JP6527322B2 - Cover member, method of manufacturing the cover member, and cover structure using the cover member - Google Patents

Description

  The present invention relates to a cover member that covers a gap formed between a movable portion and a non-movable portion, a method of manufacturing the cover member, and a cover structure using the cover member.

Conventionally, the inner foundation (moving part) to which the vibration equipment is attached and the outer foundation (non-moving part) formed on the outside of the inner foundation are separated, and the gap formed between the inner foundation and the outer foundation is A shaking table installation covered with a sheet member is known (for example, refer to patent documents 1).
The sheet member is disposed so as to be slackened at the center in the width direction of the gap, and the cross section of the sheet member has a substantially U shape.
According to such a vibrating table installation, the gap formed between the inner base and the outer base prevents the vibration of the vibration generating system from propagating to the outside of the vibrating base installation.
Further, according to this vibrating table installation, the sheet member covering the gap is slackened in a substantially U-shape, so that the sheet member can absorb the displacement of the inner foundation due to the vibration reaction force of the vibrating installation. That is, breakage of the sheet member due to vibration of the vibration equipment is prevented.

Japanese Patent Laid-Open No. 2000-121489

By the way, in the conventional vibrating table installation (see, for example, Patent Document 1), the planar shape of the inner base (movable part) is circular, and the gap formed around the inner base is formed in a perfect circular ring shape If so, the sheet members absorb the displacement of the inner foundation well.
However, if the planar shape of the inner base is rectangular or rounded rectangular, and the gap formed around the inner base includes a large number of portions formed in a straight line, the sheet member has sufficient displacement in the inner side. There is a problem that can not be absorbed. In particular, in the case where the excitation direction of the inner foundation coincides with the direction of the linearly extending gap, this tendency becomes remarkable. As a result, the conventional sheet member which covers such a crevice has a possibility of breaking at the time of vibration of an inner side foundation.
Therefore, even when the direction in which the gap extends and the excitation direction of the movable portion coincide with each other, a cover member that sufficiently absorbs the displacement of the movable portion is desired.

  Therefore, an object of the present invention is to sufficiently absorb the displacement of the movable portion even when the direction in which the gap formed between the movable portion and the non-movable portion extends and the vibration direction of the movable portion coincide. It is an object of the present invention to provide a cover member, a method of manufacturing the cover member, and a cover structure using the cover member.

A cover member according to the present invention, which solves the above-mentioned problems, is a cover member for covering a gap formed with a predetermined length between a movable portion and a non-movable portion, and the gap is slackened in the width direction of the gap. A plurality of first slack portions arranged in a plurality in the longitudinal direction, and a second slack portion consisting of a bag body for further slackening the cover member between the first slack portions , the bag The body is folded back along the first slack portion .

Further, in the method of manufacturing a cover member according to the present invention, which solves the above-mentioned problems, a first slack portion disposed so as to be slack in a width direction of a gap formed with a predetermined length between a movable portion and a non-movable portion And a second slack portion formed to further provide slack to the cover member from the first slack portion arranged to be slack in the gap, and the first slack portion and the second slack portion. A method of manufacturing a cover member in which a plurality of the cover members are alternately arranged in the lengthwise direction of the gap, the sheet-like main body forming the first slack portion, and the length of the gap in the main body Sheet-like edge portions formed on both sides of the direction to form the second slack portion, and an outer edge length of the edge portion defined on the opposite side of the main body portion is the length of the main body portion More than the length of the width of the body defined on the side where the edge is formed A step of a plurality preparing a cover member forming material have, and having and a step of connecting together the outer edges together along the entire length of the outer edge of the cover member forming material adjacent.

  Further, in a cover structure using the cover member of the present invention that solves the above-mentioned problems, the cover member is disposed in the longitudinal direction of the gap formed with a predetermined length between the movable portion and the non-movable portion. And the first slack portion is disposed so as to be slack in the width direction of the gap, and the second slack portion is further disposed to be slack in the gap so as to further impart slack to the cover member from the first slack portion. It is characterized in that it is formed.

  According to the present invention, the cover which sufficiently absorbs the displacement of the movable portion even when the direction in which the gap formed between the movable portion and the non-movable portion extends and the vibration direction of the movable portion coincide with each other. A member, a method of manufacturing the cover member, and a cover structure using the cover member can be provided.

