Fixture

Abstract

To provide a fixture that can make monitoring means less susceptible to vibration.SOLUTION: A fixture 140 attaches monitoring means 190 (camera) to an outrigger 130. Since the monitoring means 190 can be attached to the outrigger 130, which vibrates relatively little, the monitoring means 190 is less likely to vibrate. The fixture 140 can hold the monitoring means 190 at a position higher than an upper surface 131 of the outrigger 130 by means of a base member 160 and a connecting member 170, so that the monitoring range of the monitoring means 190 can be secured and a pile driving area X can be easily viewed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fixture, and more particularly to a fixture that can make it difficult to vibrate monitoring means.

Background Art

[0002] In a pile driver including a truck (vehicle body) and a driver (pile driving device) connected to the truck for driving piles, a technique is known in which a pile driving area is imaged by a camera (monitoring means) and visually recognized by an operator (Patent Document 1). The camera is held by a fixture, and the fixture is attached to the pile driving device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above-described conventional technology, since the fixture is attached to the pile driving device, there is a problem that the monitoring means is likely to vibrate due to vibration from the pile driving device.

[0005] The present invention has been made to solve the above-described problems, and an object thereof is to provide a fixture that can make it difficult to vibrate monitoring means.

Means for Solving the Problems

[0006] In order to achieve this object, the fixture of the present invention is for attaching monitoring means for performing at least one of imaging an image or video of the pile driving area and measuring the pile driving area to a pile driver including a pile driving device that is connected to a vehicle body and performs pile driving in a pile driving area and an outrigger that is connected to the vehicle body and is configured to be grounded to the ground. The fixture includes a pedestal configured to be able to hold the monitoring means, and the pedestal is configured to be attachable to the outrigger.

Effect of the Invention

[0007] According to the fixture described in claim 1, since the fixture includes a pedestal configured to be able to hold the monitoring means and the pedestal is configured to be attachable to the outrigger, in the pile driver, the monitoring means can be attached to the outrigger, which is a portion with relatively less vibration compared to other portions of the pile driver (for example, the vehicle body and the pile driving device). As a result, it is difficult to vibrate the monitoring means held by the fixture.

[0008] According to the fixture described in claim 2, in addition to the effect exhibited by the fixture described in claim 1, since the pedestal is placed on the upper surface of the outrigger and is configured to be rotatable about a first axis parallel to the axis of the outrigger, the monitoring means can be held at a relatively high position of the outrigger and the monitoring means can be directed toward the pile driving area at that relatively high position. Therefore, since the pile driving area located at a position lower than the upper surface of the outrigger can be monitored (imaged and measured) by the monitoring means held at a relatively high position of the outrigger, the pile driving area can be monitored from above. As a result, it is possible to make it easier to visually recognize the pile driving area that is difficult to visually recognize at a low height from the ground.

[0009] According to the fixture described in claim 3, in addition to the effects achieved by the fixture described in claim 2, the pedestal includes an upper surface portion that covers the upper surface of the outrigger, and a side surface portion that extends downward from the lower surface of the upper surface portion and surrounds at least a part of the side surface of the outrigger. Therefore, even if a load acts in a direction in which the fixture tilts with respect to the axis of the outrigger, the side surface portion abuts against the side surface of the outrigger, thereby suppressing the pedestal from coming off the outrigger. Thus, the fixture can be made difficult to come off the outrigger.

[0010] According to the fixture described in claim 4, in addition to the effects achieved by the fixture described in claim 3, the monitoring means is rotatably held around a second axis orthogonal to the plane including the first axis. Therefore, in addition to the rotation around the first axis, the monitoring means can be rotated around the second axis. Thus, the monitoring angle of the monitoring means can be adjusted in relation to the distance between the outrigger and the pile driving area. For example, when the distance between the outrigger and the pile driving area is short, the angle is adjusted so that the monitoring means looks down on the pile driving area from above, thereby enabling the pile driving area to be monitored from above. As a result, it becomes easier to monitor the pile driving area.

[0011] According to the fixture described in claim 5, in addition to the effects achieved by the fixture described in claim 4, the second axis is located outside the outer edge of the pedestal in a top view of the upper surface portion. The pedestal is configured such that in a top view, the visual part, which is the part of the monitoring means that performs monitoring, is located outside the second axis, and the monitoring direction monitored by the visual part is a direction from the center of the pedestal toward the outside. Therefore, when rotating the monitoring means around the second axis, the rotation axis (second axis) of the monitoring means can be positioned outside the pedestal, and the visual part can be positioned outside the second axis. Thus, it becomes difficult for the outrigger and the fixture to be reflected in the visual part. As a result, it becomes easier to monitor the pile driving area.

[0012] According to the fixture described in claim 6, in addition to the effects achieved by the fixture described in claim 5, it is provided with an extension means that can be detachably attached to the pedestal and is configured to be able to hold the monitoring means. The extension means is erected vertically upward from the pedestal or suspended vertically downward from the pedestal. Therefore, the height (vertical position) of the monitoring means with respect to the outrigger can be adjusted by the extension means. When the extension means is erected vertically upward from the pedestal, the height of the monitoring means held by the extension means can be increased to monitor the pile driving area from an overlooking perspective. When the extension means is suspended vertically downward from the pedestal, the height of the monitoring means held by the extension means can be decreased to bring the monitoring means closer to the pile driving area. Thus, the monitoring means can be moved to a position where it is easy to monitor the pile driving area and the surrounding area.

[0013] According to the fixture described in claim 7, in addition to the effects achieved by the fixture described in claim 6, the extension means includes a flat plate-shaped connecting portion and a pair of opposing portions that protrude from the front of the connecting portion and extend from one side to the other side of the connecting portion and are opposed to each other at a predetermined distance in the second axial direction. The pair of opposing portions are configured to be able to hold a bracket inside the pair of opposing portions, and the monitoring means can be held via the bracket. Therefore, when rotating the monitoring means around the second axis via the bracket, it is difficult for the bracket to interfere with the pair of opposing portions. Thus, a wider range within which the monitoring means can be rotated around the second axis can be ensured. As a result, it is easier to monitor the pile driving area.

[0014] According to the fixture described in claim 8, in addition to the effects achieved by the fixture described in claim 7, the pedestal is provided with a protruding portion that protrudes outside the outer edge of the upper surface portion. Therefore, the extension means can be attached to the portion of the pedestal where the protruding portion protrudes. As a result, it is easy to position the monitoring means held by the extension means outside the upper surface portion of the pedestal and the outrigger. Thus, it is difficult for the outrigger and the fixture to be reflected in the visual part of the monitoring means.

[0015] In addition, since the extending means stands vertically upward from the upper surface portion and the protruding portion, the weight of the extending means can be received vertically downward by the upper surface portion and the protruding portion. Therefore, even if the length of the extending means in the standing direction (vertically upward) is increased (the height is increased), the extending means can be stably supported with respect to the upper surface portion and the protruding portion. As a result, it is easy to increase the mounting position of the monitoring means held by the extending means. Thus, it is possible to achieve both easy monitoring of the pile driving area and difficulty in vibrating the monitoring means.

[0016] According to the fixture described in claim 9, in addition to the effect achieved by the fixture described in claim 8, the extending means includes a base member disposed on the pedestal. The base member includes a connecting portion, a pair of opposing portions, and an overhanging portion that extends along the shape of the upper surface of the upper surface portion from the back surface on one side of the connecting portion of the base member and is detachably configured on the upper surface of the upper surface portion. Therefore, the contact area between the extending means (base member) and the upper surface portion can be increased, and even if the length of the extending means in the standing direction is increased (the height is increased), the extending means can be stably supported with respect to the upper surface portion. As a result, it is easy to increase the mounting position of the monitoring means held by the extending means. Thus, it is possible to achieve both easy monitoring of the pile driving area and difficulty in vibrating the monitoring means.

