 in a retaining state, and the end portion of the opposite cylindrical portion 12c is on the frame 2 side of the plate-like elastic body 11. It is exposed on the two surfaces 11b.

  The frame 2 has a circular opening 2 a corresponding to the opening 111 of the plate-like elastic body 11, and the shaft portion 14 a of the screw 14 is located at a position corresponding to each first sleeve 12 in the vibration isolation mount 1. A pair of screw insertion holes 2b through which can be inserted is opened.

  On the other hand, each of the second sleeves 13 and 13 is coupled to a seating flange 31 of the stepping motor 3 on the supported side via a screw 15 and is made of a metal or a hard synthetic resin material. A screw insertion hole 13a through which the shaft portion 15a of the screw 15 can be inserted is formed, and a flange portion 13b is formed at one end in the axial direction, and a cylindrical portion 13c is formed at the other end. And this 2nd sleeve 13 is inserted and arrange | positioned in the 2nd attachment hole 113 formed in the plate-shaped elastic body 11 so that it may become large diameter by the 2nd surface 11b side, The collar part 13b is the said part. The annular stepped portion in the second mounting hole 113 is fitted in a retaining state, and the end of the opposite cylindrical portion 13 c is exposed on the first surface 11 a of the plate-like elastic body 11.

  In the seating flange 31 of the stepping motor 3, a pair of female screw holes 31 a that can be screwed with the shaft portion 14 a of the screw 15 are provided at positions corresponding to the second sleeves 13 in the vibration isolation mount 1. .

  The first sleeve 12 and the second sleeve 13 may be set in a mold for vulcanizing and molding the plate-like elastic body 11 and embedded at the same time as the plate-like elastic body 11 is formed. After vulcanization molding, the first mounting hole 112 and the second mounting hole 113 may be inserted. The first sleeve 12 and the second sleeve 13 are prevented from coming off when their flanges 12b and 13b are fitted to the first mounting hole 112 and the second mounting hole 113. When the first sleeve 12 and the second sleeve 13 are embedded at the same time as the molding, there is no need for vulcanization adhesion, and therefore, there is no need for a step such as a base treatment or adhesive application, and the production can be performed at low cost.

  In order to attach the stepping motor 3 to the frame 2 via the anti-vibration mount 1 having the above-described configuration, the screw of the second sleeve 13 from the opening of the second attachment hole 113 on the second surface 11 b side of the plate-like elastic body 11. The shaft portion 15a of the screw 15 is inserted into the insertion hole 13a, and the shaft portion 15a is screwed into the female screw hole 31a of the seating flange 31 of the stepping motor 3, whereby the vibration isolating mount 1 is first attached to the seating flange of the stepping motor 3. Attach to 31. At this time, the seating surface of the head portion 15b of the screw 15 is in pressure contact with the flange portion 13b of the second sleeve 13, and the cylindrical portion 13c of the second sleeve 13 is in pressure contact with the seating flange 31, whereby the screw 15 is screwed. Since the amount is regulated, the plate-like elastic body 11 is not subjected to compression. Further, the head 15 b of the screw 15 is accommodated in the opening of the second mounting hole 113.

  Next, the shaft portion 14 a of the screw 14 is inserted into the screw insertion hole 2 b of the frame 2, and the shaft portion 14 a is exposed to the second surface 11 b of the plate-like elastic body 11 in the vibration isolating mount 1. 3 is screwed into the female screw hole 12a, the attachment state shown in FIG. 3 is obtained. At this time, the seat surface of the head portion 14b of the screw 14 is in pressure contact with the frame 2, and the cylindrical portion 12c of the first sleeve 12 is in pressure contact with the frame 2 from the side opposite to the head portion 14b, so that the screw 14 is screwed. Since the amount is regulated, the plate-like elastic body 11 is not subjected to compression. In addition, when the screw 14 is completely screwed to the amount regulated by the first sleeve 12, the length of the shaft 14 a of the screw 14 does not interfere with the seating flange 31 of the stepping motor 3. Is stipulated.

