JP2004233214A - Tripod placement auxiliary implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tripod placement auxiliary implement capable of easily placing a tripod. <P>SOLUTION: The tripod placement auxiliary implement 11 is provided with both a substrate 15 and three extending and contracting bodies 25 capable of extending and contracting between an unfolded state and a folded state by rotation. The extending and contracting bodies 25 each comprise both a first tubular member 26 and a second tubular member 29 passed through the first tubular member 26 in such a way that the length of a protrusion may be adjusted. Locking bodies 41 for locking lower ends of legs of the tripod for survey are rotatably provided for the tip side of the second tubular members 29 of the extending and contracting bodies 25. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tripod installation aid that can easily perform a tripod installation operation.
[0002]
[Prior art]
Conventionally, for example, a chain-type tripod installation aid 1 shown in FIG. 7 is known (for example, see Non-Patent Document 1).
[0003]
The chain-type tripod installation aid 1 shown in FIG. 7 locks the lower ends of the legs 5 of the tripod 4 at the respective ends of three chains 3 detachably attached to the ring-shaped base 2. The body 6 is worn.
[0004]
[Non-patent document 1]
"Mizox Product Information Guide Vol. 19", Myzox Co., Ltd., December 2001, p. 23
[0005]
[Problems to be solved by the invention]
However, in the above-mentioned conventional chain-type tripod installation aid 1, when adjusting the distance between the base 2 and the locking body 6, for example, the chain 3 is detached and the chain piece between the base 2 and the locking body 6 is removed. It is necessary to reset the number of 3a, so that the tripod installation work tends to be complicated.
[0006]
The present invention has been made in view of such a point, and an object of the present invention is to provide a tripod installation aid that can easily perform a tripod installation operation.
[0007]
[Means for Solving the Problems]
The tripod installation aid according to claim 1 is provided on a base, three expandable and contractible members which are rotatably provided on the base and which are deployed by rotation, and are provided on the distal end side of each of the expandable and contractible members. And a locking member for locking the lower end of the tripod leg.
[0008]
Since the distance between the base and the locking body can be adjusted by the expansion and contraction of the elastic body, it is possible to easily perform the operation of installing the tripod.
[0009]
According to a second aspect of the present invention, there is provided the tripod installation aid according to the first aspect, wherein the locking member is rotatably provided at a distal end side of the telescopic body so that the base can be used away from the installation surface. Is what it is.
[0010]
Since the base can be used away from the installation surface by the rotation of the locking body, it is possible to appropriately cope with unevenness and the like on the installation surface.
[0011]
According to a third aspect of the present invention, the telescopic body is inserted into at least the first tubular member and the first tubular member so that the protrusion length can be adjusted. It has a second tubular member.
[0012]
By adjusting the length of the second tubular member protruding from the first tubular member, the elastic body can be easily extended and contracted.
[0013]
The tripod setting aid according to claim 4 is the tripod setting aid according to claim 3, wherein the outer surface of the second tubular member of the telescopic member has a projecting length of the second tubular member from the first tubular member. It has a scale as shown.
[0014]
At a glance of the scale, the protruding length of the second tubular member from the first tubular member can be determined.
[0015]
According to a fifth aspect of the present invention, there is provided a tripod installation aid according to any one of the first to fourth aspects, wherein the base is provided with a magnet that is attracted to the installation surface.
[0016]
Then, it is possible to appropriately prevent the displacement of the base by adsorbing the magnet on the installation surface.
[0017]
According to a sixth aspect of the present invention, there is provided a tripod installation aid according to any one of the first to fifth aspects, further comprising a fixing bolt capable of fixing the base by screwing to an anchor nut.
[0018]
Then, the base can be fixed by screwing the fixing bolt to the anchor nut, so that the tripod can be more easily installed.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a configuration of an embodiment of a tripod installation aid of the present invention will be described with reference to the drawings.
[0020]
In FIGS. 1 to 3, reference numeral 11 denotes a tripod installation aid, which is mounted on a mounting surface S of a surveying tripod (precision tripod) 12, which is a tripod for attaching a surveying instrument (not shown). It assists installation.
[0021]
The tripod installation aid 11 includes a ring-shaped, for example, substantially ring-shaped base member 15 arranged corresponding to the survey reference position S1 on the installation surface S.
[0022]
The base 15 has an annular portion 16, and three attached portions 17 are integrally protruded from an outer peripheral surface of the annular portion 16. Each attached portion 17 is constituted by a pair of protruding plates 18 which are separated from each other. A support shaft 19 composed of a bolt is mounted on the pair of projecting plates 18, and the supporting shaft 19 is fixed to the projecting plate 18 by a nut 20 and a washer 21.