[0017] According to the fixture described in claim 10, in addition to the effects achieved by the fixture described in claim 9, the extending means includes a connecting member disposed on the base member. The connecting member includes a connecting portion, a pair of opposing portions, and a fixing portion that protrudes from one end face of the connecting portion of the connecting member and is detachably configured with its front face facing the back face of the connecting portion of the base member. Therefore, it is easy to position the center of gravity of the extending means on the back side rather than the front side. Thus, even if the monitoring means is held by the extending means, it is easy to position the combined center of gravity of the extending means and the monitoring means at a position where the upper surface portion can receive it in the downward vertical direction. Therefore, even if the length in the standing direction (upward vertical direction) of the extending means is increased (the height is increased), it is easy to stably support the extending means and the monitoring means with respect to the upper surface portion. As a result, it is easy to increase the mounting position of the monitoring means held by the extending means. Therefore, it is possible to achieve both easy monitoring of the pile driving area and difficulty in vibrating the monitoring means.

[0018] According to the fixture described in claim 11, in addition to the effects achieved by the fixture described in claim 10, the connecting portion of the connecting member includes an upper portion that forms a part of the other end face of the connecting member. The connecting portion of the connecting member and one end face of a pair of opposing portions of the connecting member are formed in substantially the same shape as the other end face of the connecting member. The front face of the fixing portion is formed on the same plane as the back face of the upper portion. When a plurality of connecting members are connected above the base member, with the front face of the fixing portion of one connecting member facing the back face of the upper portion of the other connecting member, the fixing portion of one connecting member is detachably attached to the upper portion of the other connecting member. Therefore, the centers of gravity of the plurality of connecting members can be arranged in a straight line in the vertical direction. Thus, it is easy to make the upper surface portion receive the weight of the extending means in the downward vertical direction. Therefore, even if the length in the standing direction (upward vertical direction) of the extending means (connecting member) is increased (the height is increased), it is easy to stably support the extending means and the monitoring means with respect to the upper surface portion. As a result, it is easy to increase the mounting position of the monitoring means held by the extending means. Therefore, it is possible to achieve both easy monitoring of the pile driving area and difficulty in vibrating the monitoring means.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0020] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Referring to FIG. 1, the fixture 140 in the first embodiment will be described. FIG. 1 is a schematic side view of the pile driver 100 with the fixture 140 attached thereto in the first embodiment. In FIG. 1, the directions of the arrows U, D, F, B, L, and R are described as the upward, downward, forward, rearward, leftward, and rightward directions of the pile driver 100, respectively (the same applies to FIGS. 2 to 10). In the present embodiment, the upward direction (arrow U direction) of the pile driver 100 coincides with the vertically upward direction, and the downward direction (arrow D direction) coincides with the vertically downward direction (the same applies to FIGS. 2 to 10).

[0021] Note that in FIG. 1, for the sake of simplicity of explanation, the monitoring direction A (the direction indicated by the arrow A) of the monitoring means 190 attached to the fixture 140 is described as being directed toward the front side (arrow F direction) (the same applies to FIGS. 2 to 10). The fixture 140 is rotated about the first axis O1, which will be described later, in order to visually recognize the pile driving area X, and further, the monitoring means 190 is rotated about the axis O2, which will be described later, so that the monitoring direction A of the monitoring means 190 is directed toward the pile driving area X.

[0022] As shown in FIG. 1, the fixture 140 is for attaching the monitoring means 90 configured as a camera to the pile driver 100. The pile driver 100 includes a vehicle body 110, a pile driving device 120 connected to the vehicle body 110 to perform pile driving work, and outriggers 130 disposed at two locations on the left and right sides of the front side of the vehicle body 110 and at two locations on the left and right sides of the rear side (arrow B direction).

[0023] In the present embodiment, the pile driving device 120 is located in the front side of the vehicle body 110 and is positioned at the center in the left-right direction (arrow L-R direction) of a pair of outriggers 130 disposed on the front side of the vehicle body 110 in a front view (when viewed from the front side toward the rear side). The pile driving area X, which is the area to be pile-driven by the pile driving device 120, is located below the pile driving device 120.

[0024] The vehicle body 110 is provided with an outrigger box (not shown) for storing a beam (not shown) in a square column shape. The beam extends outward in the left - right direction from the outrigger box and projects out at two locations on the left and right sides of the front side and two locations on the left and right sides of the rear side of the vehicle body 110. The outrigger 130 extends from the tip of the beam toward the ground (i.e., in the direction of arrow D) and contacts the ground to support the vehicle body 110 and the pile driving device 120. In FIG. 1, the state before the outrigger 130 contacts the ground is shown.

[0025] In this embodiment, the outrigger 130 includes a cylindrical outer shell extending in the vertical direction (arrow U - D direction) and a main body portion built into the outer shell and extending toward the ground, and the shape of the upper surface 131 of the outer shell is planar. The direction in which the axis O of the outrigger 130 extends coincides with the vertical direction (see FIG. 2). The cylindrical outer shell of the outrigger 130 is made of a magnetic material.

[0026] A monitoring means 190 is attached to the outrigger 130 via a fixture 140 to obtain the situation around the pile driver 100. The images, pictures, and information monitored (imaged and measured) by the monitoring means 190 are projected onto a display (not shown) inside the vehicle body 110, and by checking the display, an operator (driver) can perform the pile driving operation safely. In this embodiment, the fixture 140 is attached to the outrigger 130 on the front side of the vehicle body 110, and the monitoring means 190 attached to the fixture 140 monitors the pile driving area X and the areas around it. Note that the vertical (height) range of the area monitored by the monitoring means 190 (the pile driving area X and the areas around it) may be limited to the vicinity of the ground where the pile is driven, as long as the pile driving area X is included, or may be the range from the vicinity of the ground where the pile is driven to the vicinity of the lower end of the pile driving device 120.

[0027] According to this fixture 140, the monitoring means 190 can be attached to the outrigger 130, which is a part of the pile driver 100 that has relatively less vibration than the vehicle body 110 and the pile driving device 120, via the fixture 140. As a result, it is difficult to vibrate the monitoring means 190. Consequently, displacement, dropping, and damage of the monitoring means 190 due to vibration can be suppressed.

[0028] Next, with reference to FIG. 2, the outline of the fixture 140 will be described. FIG. 2 is a perspective view of the fixture 140 disposed on the outrigger 130.

[0029] As shown in FIG. 2, the fixture 140 includes a pedestal 150 that covers the upper surface 131 of the outrigger 130 and is placed on the upper surface 131, a base member 160 erected on the upper (in the direction of arrow U) side of the pedestal 150, and a connecting member 170 erected on the upper side of the base member 160. The monitoring means 190 is rotatably held around the axis O2 via a bracket 180 on the connecting member 170.

[0030] With these configurations, the monitoring means 190 can rotate around the first axis O1 with respect to the outrigger 130 and around the axis O2, and is held above the upper surface 131 of the outrigger 130.

[0031] The fixture 140 can change the monitoring direction A by the lens 190a of the monitoring means 190 by rotating the fixture 140 around the first axis O1 of the pedestal 150. Further, since the monitoring means 190 is rotatably held around the axis O2 on the connecting member 170, the monitoring direction A of the monitoring means 190 can be further changed by rotating the monitoring means 190 around the axis O2. Since the monitoring means 190 is held on the connecting member 170 of the fixture 140, the pile driving area X can be monitored from a position higher than the upper surface 131 of the outrigger 130.

