JPH0237809B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an apparatus for simultaneously forming and bonding a tension ring to a container lid.

<Background Art> Recently, containers have been developed in which a tear weakening line extending from a tear-off tab protruding from the skirt portion of the container lid all the way to the top surface is provided on the container lid body, and the container can be easily opened by pulling the tear-off tab. Lids are popular. When opening this type of container lid, it is necessary to apply considerable force to pull up the tear-off tab. is facilitated.

However, a relatively long tear-off tab has the disadvantage that a lot of material is wasted when the container lid is preformed from sheet metal, which increases the manufacturing cost of the container lid. In addition, when attaching a tension piece to the tear-off tab on a container lid, it has traditionally been
Connections are made by means such as riveting or clamping, but these methods require a lot of time and effort during the manufacturing process, and the manufacturing cost increases.
The connection part is fragile and there is a risk of it being severed before the package is opened.

In order to solve the above-mentioned problems, a substantially cylindrical pre-formed body is formed, and the free end of the tear-off tab of the container lid and a part of the pre-formed body are able to overlap with each other. positioning the container lid and the preformed body, and then curling the peripheral edge of the preformed body in the radial direction to form a ring, and rolling the tear-off tab into the ring to join the two; A manufacturing method and device for manufacturing container lids with tension rings were proposed by Wikanders in Sweden, and a patent application has been filed (patent application).
No. 58-13855 (see JP-A-59-144536) and Japanese Patent Application No. 58-13856 (see JP-A-59-144537). In this type of container lid with a tension ring, the molding of the container lid is carried out by a preform forming means that forms a substantially annular preform, and a position where the preform is joined to a tear-off tab of the container lid. A pre-formed body supplying means, a container lid supplying means for supplying a container lid, and a tension ring forming means for forming the pre-formed body butted against the tear-off tab of the container lid into a tension ring and simultaneously joining this to the container lid. and a coupling means;
This is easily accomplished by an apparatus basically constructed from.

In such a case, in order to obtain a container lid with a tension ring with stable quality at low cost, a substantially cylindrical annular preform is formed at a sufficiently high speed, and the formed preform is used as a tension ring at a sufficiently high speed. It is required to be molded and sufficiently securely bonded to the tear tab of the container lid.

Therefore, in order to satisfy the above-mentioned requirements, the applicant improved the apparatus for forming and joining a container lid with a tension ring having the above-described configuration, and formed and joined the tension ring at a sufficiently high speed and with sufficient strength. proposed a device that can simultaneously form a tension ring and bond it to a container lid. This device includes a preform forming means for shearing and simultaneously bending strips from a thin metal plate to form a substantially cylindrical annular preform; positioning the container lid and the preformed body so that the parts are overlapped with each other;
Preformed body forming means includes a tension ring forming and connecting means for radially curling the peripheral edge of the preformed body to form a ring, and for winding the tearing tab into the ring and joining the two; has a stationary shearing tool having a stationary shearing blade located at a predetermined shearing position, and a movable shearing blade located on a rotating support, which cooperates with the stationary shearing blade to cut a thin metal sheet from one edge to the other. The movable shearing tool is configured to gradually shear toward the end and curve in the width direction. (For example, see Japanese Patent Application Laid-open No. 59-191530.) However, in the above-mentioned apparatus, (1) In order to form a preformed body in the desired shape, the stationary shearing blade of the stationary shearing tool and the movable shearing tool are required at the shearing position. It is important to maintain the interval between the movable shearing blades of the tool at a predetermined value, but it is difficult to set the interval between the stationary shearing blade and the movable shearing blade to a predetermined value. (2) Preforming In order to form a body at high speed, it is necessary to rotate the rotary support body provided with the movable shearing tool at high speed, but in such a case, the rotary support body shakes and the movable shearing blade and the stationary shearing blade are separated. There are disadvantages such as the predetermined interval set between the two being distorted, and due to this, it is not possible to stably form a preformed body having a desired shape.

<Object of the invention> The present invention has been made in view of the above facts, and its main purpose is to easily set the interval between the stationary shearing blade and the movable shearing blade to a predetermined value, and to It is an object of the present invention to provide a device for forming and simultaneously bonding a metal tension ring to a container lid, with a preform forming means capable of preventing swinging of a rotary support on which blades are provided.