[0023]
In addition, the tripod installation aid 11 includes three tubular elastic members 25 that can expand and contract in the axial direction. The elastic body 25 is rotatably provided on the mounting portion 17 of the base 15 via a support shaft 19.
[0024]
The telescopic body 25 extends from the base 15 in three directions at 120-degree intervals by pivoting in one direction (for example, the pivot angle is 90 degrees) about the support shaft 19 on the base end side. (See FIG. 2). In addition, the elastic body 25 is rotated in the other direction (for example, the rotation angle is 90 degrees) about the support shaft 19 on the base end side, so that the elastic body 25 moves from the base body 15 in one direction (for example, downward). It becomes a folded state extending in parallel (see FIG. 1).
[0025]
Here, the elastic body 25 has an elongated tubular first tubular member (upper tube) 26. One end of the first tubular member 26 is rotatably attached to the attached portion 17 of the base 15 via a support shaft 19. One end surface of the opening of the first tubular member 26 is closed by a cap 27. A retaining member 28 for retaining is fitted on the inner surface of the other end of the first tubular member 26.
[0026]
In addition, the elastic body 25 has a second tubular member (lower tube) 29 that has an elongated cylindrical shape with a smaller diameter than the first tubular member 26. The second tubular member 29 is inserted into the first tubular member 26 so as to adjust the projecting length with respect to the first tubular member 26. On the outer surface of one end of the second tubular member 29, a retaining contact member 31 composed of two divided pieces 30 is fitted. Since the retaining member 31 comes into contact with the receiving member 28, the entire second tubular member 29 does not fall out of the first tubular member 26. On the outer surface of the second tubular member 29, a plurality of graduations 32 along the circumferential direction indicating the protruding length of the second tubular member 29 from the first tubular member 26 are provided at equal intervals in the axial direction. I have.
[0027]
Further, the elastic body 25 has locking means 35 for locking and unlocking the second tubular member 29 with respect to the first tubular member 26.
[0028]
The locking means 35 includes a lever holding member 36 fitted to the outer surface of the other end of the first tubular member 26, and an operation lever rotatably provided on the lever holding member 36 via a pivot shaft 37. And a brake 39 pressed by the operation lever 38 and pressed against the outer surface of the second tubular member 29.
[0029]
Further, the tripod installation aid 11 locks the lower end (for example, a tapered stone projection with a sharp tip) of the extensible leg 13 of the surveying tripod 12 when the telescopic body 25 is deployed. The body 41 is provided.
[0030]
The locking body 41 is extended and contracted so that the bottom surface 41a of the locking body 41 is brought into surface contact with the installation surface S to separate (float) the base body 15 from the installation surface S so that the tripod installation auxiliary tool 11 can be used. 25 is provided rotatably at the tip side. That is, the locking body 41 is rotatably connected in all directions via a universal joint 42 such as a ball joint, which is a connecting means, to the other end of the telescopic body 25 on the distal end side of the second tubular member 29, for example. Have been.
[0031]
The locking body 41 has a main body 45 in which a concave portion 44 into which the lower end of the leg 13 of the surveying tripod 12 is inserted is formed. A small hole 46 is formed in the center of the bottom of the concave portion 44. The small hole 46 is opened in the bottom surface 41 a of the locking body 41. Further, a pair of projecting plate portions 47 that are spaced apart from each other and oppose to each other integrally project from the outer surface of the main body portion 45. A screw hole 48 is formed through each protruding plate portion 47.
[0032]
On the other hand, the universal joint 42 has a connecting shaft member 51 fitted on the inner surface of the other end of the second tubular member 29. A thread groove 52 is formed on an outer peripheral surface of a portion of the connection shaft member 51 protruding from the second tubular member 29, and a substantially spherical spherical member 53 is screwed into the thread groove 52. The spherical member 53 is held from both sides by a hemispherical sliding contact surface 55 of a screw member 54 screwed into a screw hole 48 of each protruding plate portion 47 of the locking body 41.
[0033]
Next, the operation and the like of the tripod installation aid 11 will be described.
[0034]
When the surveying tripod 12 is installed on the installation surface S in accordance with the surveying reference position S1 using the tripod installation aid 11, first, the three elastic bodies 25 set to the same length are centered on the support shaft 19. , The three elastic bodies 25 are extended from the base 15 in three directions at intervals of 120 degrees.
