JP3199274U - staff - Google Patents

Abstract

A staff suitable for use in height measurement with the upper side as a base point (zero) is provided. A stuff 1 is formed by connecting a front end member 2, a first intermediate member 3, a second intermediate member 4 and a base end member 5 made of a rectangular tube-shaped member. Different color schemes are attached, and the front surface 11 is provided with a positive scale 6 continuous from the lower end to the upper end. Has been. [Selection] Figure 1

Description

  The present invention relates to a survey staff (surveying standard).

In construction work, level surveying (level surveying) may be performed in order to measure the current state of terrain or structures, the situation before and after construction, and the like.
In leveling, the height of a measurement point is measured by collimating a bar-shaped member called a staff (measurement measure) with a surveying instrument called a level. In general, a staff is formed by connecting a plurality of cylindrical bodies that can be stored in a cylindrical body on the base end side (see, for example, Patent Document 1).

In tunnel construction, the height of the top of the tunnel may be measured for the purpose of inspection of the finished shape of the tunnel lining concrete and construction management during tunnel excavation.
When measuring the height of the top of the tunnel, it is common to provide a target such as a prism at the top of the tunnel and measure using a measuring device such as a total station.
However, it is necessary to perform the measurement at the top of the tunnel as quickly as possible because it is necessary to temporarily stop the construction.
Therefore, as a method of measuring the height of the tunnel top, there is a case where the scale of the staff arranged at the tunnel top is measured with a level. At this time, if the staff is arranged so that the zero (base point) of the scale is at the top of the tunnel, the calculation work can be omitted and the finished shape and construction accuracy can be evaluated based on the measured values.

Japanese Patent No. 3559403

The scale of the staff is attached so that the base end becomes zero and the scale increases toward the front end.
Therefore, in order to set the graduation zero at the tunnel top end, as shown in FIG. 4, it is necessary to make the staff reverse to the normal use state, but the thick and heavy base end 101 is on the upper side, It is unstable because it holds the thin and light tip 102.
Further, if the staff 100 is tilted due to a loss of balance during surveying, the leading end 102 of the staff 100 may not withstand the load and may be damaged.

  The present invention aims to solve the above-mentioned problems, and provides a staff suitable for height measurement using the upper side as a base point (zero), such as measurement of the height of the tunnel top. This is the issue.

  In order to solve the above problems, the present invention is a staff in which a plurality of bar members are connected, and the bar member on the base end side is formed of a cylindrical body that can store the bar member on the tip end side. The bar positioned at least on the most distal end side is provided with an inverted scale that increases from the distal end toward the proximal end.

  According to such staff, since the scale with the tip of the rod on the most distal side being zero is attached, when surveying with the tip in contact with the measuring point, more than the rod on the tip side A thick bar on the base end side can be held. Therefore, for example, even when the tip (zero) is brought into contact with the top of the tunnel, the survey can be performed in a stable state, and even if the balance is lost for some reason, Less likely to break.

The plurality of bar members are formed of a rectangular tube-like member, and on the surface that is one side surface among the four side surfaces of the respective bar members, the most distal end from the proximal end of the rod member located on the most proximal side A positive scale that increases toward the tip of the bar located on the side may be attached, and the reverse scale may be attached to a back surface that is a side surface opposite to the front surface.
According to such staff, it is possible to use both for leveling with the lower side as the base point (zero) and for leveling with the upper side as the base point (zero).
Further, if different colors are given to the front surface and the back surface, it is easy to distinguish the front surface from the back surface, so that errors during surveying can be reduced.

  If the staff of the present invention is used, it becomes possible to easily perform height measurement with the upper side as the base point (zero), such as measurement of the height of the tunnel top.

(A) Front view showing a staff according to an embodiment of the present invention, (b) is a rear view of the staff, (c) is an enlarged view showing a positive scale, and (d) is an enlarged view showing an inverted scale. . It is a perspective view which shows the state which contracted the staff. It is sectional drawing which shows the usage condition of a staff. It is sectional drawing which shows the measurement condition of the conventional tunnel top end height.

