JPH08233501A - Telescopic staff rod - Google Patents

Abstract

PURPOSE: To make it possible to perform the simple, accurate mounting by mutually butting thin, short-tubular molded pieces against with each other at the extreme expanded ends of sliding, and to make their engaging and disengaging movement light and sure especially by engaging the pair of the molded pieces by click pawls. CONSTITUTION: A thin, sort-tubular molded piece 8 is coupled into the inner surface of an original scale 1 so as to fill the gap with an intermediate scale 3. Furthermore, a thin short-tubular molded piece 9 is coupled to the outer surface of the opposite-end part of the intermediate scale 3 so as to fill the gap with the original scale 1 after the intermediate scale 3 is coupled into the original scale 1. In the surrounding wall of the original scale 1, a pair of engaging holes 13 for accepting fixing slant projections 12 respectively are provided. The molded pieces 8 and 9 are butted against with each other at the extreme expanded end positions of the intermediate scale 3 for the original scale 1 respectively and have butting surfaces 25 and 26, which act as the stoppers. The concave and protruding engagements are mated at the butting surfaces 25 and 26 by click pawls 27 and 28.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] Measure the measuring staff used for level setting for surveying the building and its site, or the distance between the base end of the cylindrical case and the tip of the straight scale that can be extended from the case. , The internal ruler, or the function of the surveying standard and the internal ruler, which is read on the scale on the straight scale (commonly called the inspection scale) at the tip of the cylindrical case, In this case, it is desirable to use a so-called telescopic box scale, and the present invention proposes an improvement for this type of telescopic box scale aiming at appropriate operability.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 63-35370 discloses an inner stopper in which a plurality of scale rods, which are sequentially inserted and removed, are locked inward at one end of the receiving side. It is disclosed that the extension displacement limit of the scale rod that brings the stoppers closer to each other is used under the contact of the re-stopper with the use of the stopper and the outer stopper locked on the other end side of the fitting side. Further, such a mechanism is followed by the scale unit in the digital display length measuring device disclosed in Japanese Utility Model Laid-Open No. 5-87514, but for positioning at the extension displacement limit,
In the former case, a boss that projects inward and slides in pressure contact with an outer stopper is provided on the fitted scale rod, and in the latter case, the transparent means for displacement is used for the locking means and releasing means of each measuring rod. It is necessary to provide holes and through holes for operation.

[0003]

The processing of the scale rod and the measuring rod in the prior art is complicated, and the structure is complicated. In any of the conventional examples, the stopper has a scale rod or a measuring rod. Since the two internal and external structures are combined, it requires complicated assembly.However, in the present invention, a pair of thin-walled short tubular molding pieces are prepared as stoppers, and so-called snap-fitting is used. The purpose of the present invention is to enable a simple and accurate mounting by a method, and particularly to engage and disengage the pair of these molded pieces by click claw engagement so as to make the removal both light and reliable.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there are provided a multi-cylinder which can fit in multiple layers with a slight gap between the inside and the outside, and can be extended and contracted with each other. A thin wall that occupies the inner periphery of the end portion, and conversely occupies the inner portion of the outer periphery of the opposite end portion, and fills the above gaps to fit each other, and has inclined ridges for fitting and killing the locking holes formed in each of the peripheral walls. A stopper with click claws, which is made up of a pair of short tubular shaped pieces, which abut one another at the extreme position of extension of the sliding movement, and which mutually elastically engage each time the extreme position is occupied. It is a telescopic box scale that is matched with the length scale in the longitudinal direction of the peripheral surface of each multi-cylinder as useful as.

Further, according to the present invention, a top cap having a hollow hole is provided on the inner circumference of the end of the innermost tube of the multiplex tube, and a bottom fitting having a central opening is provided on the outer circumference of the opposite end of the outermost tube. The present invention is also applicable to the present invention, and further, the present invention is such that a screw seat piece is fixed to a through hole formed in the peripheral wall of one of the multiple cylinders that relatively occupies the outer side, and a screw is attached to the screw seat piece. To prevent and hold the inner and outer multiple cylinders at any extended position, and to form a chrysanthemum-shaped concavo-convex on the inner surface of the knob of this push screw, and make contact with this concavo-convex at the protruding end to surround the push screw diagonally. The spring ring may be engaged with the rotation stop hole of the screw seat, or each of the multiple cylinders has a rectangular and similar cross-sectional shape, and the multiple cylinder has at least one of opposite sides of the rectangle. Has a measuring tape mounting groove The measuring tape has a series of graduations with the bottom surface of the bottom metal fitting as the zero point. It has an inspection scale to read directly on
It is also possible to mount both tapes having respective scales on the front and back of the multi-cylinder.