[0035]
Then, the tripod installation aid 11 in which the elastic body 25 is switched to the deployed state is placed on the installation surface S, and the base 15 is positioned at the surveying reference position such that the center thereof and the surveying reference position S1 match in plan view. It is arranged corresponding to S1.
[0036]
Thereafter, the lower ends of the three legs 13 of the surveying tripod 12 are inserted into the concave portions 44 of the main body 45 of the locking body 41 to engage the lower ends of the legs 13 with the locking body 41. Thereby, the lower end of the leg 13 of the surveying tripod 12 is locked by the locking body 41.
[0037]
For example, when the distance between the central base 15 and the surrounding locking body 41 needs to be changed, the first tubular member 29 The length of the protrusion from the 26 (the length of the elastic body 25) is adjusted.
[0038]
Next, the surveying tripod 12 is leveled out using a string weight or a laser device (not shown).
[0039]
For example, when the installation surface S is a slightly inclined surface with respect to the horizontal, the center of the surveying tripod 12, the center of the tripod installation auxiliary tool 11 (the center of the base body 15), and the survey reference position S1 match in plan view. The length of the leg 13 of the surveying tripod 12 is adjusted according to the inclination angle of the installation surface S. When the installation surface S is a horizontal surface, it is not necessary to adjust the length of the legs 13 if the lengths of the three legs 13 are the same in advance.
[0040]
After the leveling is completed, a surveying instrument is attached to the surveying tripod 12 installed on the installation surface S, and surveying is performed using the surveying instrument.
[0041]
When the tripod setting aid 11 is cleared after the survey, the projecting length of the second tubular member 29 is minimized, and the telescopic body 25 is rotated to be folded.
[0042]
According to such a tripod installation aid 11, the distance between the base body 15 and the locking body 41 can be adjusted by extending or contracting the elastic body 25 using the scale 32. Unlike the tripod installation auxiliary tool 1 described above, there is no need to attach and detach the chain 3 and reset the number of the chain pieces 3a, and the installation work of the surveying tripod 12 can be easily performed.
[0043]
In addition, in the conventional chain-type tripod installation aid 1, a state occurs in which the legs 13 of the surveying tripod 12 have different opening degrees and the lengths of the chains 3 are the same. In this case, since the three elastic members 25 are extended from the base 15 in three directions at intervals of 120 degrees, when the elastic members 25 have the same length, The engagement of the lower end of the tripod 13 allows each leg 13 of the surveying tripod 12 to be naturally opened at the same angle, so that the surveying tripod 12 can be quickly leveled.
[0044]
Furthermore, since the locking body 41 for locking each leg 13 of the surveying tripod 12 is rotatably provided on the distal end side of the telescopic body 25 via the universal joint 42, for example, as shown in FIG. The tripod installation aid 11 can be used in a state where the bottom surface 41a of the locking body 41 is in surface contact with the installation surface S and the base 15 is separated from the installation surface S. Therefore, even if the installation surface S has irregularities, the surveying tripod can be used. 12 can be quickly installed at a desired position corresponding to the survey reference position S1.
[0045]
On the other hand, for example, as shown in FIG. 5, when the anchor nut 61 is buried under the survey reference position S1 on the installation surface S, the base 15 is screwed into the anchor nut 61 to correspond to the survey reference position S1. By using the fixing bolt 62 which is an adapter that can be fixed at the position, the installation work of the surveying tripod 12 can be performed more easily.
[0046]
The fixing bolt 62 includes, for example, a hexagonal bolt 63 that is a threaded portion that can be screwed to the anchor nut 61, and a fitting portion 64 that can be fitted to and detached from the inner peripheral surface of the annular portion 16 of the base 15. And a contact portion 65 that contacts the upper surface of the annular portion 16 of the base 15.
[0047]
Then, after placing the tripod installation aid 11 with the elastic body 25 in the deployed state on the installation surface S, the fitting portion 64 of the fixing bolt 62 is fitted into the inner peripheral surface side of the annular portion 16 of the base 15, When the contact portion 65 is brought into contact with the upper surface of the annular portion 16 of the base 15 and the hexagon bolt 63 is screwed into the anchor nut 61, the base 15 is sandwiched between the contact portion 65 and the installation surface S from above and below. As a result, the base 15 is fixed at a position corresponding to the survey reference position S1 on the installation surface S. For this reason, the base 15 is not inadvertently shifted from the position corresponding to the survey reference position S1, and the work of installing the surveying tripod 12 can be performed more easily.
