JPH0436401Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of use) The telescopic length measuring stick is a telescopic combination of multiple thin pieces having similar hollow cross sections according to the cross-sectional size, and in its extended state. Because of its high rigidity, it is particularly useful for measuring the vertical distance from the floor, the required length of diagonal braces in buildings, etc. This is because there is no inconvenience such as poor uprightness and bending when extended upward in the vertical direction, making it difficult to maintain the extended state.

Here, we would like to propose a particularly robust telescopic measuring stick that can stably and smoothly guide the expansion and contraction operations during length measurement operations using the telescopic measuring stick.

(Prior art) British Patent No. 1227592 and Utility Model Application No. 1987-
Publication No. 194005 describes a telescopic length measuring tool.

(Problem to be solved by the invention) Expansion and contraction measurements are performed by fitting a plurality of elongated pieces, which are extruded or drawn and whose hollow cross sections are uniform in the longitudinal direction and are similar to each other, into a telescopic device according to the cross-sectional size. When assembling it into a long pole, if the fitting gap between the front and rear elongated pieces is large, there will be a lot of rattling during extension, and if the fitting gap is narrow, the expansion and contraction will not be smooth. In this regard, in the prior art listed above,
A technique is disclosed in which the fitting part of the latter elongated piece is machined to use a sliding ring, a split spring, or a stopper cap and stopper holder, but it is difficult to use such a bush. When attached to the fitting part, the difference in size between the tip and rear elongated pieces increases accordingly, so it is impossible to avoid the disadvantage that the telescopic length measuring stick becomes thinner and weaker on the tip side.

Therefore, elongated pieces with similar hollow cross-sections formed by extrusion or drawing, which are assembled by telescopic fitting with a slight fitting gap, are directly fitted together with uniform cross-sections in the longitudinal direction. The purpose of this invention is to provide a robust telescoping length measuring rod that includes a sliding guide that can perform stable and smooth telescoping operations without requiring any special bushings or processing for adjusting the clearance.

(Means for solving the problem) In this invention, a plurality of elongated pieces having similar hollow cross sections formed by extrusion or drawing are fitted telescopically according to the cross-sectional size, and the first and second pieces are fitted adjacently to each other. Assuming that the outer cross-sectional contour and the inner cross-sectional contour of both elongated pieces match each other, an end piece and a mouthpiece are attached to the inside of the insertion end of the tapered elongated piece and the outer side of the receptacle end of the rear elongated piece, respectively. and the end piece engages with an aperture formed in the rear elongated piece at a predetermined extended position of both the adjacent front and rear elongated pieces, spaced apart from the mouthpiece, and the end piece is inserted into a flattened V-shape from the aperture. The mouthpiece has a retractable spring lateral positioning latch button that is exposed and extends over the entire circumference and end surface of the rear elongate section at the receptacle end thereof, and matches the outer cross-sectional contour of the tapered elongate section. a collar having a lip that is fixed to the tapered elongated piece; and a rattling prevention slide that is fixed by being press-fitted into the collar at the mounting position of the collar through a locking hole that aligns with an opening made in the rear elongated piece until it comes into pressure contact with the outer surface of the tapered elongated piece. a telescoping measuring stick, characterized in that it has a dynamic guide shoe, each of the elongated pieces having longitudinally continuous longitudinal graduations at their predetermined payout position, and further comprising: that the telescopic fit of the rear elongated piece results in an intervening filling of a friction member consisting of a raised pine secured to the tapered elongate piece adjacent to its end piece on the side opposite to the length graduation;
All of these are suitable as embodiments of the above idea.

Now, Fig. 1 illustrates the reduced state of the telescopic measuring stick according to this invention, and Fig. 2 illustrates the extended state of the main part.

In the figure, 1 is a storage base, and 2 is an extension part, both of which are preferably made of aluminum and have an extruded or drawn cross section of a rectangular cylinder, even if hollow. Part 2
is a slightly flat rectangular tube with a long side surface that is slightly smaller than the inner width of the rectangular tube;
On the other hand, it has a similar slightly smaller hollow cross section that fits directly with a very small gap.
Again, flat rectangular tubes and flat rectangular tubes that have the same relationship sequentially are used, and these are collectively referred to as a plurality of elongated pieces with symbols 2-1, 2-2, 2-
3 and 2-4, and therefore their sequential relationship is expressed by the magnitude of the digits at the end.