[0032] Next, referring to FIGS. 2 and 3, the pedestal 150 will be described. FIG. 3(a) is a top view of the pedestal 150 viewed from the direction of arrow IIIa in FIG. 1, FIG. 3(b) is a bottom view of the pedestal 150, and FIG. 3(c) is a cross-sectional view of the pedestal 150 taken along line IIIc-IIIc in FIG. 3(a).

[0033] As shown in FIG. 3(a), the pedestal 150 includes an upper surface portion 151 formed in a disk shape centered on the first axis O1, a side surface portion 155 (see FIGS. 2, 3(b) and 3(c)) extending downward in a direction orthogonal to the upper surface portion 151 from the outer edge of the upper surface portion 151 (i.e., the outer edge 159 of the pedestal 150), and a protruding portion 156 protruding radially outward from a part of the circumferential direction of the outer surface of the side surface portion 155. The side surface portion 155 is a portion of the pedestal 150 formed in an annular shape centered on the first axis O1 of the upper surface portion 151. The first axis O1 coincides with the axis O of the outrigger 130 when the fixture 140 is attached to the outrigger 130 (see FIG. 2). The outer surface of the side surface portion 155 has a shape in which concavities and convexities are repeated in the circumferential direction (not shown).

[0034] The side surface portion 155 is formed over the entire circumference of the outer edge of the upper surface portion 151 in the circumferential direction (see FIG. 3(b)). The upper surface portion 151 is a portion of the pedestal 150 that covers the upper surface 131 of the outrigger 130, and the side surface portion 155 is a portion that surrounds the entire circumference of a portion of the pedestal 150 that includes the upper edge of the side surface 132 of the outrigger 130 (see FIG. 2).

[0035] A pair of fixing holes 151a penetrating from the upper surface 152 to the lower surface 153 are formed in the upper surface portion 151. The pair of fixing holes 151a are arranged at positions equidistantly separated in a direction orthogonal to a straight line passing through the center of the protruding portion 156 and the first axis O1 in a top view and parallel to the upper surface portion 151 (hereinafter referred to as the center line). The fixing holes 151a are holes for removably fixing the base member 160 to the upper surface portion 151 of the pedestal 150 with bolts and nuts.

[0036] The protruding portion 156 includes a connecting portion 158 that protrudes from the outer surface of the side surface portion 155 to one side (frontward in this embodiment), and a pair of opposing portions 157 that protrude from both ends of the front side surface of the connecting portion 158 in a direction orthogonal to the surface and face each other. A hole 157a having a long hole shape that penetrates each of the pair of opposing portions 157 in the thickness direction and extends in the vertical direction is formed in the pair of opposing portions 157 (see FIG. 3(c)). The connecting portion 158 is wider than the interval at which the pair of fixing holes 151a are arranged. In this embodiment, the opposing interval of the pair of opposing portions 157 is made substantially the same as the opposing interval of the pair of opposing portions 167 of the base member 160 and the opposing interval of the pair of opposing portions 177 of the connecting member 170, which will be described later.

[0037] When attaching the monitoring means 190 to the pedestal 150 through the hole 157a, the protruding portion 156 is a portion that rotatably holds the monitoring means 190 via a bracket 180 around an axis O3 that is orthogonal to a plane including the first axis O1 and passing through the centers of the opposing pair of opposing portions 157 (see FIG. 7(a)). The upper surface of the protruding portion 156 is flush with the upper surface 152 of the upper surface portion 151, and the lower surface of the protruding portion 156 is flush with the lower surface of the side surface portion 155 (see FIG. 3(c)).

[0038] As shown in FIG. 3(b), lattice-shaped ridges 153a protruding downward from the lower surface 153 are formed on the upper surface portion 151. Magnets 154 are disposed in each of the portions surrounded by the ridges 153a. Since the outer contour of the outrigger 130 is made of a magnetic material, the pedestal 150 (attachment tool 140) can be attracted and held on the upper surface 131 of the outrigger 130 by the attracting force of the magnets 154.

[0039] As shown in Fig. 3(c), the length by which the side surface portion 155 extends from the upper surface portion 151 is set to be approximately 1 / 4 of the diameter of the upper surface portion 151. In this case, when an external force is applied to the pedestal 150 with respect to the outrigger 130 and the pedestal 150 tends to move in the horizontal direction and in a direction inclined with respect to the axis O of the outrigger 130, the side surface portion 155 comes into contact with the side surface 132 of the outrigger 130, and it becomes difficult for the pedestal 150 (mounting fixture 140) to come off from the outrigger 130. Note that the length of the side surface portion 155 can be in the range of approximately 1 / 2 to 1 / 5 of the diameter of the upper surface portion 151.

[0040] The length by which the protrusion 153a protrudes from the upper surface portion 151 is set to be shorter than the length by which the side surface portion 155 extends from the upper surface portion 151. In the present embodiment, the height of the magnet 154 is made substantially the same as the length by which the protrusion 153a protrudes from the upper surface portion 151. Note that a magnet 154 having a height shorter than the length by which the protrusion 153a protrudes from the upper surface portion 151 can be adopted.

[0041] In the present embodiment, since the length by which the protrusion 153a protrudes from the upper surface portion 151 and the height of the magnet 154 are made substantially the same, when the pedestal 150 (mounting fixture 140) is held on the upper surface 131 of the outrigger 130, both the protrusion 153a and the magnet 154 come into contact with the upper surface 131 of the outrigger 130. Therefore, compared with the case where the height of the magnet 154 is shorter or longer than the length by which the protrusion 153a protrudes from the upper surface portion 151, an area where the upper surface 131 of the outrigger 130 slides with the protrusion 153a and the magnet 154 can be ensured while ensuring the adsorption force of the magnet 154 to the outrigger 130. As a result, the load due to the own weight of the mounting fixture 140 and the weight of the monitoring means 190 held by the mounting fixture 140 can be dispersed to both the protrusion 153a and the magnet 154. Therefore, while making it easy to slide the upper surface 131 of the outrigger 130 with the protrusion 153a and the magnet 154, it is possible to suppress the protrusion 153a and the magnet 154 from being damaged due to the load caused by the own weight of the mounting fixture 140 and the weight of the monitoring means 190.

[0042] Furthermore, since the side surface portion 155 is formed so as to surround the side surface 132 of the outrigger 130, when the pedestal 150 is slid with respect to the outrigger 130, the pedestal 150 can be easily slid in the circumferential direction along the inner peripheral surface of the side surface portion 155. Since the side surface portion 155 is formed in an annular shape centered on the first axis O1 of the upper surface portion 151, the pedestal 150 (mounting tool 140) can be rotated around the first axis O1.

[0043] Note that the ease of rotation of the pedestal 150 (mounting tool 140) with respect to the outrigger 130 can be appropriately adjusted according to the strength, quantity, and height (relative relationship with the protruding length of the protrusion 153a) of the magnetic attraction force of the magnet 154.

[0044] Next, with reference to FIG. 4, the base member 160 will be described. FIG. 4(a) is a front view of the base member 160, and FIG. 4(b) is a side view of the base member 160 viewed from the direction of arrow IVb in FIG. 4(a). In FIG. 4, the front of the base member 160 is shown facing forward and the back of the base member 160 is shown facing backward (the same applies to the connecting member 170 in FIG. 5, the base member 260 in FIG. 9, and the connecting member 270 in FIG. 10).

[0045] As shown in FIG. 4(a), the base member 160 includes a rectangular flat plate-shaped connecting portion 168 extending in the vertical direction, a pair of opposing portions 167 extending forward from both ends in the left-right direction of the connecting portion 168 perpendicular to the connecting portion 168 and facing each other in the left-right direction, and an overhanging portion 169 (see FIG. 4(b)) protruding rearward from the lower end of the connecting portion 168 perpendicular to the connecting portion 168. A fixing hole 168a penetrating in the thickness direction (front-rear direction (arrow F-B direction)) of the connecting portion 168 is formed above the connecting portion 168.