  In this attached state, the output shaft 32 of the stepping motor 3 is inserted into the inner periphery of the opening 111 of the plate-like elastic body 11 and the opening 2a of the frame 2 that are overlapped with each other, and is transmitted to a power transmission mechanism (not shown) or the like. Connected. Further, the head 15 b of the screw 15 is accommodated in the opening of the second mounting hole 113 so that it does not interfere with the frame 2.

  As can be seen from the mounting state shown in FIG. 3, the vibration-proof mount 1 is fixed to the frame 2 side at one diagonal position and to the stepping motor 3 side at a diagonal position orthogonal thereto by screws. These are the same as a general attachment form like patent document 1 (Unexamined-Japanese-Patent No. 2001-37151) demonstrated previously. Therefore, it is not necessary to change the specifications of the seating flange 31 of the stepping motor 3 or the frame 2 on the airframe side by adopting the anti-vibration mount 1 according to the illustrated form.

  3, a portion between a fixing portion to the frame 2 by the first sleeve 12 and the screw 14 and a fixing portion to the seating flange 31 of the stepping motor 3 by the second sleeve 13 and the screw 15, That is, the flexible portion indicated by reference numeral 114 in FIGS. 1 and 2 in the plate-like elastic body 11 is not fixed to the frame 2 or the seating flange 31, so that the degree of freedom of deformation is large, and the spring constant. Is low. Therefore, the vibration generated by the driving of the stepping motor 3 is effectively absorbed by the deformation of the flexible portion 114, and the vibration transmission to the frame 2 of the airframe can be remarkably reduced.

  Note that the present invention is not limited to the illustrated embodiment. For example, on the contrary to the form shown in the figure, the mounting hole formed in the frame 2 is a female screw hole, and the mounting hole formed in the seating flange 31 of the stepping motor 3 is not tapped. The first sleeve 12 with the inner periphery tapped is fixed to the seating flange 31, and the second sleeve 13 with the inner periphery not tapped is fixed to the frame 2. In this case, the screwing direction of the screws 14 and 15 is also opposite to that shown in the figure.

1 is a perspective view showing a preferred embodiment of an anti-vibration mount 1 according to the present invention together with a supported side stepping motor 3 and a support side frame 2. FIG. 1A and 1B show an anti-vibration mount 1 according to the embodiment of FIG. 1, in which FIG. 1A is a view seen from a direction parallel to an axis, and FIG. 1B is a cross-sectional view taken along line B-B ′ in FIG. FIG. 3 is a cross-sectional view showing a state in which the stepping motor 3 is attached via the anti-vibration mount 1 according to the embodiment of FIG. 1 cut at a position corresponding to the line B-B ′ of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anti-vibration mount 11 Plate-shaped elastic body 11a 1st surface 11b 2nd surface 111, 2a Opening part 112 1st attachment hole (mounting hole)
113 Second mounting hole (mounting hole)
114 Flexible portion 12 First sleeve 12a, 31a Female screw hole 12b, 13b Cone portion 12c, 13c Cylindrical portion 13 Second sleeve 13a, 2b Screw insertion hole 14, 15 Screw 14a, 15a Shaft portion 14b, 15b Head 2 Frame (Support side)
3 Stepping motor (supported side)
31 Seating flange

Claims (2)

  A first sleeve (12) coupled to a plate-like elastic body (11) made of a rubber-like elastic material to one of a support side (2) and a supported side (3) via a screw (14); The anti-vibration mount, wherein the second sleeve (13) coupled to the other of the support side (2) and the supported side (3) via the screw (15) is alternately embedded at a predetermined interval.   The first sleeve (12) and the second sleeve (13) are prevented from coming off in the mounting holes (112, 113) of the plate-like elastic body (11) at the flanges (12b, 13b) formed at the ends thereof. The anti-vibration mount according to claim 1, wherein the anti-vibration mount is attached to the anti-vibration mount.

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