<Summary of the Invention> According to the present invention, there is provided a preform forming means for forming a substantially cylindrical annular preform by shearing and simultaneously bending a strip from a thin metal plate, and a free end of a tear-off tab of a container lid. The container lid and the preformed body are positioned so that the part of the preformed body and a part of the preformed body overlap each other, and the peripheral edge of the preformed body is curled in the radial direction to form a ring. a tension ring forming and joining means for forming a metal tension ring into a container lid and rolling the tear-off tab into the ring to join the two together; The body forming means includes a stationary shearing tool provided on a fixed second support and having a stationary shearing blade positioned at a predetermined shearing position, and a second shearing tool that is movable and rotatable relative to the second support. a movable shearing blade provided on one support; in the shearing position;
A movable movable member configured to cooperate with the stationary shearing tool to gradually shear the tip of the thin metal plate in the longitudinal direction from one side edge to the other side edge, and to curve it in the width direction to form a substantially cylindrical ring shape. Moving the shearing tool and the first support relative to the second support causes the movable shearing tool to move relative to the stationary shearing tool to lower the shearing tool in the shearing position. An adjustment means for adjusting the distance between the movable shearing blade and the stationary shearing blade, and provided on the fixed second support to prevent vibration caused by rotation of the first support in a predetermined direction. Equipped with an anti-shake mechanism for
An apparatus is provided which is characterized in that:

<Preferred Specific Example of the Invention> Hereinafter, a specific example of an apparatus configured according to the present invention will be described with reference to the accompanying drawings.

First, the overall basic structure of the apparatus according to the present invention will be explained with reference to FIG. Means 16;
A container lid transfer means 18 and a bond reinforcement means 20 are provided. The outline of each of these means is as follows.

The pre-formed body forming means 10 is a substantially cylindrical shape in which a strip is cut from a strip-shaped thin metal plate made of chromic acid treated steel, tin plate, aluminum alloy, etc., and simultaneously curved in the longitudinal direction and both ends of the strip are overlapped with each other. An annular preform is formed. Next, the preformed body supply means 12 (described later) receives the preformed body formed by the preformed body forming means 10 in the holding areas A and B, conveys it in the direction shown by the arrow, and transports the preformed body in the direction shown by the arrow. Transport to receiving area C. On the other hand, container lid supply means 1
4 receives the container lid in the holding area D, conveys it in the direction shown by the arrow, and conveys it to the container lid receiving area E. The tension ring forming and joining means 16 receives the preform from the preform supply means 12 in the preform receiving area C, conveys it in the direction shown by the arrow, and then transfers the preform to the container lid supply means in the container lid receiving area E. receiving a container lid from 14 and positioning the container lid and preform as desired so that the free end of the tear tab of the container lid and a portion of the preform are in mutually overlapping relationship; Thereafter, the tear-off tab of the container is curved as required in the bending area F, and then the peripheral edge of the pre-formed body is curled in the radial direction in the tension ring forming and joining area G to form a ring, and the container lid is formed. The tear-off tab is rolled into this ring to connect the two, and the ring is transported to the discharge area H. Further, the container lid moving means 18 receives the container lid to which the tension ring is attached from the tension ring and coupling means 16 in the discharge area H, conveys it in the direction of the arrow, and carries it out to the transfer area I. Bonding reinforcement means 20
receives the container lid to which the tension ring is attached from the container lid transfer means 18 in the transfer zone I, transports it in the direction of the arrow, and in the pressurized deformation zone J, tears off the container lid and part of the tension ring. After applying pressure and deformation to the mutually wrapped joints to strengthen the joints, the joints are transported to the delivery area K.

The configurations and effects of each of the above-mentioned preformed body supply means 12, container lid supply means 14, tension ring forming and joining means 16, container lid transfer means 18, and joint reinforcement means 20 are described in the application filed by the present applicant. Japanese Patent Application No. 58-65286 (see Japanese Patent Publication No. 62-38054), Japanese Patent Application No. 58-65287 (see Japanese Patent Publication No. 63-33931), and Japanese Patent Application No. 58-65288 (see Japanese Patent Publication No. 63-33931).
33932), Japanese Patent Application No. 58-65289 (Japanese Patent Application No.
59-191527) and Japanese Patent Application No. 58-65290 (see Japanese Patent Application Laid-open No. 59-191534).