(A) is a plan view of a vibration test apparatus using a cover structure according to an embodiment of the present invention, (b) is an Ib-Ib cross-sectional view of (a), (c) is an Ic of (a) -It is an Ic sectional view. It is a fragmentary perspective view showing partially a cover structure using a cover member concerning an embodiment of the present invention. It is an expanded view of the cover member of FIG. 2, and is a figure which shows a part of length direction of a cover member. It is operation | movement explanatory drawing of the cover structure at the time of a table (movable part) displacing with respect to the pit cover (non-movable part) of the vibration testing apparatus of FIG. It is an expanded view of the 1st modification of a cover member of Drawing 2, and is a figure showing a part of length direction of a cover member concerning this modification. It is an expanded view of the 2nd modification of a cover member of Drawing 2, and is a figure showing a part of length direction of a cover member concerning this modification.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
Hereinafter, a cover structure using the cover member of the present embodiment will be described by taking the vibration test apparatus having the cover structure as an example, and then the cover member and the method of manufacturing the cover member will be described.

<Vibration test equipment>
FIG. 1 (a) is a plan view of a vibration test apparatus A using a cover structure 11 according to the present embodiment, FIG. 1 (b) is a cross-sectional view taken along line Ib-Ib of FIG. ) Is a cross-sectional view taken along the line Ic-Ic of FIG. The vibration test apparatus A in this embodiment is to carry out a seismic test of a structure (not shown), and simulates an earthquake to generate vibration with a frequency of several Hz to several hundreds Hz as a structure under test. It is configured to give.

As shown in FIGS. 1A to 1C, the vibration test apparatus A includes a table 1, a support 2, a pit cover 3, and a cover structure 11.
In FIGS. 1B and 1C, reference numeral 5 is a base provided with a recess as the accommodation space 4 of the vibration test apparatus A. Incidentally, the housing space 4 is formed in a substantially rectangular parallelepiped shape having a rectangular opening at the upper side.

The table 1 is in the form of a rounded rectangle (long circle) whose both ends are semicircular in plan view (see FIG. 1A). Further, the table 1 vibrates so as to be displaced along its longitudinal direction by a vibrating mechanism (not shown).
Further, the table 1 is vertically aligned and disposed in the housing space 4 so that the upper surface thereof is positioned in the same plane as the upper surface 5 a of the foundation 5.

In FIGS. 1B and 1C, reference numeral 2 denotes a support for supporting the table 1 in the accommodation space 4.
The support 2 is disposed between the bottom of the accommodation space 4 and the bottom of the table 1. Incidentally, in the vibration test apparatus A of the present embodiment, the support 2 supports the table 1 while allowing the vibration of the table 1. In addition, in order to perform vibration of the table 1 on the support 2 more efficiently, the vibration test apparatus A has a configuration in which rolling elements (not shown) are disposed between the table 1 and the support 2. You can also.

The pit cover 3 is formed of a plate that closes the opening of the accommodation space 4 around the table 1.
The outer periphery of such a pit cover 3 has a rectangular shape in plan view in accordance with the opening of the accommodation space 4. The pit cover 3 is fixed to the base 5 so that the upper surface thereof is positioned in the same plane as the upper surface 5 a of the base 5 and the upper surface of the table 1.

Inside the pit cover 3 as described above, an opening having a rounded rectangle (long circle) larger than the outer periphery of the table 1 is formed so as to form a gap 6 having a width W around the table 1.
That is, the inner peripheral edge of the pit cover 3 and the outer peripheral edge of the table 1 face each other with the gap 6 interposed therebetween. Then, when the table 1 vibrates by the vibration mechanism (not shown), the table 1 becomes a movable part in the claims and the pit cover 3 becomes a non-movable part in the claims.

<Cover structure and cover member>
In the cover structure 11, the sheet-like cover member 12 is disposed along the longitudinal direction of the gap 6 formed between the table 1 (movable portion) and the pit cover 3 (non-movable portion).
As shown in FIGS. 1 (b) and 1 (c), the cover structure 11 is disposed in the longitudinal direction of the gap 6 so that the sheet-like cover member 12 has a substantially U-shape in a cross sectional view. It consists of.
FIG. 2 is a partial perspective view partially showing a cover structure 11 using the cover member 12 according to the present embodiment.

  As shown in FIG. 2, in the cover structure 11, a plurality of first slack portions 13 and a plurality of second slack portions 14 are alternately arranged along the extending direction (longitudinal direction) D of the gap 6 (see FIG. 1). It is connected and arranged to line up.