[0046] A plurality of holes 167a are formed in the pair of opposing portions 167 in the vertical direction. The holes 167a are formed in an elongated hole shape extending in the vertical direction. The pair of opposing portions 167 are portions that rotatably hold the monitoring means 190 via the bracket 180 around the axis O4 when the monitoring means 190 is attached to the base member 160 through the holes 167a (see Fig. 7(b)). The axis O4 is an axis orthogonal to the plane including the first axis O1 and passing through the centers of the pair of opposing portions 167 that face each other, and in this embodiment, it is a straight line extending in the left - right direction.

[0047] Since a plurality of holes 167a are formed in the pair of opposing portions 167 in the vertical direction, the height at which the monitoring means 190 is attached can be adjusted according to the position of the attachment hole 167a. Since the holes 167a of the pair of opposing portions 167 are formed as elongated holes, in one hole 167a, the height at which the monitoring means 190 is attached can be further finely adjusted in the direction in which the elongated hole extends (vertical direction).

[0048] As shown in Fig. 4(b), a fixing hole 169a penetrating in the vertical direction is formed in the overhanging portion 169. The fixing hole 169a is a hole through which a bolt - nut is inserted when the base member 160 is fixed to the pedestal 150, and is formed at a position corresponding to the fixing hole 151a on the upper surface portion 151 of the pedestal 150. Since a ridge 153a is formed on the pedestal 150, when the base member 160 is fixed to the pedestal 150 using the fixing hole 151a and the fixing hole 169a, a gap can be formed between the upper surface 131 of the outrigger 130 and the lower surface 153 of the pedestal 150. Therefore, it is difficult for the bolt - nut used for fastening the fixing hole 151a and the fixing hole 169a to interfere with the upper surface 131.

[0049] The base member 160 can ensure a large contact area between the upper surface 152 of the upper surface portion 151 of the pedestal 150 and the base member 160 by the overhanging portion 169. Therefore, the base member 160 attached to the pedestal 150, the connecting member 170 fixed above the base member 160, and the monitoring means 190 can be made difficult to fall with respect to the pedestal 150.

[0050] Since the extending direction of the overhanging portion 169 of the base member 160 is orthogonal to the vertical direction in which the pair of opposing portions 167 and the connecting portion 168 extend, when the base member 160 is connected to the upper surface portion 151 of the pedestal 150, the pair of opposing portions 167 and the connecting portion 168 of the base member 160 are erected vertically upward with respect to the upper surface portion 151 of the pedestal 150 (see FIG. 2). Therefore, the pedestal 150 can receive the load due to the mass of the pair of opposing portions 167 and the connecting portion 168 acting vertically downward. Thus, it is easy to stably support the base member 160 by the pedestal 150.

[0051] The fixture 140 can disassemble the pedestal 150 and the base member 160 by removing the bolt and nut inserted through the fixing holes 151a and 169a. When the portion including the base member 160 erected above the pedestal 150 is unnecessary, the fixture 140 can remove that portion and be used (see FIG. 7(a)).

[0052] Next, referring to FIG. 5, the connecting member 170 will be described. FIG. 5(a) is a front view of the connecting member 170, and FIG. 5(b) is a side view of the connecting member 170 viewed from the direction of arrow Vb in FIG. 5(a).

[0053] As shown in FIG. 5(a), the connecting member 170 includes a rectangular flat plate-shaped connecting portion 178 extending in the vertical direction, a pair of opposing portions 177 extending forward perpendicular to the connecting portion 178 from both ends in the left-right direction of the connecting portion 178 and facing each other in the left-right direction, and a fixing portion 179 protruding downward from the lower end of the connecting portion 178. A fixing hole 178a1 penetrating in the thickness direction of the connecting portion 178 is formed at the upper end of the connecting portion 178. A fixing hole 179a penetrating in the thickness direction of the fixing portion 179 is formed at the lower end of the fixing portion 179. The fixing hole 179a has substantially the same size as the fixing hole 168a of the base member 160 and is the portion through which the bolt and nut are inserted when the connecting member 170 is attached to the base member 160.

[0054] The fixing hole 178a1 and the fixing hole 179a are formed to have substantially the same size and at substantially the same position in the left-right direction. The fixing hole 178a1 and the fixing hole 179a are portions through which bolts and nuts are inserted to fix the upper connecting member 170 to the lower connecting member 170 when further connecting the connecting member 170 upward (see FIG. 7(c)).

[0055] As shown in FIG. 5(b), the connecting portion 178 includes an upper portion 178a in which the fixing hole 178a1 is formed and the thickness is constant, an inclined portion 178b connected below the upper portion 178a and inclined rearward and the thickness is enlarged as it goes downward from the portion connected to the upper portion 178a, and a lower portion 178c connected below the inclined portion 178b and having a constant thickness from the portion connected to the inclined portion 178b.

[0056] A plurality of holes 177a are formed in the pair of opposing portions 177 in the vertical direction. The holes 177a are formed in an elongated hole shape extending in the vertical direction. The pair of opposing portions 177 are portions that rotatably hold the monitoring means 190 via the bracket 180 around the axis O2 when attaching the monitoring means 190 to the connecting member 170 through the holes 177a. The axis O2 is an axis orthogonal to the plane including the first axis O1 and passing through the centers of the opposing pair of opposing portions 177, and in the present embodiment, it is a straight line extending in the left-right direction.

[0057] The lateral width L1a of the base member 160 in the direction in which the pair of opposing portions 167 face each other (see FIG. 4(a)) and the lateral width L2a of the connecting member 170 in the direction in which the pair of opposing portions 177 face each other (see FIG. 5(a)) are made to have substantially the same length. Further, the thickness L1d of the pair of opposing portions 167 and the thickness L2d of the pair of opposing portions 177 are made to have substantially the same thickness. Also, the length L1b from the back surface of the connecting portion 168 of the base member 160 to the front surface of the pair of opposing portions 167 in side view (see FIG. 4(b)) and the length L2c from the front surface of the fixing portion 179 of the connecting member 170 to the front surface of the pair of opposing portions 177 are made to have substantially the same length. The fixing hole 168a of the base member 160 is formed at a position corresponding to the position where the fixing hole 179a of the connecting member 170 is formed.

[0058] A part of these base members 160 and a part of the connecting member 170 have corresponding lengths and widths, and the fixing holes 168a and the fixing holes 179a are formed at corresponding positions. Thus, even if the fixing portion 179 of the connecting member 170 is connected to the base member 160 via the fixing holes 168a and the fixing holes 179a, the directions in which the base member 160 and the connecting member 170 are erected with respect to the pedestal 150 can be made to coincide. Therefore, the weights of the base member 160 and the connecting member 170 can be directed vertically downward and received perpendicularly by the pedestal 150. As a result, the base member 160 and the connecting member 170 can be stably supported by the pedestal 150.

[0059] The thickness by which the inclined portion 178b expands rearward from the upper portion 178a is made substantially the same as the thickness of the fixing portion 179. That is, the length L2b from the back surface of the upper portion 178a to the front surfaces of the pair of opposing portions 177 is made substantially the same as the length L2c, and the fixing holes 178a1 and the fixing holes 179a are formed at corresponding positions. Therefore, when a plurality of connecting members 170 are connected above, the centers of gravity of the plurality of upper and lower connecting members 170 to be connected can be made to be in a straight line and directed downward (see Fig. 7(c)). Therefore, the weights of the plurality of connecting members 170 can be directed vertically downward and received perpendicularly by the pedestal 150 via the base member 160. As a result, the plurality of connecting members 170 can be stably supported by the pedestal 150.

