JP2015021242A - Segment holding device of shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment holding device capable of easily performing insertion of a pin into a suspension hole of a hanger.SOLUTION: A segment holding device 1 of a shield machine includes: a fixing plate 6 with one principal surface on which a pin 7 inserted into a suspension hole of a hanger 91 is erected; a movable plate 5 comprising a holding part for holding the hanger 91 with the fixing plate 6 and a bent part bent from an end on the opposite side to a segment 9 in the holding part to the opposite side to the fixing plate 6; a contact member 8 in contact with an opposite side surface of the fixing plate 6 in the movable plate 5; and a moving mechanism 4 for opening and closing the movable plate 5 by making the contact member 8 move along the thickness direction of the segment 9. A first tooth row consisting teeth aligned in the thickness direction of the segment 9 is formed on the principal surface on which the pin 7 of the fixing plate 6 is erected, and a second tooth row engaging with the first tooth row is formed on the surface on the fixing plate 6 side of the movable plate 5 so as to be extended over the holding part and the bent part.

Description

  The present invention relates to a segment gripping device for a shield machine.

  2. Description of the Related Art Conventionally, there is known a segment gripping device that grips a segment via a hanging object attached to the segment, which is installed in an elector of a shield machine. For example, Patent Document 1 discloses a segment gripping device 100 for a shield machine as shown in FIG. In this segment gripping device 100, the hydraulic jack 130 is used to insert the pin 122 into the suspension hole 152 of the suspended object 151, which has been performed manually by a conventional worker. In the example shown in FIG. 7, the hanging member 151 is provided integrally with the segment 150.

  Specifically, the segment gripping device 100 extends through the pair of support plates 110 for sandwiching the hanging object 151, the arms 121 arranged along the one support plate 110, and the pair of support plates 110, And a slide shaft 120 to which an arm 121 is attached. Each support plate 110 has a substantially triangular shape that is pointed downward from two guide shafts 140 that are spaced apart from each other in a direction perpendicular to the paper surface, and a through hole 111 is provided in the lower part thereof. The arm 121 has a rod shape extending in the vertical direction, and a pin 122 inserted through the through hole 111 and the suspension hole 152 is fixed to the lower portion of the arm 121. A hydraulic jack 130 that is coaxially connected to the slide shaft 120 is disposed on the opposite side of the arm 121 with the pair of support plates 110 interposed therebetween.

JP-A-4-360997

  In the segment gripping device 100 disclosed in Patent Document 1, the pin 122 cannot be moved unless the erector is operated so that the through hole 111 of the support plate 110 and the suspension hole 152 of the hanging object 151 coincide with each other. However, it is very difficult to match such holes because the position of the suspension hole 152 needs to be confirmed through the through hole 111 on the hydraulic jack 130 side.

  Then, an object of this invention is to provide the segment holding | grip apparatus which can perform insertion of the pin to the hanging hole of a hanging object easily.

  In order to solve the above-mentioned problems, a segment gripping device for a shield machine according to the present invention is a segment gripping device for a shield machine that grips the segment via a hanging object attached to the segment, and is one main surface. A fixed plate with a pin inserted into a suspension hole of the suspension member, a sandwiching portion for sandwiching the suspension member inserted through the pin together with the fixation plate, and the segment in the sandwiching portion, A movable plate including a bent portion that bends from the opposite end to the opposite side of the fixed plate; a contact member that contacts the surface of the movable plate opposite to the fixed plate; and A moving mechanism for moving the abutting member from the clamping part toward the bent part, whereby the clamping part is separated from the fixed plate. A moving mechanism that closes the movable plate so that the clamping portion approaches the fixed plate by opening the movable plate and moving the contact member from the bent portion toward the clamping portion, A first tooth row made of teeth arranged in the thickness direction of the segment is formed on the main surface of the fixed plate, and the sandwiching portion and the bent portion are formed on the surface of the movable plate on the fixed plate side. A second tooth row meshing with the first tooth row is formed so as to straddle the line.

  According to the above configuration, since the movable plate is configured to be openable and closable with respect to the fixed plate, when the movable plate is opened, the pin is inserted into the hanging hole of the hanging object while visually recognizing the pin provided on the fixed plate. Can be inserted easily. Furthermore, the second tooth row is formed on the movable plate so as to straddle the sandwiching portion and the bent portion, and this second tooth row meshes with the first tooth row formed on the fixed plate, so that the movable plate opens and closes. Even so, the movable plate does not fall. That is, the movable plate can be swingably supported with a simple configuration in which the movable plate is sandwiched between the fixed plate and the contact member.