Next, the above-mentioned preformed body forming means 10 will be explained in detail with reference to FIGS. 2 to 5.

In FIGS. 2 and 3, the illustrated preformed body forming means 10 has a support shaft 22 extending in the vertical direction.
A first support body 24 is rotatably mounted on this support shaft 22. In a specific example,
As shown in FIG. 3, a shoulder is formed on the upper part of the support shaft 22, and a locking member 28 is mounted below this shoulder. Then, the shoulder portion and the locking member 2
8, a pair of bearing members 30 are installed at intervals in the vertical direction, and the first support body 24 is installed via the pair of bearing members 30. This first
A sleeve member 32 is further fixed to the support body 24, and the sleeve member 32 is arranged between the pair of bearing members 30. With this structure, the first support body 24 is rotatable with respect to the support shaft 22, but does not move vertically relative to the support shaft 22.

As shown in FIG. 2, the first support body 24 has a plurality of protrusions 3 on its peripheral edge at intervals in the circumferential direction.
4 (six pieces are provided in the specific example), and a movable shearing blade 36 of a movable shearing tool is attached to each of the protrusions 34. In a specific example, the top surface of each projection 34 is somewhat lower than the top surface of the base of the first support 24, and a movable shearing blade 36 is attached to the top surface of each projection 34 by a mounting screw 38. There is. Referring to FIG. 3, a large gear 40 is further fixed to the lower end of the periphery of the first support 24 by a mounting screw 42. As shown in FIG. This large gear 40 is meshed with an output gear 44 fixed to the output side of a drive source (not shown) such as an electric motor for driving the preformed body forming means 10. As shown above, the driving source (not shown)
The driving force from is transmitted to the first support 24 via the output gear 44 and the gearwheel 40, and thus the first support 24, and thus the movable shearing blade 36 of the movable shearing tool, moves in the direction of the arrow 46 (the second It is rotated in the direction shown in the figure).

A support substrate 48 is disposed below the first support body 24, as shown in FIG. Support substrate 4
An opening is formed in 8, and a support member 50 is fixed to the opening with a mounting screw 52. The support member 50 supports the lower part of the support shaft 22 together with the support sleeve 54 . In a specific example,
Key grooves are formed in the inner circumferential surface of the support member 50 and the lower outer circumferential surface of the support shaft 22, respectively, and the key member 56 is inserted into the key grooves. Therefore, the support shaft 22 is prevented from rotating by the key member 56.

Furthermore, a second support 58 is arranged above the first support 24 . In a specific example,
The second support body 58 is composed of a support plate, and is attached (fixed) to the support substrate 48, although not shown. An opening 60 is provided at a predetermined position of the second support 58, that is, at a shearing position corresponding to the preform holding area indicated by the symbol A (or B) in FIG. A cooperating stationary shearing tool 62 is fixed. Stationary shearing tool 6
As shown in FIG. 2, the stationary shear blade 64 and the stationary guide restraint member 66 each have a substantially horizontal lower surface defining a common plane. are interconnected. A guide groove extending in the vertical direction (direction perpendicular to the plane of paper in FIG. 1) is formed on the surface of the guide restraint member 66 that contacts the stationary shear blade 64, and this guide groove allows the stationary shear blade 64 to A guide slot 68 extending vertically is defined between the guide restraining member 66 and the guide restraint member 66 . The guide slot 68 has a shape corresponding to the cross-sectional shape of a strip-shaped thin metal sheet (not shown) to be sheared by the cooperation of the movable shearing tool and the stationary shearing tool 62, and the thin metal sheet is inserted through the guide slot 68. is fed from the top to the bottom.

