JP3353126B2 - Attachment structure of telescopic arm to column and method of assembling telescopic arm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching a telescopic arm to a column and a method for assembling the telescopic arm. This arm is used, for example, to attach a sensor for traffic volume survey.

[0002]

2. Description of the Related Art Today, various sensors and transmission / reception devices are installed at a plurality of locations along a road, and are used for investigating traffic volume of a car, managing traveling speed, or exchanging information with an on-vehicle navigation system. Usually, a device for managing such traffic information is attached to an arm protruding so as to cross a road (for example, a height of about 6 m). That is, a support is provided on the side of the road, an arm is fixed at right angles to the support, and the sensor and the like are attached to the arm. One end of the arm is fixed by a ring-shaped holding metal fitting fitted to the column, but a hanging member made of a steel rod is used to reinforce the fixing to the column. The suspending member connects the other end or the intermediate portion of the arm with a predetermined portion of the support column above the holding bracket, and holds the arm in a suspended state. The arm used here is composed of one galvanized steel pipe, is not provided with a telescopic mechanism, and is not configured to be able to be divided. In addition, the hanging member is also formed of one steel bar, and is not configured to be able to be divided.

[0003]

However, in the case of a conventional arm having no telescopic mechanism, arms of various sizes must be manufactured according to the width of the road, which is uneconomical. In particular,
Those having a length exceeding 5 m are inconvenient for handling, transportation and storage. The same can be said for the hanging material.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and provides a structure for attaching a telescopic arm to a column and a method for assembling the arm. That is, in the mounting structure of the present invention, the telescopic arm is mounted in a direction orthogonal to the column, and the arm is held by a suspending member that connects a predetermined position in the longitudinal direction of the arm and a predetermined position above the mounting position of the arm on the column. A mounting structure for a telescopic arm, wherein the arm has a nested telescopic structure, and the suspension member is a split type.

[0005] Here, the arm is a stretchable arm in which a plurality of pipes having different diameters are assembled in order from a larger diameter to a smaller diameter, and the arm is made expandable and contractable. An annular wedge is driven in between. When changing the length of the arm, a predetermined length of the pipe inscribed therein is drawn from the outer pipe, and an annular wedge is driven between the end of the outer pipe and the inscribed pipe to fix the position of the inscribed pipe. Further, if the two pipes are penetrated by bolts, the position of the inscribed pipe can be reliably fixed.

The pipe may have a circular cross section or a polygon. When a polygonal pipe is used, the wedge has a corresponding cross-sectional shape. The material of the pipe is not particularly limited as long as it has sufficient strength for use. However, aluminum pipes are preferred because of their strength and weight, ease of processing, and availability of materials. Further, the number of pipes may be appropriately selected according to the length required for the arm.

For example, when the pipe has a circular cross section, a cylindrical wedge having one end thin and the other end thick is used. By driving the wedge, the gap between the end of the outer pipe and the pipe inscribed therein is filled, and the positions of both pipes are fixed. The material of the wedge is preferably the same as the material of the pipe. This is for making the degree of thermal expansion of both the same. Also, the end of the pipe into which the wedge is driven,
It is preferable that the inner diameter be increased toward the open end. With this configuration, the contact area between the wedge and the pipes located inside and outside thereof can be increased, and the two pipes can be more firmly integrated.

[0008] On the other hand, the suspension member is composed of a fixed length portion used regardless of the length of the arm and a supplementary portion selected according to the length of the arm and connected to the fixed length portion. The material of the hanging member is not particularly limited as long as it has sufficient strength to hold the arm in a suspended state. Generally, steel bars are preferred. It is preferable to use a nut to connect the fixed length portion and the supplementary portion. A cylindrical nut having a female screw formed on the inner surface is prepared, and a male screw is formed on the end of the fixed length portion and the supplementary portion. Then, the fixed length portion and the supplemental portion may be screwed from both ends of the nut. In this way, if the hanging material is divided and a fixed length portion of a fixed length and a supplement portion of several lengths are prepared, an arm of various lengths can be held by a combination of the two. it can. When the arm length is short,
The arm is held only by the fixed length part or by adding a short supplementary part to the fixed length part. Conversely, when the arm is long, a long supplementary part may be added to the fixed length part.