1A to 1D show the front surface, the back surface, and the left and right side surfaces of the retractable box scale of the present invention in the retracted and retracted position, and the enlarged plane of FIG. 2A is shown in FIG.
FIG. 3 shows an enlarged cross section taken along the line AA of FIG. 3, and FIG.
Reference numeral 1 is a main scale, 2 is a front scale, 3 is a middle scale, and a multi-cylinder that fits in a similar rectangular cross section with a slight gap inside and outside, and the middle scale 3 has a number according to the number of expansion and contraction stages. It can be increased or omitted. 4 and 5 are set screws that hold the extension position.
6 is a top cap, and 7 is a bottom fitting.

FIG. 4 is a partially disassembled state of assembling the above-described telescopic box scale, in which the tip scale 2 is already attached to the intermediate scale 3 and then the intermediate scale 3 is to be attached to the original scale 1. 8 is a thin-walled short-cylindrical molded piece that fits into the inner circumference of the end of the base 1 by filling the gap between the base 3 and the base 3, and 9 is the base 1 on which the formed piece 8 is mounted. It is a thin-walled, short-cylindrical shaped piece that is fitted with the middle length 3 and then fitted into the outer circumference of the opposite end of the middle length 3 with a gap between the middle length 3 and the main length 1.

The molded piece 8 has a slit 11 for allowing a slight elastic deformation of a pair of raised edges 10 that abut against the end of the base 1 and a pair of inclining projections 12 for fitting and killing which are narrowed by the elastic deformation. And a pair of locking holes 13 for receiving the slanting projections 12 for killing the fitting, respectively.

A through hole 14 and a pair of small holes 15 sandwiching the through hole 14 are formed in the peripheral wall of the base 1 near one of the locking holes 13, and a boss 16 fitted into the through hole 14 and a rotation stopper fitted in the small hole 15. A screw seat piece 18 having a pin 17 is mounted from the inside of the master 1 and the push screw 4 is screwed into the boss 16 to bend the rotation stop pin 17 toward the boss 16, and the tip of the push screw 4 is locally attached. Set it up and deform it to prevent it from coming off.

Although not shown in the figure, chrysanthemum-shaped irregularities are provided on the inner surface of the knob of the push screw 4, and a spring ring 19 that obliquely surrounds the push screw 4 is brought into contact with this irregularity and is locked in one of the small holes 15. By doing so, it is preferable to generate a light continuous sound when the push screw 4 is rotated.

The molding piece 8 is pushed into the end portion of the scale 1 after the push screw 4 is mounted on the scale 1 in advance as described above. At this time, the screw seat piece 18 does not interfere with the thread. A cutout is provided in a part of the peripheral wall. On the other hand, the molded piece 9 is opened by its peripheral wall near the opposite end of the middle scale 3 so as to be mounted and fixed to the outer periphery of the opposite end of the middle scale 3 inserted through the molded piece 8 from the end of the original scale 1. A slanting ridge 22 for killing the stop hole 21;
It has a bridge 23 that abuts against the end face of the middle scale 3 in the mating position, and 24 is a slit for guiding the elastic deformation of the molding piece 9 that facilitates the above-mentioned engagement.

In addition to what has been described above, the molding pieces 8 and 9 abut against each other at the extreme extension position of the middle scale 3 with respect to the main scale 1 and serve as stoppers 25 and 2 which serve as stoppers.
6 and has click claws 27 and 28 which serve as stoppers on the abutting surfaces 25 and 26, respectively. The procedure for assembling the middle scale 3 to the main scale 1 described above is almost the same in the application to the middle scale 3 of the front scale 2.
A pair of molding pieces partially shown in the figure is referred to as 8 ',
It is indicated by 9 '. Further, the top cap 6 and the bottom metal fitting 7 are attached by screws 29 as shown in the figure regarding the bottom metal fitting 7.
Is used to fix the tip 2 and the master 1.