In the present embodiment, the staff 1 used for measuring the reference height of the top edge of the tunnel lining concrete will be described.
As shown in FIGS. 1A and 1B, the staff 1 includes four rectangular tube-shaped members having a rectangular cross section, that is, a distal end member 2, a first intermediate member 3, a second intermediate member 4, and a proximal end member 5. It is comprised by connecting so that expansion-contraction is possible in an axial direction.
The staff 1 of the present embodiment has four square cylindrical members connected to each other, and has a total length of 7 m in a stretched state (a state in which each cylindrical member is pulled out). The number and length of the rectangular tubular members are not limited and may be set as appropriate.
Moreover, each rod-shaped member which comprises the staff 1 is not limited to a rectangular tube-shaped member, For example, polygons other than a rectangle, circular, etc. may be sufficient.
Furthermore, although the material which comprises the front-end | tip member 2, the 1st intermediate member 3, the 2nd intermediate member 4, and the base end member 5 is not limited, For example, it has predetermined intensity | strength, such as an aluminum alloy, and It is desirable to be lightweight.

As shown in FIG. 1 (c), the surface 11 of the staff 1 has a scale (hereinafter referred to as “normal scale 6”) that increases upward, from the base end (lower end) of the staff 1 to the front end (upper end). It is attached continuously over the entire length.
On the other hand, as shown in FIG. 1 (d), the back surface 12 of the staff 1 is provided with a scale (hereinafter referred to as “inverted scale 7”) that increases downward from the tip (upper end) of the tip member 2. . In addition, as shown in FIG.1 (b), although this embodiment demonstrates the case where the reverse scale 7 is attached | subjected only to the front-end | tip member 2, the range to which the reverse scale 7 is attached is not limited. For example, it may be attached over the entire length of the staff 1.

In the present embodiment, the inverted scale 7 is attached with a paint that is easy to see in a dark place (for example, a fluorescent paint or a daylight paint). In addition, the coating material of the reverse scale 7 and the positive scale 6 is not limited.
On the surface 11 of the staff 1, a color arrangement section 13 in which a paint such as yellow is colored and a colorless section 14 in which a white paint is arranged are alternately arranged at a pitch of 1 m. On the other hand, the back surface 12 of the staff 1 is unified into a single color. In addition, the back surface 12 does not necessarily need to be a single color, for example, the same color as the front surface 11 may be given a different color at 1 m pitch. Further, the front surface 11 and the back surface 12 may be given the same color or different colors.

As shown in FIG. 2, the tip member 2 has a cross-sectional shape that can be stored inside the first intermediate member 3. A protective material 21 is fixed to the tip of the tip member 2. The outer width of the protective member 21 is larger than the inner width of the first intermediate member 3, and when the tip member 2 is stored in the first intermediate member 3 (when contracted), the entire tip member 2 is the first intermediate member. It does not enter the member 3.
The material constituting the protective material 21 is not limited as long as the tip member 2 can be prevented from being damaged even if an impact is applied to the tip of the tip member 2 for some reason. What is necessary is just to comprise. The protective material 21 may be provided as necessary.
In the present embodiment, the case where the tip member 2 is formed of a rectangular tubular member will be described. However, the tip member 2 is not necessarily a tubular member, and may be a solid rod, for example.

The first intermediate member 3 has a cross-sectional shape that can be accommodated in the second intermediate member 4. A protective material 31 is formed on the outer surface of the distal end portion of the first intermediate member 3, and the outer width of the distal end portion of the first intermediate member 3 is configured to be larger than the inner space width of the second intermediate member 4. ing. Therefore, the entire first intermediate member 3 does not enter the second intermediate member 4 when the first intermediate member 3 is stored in the second intermediate member 4 (when contracted). The material constituting the protective material 31 is not limited as long as the damage to the first intermediate member 3 can be prevented even if an impact is applied to the tip of the first intermediate member 3 for some reason. For example, a plastic resin may be used.
The protective material 31 of the present embodiment has a C-shape in plan view, and is provided so that an opening is disposed on the surface side. The protective material 31 may be provided as necessary and may be omitted.

The second intermediate member 4 has a cross-sectional shape that can be housed inside the proximal end member 5. A protective material 41 is formed on the outer surface of the distal end portion of the second intermediate member 4, and the outer width of the distal end portion of the second intermediate member 4 is configured to be larger than the inner space width of the base end member 5. Yes. Therefore, when the second intermediate member 4 is stored in the proximal end member 5 (when contracted), the entire second intermediate member 4 does not enter the proximal end member 5. The material constituting the protective material 41 is not limited as long as the damage to the second intermediate member 4 can be prevented even if an impact is applied to the tip of the second intermediate member 4 for some reason. For example, a plastic resin may be used.
The protective material 41 of the present embodiment has a C-shape in plan view, and is provided so that an opening is disposed on the surface side. The protective material 41 may be provided as necessary and may be omitted.