Next, a method of assembling the telescopic arm will be described.
The method for assembling the telescopic arm is characterized in that when a wedge is driven between the end of the pipe and the pipe inscribed therein, an annular hammer externally fitted to the inscribed pipe is used. The hammer strikes the end of the wedge at the end of the hammer and presses the wedge between the end of the pipe and the pipe inscribed therein. The shape of the hammer is not particularly limited as long as it fits outside the drawn pipe. If the cross section of the pipe is circular, the hammer is cylindrical. The inner diameter of the hammer is slightly larger than the outer diameter of the drawn pipe so that the hammer can slide smoothly along the pipe. If this is extremely large, the hammer will rattle when sliding, and it will be difficult to accurately catch the end face of the wedge with the end face of the hammer.

[0010] The material of the hammer is not particularly limited.
However, it is desirable to use a material having a large specific gravity so that a sufficient striking force can be obtained for driving the wedge at a fixed sliding distance. For example, it is made of steel and the weight is 2
About kg is preferable. It is desirable to provide a handle on the hammer for the convenience of sliding. When driving the wedge with a hammer, it is necessary to hold the pipe inscribed in the outer pipe so as not to shift. In that case, the outer pipe and the pipe inscribed therein may be penetrated by a pin to prevent displacement between the two. There is no need to particularly form a hole through the pin. This is because the through hole of the bolt may be used. Normally, when driving the wedge, hold the pin with one hand so that the pin does not come off due to the impact,
Operate the hammer with the other hand. However, in order to hold the pin with one hand and operate the hammer with the other hand, the hammer and the pin may be too far apart. In that case, a hammer can be easily operated by attaching a rope to the hammer and pulling the rope.

By the way, in order to drive a wedge, a sufficient sliding distance is required to accelerate the hammer. However, if the length of the pipe inscribed from the outer pipe is short, it is not possible to secure a sufficient sliding distance to accelerate the hammer. Therefore, an auxiliary pipe is connected to the drawn pipe, and a hammer is externally fitted to the auxiliary pipe to secure a sliding distance of the hammer. The diameter of the auxiliary pipe should be the same as the diameter of the pipe to be drawn. The material of the auxiliary pipe is not particularly limited. In addition, an engagement device having an engagement concave portion and an engagement convex portion may be used for a connection portion between the drawn pipe and the auxiliary pipe.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments. FIG. 1 is a side view showing a state where an extended arm of the present invention is attached to a column, and FIG. 2 is a plan view showing a state where a shortened arm of the present invention is attached to a column. An arm 2 is attached at right angles to a column 1 standing upright on the side of the road.
The tip side and the intermediate portion are held by the hanging members 3 and 4, and the root side (the support side) is held by the supporting member 5. Arm 2
It is composed of two pipes, an outer pipe 2A and an inner pipe 2B. The total length of the arm is adjusted by pulling out the inner pipe 2B from the outer pipe 2A. One end of the outer pipe 2A was fixed with a holding metal fitting 6 fitted externally to the column 1, and the inner pipe 2B was inserted into the other end.

The outer pipe 2A has a bolt hole 7 penetrating in a diametrical direction at a predetermined distance (60 cm in this example) from the other end.
Is provided. On the other hand, the inner pipe is provided with a plurality (five in this example) of bolt holes 8 penetrating in the diameter direction at a predetermined interval (in this example, 50 cm), and a cable takeout hole 9 is formed at an appropriate place. The cable outlet 9 draws a cable (not shown) housed in the arm out of the arm 2 and passes it through various sensors (for example,
It is used to connect to traffic volume survey sensors and vehicle speed detection sensors.