[0060] Here, when the monitoring means 190 is attached to the outrigger 130 via the fixture 140, compared with the case where the monitoring means 190 is attached to the pile driving device 120, since the height of the outrigger 130 is lower than that of the pile driving device 120, the attachment position of the monitoring means 190 tends to be low. On the other hand, in the present embodiment, the pedestal 150 is placed on the upper surface 131 of the outrigger 130, the base member 160 and the connecting member 170 extend above the pedestal 150, and the monitoring means 190 is pivotally supported by the connecting member 170, so that the attachment position of the monitoring means 190 can be raised. Therefore, even when the fixture 140 is attached to the outrigger 130 which is likely to be lower in height than the pile driving device 120, the attachment position (height) of the monitoring means 190 can be ensured. Thus, it becomes easy to monitor the entire pile driving area X and the surrounding area from above by the monitoring means 190.

[0061] The fixture 140 can disassemble the base member 160 and the connecting member 170 by removing the bolt nuts inserted through the fixing holes 168a and 179a. When the connecting member 170 erected above the base member 160 is unnecessary, the fixture 140 can be used with that part removed (see Fig. 7(b)). Since the pedestal 150 and the base member 160 can be disassembled, and the base member 160 and the connecting member 170 can be disassembled, the base member 160 and the connecting member 170 can be changed to those with different sizes, shapes and rigidities according to different types of cameras (monitoring means 190). Also, the pedestal 150 can be changed to those with different sizes, shapes and rigidities according to the shape and size of the outrigger 130.

[0062] Next, with reference to Fig. 6, the positional relationship between the monitoring means 190, the fixture 140 and the outrigger 130 will be described. Fig. 6 is a top view of the fixture 140 viewed from the direction of arrow VI in Fig. 2.

[0063] The monitoring means 190 includes a lens 190a for imaging the area to be monitored (the pile driving area X). The monitoring means 190 is rotatably held on the pair of opposing portions 177 about the axis O2 via a U-shaped bracket 180 that is held inside the pair of opposing portions 177 of the connecting member 170 by the holes 177a (see FIG. 2).

[0064] As shown in FIG. 6, in a top view of the fixture 140, the direction in which the lens 190a faces (monitoring direction A) is the direction facing away from the base member 160 and the connecting member 170 (the direction radially outward from the first axis O1 of the pedestal 150). Therefore, when the pile driving area X is monitored by the monitoring means 190, it is difficult for the base member 160 and the connecting member 170 to be imaged.

[0065] The base member 160 and the connecting member 170 are disposed on the upper surface portion 151 of the pedestal 150 and the upper surface of the protruding portion 156, on the outer edge side of the portion of the upper surface portion 151 where the protruding portion 156 protrudes. Since the monitoring means 190 is held by the connecting member 170, when the pile driving area X is monitored by the monitoring means 190, it is difficult for the pedestal 150 (particularly the upper surface portion 151) and the outrigger 130 to be imaged.

[0066] In a top view of the fixture 140, the axis O2 of the pair of opposing portions 177 is located outside the outer edge 159 of the pedestal 150, and the lens 190a of the monitoring means 190 is located outside the axis O2 with respect to the first axis O1 of the pedestal 150. Therefore, when the pile driving area X is monitored by the monitoring means 190, it is possible to further make it difficult for the pedestal 150 (particularly the upper surface portion 151) and the outrigger 130 to be imaged.

[0067] The bracket 180 is held inside the pair of opposing portions 177, and the width of the monitoring means 190 in the direction of the axis O2 is set to be smaller than the opposing distance between the pair of opposing portions 157, 167, 177. Therefore, since the bracket 180 and the monitoring means 190 can be accommodated in the space between the pair of opposing portions 157, 167, 177, when the monitoring means 190 is rotated around the axis O2, the bracket 180 and the monitoring means 190 interfere with the opposing portion 157 of the protruding portion 156, the opposing portion 167 of the base member 160, and the opposing portion 177 of the connecting member 170. can be prevented. As a result, a wider range for rotating the monitoring means 190 around the axis O2 can be secured.

[0068] Here, with reference to FIG. 7, the combination pattern of the pedestal 150, the base member 160, and the connecting member 170 will be described. FIG. 7(a) is a perspective view of the fixture 140 when the base member 160 and the connecting member 170 are not used, FIG. 7(b) is a perspective view of the fixture 140 when only the base member 160 is used, and FIG. 7(c) is a perspective view of the fixture 140 when a plurality of connecting members 170 are used. Also, in FIG. 7, for ease of viewing, only the reference numerals of the main parts are shown, and the reference numerals of the other parts are omitted (the same applies to FIG. 8). In addition, in FIG. 7, a part of the pedestal 150 is omitted and shown.

[0069] As shown in FIG. 7(a), when the mounting position of the monitoring means 190 can secure a sufficient height near the upper surface 131 of the outrigger 130 (when the pile driving area X can be monitored), the monitoring means 190 is pivotally supported on the protruding portion 156 via the bracket 180 by the hole 157a of the protruding portion 156. Thereby, the monitoring means 190 can be rotated around an axis O3 orthogonal to the plane including the first axis O1. In this case, since the base member 160 and the connecting member 170 can be dispensed with, the number of parts can be reduced.

[0070] As shown in Fig. 7(b), when the mounting position of the monitoring means 190 can ensure a sufficient height at a position connecting the base member 160 rather than the upper surface 131 of the outrigger 130 (when the pile driving area X can be monitored), the monitoring means 190 is pivotally supported on the opposing portion 167 via the bracket 180 by the hole 167a of the opposing portion 167. Thereby, the monitoring means 190 can be rotated around an axis O4 orthogonal to the plane including the first axis O1. In this case, since the connecting member 170 can be dispensed with, the number of parts can be reduced.

[0071] As shown in Fig. 7(c), when it is desired to further increase the mounting position of the monitoring means 190 compared to the case where one connecting member 170 is connected (when it is desired to monitor the pile driving area X from an even higher position), a plurality (two in this embodiment) of connecting members 170 are connected in the standing direction (upward), and the monitoring means 190 is pivotally supported on the opposing portion 177 via the bracket 180 by the hole 177a of the opposing portion 177 of the uppermost connecting member 170. Thereby, the monitoring means 190 can be rotated around an axis O5 orthogonal to the plane including the first axis O1. In this case, since the mounting position of the monitoring means 190 can be made higher than in the case where one connecting member 170 is connected, the range monitored by the monitoring means 190 can be widened. Therefore, it becomes easier for the monitoring means 190 to visually recognize the pile driving area X.

[0072] Next, with reference to Fig. 8(a), the fixture 240 in the second embodiment will be described. In the above first embodiment, the case where the base member 160 and the connecting member 170 are erected upward from the pedestal 150 has been described. In contrast, in the second embodiment, the case where the base member 260 and the connecting member 270 are vertically provided downward from the pedestal 250 will be described.

[0073] Fig. 8(a) is a perspective view of the fixture 240 in the second embodiment. Note that the same parts as those described in the above first embodiment are denoted by the same reference numerals, and the following description thereof is omitted (similarly in Fig. 8(b)).

[0074] As shown in Fig. 8(a), the fixture 240 includes a pedestal 250 that covers the upper surface 131 of the outrigger 130 and is placed on the upper surface 131, a base member 260 that is vertically provided on the lower side of the pedestal 250, and a connecting member 270 that is vertically provided on the lower side of the base member 260. The monitoring means 190 is rotatably held around the axis O6 on the connecting member 270. Note that the side surface portion 255 of the pedestal 250 corresponds to the side surface portion 155 of the fixture 140 in the first embodiment.