Protection members 51 and 52 are fixed to the upper end and the lower end of the base end member 5, respectively.
The protective members 51 and 52 prevent the base end member 5 from being damaged when an impact is applied to the end of the base end member 5 for some reason.
The protective material 51 provided at the upper end of the base end member 5 has a C shape in plan view. The protective material 51 is configured so that the opening portion is disposed on the front surface side so that the positive scale is not hidden by the protective material 51.
The protective material 52 provided at the lower end of the base end member 5 covers the lower end of the base end member 5.
The material which comprises the protective materials 51 and 52 is not limited, For example, what is necessary is just to comprise by plastic resin. In addition, what is necessary is just to provide the protective materials 51 and 52 as needed.
Further, as shown in FIG. 1B, a level 8 is attached to the back surface 12 of the base end member 5.

  As shown in FIG. 3, surveying of the tunnel top using the staff 1 is performed in a state where the top surface of the staff 1 is in contact with the top of the tunnel T while the back surface 12 of the staff 1 is opposed to the surveying instrument. At this time, the base end member 5 may be held by an operator or a support member.

According to the staff 1 of the present embodiment, since the inverted scale 7 with the tip of the tip member 2 which is a thin and light part being zero is attached, even when the zero of the staff 1 is brought into contact with the tunnel top end, It is possible to survey the tunnel top end while holding the base end member 5 which is thicker than the tip end member 2. Therefore, surveying can be performed in a stable state, and there is no possibility that the staff 1 will be damaged even if the balance is lost for some reason.
The staff 1 has both the regular scale 6 and the inverted scale 7, so that the leveling with the lower side of the ground surface as the base point (zero) and the upper side of the tunnel top such as the base point (zero) It can be used for both leveling and leveling.
Moreover, since the color scheme is different between the front surface 6 and the back surface 7 of the staff 1, the front surface 6 and the back surface 7 can be distinguished at a glance. Therefore, it is possible to prevent a mistake that the correct scale 11 and the inverted scale 12 are misread.

The embodiment according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and the above-described components can be appropriately changed without departing from the spirit of the present invention.
In the above embodiment, the case where the front scale 11 is attached to the front surface 11 of the staff 1 and the upside down scale 7 is attached to the back surface 12 has been described. May be. In this case, the staff 1 does not necessarily have to have the positive scale 6.
Although the said embodiment demonstrated the case where the staff 1 was used for the top end surveying of a tunnel, the use location of the staff 1 is not limited. For example, it may be used for inspection of a finished plate such as a box culvert.
Staff 1 may also be used for the scale of on-site photographs.
Although the case where the inverted scale 7 was previously attached to the front-end | tip member 2 was demonstrated in the said embodiment, you may stick the sealing material and attached member to which the inverted scale 7 was attached to the front-end | tip member 2. FIG.
The method of using the staff 1 is not limited. For example, when the staff 1 is used for measuring the shape of the tunnel lining concrete (lining thickness), the tip of the tip member 2 is in contact with the ground. Thus, the position of the surface of the lining concrete may be measured by the inverted scale 7.

1 Staff (Survey staff)
11 Front surface 12 Back surface 13 Colored section 14 Colorless section 2 Tip member (bar)
3 First intermediate member (bar)
4 Second intermediate member (bar)
5 Base member (bar)
6 Normal scale 7 Inverted scale

Claims (3)

A staff consisting of a plurality of bars connected,
The base material on the base end side is formed of a cylindrical body that can store the bar material on the front end side,
The staff characterized by the above-mentioned. The staff which has an upside-down scale which increases as it goes from the front-end | tip to the base end is attached | subjected to the said rod material located at the most front end side. The plurality of bars are made of a rectangular tube-shaped member,
The surface, which is one of the four side surfaces of each bar, increases from the base end of the bar positioned closest to the base end toward the tip of the bar positioned closest to the front end. With a positive scale,
The staff according to claim 1, wherein the reverse scale is attached to a back surface that is a side surface opposite to the front surface.   The staff according to claim 2, wherein different colors are applied to the front surface and the back surface.

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