A wedge 10 is driven between the other end of the outer pipe 2A and the inner pipe 2B. FIG. 3 shows a cross section of the other end of the outer pipe and a cross section of the wedge 10. The inner diameter of the other end of the outer pipe is
As shown in FIG. 3A, the size is increased toward the opening end. As shown in FIG. 1B, the wedge is formed of a tapered portion 10A having a uniform inner diameter and becoming thinner toward one end, and a stop portion 10B continuously forming the other end. . The outer diameter of the stop 10B is the taper 10A
Or larger than the outer diameter of the outer pipe 2A. Therefore, wedge 10
Is stopped at the position where the boundary end face between the stop portion 10B and the tapered portion 10A abuts on the end face of the outer pipe, even when it is driven deepest. Further, in this example, a cut 11 along the axial direction was formed in the tapered portion 10A. Due to the cut 11, the tapered portion 10A has a slight flexibility in the radial direction. Therefore, the driven wedge 10 is composed of the outer pipe 2A and the inner pipe 2B.
Slightly deformed in accordance with the shape of the gap between the two pipes and the pressure contact force between the two pipes 2A and 2B, thereby increasing the contact area between the two pipes and securely fixing the position of the inner pipe 2B.

Next, a method of driving the wedge 10 between the end of the outer pipe and the inner pipe 2B will be described. FIG. 4 is an explanatory diagram thereof. As shown in FIG. 1A, a cylindrical hammer 12 is used for driving the wedge 10. Hammer
Numeral 12 has an inner diameter slightly larger than the outer diameter of the inner pipe 2B, and the [handle 13 of the mold is fixed to the outer periphery. Further, in this example, a rope 13 is tied to the handle 13. First, the pull-out length of the inner pipe 2B is determined on the ground, and when the bolt holes 7, 8 of the outer pipe 2A and the inner pipe 2B are aligned, the pin 15 is penetrated there, and the positions of both pipes are temporarily fixed. Next, the wedge 10 is externally fitted to the inner pipe 2B from the tip, and the tapered portion 10A is positioned between the other end of the outer pipe and the inner pipe 2B. The hammer 12 also fits over the inner pipe 2B, slides along the inner pipe, hits the end face of the wedge stopper 10B with the end face of the hammer 12, and fits the wedge 10. At this time, the pin 15 is held down with one hand and the hammer 12 is operated with the other hand so that the pin 15 does not fall off due to the impact at the time of hitting. The hammer 12 may be gripped by the handle 13 or operated by pulling the rope 14. When the wedge 10 is driven in, as shown in FIG.
Pull out the pin 15, penetrate the bolt 16 there, nut 17
To fix the positions of both pipes 2A and 2B. In FIG. 4, a sliding ring 18 is fitted on one end side (in the outer pipe) of the inner pipe 2B. The sliding ring 18 is made of stainless steel and has an outer diameter substantially equal to the inner diameter of the outer pipe. Thereby, the sliding of the inner pipe 2B with respect to the outer pipe 2A is smoothed, and the one end of the inner pipe is prevented from rattling in the outer pipe. If there is an unused cable lead-out hole 9, the grommet 19 is fitted therein.

Here, if the wedge 10 is not properly driven, as shown in FIG. 5, the wedge 10 is pulled out by hitting the stopper 10B using the hammer 12 fitted to the outer pipe 2A, and the above procedure is repeated. I just need to do it. The above procedure has no problem when the draw-out length of the inner pipe 2B is long and the distance for sliding the hammer 12 can be sufficiently secured. However, if the pull-out length of the inner pipe 2B is short, the sliding distance of the hammer 12 is also short, and it is difficult to obtain a sufficient impact force for driving the wedge 10. In this case, as shown in FIG. 6, the auxiliary pipe 20 is added to the inner pipe 2B to secure the sliding distance of the hammer 12. Auxiliary pipe
20 has the same diameter and the same material as the inner pipe 2B. To reinforce the inner pipe 2B and the auxiliary pipe 20, a disc-shaped engaging device to be fitted to the end of each pipe is used. In this example, an engaging concave portion 21 having a hole formed in the center and an engaging convex portion 22 having a protrusion which is compatible with the hole in the center were used. The engaging concave portion 21 is fitted into the end of the inner pipe, and the engaging convex portion 22 is fitted into the end of the auxiliary pipe. And these two pipes 2A, 2B
By sliding the hammer 12 along, the striking force sufficient to strike the wedge 10 is obtained. Thus, arm 2
By making it telescopic, it can be used according to the width of the road, and storage and transportation are also convenient. As in the prior art, when a single steel pipe is galvanized, the length of the arm is restricted by the size of the galvanizing tank, but such a restriction can be eliminated by a telescopic arm.