As illustrated in the reduced state in FIG.
-3 and 2-4 can be pushed in and stored in sequence, and in almost the same way as the well-known automatic retractable tape measure, the reel is equipped with a so-called barrel spring (not shown). Tape case 3 with built-in mechanism for wrapping major tape
It is possible to attach a horizontal vial 4 and a vertical vial 5, which serve as a guide for holding the longitudinal direction of the storage base 1 horizontally or perpendicularly thereto.

Although not shown in the figure, the tape case 3 is rotated by a guide roller r (see Fig. 1), which internally pivots the tape stored in the tape case 3 on the proximal end side of the storage base 1, and passes through the internal cavity of each elongated piece. After that, it is fixed to the insertion end of the most advanced elongated piece 2-4 (see Fig. 3).

In this way, it is possible to draw out and automatically retract the measure tape in response to the expansion and contraction operations of the stretching section 2, and at this time, the entire length from the base end of the storage base 1 to the tip of the stretching section 2 is extended from the diagonal section 3 of the tape case 3 to the tape case 3. The cursor 3-3 in the window hole 3-2 made in 1 is used as an index, and the adjustment is made so that the scale of the measure tape can be read.

The proximal end of the storage base 1 and the most advanced elongated piece 2-4
End members 6 and 7 are attached to the tips of the , and hook-shaped undulating calipers 8 are attached to each end member 6 and 7, respectively, and are retracted and expanded as shown in FIGS. 1 and 2 around the pivot pin 9. It is mounted so that it can be rotated through an angle of 90° to indicate each position, where 10 is an inner reference plane, 11 is an outer reference plane, and 12, 13
is a ruled line reference hole, and hole 13 is used for attaching an extension caliper 14 (second
It can also be used for bolt holes provided in Figure).

On the back side of the storage base 1 and the extension part 2, a segmental scale 15 having a continuous length in the longitudinal direction is provided at a predetermined feeding position of the storage base 1 and the extension part 2, as shown in FIG. It is preferable to make it have the following properties.

Fig. 2 shows a positioning latch button built into an end piece (not shown) for the most tapered elongated piece 2-4, and insertion of the most tapered elongated piece 2-4 to which this end piece is attached. The mouthpiece provided at the socket end of the next rear elongated piece 2-3 that receives the end is designated with numerals 16 and 17, respectively, and these are representative examples, occupying the inside and outside respectively. The assembly procedure for achieving a telescopic fit between the front and rear elongated pieces is shown in the exploded perspective view of FIG.

In FIG. 3, 18 is the end piece of the tapered long piece 2-4, in this case 19 is the fixed end of the measure tape, 20 is the insertion end of the tapered long piece 2-4,
Further, 21 is a socket end of the rear elongated piece 2-3.

Now, the end piece 18 is screwed by fitting it inside the insertion end 20 of the elongated piece 2-4 in the direction of the arrow in the figure, while the fixed end of the measure tape is passed through the cavity of the elongated piece 2-3. 19 is also screwed to the end piece 18, and the elongated part is passed through the mouthpiece 17, that is, the collar 22 which can be made of polycarbonate resin, which has been placed over the outside of the socket end 21 of the elongated part 2-3 in advance. Fit into the internal cavity of piece 2-3. That is, the end piece 18 has the same cross-sectional outer contour shape as the tapered long piece 2-4.

Thereafter, a locking hole 22-1 is provided in the collar 22 at the mounting position, and the locking hole 22-1 is aligned with the opening 23 formed in the rear elongated piece 2-3.
-1, and press-fit the sliding guide shoe 24 to prevent backlash until it comes into contact with the outer surface of the elongated piece 2-4 and fix it to the collar 22.

For example, the sliding guide shoe 24 to prevent backlash is
It is preferably made of ABS resin, and upon press-fitting, the opening 23 of the elongated piece 2-3 made of aluminum is preferably bonded with adhesive, and the locking hole 22-1 is bonded with heat.

In the figure, 22-2 is an inward flange-like lip of the collar 22 that covers the socket end 21, and this lip has a square hole that matches the cross-sectional outer contour of the tapered long piece 2-4. .

The end piece 18 of the tapered elongate section 2-4, which is fitted into the telescope in this way, has its rear end 18-1 closely matching the hollow contour of the rear elongate section 2-3.

By filling one side of the tapered long piece 2-4 with a friction member made of a raised mat 25,
It is possible to stabilize the operation by providing appropriate resistance to the insertion/extraction operation.