In the preformed body forming means 10 having the above-described structure, the strip metal sheet is intermittently fed from above to below through the guide slot 68 by the action of the feeding means (not shown). Meanwhile, the first support 24 is continuously rotated in the direction shown by arrow 46 (FIG. 2). Thus, when the sheet metal is fed as described above, the movable shearing blades 36 mounted on the first support 24 sequentially cooperate with the single stationary shearing blade 64 of the stationary shearing tool 62. Shear the thin metal plate using Note that, after forming a preformed body by cooperating with the stationary shearing blade 64 and one of the movable shearing blades 36, the band-shaped metal thin plate is formed by the next movable shearing blade 36 working with the stationary shearing blade 64.
The tip portion is sent downwardly beyond the lower surface of the stationary shearing blade 64 by a predetermined distance until it cooperates with the stationary shearing blade 64. As understood from FIG. 2, the above-mentioned shearing of the thin metal sheet is performed from one end (inner end) to the other because the movable shearing blades 36 act on the thin metal sheet gradually from the inner end to the outer end in the radial direction. Shearing is carried out gradually toward the ends (outer ends), and due to the shearing force, the tip of the thin metal plate curves from one end edge toward the other side edge as the shearing progresses. When the thin metal sheet is completely sheared, the tip of the thin metal sheet forms a substantially cylindrical preformed body in which the strip is curved in its longitudinal direction and both ends are overlapped with each other. Regarding the structure and effects of the preformed body forming means 10 described above, particularly the movable shearing tool and the stationary shearing tool 62, see Japanese Patent Application No. 58-65285 (Japanese Patent Application Laid-Open No. 59-191530) filed by the present applicant. ) is substantially the same as that disclosed in the specification and drawings of .

The preformed body forming means 10 described above further includes an adjusting means for adjusting the distance between the movable shearing blade 36 and the stationary shearing blade 64 at the shearing position. Referring again to FIGS. 2 and 3, the illustrated adjusting means 70 includes a worm 72, a rotating member 74, and an operation adjusting member 76. As shown in FIG. An opening is formed in the second support body 58, and the support member 7 is provided in the opening.
8 is fixed by a mounting screw 80. This support member 78 is connected to the support shaft 2 as shown in FIG.
Support the upper end of 2. The support member 78 is integrally provided with a block portion 82.
A worm 72 is attached to the worm. In a specific example,
A substantially horizontally extending cylindrical recess 84 is formed in the block portion 82, into which a mounting screw 86 (as will be understood from the following description) is threaded into the bottom of the recess 84. The screw 86 is the worm 72
A worm 72 is attached via a worm (which also acts as a first locking means for preventing rotation of the worm). The main portion of the worm 72 (the portion located within the recess 84) is formed with a helical coil-like strip, and the tip thereof has a hexagonal cross-sectional shape. Therefore, the worm 72 is prevented from rotating when the mounting screw 86 is tightened, but becomes freely rotatable when the mounting screw 83 is loosened. The worm 72 can be rotated in a desired direction by attaching a tool (not shown) to the distal end of the mounting screw 86 and rotating it while the mounting screw 86 is loosened.

A rotating member 74 is disposed on the upper surface of the support member 78, and the lower end of the rotating member 74 is attached to the upper end of the operation adjustment member 76, which is screwed to one end of the support shaft 22. In the specific example, the operation adjustment member 76
The upper end has a rectangular cross-sectional shape, and the base of the rotating member 74 is formed with a polygonal hole 88 into which the upper end engages.
By fitting the hole 88 of No. 4, the rotating member 74
are installed as required. Therefore, the rotating member 74 is mounted so as to rotate together with the operation adjusting member 76. Teeth that engage with the threads of the worm 72 are formed at the distal end of the rotating member 74 mounted as described above, and these teeth mesh with the threads. In the specific example, a portion of the side surface of the block portion 82 facing the rotating member 74 is cut out so that the threads of the worm 72 and the teeth of the rotating member 74 can mesh with each other (see FIG. 2). (want to be). In a specific example,
Further, a member 90 for restraining upward movement of the rotation member 74 with respect to the operation adjustment member 76 is detachably attached to the upper surface of the support member 78. As shown in FIG. 2, an opening is formed in a part of the side wall of this member 90, that is, the part facing the block part 82, and the teeth at the tip of the rotating member 74 mesh with the worm 72 through the opening. ing. Further, at one end of the support shaft 22, a screw member 92 (as will be understood from the description later, a second screw member 92 for preventing rotation of the operation adjustment member 76) is inserted through the operation adjustment member 76. (constituting the locking means) is screwed on. As described above, the operation adjustment member 76
is prevented from rotating when the screw member 92 is tightened, but can freely rotate when the screw member 92 is loosened. And the screw member 9
When the worm 72 is rotated as described above in the state in which the rotation member 2 is loosened, the operation adjustment member 76 is rotated clockwise (or counterclockwise) in FIG. 2 together with the rotation member 74. As can be understood from FIG. 2, the rotation of the rotating member 74 is within a range from a position where one side thereof abuts one end of the opening of the member 90 to a position where the other side abuts the other end of the opening. It will be held in When the operation adjustment member 76 is rotated as described above, since the support shaft 22 is screwed together with the operation adjustment member 76, this causes the support shaft 22 to move upward in the vertical direction relative to the operation adjustment member 76, that is, to operate. In the direction approaching the adjustment member 76 (or downward,
i.e. away from the actuating adjustment member 76), the first support 24, which is thus provided with a movable shearing blade 36, is moved relative to the second support 58, which is provided with a stationary shearing blade 64. upward in the vertical direction, that is, a direction approaching the second support 58 (or downward, that is, a direction away from the second support 58)
will be moved to