The dimensions of the actually manufactured arm are shown below (see FIG. 3). With this arm, the length can be adjusted at intervals of 50 cm in a range of 5 m to 7 m. Outer pipe: outer diameter D ₁ = 60.2 mm, inner diameter d ₁ = 52 mm, length 4750 mm inner diameter d ₂ at the open end = 52.6 mm open angle θ ₁ = 1.17 ° at the inner edge of end length L of open portion ₁ = 30 mm Inner pipe: outer diameter D ₂ = 49.9 mm, inner diameter d ₃ = 41.9 mm length 2850 mm Wedge: stopper outer diameter D ₃ = 65 mm, inner diameter d ₄ = 50 mm Open end outer diameter D _{4 of the} tapered part = 51.6 mm Outer diameter D _{5 of the} tapered portion at the stop portion side = 52.8 mm Length L _{2 of the} tapered portion L ₂ = 50 mm, Length L ₃ of the stop portion = 15 mm Taper angle θ ₂ = 1.38 °

In order to firmly fix the inner pipe 2B to the outer pipe 2A, it is desirable that the above dimensions have the following relationship. Outside of the outer pipe inner diameter d _1> opening end outer diameter D ₄ outer pipe open end inside diameter d ₃ <opens in preventing portion side outer diameter D ₅ end periphery of the tapered portion angle theta> taper angle theta ₂ stop portion of the tapered portion Diameter D ₃ > Outer diameter D _{1 of} outer pipe

Next, a procedure for attaching the arm, to which the wedge has been driven, to the column will be described. As shown in FIGS. 1 and 2, the holding bracket 6, the support member 5, and the suspension members 3 and 4 are used for attachment to the column. The holding bracket 6 is a support 1
And a socket 6A on the outer periphery of which an outer pipe 2A is fitted. The outer pipe 2A is integrated with the grip 6 with a bolt 23 that penetrates the socket 6A.
The support member 5 is a pipe whose both ends are crushed flat, and has a screw hole in this flat portion. Separate holding members 24 and 25 are provided above and below the holding member 6 integral with the outer pipe 2A, and both holding members 24 and 25 and the outer pipe 2A are connected by a total of four support members 5.
That is, the outer pipe 2A is held by the support member 5 from above, below, left and right. For connection between the support member 5 and the outer pipe 2A, a mounting bracket 26 is used which is flat at both ends and has screw holes, and a middle part is formed by a curved surface adapted to the outer shape of the outer pipe. The outer pipe 2A is sandwiched between the pair of mounting brackets 26, and the screw holes of the support member 5 are aligned with the screw holes of the mounting bracket 26, and the screws are penetrated therethrough and tightened with nuts to support the outer pipe 2A. Materials 5 can be connected. The connection between the grip metal 6 and the support member 5 was performed in substantially the same configuration.

Thus, the base of the arm 2 is held by the column 1, but the hanging member 3 is used for holding the tip. FIG. 7 shows the configuration. The hanging member 3 is made of a steel bar and includes a fixed length portion 3A used regardless of the length of the arm, and a supplementary portion 3B selected according to the length of the arm and connected to the fixed length portion 3A.
In each case, one end is bent annularly to form a connection hole 27, and the other end is formed with a male screw on the outer periphery. The fixed length section 3A and the supplementary section 3B are different only in length. Standard length section used in this example
The lengths of 3A and supplementary part 3B are as follows. Standard length part (left side from connection nut in FIG. 7A): 4000 mm Supplementary part: 2580 mm (right side from connection nut in FIG. 7A), 1610 mm (FIG. 7B), 250 mm (FIG. 7C)

FIG. 7 shows the connection between the fixed length section 3A and the supplementary section 3B.
The connection nut 28 and the lock nut 29 shown in (D) were used.
The connection nut 28 has a hollow hexagonal column shape, and a female screw is formed on the inner periphery so that the male screw of the hanging member 3 is screwed from both ends. The lock nut 29 is screwed to the external thread of the suspension member 3 at both ends of the connection nut 28.