[0075] Thereby, the monitoring means 190 is made rotatable around the axis O6. In this case, since the monitoring means 190 can be held below the pedestal 250, it is easier to bring the monitoring means 190 closer to the pile driving region X. In the top view of the fixture 240, the axis O6 of the pair of opposing portions 277 is located outside the outer edge of the upper surface portion 151 of the pedestal 250, and the lens 190a of the monitoring means 190 is located outside the axis O6 with respect to the first axis O1 of the pedestal 250.

[0076] Next, with reference to Fig. 9, the base member 260 will be described. Fig. 9(a) is a front view of the base member 260, and Fig. 9(b) is a cross-sectional view of the base member 260 taken along line IXb-IXb in Fig. 9(a).

[0077] As shown in Fig. 9(a), the base member 260 includes a rectangular flat plate-shaped connecting portion 268 that extends in the vertical direction, a pair of opposing portions 267 that extend forward perpendicular to the connecting portion 268 from both ends in the left-right direction of the connecting portion 268 and face each other in the left-right direction, an overhanging portion 269 (see Fig. 9(b)) that projects rearward perpendicular to the connecting portion 268 from the upper end portion of the connecting portion 268, and an upper portion 261 that projects forward perpendicular to the connecting portion 268 from the upper end portion of the connecting portion 268 and connects the upper end portions of the pair of opposing portions 267 in the opposing direction. A fixing hole 268a that penetrates in the thickness direction (front-rear direction) of the connecting portion 268 is formed on the lower side of the connecting portion 268.

[0078] A plurality of holes 267a are formed in the pair of opposing portions 267 in the vertical direction, and fixing holes 267b are formed below the plurality of holes 267a. The holes 267a are formed in an elongated hole shape extending in the vertical direction. The pair of opposing portions 267 are portions that rotatably hold the monitoring means 190 via the bracket 180 around an axis when attaching the monitoring means 190 to the base member 260 through the holes 267a. The axis of this rotation is an axis orthogonal to the plane including the first axis O1 and passing through the opposing centers of the pair of opposing portions 267. In this embodiment, it is a straight line extending in the left-right direction.

[0079] As shown in FIG. 9(b), a fixing hole 269a penetrating in the vertical direction is formed in the overhanging portion 269. The fixing hole 269a is a hole through which a bolt and nut are inserted when fixing the base member 260 to the pedestal 250, and is formed at a position corresponding to the fixing hole 151a on the upper surface portion 151 of the pedestal 250.

[0080] Next, with reference to FIG. 10, the connecting member 270 will be described. FIG. 10(a) is a front view of the connecting member 270, and FIG. 10(b) is a cross-sectional view of the connecting member 270 taken along the line Xb-Xb in FIG. 10(a).

[0081] As shown in FIG. 10(a), the connecting member 270 includes a rectangular flat plate-shaped connecting portion 278 extending in the vertical direction, and a pair of opposing portions 277 extending forward perpendicular to the connecting portion 278 from both ends in the left-right direction of the connecting portion 278 and opposing each other in the left-right direction. A fixing hole 278a penetrating in the thickness direction of the connecting portion 278 is formed at the lower end portion of the connecting portion 278.

[0082] The pair of opposing portions 277 include enlarged portions 277c whose upper end sides have a wider opposing width than their lower portions. A fixing hole 277c1 penetrating in the thickness direction (arrow L-R direction) is formed in the enlarged portion 277c. The fixing hole 277c1 is substantially the same size as the fixing hole 267b of the base member 260, and is a portion through which a bolt and nut are inserted when attaching the connecting member 270 to the base member 260.

[0083] As shown in FIG. 10(b), a plurality of holes 277a are formed in a pair of opposing portions 277 in the vertical direction, and fixing holes 277b are formed below the plurality of holes 277a. The holes 277a are formed in a long hole shape extending in the vertical direction. The pair of opposing portions 277 are portions that rotatably hold the monitoring means 190 via the bracket 180 around the axis O6 when attaching the monitoring means 190 to the connecting member 270 through the holes 277a. The axis O6 is an axis orthogonal to the plane including the first axis O1 and passing through the opposing centers of the pair of opposing portions 277. In the present embodiment, it is a straight line extending in the left-right direction.

[0084] The fixing hole 277b and the fixing hole 277c1 are formed to have substantially the same size and at substantially the same position in the front-rear direction. The fixing hole 277b and the fixing hole 277c1 are portions through which bolts and nuts are inserted to fix the upper connecting member 270 to the lower connecting member 270 when further connecting the connecting member 270 downward.

[0085] The lateral width L3a (see FIG. 9(a)), which is the width of the base member 260 in the direction in which the pair of opposing portions 267 face each other, and the lateral width L4a (see FIG. 10(a)), which is the width of the pair of enlarged portions 277c in the direction in which they face each other, are made to have substantially the same length. Further, the lateral width L4a is also made to have substantially the same length as the lateral width L4b, which is the width of the connecting member 270 in the direction in which the lower ends of the pair of opposing portions 277 face each other. Furthermore, the thickness L3d of the pair of opposing portions 267 and the thickness L4d of the pair of opposing portions 277 are made to have substantially the same thickness. Also, the length L3b (see FIG. 9(b)) from the back surface of the connecting portion 268 of the base member 260 to the front surface of the pair of opposing portions 267 in a side view and the length L4c from the front surface of the connecting portion 278 of the connecting member 270 to the front surface of the pair of opposing portions 277 are made to have substantially the same length. The fixing hole 267b of the base member 260 is formed at a position corresponding to the position where the fixing hole 277c1 of the connecting member 270 is formed.

[0086] Here, referring to FIG. 8(b), in the fixture 240 of the second embodiment, the case where the connecting member 170 used in the first embodiment is used instead of the connecting member 270 will be described. FIG. 8(b) is a perspective view of the fixture 240.

[0087] As shown in Figure 8(b), the mounting fixture 240 has the connecting member 170 connected vertically below the base member 260. In this case, the connecting member 170 is connected to the base member 260 in an orientation opposite to the up-down direction in Figure 5, i.e., with the upper part 178a facing downward and the fixing part 179 facing upward. The connecting member 170 holds the monitoring means 190 rotatably around axis O7.

[0088] The connecting member 170 is fixed to the base member 260 by inserting bolts and nuts into the fixing holes 179a and 268a of the fixing portion 179 while the front surface (front side surface) of the fixing portion 179 is abutted against the back surface (rear side surface) of the lower end side of the connecting portion 268.

[0089] The width L3a of the base member 260 is approximately the same as the width L2a of the connecting member 170. The thickness L3d of the pair of opposing portions 267 is approximately the same as the thickness L2d of the pair of opposing portions 177. The fixing holes 268a and 179a are formed to have approximately the same size and at corresponding positions. Furthermore, the thickness of the fixing portion 179 is set to be equal to or less than the thickness of the side portion 255 of the base 250.

[0090] As described above in the first embodiment, the connecting member 170 is configured to be connectable to a plurality of members (see FIG. 7(c)), so that further connecting members 170 can be connected to the lower side.

[0091] According to the mounting fixture 240 using the connecting member 170, the connecting member 170 of the mounting fixture 240 can be a common part with the connecting member 170 of the mounting fixture 140 of the first embodiment, so it is not necessary to separately manufacture a part (connecting member 270) for connecting to the lower part of the base member 260. This allows for lower manufacturing costs.

[0092] The present invention has been described above based on an embodiment, but the present invention is not limited to the above embodiment, and it can be easily inferred that various improvements and modifications are possible within the scope of the present invention.

[0093] In each of the above embodiments, the case where the display device is installed inside the vehicle body 110 has been described. However, the display device may be installed at a location away from the pile driver 100 so that a site supervisor or the like can check the pile driving area X at a location away from the pile driver 100.