The preformed body forming means 10 of the specific example further includes a first
A shake prevention mechanism is provided to prevent shake caused by the rotation of the support body 24 in the direction shown by the arrow 46 (FIG. 2). Referring to FIGS. 4 and 5 together with FIG. 2, in the specific example, three anti-shake mechanisms 94a, 94b, and 94c are arranged at appropriate intervals on the periphery of the second support 58. It is set up. The anti-shake mechanisms 94a, 94b, and 94c have substantially the same configuration, and the anti-shake mechanism 94a will be described in detail mainly with reference to FIGS. 4 and 5. The illustrated anti-shake mechanism 94a has a support member 96, and a pair of protrusions 98 are provided at the upper end of the support member 96 at intervals. Each of these projections 98 is formed with an elongated hole 100 that extends in the vertical direction. On the other hand, a block-shaped attachment member 102 is attached to the periphery of the second support 58 with attachment screws 104, and one side of the attachment member 102 (the outer side in the case of anti-shake mechanisms 94a and 94b) , vibration prevention mechanism 94c
In this case, a protrusion 106 is provided on the inner surface. As shown in FIG.
The mounting screws 108 are screwed into the mounting members 102 through holes 100 formed in each protrusion 98 on both sides of the projection 98, thereby allowing the mounting member 102 to be mounted in a position adjustable manner. In the specific example, the mounting member 1
A screw hole is formed in the protrusion 106 of 02 in the vertical direction, and an adjustment screw 110 is screwed into the screw hole. Since it is installed in this way, install the mounting screw 1.
By loosening 08, the support member 96 can be moved vertically along the side surface of the protrusion 106, and in this state, by rotating the adjustment screw 110, the position of the support member 96 can be accurately positioned. can do. A roller 1 is attached to the lower end of the support member 96 mounted in this manner via a shaft member 112.
14 is rotatably attached.

As shown above, the vibration prevention mechanism 94a,
Each roller 114 of 94b and 94c is connected to the large gear 40, as can be understood from FIGS. 2, 4, and 5.
The horizontality of the first support body 24 is maintained within a predetermined range through the large gear 40, and the deflection that occurs when rotating at high speed is prevented.

Next, referring mainly to FIG. 3, the effects of the preformed body forming means 10 equipped with the above-mentioned adjusting means 70 will be explained.

To adjust the distance between the movable shear blade 36 and the stationary shear blade 64 in the shearing position, first tighten the mounting screw 86.
and loosen the screw member 92. In this way, the worm 72 becomes freely rotatable, and the operation adjustment member 76 and the rotating member 74 also become freely rotatable.

Next, a tool (not shown) is attached to the tip of the worm 72 and the worm 72 is rotated. In this way, as the worm 72 rotates, the rotating member 7
4, the operation adjustment member 76 is rotated clockwise (or counterclockwise) in FIG. During such rotation, the rotation of the support shaft 22 is caused by the rotation of the key member 56.
, the rotation member 74 and the operation adjustment member 76 are rotated relative to the support shaft 22 . When the operation adjustment member 76 is rotated in this way,
The support shaft 22 is moved vertically (or downwardly) relative to the operation adjustment member 76, and the first support body 24 is moved upwardly (or downwardly) in the vertical direction relative to the second support body 58. will be moved to Thus, the distance between the movable shearing blade 36 and the stationary shearing blade 64 is adjusted. In the specific example, the amount of rotation of the worm 72 is transmitted to the operation adjustment member 76 via its thread and the teeth of the rotation member 74, and the amount of rotation of the operation adjustment member 76 is transmitted to the male threaded portion of the worm 72 and the female threaded portion of the support shaft 22. Since the configuration is such that the vibration is transmitted to the support shaft 22 via the support shaft 22 and converted into vertical movement of the support shaft 22, the above-mentioned interval can be adjusted with high precision.