  The moving mechanism includes an actuator, and the actuator includes a pair of first holding jacks that restrict the swing of the segment in the axial direction of the pin and a pair of second holding jacks that restrict the swing of the segment around the pin. One of them may be used. According to this configuration, it is not necessary to provide a new actuator for driving the movable plate, and the movable plate can be opened and closed using the holding jacks that have been conventionally provided in the segment gripping device. Moreover, since the suspended object is clamped by the fixed plate and the movable plate at the same time that the segment is prevented from shaking by the holding jack, the segment gripping process can be simplified.

  The holding jack, which is the actuator, may abut on the segment when the abutting member moves on the clamping part by a predetermined distance from the boundary between the clamping part and the bent part. According to this configuration, the movable plate can be kept closed even if the posture of the segment is finely adjusted by the holding jack.

  The abutting member may be a roller that can roll on the clamping portion and the bent portion. According to this configuration, wear of the contact member and the movable plate can be prevented.

  An inclined surface that is inclined toward the bent portion so as to approach the fixed plate may be provided in a portion adjacent to the bent portion on the surface opposite to the fixed plate in the clamping portion. According to this configuration, the movable plate can be pressed against the fixed plate after the movable plate is closed by the movement of the contact member.

  The fixed plate may be provided with a pair of guide walls that oppose each other with the sandwiching portion and the bent portion interposed therebetween and guide the movable plate. According to this configuration, the movable plate can be restrained in a direction orthogonal to the swinging direction with a simple structure.

  According to the present invention, the pin can be easily inserted into the hanging hole of the hanging object.

It is a fragmentary sectional view of the shield machine provided with the segment gripping device concerning one embodiment of the present invention. It is the figure which looked at the shield machine shown in FIG. 1 from back. It is sectional drawing of the segment holding | gripping apparatus along the III-III line of FIG. It is a disassembled perspective view of a fixed plate, a movable plate, and a contact member. (A) And (b) is sectional drawing of a stationary plate and a movable plate, (a) shows the state which the movable plate opened, (b) shows the state which the movable plate closed. It is a disassembled perspective view of the fixed plate and movable plate of a modification. It is sectional drawing of the conventional segment holding | gripping apparatus.

  1 and 2 show a shield machine equipped with a segment gripping device 1 according to an embodiment of the present invention. The shield machine includes an erector 12 arranged in the shield shell 11, and the erector 12 is equipped with the segment gripping device 1.

  In this embodiment, the shield shell 11 has a circular cross-sectional shape, and the segment 9 is an arc-shaped panel that is long in the circumferential direction with respect to the width. That is, the thickness direction of the segment 9 coincides with the radial direction centered on the center line of the shield shell 11. However, the width of the segment 9 may be longer than the length in the circumferential direction. Further, the cross-sectional shape of the shield shell 11 is not limited to a circular shape, and may be an elliptical shape, a rectangular shape with rounded corners or a substantially triangular shape, and the shape of the segment 9 may be in accordance with the tunnel shape. As appropriate. Hereinafter, the radial direction and the circumferential direction around the center line of the shield shell 11 are simply referred to as the radial direction and the circumferential direction, respectively.

  The erector 12 conveys the segment 9 from the delivery position shown by a two-dot chain line in FIG. 1 to a desired assembly position by moving the segment gripping device 1 in the radial direction or turning in the circumferential direction.

  The segment gripping device 1 is attached to two sliding rods 13 extending rearward from the suspension beam 14 of the erector 12. The segment gripping device 1 includes two sliding portions 22 inserted through the sliding rod 13 and a main body portion 21 straddling these sliding portions 22. The segment gripping device 1 includes a sliding jack 23 attached to each sliding portion 22. The sliding jack 23 can be operated by an operator with an unillustrated operation box, and by sliding the sliding jack 23, the segment gripping device 1 can be slid in the front-rear direction (the axial direction of the shield shell 11). it can. Note that the holding jacks 31 to 34 described later can also be operated by the operator using the operation box.

  As shown in FIG. 4, a hanging object 91 is attached to the inner side surface of the segment 9. For example, the hanger 91 has a screw shaft that is screwed into a screw hole provided in the segment 9. However, similarly to the segment 150 shown in FIG. 7, the hanger 91 may be provided integrally with the segment 9. The segment gripping device 1 grips the segment 9 via the hanging object 91.