The through hole 30 shown for the bottom metal fitting 7 is
If the top cap 6 not shown in the figure is also provided in the form of a through hole in advance, it communicates with the internal cavity of the telescopic box scale, so that it is easy to eliminate the dust that enters the box scale due to outdoor work or the like. You can

[0014]

【Example】

Example 1 As shown in FIG. 1A, a series of scales having the bottom surface of the bottom metal fitting 7 as a zero point are attached to the front surfaces of the main scale 1, the middle scale 3 and the tip scale 2 in their maximum extension state. Therefore, it can be used as a surveying staff. Further, in this case, a unit scale such as every 10 cm may be used as a boundary scale having a different color scale.

Example 2 As shown in FIG. 1b, the scale 1 is used as a case, and the tip portion of the tip 2 in that case is slightly pulled out and enlarged, as shown in FIG. The inner dimensions from the bottom metal fitting 7 to the top cap 6 which are not shown in the figure are measured by the scale of the scale 2 at the reading point of the medium scale 3 and after the maximum extension of the scale 2 is exceeded, At the reading point, any of the scales of the medium scale 3 can be used as a measurement scale and can be directly read by the operator while operating the internal ruler.

Embodiment 3 By applying Embodiments 1 and 2 to the front and back surfaces of a telescopic box scale, they can be used both as an internal ruler and a surveying staff.

[0017]

EFFECTS OF THE INVENTION According to the present invention, the assembly of the stopper for restricting the extension movement of the telescopic box scale using the multiple cylinder in the extreme extreme position hand is very simple, and the regulation can be performed extremely accurately and the operation is extremely light. It is not necessary to separately provide the locking means and the releasing means for the pulling operation and the pushing back operation, and there is no concern that the locking means and the releasing means may be misaligned during long-term use.

[Brief description of drawings]

FIG. 1 is a front, back, and left and right side projection views.

FIG. 2 is an enlarged plan view and a sectional view.

FIG. 3 is an expanded front view.

FIG. 4 is an explanatory diagram of a partial disassembly and assembly procedure.

FIG. 5 is a rear view partial detail view.

Claims (9)

[Claims] 1. A multi-cylinder capable of fitting in multiple layers with a slight gap between the inside and the outside and expanding and contracting with each other, and an inner circumference of an end of one of the multi-cylinders which occupies relatively outside, conversely. A pair of thin-walled short tubular molded pieces having a slanting ridge for fitting and fitting with respect to the locking holes formed in each of the peripheral walls, which fills the above gaps and fits at the outer circumferences of the opposite ends occupying the inside. And these molded pieces abut against each other at the extreme position of extension of sliding and serve as stoppers with click claws that cause mutual elastic engagement each time this extreme position is occupied. Telescopic box scale that matches the length scale in the longitudinal direction of the peripheral surface. 2. A top cap having a hollow hole is provided on the inner circumference of the end of the innermost tube of the multiplex tube, and a bottom fitting having a central opening is provided on the outer circumference of the opposite end of the outermost tube. The extendable box scale according to claim 1. 3. The inner and outer multiple cylinders are arbitrarily extended by fixing a screw seat piece to a through hole formed in the peripheral wall of the multiple cylinder that relatively occupies the outer side, and attaching a set screw to the screw seat piece. Claim 1 or 2 which made it useful for holding restraint in a position.
Telescopic box scale described in. 4. An inner surface of a knob of a push screw is provided with chrysanthemum-shaped irregularities, and a spring ring which comes into contact with the irregularities at a projection end and obliquely surrounds the push screw is locked in a detent hole of a screw seat. Telescopic box scale described in. 5. The telescopic box scale according to any one of claims 1 to 4, wherein each of the multiple cylinders has a rectangular shape and a similar cross-sectional shape. 6. The telescopic box scale according to claim 5, wherein the multiple cylinder has a mounting groove for a measure tape on at least one of opposite sides of the rectangle. 7. The surveying staff according to claim 6, wherein the measuring tape has a series of graduations whose zero point is the bottom surface of the bottom fitting. 8. The measuring tape according to claim 6, wherein the measuring tape has a measuring scale for directly reading the extension length from the bottom surface of the bottom metal fitting to the top cap, which occupies the outside of the multi-cylinder, as a reading point. Internal ruler. 9. A box measure for both surveying staff and internal ruler, wherein both tapes of claims 7 and 8 are mounted on the front and back of a multi-layer cylinder.