  The first slack portion 13 forms a main body portion 22 (see FIG. 3) of a cover member forming material 21 (see FIG. 3) described later, and a rectangular sheet portion in plan view has a width direction of the gap 6 (see FIG. 1). In a U-shape.

  The second slack portion 14 is formed of a bag body 15 having a bottom edge 15 a longer than the length of the substantially U-shaped end edge of the first slack portion 13. The bag body 15 is formed by connecting the outer edges 23a (see FIG. 3) of adjacent cover member forming materials 21 (see FIG. 3) to each other over the entire length of the outer edge 23a to form the bottom edge 15a. .

The opening 15 b of the bag body 15 is formed between the adjacent first slack portions 13. Specifically, the opening 15 b appears as a seam between the substantially U-shaped edges of the adjacent first slack portions 13.
The second slack portion 14 consisting of such a bag body 15 is formed so as to further add slack to the cover member 12 from the first slack portion 13 disposed so as to slack in the width direction of the gap 6 (see FIG. 1). Be done.
2 shows that the bag body 15 is folded back in the extending direction (longitudinal direction) D of the gap 6 (see FIG. 1) along the outer peripheral surface of the first slack portion 13. As shown in FIG.

  The cover structure 11 has a pair of support edges 16 and 16 supported respectively on the outer peripheral edge of the table 1 (see FIG. 1) and the inner peripheral edge of the pit cover 3 (see FIG. 1). The supporting edge 16 is formed by connecting the side portions 24 (see FIG. 3) of the cover member forming material 21 (see FIG. 3) aligned in the extending direction (longitudinal direction) D of the gap 6 (see FIG. 1). It is done.

The support edge 16 is formed to extend along the extension direction (longitudinal direction) D of the gap 6.
By the way, the support edges 16, 16 in the present embodiment are held between the upper surface of the edge of the table 1 or the upper surface of the edge of the pit cover 3 and a separately prepared long support plate (not shown). The upper surface of the portion and the support plate are fastened, for example, by bolts or the like. Thus, the cover structure 11 is attached along the extension direction (longitudinal direction) D of the gap 6.

<Method of manufacturing cover member>
Next, the manufacturing method of the cover member 12 which comprises the cover structure 11 is demonstrated.
FIG. 3 is a developed view of the cover member 12 and shows a part of the cover member 12 in the length direction.
In FIG. 3, reference numeral 21 denotes a cover member forming material forming the cover member 12, reference numeral 22 denotes a main body corresponding to the first slack portion 13, and reference numeral 23 denotes a portion corresponding to the second slack portion 14. An edge portion 24 is a side portion corresponding to the support edge 16.

In the method of manufacturing the cover member 12 of the present embodiment, first, a plurality of cover member forming materials 21 (see FIG. 3) to be described next are prepared in accordance with the length of the gap 6 (see FIG. 1).
As shown in FIG. 3, the cover member-forming material 21 has a sheet-like main body 22 forming the first slack portion 13 (see FIG. 2) and an edge forming the second slack portion 14 (see FIG. 2). A portion 23 and a side 24 forming a support edge 16 (see FIG. 2).

The main body portion 22 in the present embodiment is formed of a sheet member having a rectangular planar shape.
The lateral width H1 of the main body 22 is set to be longer than the width W of the gap 6 (see FIGS. 1B and 1C), and desirably, it is set to 1.1 to 10 times the width W. The vertical width H2 of the main body portion 22 can be appropriately set according to the length of the width W of the gap 6 (see FIGS. 1B and 1C).

The edge portion 23 is formed to be connected to the main body portion 22 on both sides in the extending direction (longitudinal direction) D of the gap 6 in the main body portion 22.
The edge 23 in the present embodiment has a length of the outer edge 23a defined on the opposite side of the main body 22 of the edge 23 to a width H1 of the main body 22 defined on the side on which the edge 23 is formed. And a bulged portion from the main body 22 which is longer than the length.
By the way, the edge portion 23 in the present embodiment is a sheet member having a planar shape surrounded by an arc (outer edge 23a) whose side 22a in the direction of the width H1 of the main body 22 is the chord 22a and the chord 22a. It is formed of
The shape of the edge portion 23 is not limited to this as long as the length of the outer edge 23a is longer than the width H1 of the main body portion 22. The shape of the other edge 23 will be described in detail later.