The holding of the arm by the hanging member is performed as follows. According to the length of the arm assembled on the ground, a supplementary part 3B of a suitable length is selected, and this supplementary part 3B is connected to the fixed length part 3A. A lock nut 29 is screwed into each of the male screws of the fixed length portion 3A and the supplementary portion 3B, and both male screws are screwed to both ends of the connection nut 28. Next, connect the lock nut 29 to the connection nut 28
And securely connect the fixed length section 3A and the supplementary section 3B. The suspension member 3 and the distal end side of the arm 2 are connected by the same fitting as the fitting 26 used to connect the support member 5 and the outer pipe. That is, both ends are flat and have screw holes, and the middle part is the inner pipe 2B
Use a mounting bracket composed of a curved surface that conforms to the external shape. The tip of the inner pipe is sandwiched between a pair of mounting brackets. Then, by aligning the connection hole 27 at the end of the hanging member with the screw hole of the mounting bracket, penetrating the screw through the hole and tightening it with a nut, the tip of the inner pipe and the hanging member 3 can be connected. On the other hand, a turnbuckle 30 is used to connect the hanging material 3 to the support side.
(See FIG. 1). A holding bracket 31 is attached to a predetermined position above the holding bracket 6 of the column 1. This grip
31 is provided with a hook that engages with the turnbuckle 30. Then, one end of the turnbuckle 30 is hooked on the hook and the other end is hooked on the hanging member 3, and the length of the turnbuckle 30 is adjusted to hold the arm 2 so that the hanging member 3 does not slack. In this example, the suspension member 4 (length 2860 mm or 3780 mm) is also connected between the intermediate portion of the arm 2 and the column 1. The hanging member 4 has a connecting hole formed by bending both ends in an annular shape, and one end of the hanging member 4 is externally fitted to the support column 1.
The other end is connected to the outer pipe 2A.

The correspondence between the length of the arm and the length of the suspension member is shown below. Arm length Suspended material 4 Suspended material 3 5.0m 3780mm-5.5m-Fixed length + supplementary part (250mm) 6.0m 2860mm Fixed length + supplementary part (250mm) 6.5m 2860mm Fixed length + supplementary part (1610mm) 7.0m 3780mm Fixed length + Supplement (2580mm) In this way, by making the arm extendable and the hanging material divided, the arm and the hanging material are adapted to the width of the road to be installed. Can be eliminated. Further, by shortening the arm and dividing the hanging material, it is possible to facilitate transportation and storage.

FIG. 8 shows a hammer having a configuration different from that described above. This is configured such that a semi-cylindrical member is hinged and can be freely opened and closed. The hammer 10 shown in FIG. 4 is simply cylindrical and needs to be fitted from one end of the pipe to strike the wedge. On the other hand, the hammer 50 shown in FIG.
It can be attached directly from the side of the pipe 2B in the open state. Therefore, there is no need to fit it from one end of the pipe 2B. When used, the two semi-cylindrical members 50A and 50B are closed as shown in FIG. 8 (A), and used like the hammer 10 shown in FIG. Further, when removing, as shown in FIG. 8B, it is convenient to open both half-cylindrical members 50A and 50B.

[0025]

As described above, since the arms are telescopic, one arm can be used according to various road widths, which is convenient. In addition, since the suspension member is divided, the arm can be attached to the column corresponding to the arm having various lengths. In addition, both the arm and the hanging material are convenient for transportation and storage. Furthermore, when assembling the telescopic pipe, a wedge can be easily driven in by using an annular hammer fitted to the pipe.

[Brief description of the drawings]

FIG. 1 is a side view showing a mounting structure of a telescopic arm according to the present invention.

FIG. 2 is a plan view showing a state in which the arm of FIG. 1 is reduced.

3A is a sectional view of an end of an outer pipe, and FIG. 3B is a sectional view of a wedge.