Both elongated pieces 2-3, 2-4 under the above fit
In order to firmly lock the predetermined extended state of the mouthpiece, a window hole 26 into which the previously mentioned positioning latch button 16 fits is formed in the rear elongated piece 2-3 as far away from the mouthpiece 17 as possible. .

As shown in detail in FIG. 4, the positioning latch button 16 is, for example, an arcuate recess 18-2 provided on the joint surface of the end piece 18, which has a two-piece construction.
and a sliding piece 16 with protrusions 16-1 that fit into horizontal groove groups 18-3 further carved therein.
A pair of spring seat holes 16-3 are opened in the opposing surfaces of the spring seat holes 16-2, and a spring 27 is built into the spring seat holes 16-3, so that the spring 27 can be moved in and out while being aligned with the window hole 26 (FIG. 3).

The operation surface exposed through the window hole 26 of the sliding piece 16-2 has a steep slope 16- on the drawer side of the tapered elongated piece 2-4.
4. On the opposite push-in side, the operation is stabilized by forming a flattened V-shape with a gentle slope 16-5.

The point of this telescopic fitting is between the tip and rear elongated sections 2-3 and 2-2, and between the tip and rear elongated sections 2-2.
The same applies between -2 and 2-1, and between the tapered long piece 2-1 and the storage base 1. However, the measure tape is not fixed and can be slid freely through the groove on the back side of the end piece 18.

(Function) The above-mentioned telescoping length measuring stick measure, as illustrated in Figure 5 a to f, allows you to perform length measurements by yourself that would require an assistant when using a conventional tape measure. I can do it.

(Example) In the case of the 5-stage extension type explained with reference to the figure, the length measurement limit can be about 3 m and 4 m, and the former is 840 mm when stored, and the latter is about 1040 mm, which is a length that is convenient for carrying.

(Effects of the invention) According to this invention, the extension and contraction operations of the telescopic measuring stick scale are
A plurality of elongated pieces having similar hollow cross sections formed by extrusion or drawing are directly telescopically fitted according to the cross-sectional size so that the outer cross-sectional contour and the inner cross-sectional contour of the first and second adjacent elongated pieces match each other. Since it is fitted, there is no need for special fitting parts such as machining or bushing.
Since the elongated piece on the distal end side can be made thicker, it is stable and smooth, the structure is strong, and manufacturing, especially assembly, is simplified.

[Brief explanation of the drawing]

Figure 1 is a projected view of the telescopic length measuring rod in the retracted position, Figure 2 is an explanatory diagram of the main parts in the extended position, Figure 3 is an explanatory diagram of fitting procedures, and Figure 4 is an exploded perspective view of the end piece. FIG. 5 is an explanatory diagram of the length measurement procedure. 1... Storage base, 2... Extension part, 2-1, 2-
2, 2-3, 2-4... Long piece, 16... Latch button, 17... Mouthpiece, 18... End piece, 22... Collar, 24... Guide shoe, 26... Window hole.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of elongated pieces having similar hollow cross sections formed by extrusion or drawing are telescopically fitted in sequence according to the cross-sectional size, and both the first and second elongated pieces are fitted adjacent to each other. An end piece and a mouthpiece are provided respectively on the inside of the insertion end of the tapered elongated piece and on the outside of the socket end of the rear elongated piece, assuming that the outer cross-sectional contour and the inner cross-sectional contour match each other. The piece engages with a window hole drilled in the rear elongated piece spaced apart from the mouthpiece at a predetermined extended position of both the front and rear elongated pieces adjacent to each other, and is exposed through the aperture in a flattened V-shape. The mouthpiece has a retractable spring-biased positioning latch button, and the mouthpiece has a collar that covers the entire circumference and end face of the rear elongated piece at the receptacle end and has a lip that matches the cross-sectional outer contour of the tapered elongated piece. , a sliding guide shoe that is press-fitted into the collar at its mounting position through a locking hole that aligns with an opening made in the rear elongated piece until it comes into pressure contact with the outer surface of the tapered elongated piece, and is fixed therein. A telescopic length measuring rod featuring: 2. The telescoping length measuring stick according to claim 1, in which each elongated piece has a length division continuous in the longitudinal direction at a predetermined feeding position thereof. 3. The telescopic fit of the leading and trailing elongated pieces results in an intervening filling of a friction member consisting of a raised mat fixed to the tapered elongated piece adjacent to its end piece on the opposite side of the length division graduation; The telescopic length measuring stick scale described in Claim 2 for Utility Model Registration.