  The side portion 24 is formed of a sheet member having a substantially rectangular planar shape. The side portion 24 is connected to the main body portion 22 on both sides in the horizontal width H1 direction of the main body portion 22, and one side of the side portion 24 connected to the main body portion 22 and the side opposed thereto It has the same length as the width H2. The lengths of the other two sides of the side portion 24 can be set as appropriate.

  Such a cover member forming material 21 can be formed by cutting or punching out a predetermined sheet member in which the main body portion 22, the edge portion 23 and the side portion 24 are integrated.

  Incidentally, as the sheet member (not shown), for example, a flexible resin sheet or the like containing reinforcing fibers can be suitably used.

  As the reinforcing fibers, either staple fibers or filaments can be used, but those containing filaments are desirable. In addition, a sheet member in which long fibers are incorporated in a resin sheet in directions orthogonal to each other is particularly desirable.

  As resin which comprises a resin sheet, a thermoplastic resin, natural rubber, a synthetic rubber etc. are mentioned, for example.

  Subsequent to the preparation step of the cover member forming material 21 as described above, in the manufacturing method in the present embodiment, the connection is made such that the outer edges 23a of the adjacent cover member forming materials 21 are connected to each other over the entire length of the outer edge 23a. The process is performed.

  By this connection process, a bag body 15 (see FIG. 2) having a bottom edge 15a (see FIG. 2) to which outer edges 23a of adjacent edge portions 23 are connected between the adjacent main body portions 22. Is formed. At this time, as described above, the opening 15b of the bag 15 appears as a seam between the substantially U-shaped end edges between the adjacent first slack portions 13.

The connection between the outer edges 23a can be made, for example, by adhesion, heat fusion, suturing or the like.
Then, a first slack portion 13 (see FIG. 2) formed of the main body portion 22 and a second slack portion 13 formed of the bag body 15 (edge portion 23) are formed between the first slack portions 13. Thus, the method of manufacturing the cover member 12 is completed.
By arranging the cover member 12 obtained by such a manufacturing method in the gap 6 (see FIG. 1) as described above, the cover structure 11 of the present embodiment is formed (see FIG. 2).

Next, the operation of the cover structure 11 will be described, and the function and effect of the cover structure 11 will be described.
FIG. 4 is an operation explanatory view of the cover structure 11 in plan view when the table 1 (movable portion) is displaced with respect to the pit cover 3 (non-movable portion) of the vibration test apparatus A of FIG. FIG. 4 is a partially enlarged view schematically showing the vicinity of the second slack portion 14 (see FIG. 2) of the cover structure 11 disposed in the gap 6 (see FIG. 1).

  In FIG. 4, when the table 1 is displaced in the direction of the white arrow with respect to the pit cover 3 due to the excitation, an area B surrounded by a two-dot chain line is a predetermined area of the cover structure 11 rectangular in plan view. The side on the side of the table 1 (not shown) is shifted by "displacement amount C" to be a parallelogram.

  As shown in FIG. 4, when the table 1 side of the cover structure 11 is shifted by the displacement amount C in the direction of the white arrow by the vibration of the table 1, the region B surrounded by the two-dot chain line is in the diagonal FG direction. To stretch.

  Here, the cover structure 11 of the present embodiment differs from the sheet member (see, for example, Patent Document 1) that covers the gap in the conventional shaking table installation, in the extension direction of the cover structure 11 (area B) Of the second slack portion 14 in the diagonal line FG direction).

  By the way, as described above, in the sheet member of the conventional shaking table equipment (for example, refer to patent document 1), the gap between the movable part and the non-moving part of the shaking table equipment linearly extends, If the vibration direction matches the extension direction of the gap, the displacement of the movable portion can not be sufficiently absorbed, and the sheet member may be broken.

  On the other hand, the cover structure 11 of the present embodiment has the second slack portion 14 between the first slack portions 13. That is, as described above, the cover structure 11 of the present embodiment has an extra slack margin E by the second slack portion 14 in the extension direction of the cover structure 11 due to the vibration (see FIG. 4). Therefore, according to the cover structure 11 of the present embodiment, even if it is applied to the gap 6 having a long length with respect to the width, unlike the sheet member of the conventional vibrating table equipment (see, for example, Patent Document 1), The relative displacement between the movable portion (table 1) and the non-movable portion (pit cover 3) can be sufficiently absorbed. Therefore, according to the cover structure 11, the risk of breakage of the cover member 12 constituting the cover structure 11 is reduced.