FIG. 4A is an explanatory view of a procedure for driving a wedge.
(B) is sectional drawing which shows the state which penetrated the outer pipe and the inner pipe with the bolt.

FIG. 5 is an explanatory view of a procedure for removing a driven wedge.

FIG. 6 is an explanatory view of a procedure of adding an auxiliary pipe to a tip of an inner pipe and driving a wedge.

FIG. 7A is a plan view showing a hanging member connecting a fixed length portion and a supplementary portion, FIG. 7B is a plan view showing a supplementary portion of a middle scale,
(C) is a plan view showing a short supplementary portion, and (D) is a plan view showing a connection nut and a lock nut.

FIG. 8A is an explanatory diagram showing a closed state of the openable hammer, and FIG. 8B is an explanatory diagram showing the opened state thereof.

[Explanation of symbols]

1 Support 2 Arm 2A Outer pipe 2B Inner pipe
3,4 Suspension material 3A Standard size part 3B Supplement part 5 Support material 6 Grasping bracket
6A socket 7,8 Bolt hole 9 Cable exit hole 10 Wedge 10A Taper part 10B Stop part 11 Cut 12 Hammer 13 Handle
14 Rope 15 Pin 16 Bolt 17 Nut 18 Sliding ring 19 Grommet 20 Auxiliary pipe 21 Engagement recess 22 Engagement protrusion 23 Bolt 24,25 Gripping bracket 26 Mounting bracket 27 Connection hole 28 Connection nut 29 Lock nut 30
Turnbuckle 31,32 Gripping bracket 50 Hammer 50A, 50B Semi-cylindrical member

──────────────────────────────────────────────────続 き Continued from the front page (72) Minoru Okabe, Inventor, 1-3-1, Shimaya, Konohana-ku, Osaka-shi, Japan Sumitomo Electric Industries, Ltd. Osaka Works (56) References: Japanese Utility Model Reference Sho-57-78499 (JP, U) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) E04H 12/24 E04H 12/20 F16B 7/14

Claims (6)

(57) [Claims] Attachment of a telescopic arm which attaches a telescopic arm in a direction orthogonal to a column, and holds the arm with a suspending member connecting a predetermined position in the longitudinal direction of the arm and a predetermined position above the mounting position of the arm on the column. The arm comprises a plurality of pipes having different diameters stacked in order from a larger diameter to a smaller diameter, and an annular wedge is provided between an end of each pipe and a pipe inscribed therein. The hanging member is composed of a fixed length portion used regardless of the length of the arm, and a supplementary portion of a fixed length selected according to the length of the arm and connected to the fixed length portion. A structure for mounting the telescopic arm on a support column. (2)Assembling the telescopic arm attached to the support
The methodThe telescopic arm, Multiple pipes with different diameters
Stretchable and stretchable in order from thin to thin
Between the end of each pipe and the pipe inscribed in it.
Assemble by driving the wedgeAnd  Externally fit an annular hammer on the pipe and place it along the pipe.
Telescopic, characterized by sliding into the wedge
How to assemble the arm. 3. The hammer hinges a pair of semi-cylindrical members,
3. The method for assembling a telescopic arm according to claim 2, wherein the telescopic arm is configured to be fitted to the outer periphery of the pipe by opening and closing. 4. The method for assembling a telescopic arm according to claim 2, wherein a rope is attached to the hammer, the rope is pulled, the hammer is slid along the pipe, and a wedge is driven. 5. A wedge is driven by an annular hammer while penetrating each pipe and a pipe inscribed therein with a pin, fixing the positions of both pipes.
5. The method for assembling the telescopic arm according to any one of the above items 4. 6. A method of assembling a telescopic arm attached to a column , wherein said telescopic arm includes a plurality of pipes having different diameters, which are stacked in order from a larger diameter to a smaller diameter and inserted and retracted. Freely assembled, assembled by driving an annular wedge between the end of each pipe and the pipe inscribed in it, adding an auxiliary pipe to the tip of the inscribed pipe, and fitting an annular hammer on it A method of assembling a telescopic arm, wherein a wedge is driven.