When the adjustment operation described above is completed, the mounting screw 86
At the same time, tighten the screw member 92. In this way, the worm 72 is fixed to the block part 82 and the operation adjustment member 76 is fixed to the support shaft 22, so that the above-mentioned interval is reliably maintained, and the above-mentioned interval does not change even during the formation of the preform. .

<Effects of the Invention> As described above, in the preformed body forming means 10 described above, the distance between the movable shearing blade 36 and the stationary shearing blade 64 at the shearing position can be easily and accurately adjusted to a predetermined value by the adjusting means 70. In addition, the vibration prevention mechanisms 94a, 94b, and 94c can suppress vibration caused by the rotation of the first support body 24 on which the movable shearing blade 36 is provided. There is no deviation in the spacing, and a preformed body having a desired shape can be formed at high speed and stably.

[Brief explanation of drawings]

FIG. 1 is a simplified plan view showing one specific example of a device constructed in accordance with the present invention. FIG. 2 is a plan view showing the preformed body forming means of the apparatus shown in FIG. 1; Figure 3 shows
Sectional view taken along the - line in FIG. 2. FIG. 4 is a sectional view taken along the - line in FIG. 2. Fifth
The figure is a diagram showing the view from the - line in FIG. 2. 10... Preformed body forming means, 16... Tension ring forming and coupling means, 22... Support shaft, 24...
First support, 36...Movable shearing blade, 58...Second support, 62...Stationary shearing tool, 64...Stationary shearing blade, 70...Adjustment means, 94a, 94b and 94c...Wingout Prevention mechanism.

Claims (1)

[Scope of Claims] 1. A preformed body forming means for forming a substantially cylindrical annular preformed body by shearing a strip from a thin metal plate; and a free end of a tear-off tab of a container lid; The container lid and the preform are positioned so that a portion of the preform is overlapped with each other, and the peripheral edge of the preform is curled in the radial direction to form a ring. and a tension ring forming and joining means for rolling the tear-off tab into the ring and joining the two, and an apparatus for forming a metal tension ring and simultaneously joining it to a container lid; includes a stationary shearing tool provided on a fixed second support and having a stationary shearing blade positioned at a predetermined shearing position, and a first support that is movable and rotatable relative to the second support. a movable shearing blade provided on the body, in the shearing position;
A movable movable member configured to cooperate with the stationary shearing tool to gradually shear the tip of the thin metal plate in the longitudinal direction from one side edge to the other side edge, and to curve it in the width direction to form a substantially cylindrical ring shape. Moving the shearing tool and the first support relative to the second support causes the movable shearing tool to move relative to the stationary shearing tool to lower the shearing tool in the shearing position. An adjustment means for adjusting the distance between the movable shearing blade and the stationary shearing blade, and provided on the fixed second support to prevent vibration caused by rotation of the first support in a predetermined direction. Equipped with an anti-shake mechanism for
A device characterized by: 2. The preformed body forming means includes a support shaft, the support shaft is disposed so as to be movable in the axial direction, but not to be movable in the rotational direction, and the support shaft includes:
A patent claim characterized in that the first support is rotatably and axially immovably mounted, and the adjustment means is provided between the second support and the support shaft. The device according to item 1. 3. The adjusting means includes a rotating member provided on the second support body so as to be rotatable but not movable in the axial direction, and the rotating member and the support shaft are arranged so that the rotating member is rotated 3. The device according to claim 2, wherein the support shaft is connected to allow relative movement in the axial direction. 4. The adjustment means further includes a worm provided on the second support and an operation adjustment member provided so as to be able to rotate integrally with the rotation member, and the worm 4. Device according to claim 3, characterized in that the actuation adjustment member is engaged with a member and is threadedly connected to the support shaft. 5. Claim 4, wherein the adjusting means includes a first locking means for preventing rotation of the worm and a second locking means for preventing rotation of the operation adjustment member. Apparatus described in section. 6. The shake prevention mechanism includes a support member attached to the second support body in a position adjustable manner with respect to the first support body, and a support member rotatably attached to the support member. 2. The device according to claim 1, comprising rollers acting on the body.