  Further, according to the cover member 12 of the present embodiment and the method of manufacturing the same, the cover structure 11 is easily formed by connecting a plurality of cover member forming materials 21 punched out so as to form a predetermined sheet member. can do.

  Further, according to the cover member 12 of the present embodiment, when the cover structure 11 is formed by curving the same in a substantially U shape as described above, the bag body 15 forming the second slack portion 14 is It is folded back along the first slack portion 13 to set its initial position. Therefore, according to the cover member 12, the size can be reduced in the vertical direction as compared with the case where the second slack portion 14 is formed so as to simply hang down in the vertical direction between the first slack portions 13.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, It can implement with a various form.
In the cover member forming material 21 forming the cover member 12 of the embodiment described above, the outer edge 23a of the edge portion 23 is a circular arc, but if the length of the outer edge 23a is longer than the horizontal width H1 of the main body 22, It is not limited to
FIG. 5 is a development view of a first modification of the cover member 12 of FIG.

As shown in FIG. 5, the shape of the edge portion 23 of the cover member forming material 21 is an isosceles triangle. Incidentally, the shape of the edge 23 may be another polygon as long as the lengths of the outer edges 23a of the adjacent edges 23 are equal.
In FIG. 5, reference numeral 22 denotes a main body, reference numeral 22 a denotes one side of the main body 22 corresponding to the chord 22 a in FIG. 4, reference numeral 24 denotes a side, and reference numeral D denotes a gap 6. It is the extending direction (longitudinal direction) (see FIG. 1).

  Moreover, in the said embodiment and the 1st modification, although what each cover member formation material 21 isolate | separates separately is assumed, this invention is not limited to this, Each cover member formation material 21 may be connected to each other to be integrated.

6 is a development view of a second modification of the cover member 12 of FIG.
As shown in FIG. 6, the cover member forming material 21 in the present invention may be configured such that the edge portions 23 are connected and integrated between the adjacent main body portions 22.
In FIG. 6, reference numeral 23a denotes the outer edge of the edge 23, reference numeral 22a denotes one side of the main body 22 corresponding to the chord 22a in FIG. 4, reference numeral 24 denotes the side, and reference numeral D denotes , The extending direction (longitudinal direction) of the gap 6 (see FIG. 1).

1 Table (movable part)
2 support 3 pit cover (non-moving part)
DESCRIPTION OF SYMBOLS 4 accommodation space 5 foundation 6 clearance 11 cover structure 12 cover member 13 1st slack part 14 2nd slack part 15 bag body 15a bottom edge 15b opening part 16 support edge 21 cover member formation material 22 main body part 22a chord 23 edge 23a Outer edge 24 side A vibration test equipment

Claims (3)

A cover member for covering a gap formed with a predetermined length between a movable portion and a non-movable portion, the cover member comprising:
A plurality of first slack portions arranged in a plurality along the length direction of the gap so as to slack in the width direction of the gap, and a bag body further imparting slack to the cover member between the first slack portions . 2 with the slack part,
A cover member characterized in that the bag body is folded back along the first slack portion . A first slack portion disposed so as to slack in a width direction of a gap formed with a predetermined length between the movable portion and the non-movable portion, and the cover from the first slack portion disposed so as to slack in the gap A second slack portion formed to further impart slack to the member; and a plurality of the first slack portion and the second slack portion are alternately arranged in the lengthwise direction of the gap A method of manufacturing a cover member,
A sheet-like main body forming the first slack portion; and a sheet-like edge formed on both sides in the length direction of the gap in the main body to form the second slack portion;
A cover member-forming material in which the length of the outer edge defined on the opposite side of the main body in the edge is longer than the width of the main body defined on the side on which the edge of the main body is formed Step of preparing a plurality of
Connecting the outer edges of the adjacent cover member forming materials to each other over the entire length of the outer edge;
A method of manufacturing a cover member, comprising: A cover structure using the cover member according to claim 1;
The cover member is disposed in the longitudinal direction of the gap formed between the movable portion and the non-movable portion with a predetermined length,
The first slack portion is disposed to be slack in the width direction of the gap, and the second slack portion is formed to further impart slack to the cover member from the first slack portion disposed to be slack in the gap. A cover structure characterized in that

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