[0094] In each of the above embodiments, the case where the shape of the upper surface 131 of the outrigger 130 is planar has been described. However, the shape of the upper surface 131 of the outrigger 130 may be a curved surface shape, a bending surface shape, or a frustum surface shape. In these cases, no protrusion 153a is formed on the lower surface 153 of the pedestals 150, 250, and a disc-shaped magnet 154 that covers the lower surface 153 from below is disposed.

[0095] In each of the above embodiments, the case where the shape of the outrigger 130 is a cylinder has been described. However, the shape of the outrigger 130 may be a prism. In this case, the inner surfaces of the side portions 155, 255 of the pedestals 150, 250 of the fixtures 140, 240 are preferably circular shapes that surround those vertices (outer corners) of the outer shape in the top view of the outrigger 130.

[0096] Also, when the shape of the outrigger 130 is a prism, the pedestals 150, 250 may be placed on the outrigger 130 via an annular or bottomed cylindrical intermediate member having an inner shape corresponding to the prism shape of the outrigger 130.

[0097] In each of the above embodiments, the case where the installation surfaces of the pedestals 150, 250 (i.e., the upper surface 131 of the outrigger 130) are planes (horizontal planes) orthogonal to the vertical direction has been described. However, the installation surfaces of the pedestals 150, 250 may be inclined with respect to the horizontal plane. An example of an installation surface inclined with respect to the horizontal plane is the outrigger float of the X-shaped outrigger. In this case, a shim for adjusting the inclination is sandwiched between the pedestals 150, 250 and the base members 160, 260 so that the base member 160 can stand upright above the pedestal 150 in the vertical direction.

[0098] In each of the above-described embodiments, the upper surface portions 151 of the pedestals 150 and 250 have been described as being substantially the same size as the upper surface 131 of the outrigger 130. However, the upper surface portions 151 of the pedestals 150 and 250 may be wider than the upper surface 131 of the outrigger 130. Further, as long as the upper surface portions 151 of the pedestals 150 and 250 cover the outer edge side of the upper surface 131 of the outrigger 130, a hole penetrating the center of the upper surface portion 151 in the vertical direction may be formed.

[0099] In each of the above-described embodiments, the case where the side surface portions 155 and 255 are shaped to surround the entire circumference of the side surface 132 of the outrigger 130 has been described. However, the side surface portions 155 and 255 may be shaped to surround a part of the circumferential direction of the side surface 132 of the outrigger 130.

[0100] In each of the above-described embodiments, the case where the outer surfaces of the side surface portions 155 and 255 are shaped such that the unevenness is repeated has been described. However, a concave portion or a convex portion may be formed on the outer surface of the side surface portions 155 and 255. In this case, a hook spanner (hook wrench) having a convex portion or a concave portion formed in a shape that fits corresponding to the concave portion or the convex portion on the outer surface of the side surface portions 155 and 255 is hooked so that the pedestals 150 and 250 can be rotated around the first axis O1.

[0101] In each of the above-described embodiments, the case where the magnet 154 is disposed on the lower surface 153 of the upper surface portion 151 has been described. However, the magnet 154 may be disposed on the inner surface of the side surface portions 155 and 255. Further, the magnet 154 may be disposed on both the lower surface 153 of the upper surface portion 151 and the inner surface of the side surface portions 155 and 255.

[0102] In each of the above-described embodiments, the case where the mounting means for mounting the pedestals 150 and 250 on the upper surface 131 of the outrigger 130 is the magnet 154 has been described. However, the mounting means may be an adhesive seal or screwing by a screw.

[0103] In each of the above-described embodiments, the case where the pedestals 150 and 250 are manually rotated has been described. However, the pedestals 150 and 250 may be mechanically rotated. In this case, the magnet 154 is omitted, and a rotating means composed of a rotary actuator is disposed between the upper surface portion 151 and the upper surface 131 of the outrigger 130.

[0104] In each of the above-described embodiments, the case where the holes 157a, 167a, 177a, 267a, and 277a are in the shape of elongated holes extending in the vertical direction has been described. However, the holes 157a, 167a, 177a, 267a, and 277a may be round holes.

[0105] In each of the above-described embodiments, the case where a plurality of the holes 167a, 177a, 267a, and 277a are formed in the vertical direction has been described. However, one large elongated hole extending in the vertical direction may be formed.

[0106] In each of the above-described embodiments, the case where the bracket 180 is rotatably held by the bolts and nuts to the opposing portions 157, 167, 177, 267, and 277 through the holes 157a, 167a, 177a, 267a, and 277a has been described. However, the bracket 180 may be rotatably held by the convex portions or concave portions formed on the opposing portions 157, 167, 177, 267, and 277. In this case, the bracket 180 is formed with concave portions or convex portions that engage with the convex portions or concave portions formed on the opposing portions 157, 167, 177, 267, and 277.

[0107] Further, the bracket 180 may be held by the magnets at the connecting portions 158, 168, 178, 268, 278. In this case, the bracket 180 includes a holding portion having a surface held on the front surfaces of the connecting portions 158, 168, 178, 268, 278 on the side opposite to the side where the monitoring means 190 is held. At least one of the connecting portions 158, 168, 178, 268, 278 and the holding portion of the bracket 180 is provided with a magnet, and the other is attracted by the magnet so that the bracket 180 can be held by the connecting portions 158, 168, 178, 268, 278. The bracket 180 includes a shaft portion that enables the second holding portion side to swing with respect to the holding portion between the holding portion and the portion (hereinafter referred to as the second holding portion) where the monitoring means 190 is held.

[0108] In each of the above embodiments, the case where the monitoring means 190 is attached to the pair of opposing portions 157, 167, 177, 267, 277 via the bracket 180 has been described. However, the monitoring means 190 may be directly attached to the pair of opposing portions 157, 167, 177, 267, 277.

[0109] In each of the above embodiments, the case where the monitoring means 190 is configured as a camera has been described. However, in addition to the camera, the monitoring means 190 may include a sensor that processes an image or video captured by the camera to acquire information. The sensor may be a distance sensor that is directed toward the pile driving area X and the surrounding area and measures the distance between the pile driving area X and the lower end of the pile driving device 120, or a temperature (human presence) sensor that notifies when a person has entered the pile driving area X and the surrounding area. Further, the monitoring means 190 may be composed only of a distance sensor or a temperature sensor instead of a camera.

[0110] In each of the above embodiments, the case where the monitoring means 190 is arranged outside (the direction away from the pedestals 150 and 250) the axes O2, O3, O4, O5, O6, and O7 with respect to the first axis O1 in the top view of the fixtures 140 and 240 has been described (see FIGS. 6 to 8). However, the monitoring means 190 may be arranged inside (the direction approaching the pedestals 150 and 250) the axes O2, O3, O4, O5, O6, and O7 with respect to the first axis O1 in the top view of the fixtures 140 and 240.

[0111] In each of the above embodiments, the case where the portion erected from the pedestals 150 and 250 (the base member 160, or the base member 160 and the connecting member 170), or the portion suspended vertically (the base member 260, or the base member 260 and the connecting members 170 and 270) is separated from the pedestals 150 and 250 has been described. However, either the base member 160, or both the base member 160 and the connecting member 170, or the base member 260, or both the base member 260 and the connecting members 170 and 270 may be integrated with the pedestals 150 and 250.

[0112] In each of the above embodiments, the case where the protruding portions 169 and 269 protrude toward the center of the pedestals 150 and 250 has been described. However, the protruding direction of the protruding portions 169 and 269 is not particularly limited. For example, they may protrude in the circumferential direction of the pedestals 150 and 250 or in the direction toward the outer edge 159 of the pedestals 150 and 250. Also, the protruding direction of the protruding portions 169 and 269 may be a combination of these.