  The hanging piece 91 is a plate-like member, and the hanging piece 91 is provided with a hanging hole 92 that penetrates the hanging piece 91 in the thickness direction. In the present embodiment, the thickness direction of the hanging object 91 faces the width direction of the segment 9, but the thickness direction of the hanging object 91 may face the longitudinal direction of the segment 9.

  Next, the configuration of the segment gripping device 1 will be described in detail with reference to FIGS. 3 to 5B. In the following, for convenience of explanation, the center of the segment gripping device 1 at that time is considered based on the case where the segment gripping device 1 grips the segment 9 at the delivery position (when the segment 9 is lifted). The radial direction passing through is referred to as the vertical direction (the radially inner side is upward and the radial outer side is downward), and the direction perpendicular to the vertical direction and the front-rear direction is referred to as the left-right direction.

  The main body 21 of the segment gripping device 1 has a box shape, for example. A pair of front and rear first holding jacks 31 and 32 and a pair of left and right second holding jacks 33 and 34 (see FIG. 2) are attached to the main body 21. Further, the segment gripping device 1 includes a fixed plate 6 fixed to the main body portion 21 and a movable plate 5 facing the fixed plate 6 behind the fixed plate 6.

  The pair of front and rear first holding jacks 31 and 32 are for restricting the swing of the segment 9 in the axial direction of the pin 7 described later. The pair of second holding jacks 33 and 34 are for restricting the swing of the segment 9 around the pin 7. Each jack includes a jack main body 35 fixed to the main body portion 21, a jack rod 36 that can be expanded and contracted in the vertical direction from the jack main body 35, and a buffer material 37 provided at the tip of the jack rod 36.

  The fixing plate 6 is flat in the front-rear direction, and has a first main surface 6a facing rearward and a second main surface 6b facing frontward. On the first main surface 6a, a pin 7 to be inserted into the hanging hole 92 of the hanging object 91 is erected vertically. That is, the pin 7 extends in the front-rear direction.

  The movable plate 5 has a shape in which the upper part is warped rearward, and is configured to be able to swing in the front-rear direction with the upper part as a fulcrum. Specifically, the movable plate 5 includes a flat holding portion 51 for holding the suspended object 91 inserted through the pin 7 together with the fixed plate 6, and an upper end portion of the holding portion 51 (an end portion opposite to the segment 9). A bent portion 52 that bends to the opposite side of the fixing plate 6 from the bent portion 52. That is, the movable plate 5 has a first surface 5 a on the fixed plate 6 side and a second surface 5 b on the opposite side to the fixed plate 6, the upper portion of which is curved.

  In the present embodiment, the holding part 51 is provided with a through hole 53 inserted through the pin 7. However, the through hole 53 is not necessarily provided in the clamping part 51, and the lower part of the clamping part 51 may have a bifurcated shape that opens downward. In the present embodiment, the bent portion 52 is bent approximately 90 degrees. However, the angle at which the bent portion 52 bends can be selected as appropriate. Furthermore, in the present embodiment, the bent portion 52 is smoothly bent at a constant curvature, but the bent portion 52 may be a straight shape that is bent at an acute angle from the sandwiching portion 51.

  The gap between the first main surface 6a of the fixed plate 6 and the first surface 5a of the movable plate 5 is set to be relatively small. For this reason, step portions 6 c and 5 c for avoiding interference with the hanger 91 are respectively provided on the lower portion of the first main surface 6 a of the fixed plate 6 and the lower portion of the first surface 5 a of the movable plate 5. . However, the step portions 6c and 5c are not necessarily provided.

  On the first main surface 6a of the fixed plate 6, a first tooth row 65 including teeth 66 arranged in the vertical direction is formed above the stepped portion 6c. Each tooth 66 extends in the left-right direction with a constant cross-sectional shape over substantially the entire width of the first main surface 6a. The cross-sectional shape of each tooth 66 is not particularly limited as long as it has a shape pointed toward the rear, and may be, for example, a triangular shape with rounded vertices, a trapezoidal shape, or a semicircular shape.

  A second tooth row 55 that meshes with the first tooth row 65 is formed on the first surface 5a of the movable plate 5 so as to straddle the sandwiching portion 51 and the bent portion 52 above the step portion 5c. The second tooth row 55 includes teeth 56 arranged in the vertical direction, and each tooth 56 has the same shape as the tooth 66 of the first tooth row 65 in the present embodiment, but has a shape different from that of the tooth 66. You may do it.