[0048]
The base 15 of the tripod installation aid 11 is not limited to the one in which the attached portion 17 is integrally provided on the outer peripheral surface of the annular portion 16 as shown in FIG. 6, for example, as shown in FIG. A plurality of pieces, each of which has the attached portion 17 protruded integrally on three non-adjacent outer surfaces of the annular portion 16 and is laid as a scaffold at a building site or the like on the remaining three planar outer surfaces of the annular portion 16, for example. A magnet 71 that is attached to an iron installation surface S made of an iron plate may be detachably provided. Each of the magnets 71 includes, for example, a case member 73 detachably attached to the planar outer surface of the annular portion 16 with screws 72, and a substantially rectangular plate-shaped magnet member 74 fitted and accommodated in the case member 73. It is composed of
[0049]
In addition, in the tripod installation aid 11 including the base 15 with the magnet 71, when the surveying tripod 12 is installed on the installation surface S, the magnet 71 is attracted to the installation surface S so that the displacement of the base 15 is appropriately adjusted. Since the base 15 is not inadvertently displaced from the position corresponding to the survey reference position S1, the installation work of the surveying tripod 12 can be performed more easily.
[0050]
Further, as shown in FIG. 6, for example, a grooved rubber plate (rubber pad) 75 which is an annular friction increasing member may be attached to the bottom surface 41a of the locking body 41 so that the locking body 41 does not shift. Good.
[0051]
On the other hand, the elastic body 25 of the tripod installation aid 11 is not limited to the one configured by two tubular members. Good.
[0052]
In addition, the locking body 41 of the tripod installation assisting tool 11 is not limited to one that is rotatably provided on the distal end side of the elastic body 25. For example, although not shown, it is provided integrally with the distal end of the elastic body 25. May be used.
[0053]
Further, the tripod installation aid 11 is most suitable for the surveying tripod 12, but can be applied to other types of tripods.
[0054]
【The invention's effect】
According to the first aspect of the present invention, the distance between the base and the locking body can be adjusted by the expansion and contraction of the expansion and contraction body, so that the tripod can be easily installed.
[0055]
According to the second aspect of the present invention, since the base can be used away from the installation surface by the rotation of the locking body, it is possible to appropriately cope with irregularities on the installation surface.
[0056]
According to the third aspect of the present invention, the elastic body can be easily expanded and contracted by adjusting the length of the second tubular member projecting from the first tubular member.
[0057]
According to the fourth aspect of the present invention, it is possible to know the protruding length of the second tubular member from the first tubular member at a glance of the scale.
[0058]
According to the fifth aspect of the invention, the base can be appropriately prevented from being displaced by attracting the magnet to the installation surface.
[0059]
According to the invention of claim 6, since the base can be fixed by screwing the fixing bolt to the anchor nut, the operation of installing the tripod can be performed more easily.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of a tripod installation aid of the present invention.
FIG. 2 is a perspective view of the same tripod installation aid in the unfolded state.
FIG. 3 is a perspective view showing a use state of the tripod installation aid according to the first embodiment;
FIG. 4 is a schematic side view of the tripod installation aid with the base lifted.
FIG. 5 is a perspective view showing a fixing bolt of the tripod installation aid according to the first embodiment.
FIG. 6 is a perspective view showing another embodiment of a tripod installation aid (with magnet) of the present invention.
FIG. 7 is a perspective view showing a conventional tripod installation aid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Tripod installation auxiliary tool 12 Surveying tripod which is a tripod 13 Leg 15 Base 25 Elastic body 26 First tubular member 29 Second tubular member 32 Scale 41 Lock body 61 Anchor nut 62 Fixing bolt 71 Magnet S Installation surface

Claims (6)

A substrate;
Three expandable and contractible members that are rotatably provided on the base and that are expanded when rotated.
A tripod-mounting aid provided on the distal end side of each of the telescopic members, for locking the lower ends of the legs of the tripod. 2. The tripod installation aid according to claim 1, wherein the locking body is rotatably provided at a distal end side of the elastic body so that the base can be used away from the installation surface. The tripod installation aid according to claim 1 or 2, wherein the telescopic body has at least a first tubular member and a second tubular member inserted into the first tubular member so as to be adjustable in projecting length. 4. The tripod setting aid according to claim 3, wherein a scale indicating a protruding length of the second tubular member from the first tubular member is provided on an outer surface of the second tubular member of the elastic body. The tripod installation aid according to any one of claims 1 to 4, wherein the base is provided with a magnet that is attracted to the installation surface. The tripod installation aid according to any one of claims 1 to 5, further comprising a fixing bolt capable of fixing the base by screwing to the anchor nut.

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