[0113] In each of the above embodiments, the case where the protruding portions 169 and 269 protrude only along the shape of the upper surface 152 of the upper surface portion 151 of the pedestals 150 and 250 has been described. However, in addition to the upper surface 152 of the upper surface portion 151 of the pedestals 150 and 250, the protruding portions 169 and 269 may protrude along the shape of the outer surface of the side surface portions 155 and 255.

[0114] In each of the above embodiments, the case where the base member 160 and the connecting member 170 stand vertically upward from the upper surface 152 of the upper surface portion 151 of the pedestal 150, or the case where the base member 260 and the connecting members 170 and 270 hang vertically downward from the upper surface 152 of the upper surface portion 151 of the pedestal 250 has been described. However, the base member 160 (base member 260) and the connecting member 170 (connecting member 270) may stand (hang) obliquely from the upper surface 152 of the upper surface portion 151, or the base member 160 and the connecting member 170 may extend horizontally from the upper surface portion 151 or the side surface portions 155 and 255.

[0115] In each of the above embodiments, the case where the pedestals 150 and 250 include the upper surface portion 151 has been described. However, the pedestals 150 and 250 may be annular having no upper surface portion 151 but including side surface portions 155 and 255 and protruding portions. In this case, since this annular fixture can be attached along the side surface 132 of the outrigger 130, it is not necessary to connect other members (base member 260 and connecting members 170 and 270) to the pedestals 150 and 250 in order to attach the monitoring means 190 at a position lower than the upper surface 131 of the outrigger 130. This annular fixture is preferably screwed, adhered, or adsorbed by a magnet to the side surface 132 of the outrigger 130 to prevent it from slipping off the side surface 132 of the outrigger 130.

[0116] In the first embodiment above, the case where the protruding portion 156 is formed on the pedestal 150 has been described. However, the protruding portion 156 may be omitted from the pedestal 150. In this case, the base member 160 is fixed only to the upper surface portion 151 of the pedestal 150.

[0117] In the second embodiment described above, the connection portions 178, 268, and 278 of the base member 260 and the connection members 170 and 270 have been described as being flat plates, but the connection portions 178, 268, and 278 may be curved plates. In this case, the connection portion 268 is shaped along the side surface portion 255 of the pedestal 250, and the connection portions 178 and 278 project rearward by the thickness of the side surface portion 255 of the pedestal 250 and are shaped along the side surface 132 of the outrigger 130. Since the connection portions 178, 268, and 278 can be brought into contact with the side surface portion 255 and the side surface 132 of the outrigger 130, respectively, it is easy to stably support the base member 260 and the connection members 170 and 270 on the pedestal 250 and the outrigger 130.

[0118] In the second embodiment described above, the case where the pedestal 250 does not include a projecting portion that projects outward from the outer edge of the upper surface portion 151 has been described, but the pedestal 250 may include a projecting portion. In this case, a fixing hole corresponding to the fixing hole 277c1 of the connection member 270 is formed at the lower end of the projecting portion. The projecting portion can be connected to the enlarged portion 277c of the connection member 270 by the fixing hole. As a result, the base member 260 can be made unnecessary.

[0119] In the second embodiment described above, the case where the fixing hole 269a is a round hole has been described, but the fixing hole 269a may be a long hole extending in the front-rear direction. In this case, the back surface of the connection portion 268 of the base member 260 is brought into contact with the side surface portion 255 of the pedestal 250, and the back surfaces of the connection portions 178 and 278 of the connection members 170 and 270 connected to the base member 260 are brought into contact with the side surface 132 of the outrigger 130, respectively, or the attachment position of the base member 260 with respect to the pedestal 250 can be adjusted so that either one is brought into contact.

Description of Reference Numerals

[0120] 100 Hammering Machine 110 Vehicle Body 120 Hammering Device 130 Outrigger 131 Upper Surface 132 Side Surface 140, 240 Fixture 150,250 pedestals 151 upper part 152 top surface 153 bottom surface 155,255 side surfaces 156 protruding part 157,167,177,267,277 opposing parts 158,168,178,268,278 connecting parts 159 outer edge 160,260 base members (extension means) 169,269 protruding parts 170,270 connecting members (extension means) 178a upper part 179 fixing part 180 bracket 190 monitoring means 190a lens (visual part) Arrow A monitoring direction Axis O Axis O1 first axis Axes O2, O3, O4, O5, O6, O7 (second axis) X pile driving area

Claims

1. In a pile driver comprising a vehicle body, a pile driving device connected to the vehicle body and performing pile driving in a pile driving area, and outriggers connected to the vehicle body and configured to be grounded to the ground, a fixture for attaching monitoring means for performing at least one of imaging an image or video of the pile driving area and measuring the pile driving area, comprising a pedestal configured to be able to hold the monitoring means, The pedestal is characterized in that it is configured to be attachable to the outrigger.

2. The fixture according to claim 1, wherein the pedestal is placed on the upper surface of the outrigger and is configured to be rotatable about a first axis parallel to the axis of the outrigger.

3. The fixture according to claim 2, wherein the pedestal includes an upper surface portion covering the upper surface of the outrigger and a side surface portion extending downward from the lower surface of the upper surface portion and surrounding at least a part of the side surface of the outrigger.

4. The fixture according to claim 3, wherein the monitoring means is rotatably held about a second axis orthogonal to the plane including the first axis.

5. The second axis is located outside the outer edge of the pedestal in a top view of the upper surface portion, In the top view, the pedestal is configured such that a visual part, which is a part of the monitoring means for imaging or measuring, is located outside the second axis, and a monitoring direction imaged or measured by the visual part is a direction from the center of the pedestal toward the outside. The fixture according to claim 4.

6. The fixture according to claim 5, further comprising an extension means detachably attached to the pedestal and configured to be able to hold the monitoring means, The extension means is characterized in that it is erected vertically upward from the pedestal or suspended vertically downward from the pedestal.

7. The extension means includes a flat plate-shaped connecting portion and a pair of opposing portions protruding from the front surface of the connecting portion and extending from one side to the other side of the connecting portion while being opposed to each other at a predetermined distance, The fixture according to claim 6, wherein the pair of opposing portions are configured to be able to hold a bracket inside the pair of opposing portions, and the monitoring means is able to be held via the bracket.

8. The pedestal includes a protruding portion protruding outside the outer edge of the upper surface portion. The extension means is the fixture according to claim 7, characterized in that it stands vertically upward in the vertical direction from the upper surface portion and the protruding portion.

9. The extension means includes a base member disposed on the pedestal, The base member includes a connection portion, a pair of opposing portions, and a protruding portion that protrudes along the shape of the upper surface of the upper surface portion from the back surface on one side of the connection portion of the base member and is configured to be detachable from the upper surface of the upper surface portion. The fixture according to claim 8, characterized by the above.

10. The extension means includes a connecting member disposed on the base member, The connecting member includes a connection portion, a pair of opposing portions, and a fixing portion that protrudes from the end surface on one side of the connection portion of the connecting member and is configured to be detachable with its front face facing the back surface of the connection portion of the base member. The fixture according to claim 9, characterized by the above.

11. The connection portion of the connecting member includes an upper portion that forms a part of the end surface on the other side of the connecting member, The connection portion of the connecting member and the end surfaces on one side of the pair of opposing portions of the connecting member are substantially the same shape as the end surface on the other side of the connecting member, The front surface of the fixing portion is formed on the same plane as the back surface of the upper portion, When a plurality of the connecting members are connected above the base member, with the front surface of the fixing portion of one connecting member facing the back surface of the upper portion of the other connecting member, the fixing portion of the one connecting member is detachably attached to the upper portion of the other connecting member. The fixture according to claim 10, characterized by the above.

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