  An abutting member 8 is arranged behind the movable plate 5 so as to abut on the second surface 5b of the movable plate 5. The movable plate 5 is opened and closed by a moving mechanism 4 that moves the contact member 8 along the vertical direction. That is, as shown in FIG. 5A, when the contact member 8 is moved from the sandwiching portion 51 toward the bent portion 52, the movable plate 5 opens so that the sandwiching portion 51 is separated from the fixed plate 6. On the other hand, as shown in FIG. 5B, when the contact member 8 is moved from the bent portion 52 toward the sandwiching portion 51, the movable plate 5 is closed so that the sandwiching portion 51 approaches the fixed plate 6.

  The teeth 56 located on the clamping part 51 in the second tooth row 55 described above engage with the teeth 66 of the first tooth row 65 when the movable plate 5 is closed, thereby preventing the movable plate 5 from falling. Is done. On the other hand, the teeth 56 located on the bent portion 52 in the second tooth row 55 engage with the teeth 66 of the first tooth row 65 when the movable plate 5 is opened, thereby preventing the movable plate 5 from falling. Is done. That is, the movable plate 5 can be swingably supported with a simple configuration in which the movable plate 5 is sandwiched between the fixed plate 6 and the contact member 8, and there is no need to provide a rotating shaft and a bearing.

  In this embodiment, the abutting member 8 is a roller that can roll on the clamping portion 51 and the bent portion 52. However, the contact member 8 may be a simple round bar that cannot rotate.

  Furthermore, in this embodiment, a pair of guide walls 61 that guide the movable plate 5 are provided so as to face the fixed plate 6 with the sandwiching portion 51 and the bent portion 52 interposed therebetween.

  The moving mechanism 4 that moves the contact member 8 described above includes a rear first holding jack 32 as an actuator. Further, the moving mechanism 4 includes an intermediate rod 42 disposed between the first holding jack 32 and the movable plate 5, and a support member 44 that is fixed to the intermediate rod 42 and supports the contact member 8. The intermediate rod 42 extends in the vertical direction, and is slidably held by a guide cylinder 41 fixed to the jack body 35 of the first holding jack 32. The intermediate rod 42 is connected to the jack rod 36 of the first holding jack 32 by the arm 43 and moves up and down in conjunction with the jack rod 36. That is, the vertical movement distance of the contact member 8 is equal to the stroke of the first holding jack 32. Therefore, when the jack rod 36 of the first holding jack 32 is at the most retracted standby position, the contact member 8 is positioned at the highest position, and the movable plate 5 is opened most greatly. When the jack rod 36 advances from the standby position, the movable plate 5 is gradually closed, and when the contact member 8 reaches the boundary B between the sandwiching portion 51 and the bent portion 52, the closing operation of the movable plate 5 is completed. The opening operation of the movable plate 5 is opposite to this.

  The first holding jacks 31, 32 and the second holding jacks 33, 34 may be re-operated a little to finely adjust the posture of the segment 9 after being operated until it comes into contact with the segment 9 once. In order to prevent the movable plate 5 from being opened by this re-operation, the rear first holding jack 32 is moved when the contact member 8 moves on the clamping part 51 by a predetermined distance D from the boundary B between the clamping part 51 and the bent part 52. Abut the segment 9. According to this configuration, even when the posture of the segment 9 is finely adjusted by the first holding jack 32, the movable plate 5 can be maintained in a closed state.

  Further, in the present embodiment, the bent portion 51 of the movable plate 5 is bent at a portion adjacent to the bent portion 52 on the surface opposite to the fixed plate 6 (that is, a certain range below the boundary B on the second surface 5b). An inclined surface 5d that is inclined toward the fixing plate 6 toward the portion 52 is provided. According to this configuration, the movable plate 5 can be pressed against the fixed plate 6 after the movable plate 5 is closed by the movement of the contact member 8.

  The cross-sectional shape of the inclined surface 5d may be a straight line or a curved line. In addition, it is desirable that the vertical height of the inclined surface 5d is sufficiently shorter than the predetermined distance D described above. This is to prevent the movable plate 5 from moving in the front-rear direction when finely adjusting the posture of the segment 9.

  As described above, in the segment gripping device 1 of the present embodiment, since the movable plate 5 is configured to be openable and closable with respect to the fixed plate 6, the pins provided on the fixed plate 6 when the movable plate 5 is opened. The pin 7 can be easily inserted into the hanging hole 92 of the hanger 91 while visually recognizing 7.

  In this embodiment, since the contact member 8 is a roller, wear of the contact member 8 and the movable plate 5 can be prevented. Furthermore, in this embodiment, since the fixed wall 6 is provided with the guide wall 61, the movable plate 5 can be restrained in a direction orthogonal to the swinging direction with a simple structure.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, the actuator of the moving mechanism 4 does not necessarily need to be the first holding jack 32 on the rear side, and may be the first holding jack 31 on the front side or one of the second holding jacks 33 and 34. Also good. The orientation of the fixed plate 6 and the arrangement position of the movable plate 5 can be appropriately changed according to the position of the actuator.

  Further, the moving mechanism 4 may include a dedicated actuator that moves the contact member 8 separately from the holding jacks 31 to 34. However, if the actuator of the moving mechanism 4 is one of the holding jacks 31 to 34 as in the above-described embodiment, it is not necessary to provide a new actuator for driving the movable plate 5, and the segment gripping has been conventionally performed. The movable plate 5 can be opened and closed by using the holding jack equipped in the apparatus rationally. In addition, since the suspended object 91 is held between the fixed plate 6 and the movable plate 5 at the same time as the holding of the segments 9 by the holding jacks 31 to 34, the holding process of the segment 9 can be simplified.

  The guide plate 61 is not necessarily provided on the fixed plate 6. For example, as shown in FIG. 6, a groove 67 extending in the vertical direction is provided on the first main surface 6 a of the fixed plate 6, and a convex portion 57 that fits the groove 67 is provided on the first surface 5 a of the movable plate 5. Good. As shown in FIG. 6, the first tooth row 65 and the second tooth row 55 (drawing is omitted in FIG. 6) may be provided in two rows with a short width.

  Or although illustration is abbreviate | omitted, the groove | channel extended in the up-down direction may be provided in the 2nd surface 5b of the movable plate 5, and the ring-shaped protrusion may be provided in the roller which is the contact member 8. FIG.

  The segment gripping device of the present invention is useful for variously shaped segments.

DESCRIPTION OF SYMBOLS 1 Segment gripping device 11 Shield shell 31-34 Holding jack 4 Moving mechanism 5 Movable plate 5a, 5b Surface 5d Inclined surface 51 Holding part 52 Bending part 55 2nd tooth row 56 Tooth 6 Fixed plate 6a, 6b Main surface 61 Guide wall 65 First tooth row 66 teeth 7 pins 8 abutting members 9 segments 91 hanging objects 92 hanging holes

Claims (6)

A segment gripping device of a shield machine that grips the segment via a hanging object attached to the segment,
A fixing plate in which a pin to be inserted into the suspension hole of the suspension object is erected on one main surface;
A movable plate that includes a holding portion for holding the hanging object inserted through the pin together with the fixed plate, and a bent portion that bends from the end of the holding portion opposite to the segment to the opposite side of the fixed plate. When,
A contact member that contacts the surface of the movable plate opposite to the fixed plate;
A moving mechanism for moving the abutting member along the thickness direction of the segment, wherein the abutting member moves away from the fixed plate by moving the abutting member from the clamping portion toward the bent portion; A moving mechanism that closes the movable plate so that the sandwiching portion approaches the fixed plate by opening the movable plate and moving the contact member from the bent portion toward the sandwiching portion,
A first tooth row composed of teeth arranged in the thickness direction of the segment is formed on the main surface of the fixing plate,
A second tooth row that meshes with the first tooth row is formed on the surface of the movable plate on the fixed plate side so as to straddle the clamping portion and the bent portion.
Segment gripping device for shield machine.   The moving mechanism includes an actuator, and the actuator includes a pair of first holding jacks that restrict the swing of the segment in the axial direction of the pin and a pair of second holding jacks that restrict the swing of the segment around the pin. The segment gripping device for a shield machine according to claim 1, which is one of them.   3. The shield machine according to claim 2, wherein the holding jack that is the actuator contacts the segment when the contact member moves on the clamping part by a predetermined distance from a boundary between the clamping part and the bent part. Segment gripping device.   The segment gripping device for a shield machine according to any one of claims 1 to 3, wherein the contact member is a roller that can roll on the clamping part and the bent part.   The inclined surface which inclines so that it may approach the said fixing plate toward the said bending part is provided in the part adjacent to the said bending part of the surface on the opposite side to the said fixing plate in the said clamping part. The segment gripping device for a shield machine according to any one of claims 4 to 5. The shield plate according to any one of claims 1 to 5, wherein the fixed plate is provided with a pair of guide walls that are opposed to each other with the sandwiching portion and the bent portion interposed therebetween and guide the movable plate. Machine segment gripping device.

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