JPH0628628U - Railing joint fitting - Google Patents

Abstract

(57) [Summary] [Purpose] The number of assembly parts of the leveling brackets is reduced,
To reduce the assembly work process, [Structure] A pair of metal fittings for slidably mounting two rails are overlapped back-to-back to rotatably connect the overlapped parts, and the crossed parts are orthogonal to each other. Also, a clip stopper that fixes in parallel position is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a staff for connecting a staff for connection to a staff for surveying.

[0002]

[Prior art]

 If the rails used in the general survey are connected so that they can be crossed vertically and horizontally and at the same time they can be slid, it is possible to perform measurements in two orthogonal directions, such as the depth and width of a gutter, at the same time. A fitting for such a staff is already proposed by Japanese Utility Model Publication No. 63-19763 (see FIG. 5). This fitting is made up of a pair of front and back metal fittings on which two rails can be slidably mounted, overlapped back to back, and the overlapped parts are rotatably connected. Locking holes are provided opposite to each other. By the engaging action of the and the engaging projection, both overlapping portions are fixed at positions orthogonal to and parallel to each other. As a specific method for connecting a pair of front and back metal fittings, conventionally, as shown in FIG. 5, the fitting insertion holes b and b'are made to correspond to the central portions of the overlapping portions a and a '. On the other hand, a pair of disc-shaped bullet plates d and d'having low depressions c and c'in the central portion are separately formed, and both depression portions c and c of the bullet plates d and d'are formed separately. ′ Is fitted into the fitting holes b and b ′ of the overlapping portions a and a ′ so as to face each other, and the central portions of both recessed portions c and c ′ are rotatably attached by a tack e under pressure. Then, the overlapping portions a and a'are sandwiched by the peripheral edge portions of both bullet plates d and d'through the elastic action of both recessed portions c and c ', so that the pair of one-side metal fittings are connected. I am trying.

[0003]

[Problems to be solved by the device]

 However, in the connecting method as described above, since the elastic plates d and d'are separately formed for the pair of front and back one side fittings, there is a drawback that the number of parts is increased. Prior to the work, the work of opening the fitting holes b, b'at the corresponding positions of the both overlapping parts a, a ', and forming the recesses c, c'in both bullet plates d, d', and Since the work for forming the insertion hole for the tack e is required at the center portion, there is a drawback that the number of working steps increases. Further, at the time of connection, with the insertion holes b and b'of both overlapping portions a and a'aligned with each other, the elastic plates d and d'are respectively held from both sides thereof, and the elastic plates d and d'are held. It has a drawback that the assembling work is troublesome because the ′ ′ must be pivotally attached by the tack e.

The present invention has been made in an attempt to improve it in view of the conventional situation as described above. The object of the present invention is to reduce the manufacturing cost by reducing the number of parts and the working process, and the one-sided metal fitting. This is to facilitate the assembly work when connecting the two and to improve the workability. And the concrete means and action are as follows.

[0005]

[Means for Solving the Problems]

 The present invention is formed by using spring steel as a material, and one tongue of the overlapping portion is provided on one surface of the overlapping portion from the center to the outer edge, preferably toward the four corners and protruding in the back direction, and on the surface of the other overlapping portion. Is to overlap the overlapping parts of the pair of one-sided metal fittings with the positioning engaging holes that engage with the tongue piece back to back, and crimp the surfaces of both overlapping parts with the studs inserted through the center parts of both overlapping parts. It is characterized in that it is pivotally attached in a rotatable state.

[0006]

[Action]

 Since the surfaces of the both polymerized portions are axially attached in a back-to-back pressure-bonded state, an elastic force is generated on the surfaces of the polymerized portions so that the two polymerized portions can be pressed against each other. As a result, even if a heavy rod is attached to the one-sided tool, it does not rattle during use, and the engaging protrusion can be reliably engaged with the locking hole, so that the rod is orthogonal and parallel. The position can be held firmly.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. In the drawings, 1a and 1b are a pair of one-sided metal fittings that form a leveling fitting, and the one-sided metal fittings 1a and 1b are formed by using spring steel as a material. The one-side metal fittings 1a, 1b are formed by overlapping flat plate-shaped overlapping portions 2a, 2b back to back, and the tongue piece 3 protruding from the center toward the four corners in the back direction on the surface of the overlapping portion 2a and the overlapping portion 2b, An engaging hole 6 for engaging with a circular convex portion 3'of the tip of the tongue piece 3 is provided. Insertion holes 5a and 5b of the tack 4 are formed in the central portions of the overlapping portions 2a and 2b, and both ends of the tack 4 inserted into the penetration holes 5a and 5b are axially pressed and caulked. Both overlapping surfaces 2a, 2b are rotatably pivoted in a crimped state, and the overlapping portions 2a, 2b are elastically urged by the tongue piece 3 of one overlapping portion 2a and the surface of the other overlapping portion 2b. To press.

At least the overlapping portions 2a and 2b are orthogonal to each other when the overlapping portions 2a and 2b are rotated around the stud 4 as a fulcrum, and are fixed in parallel positions. Thus, a plurality of tongue pieces 3 are provided in one overlapping portion 2a, and a plurality of engaging holes 6 that are engaged with the tongue pieces 3 are provided in the other overlapping portion 2b.

Further, L-shaped holding edges 7a, 8a and 7b, 8b are provided inwardly at opposite sides of the overlapping portions 2a, 2b so as to face each other. In the edges 7a, 8a and 7b, 8b, guides 9 with springs 9 "made of synthetic resin are fitted by claws 9 ', 9'and positioning holes 9", respectively. Each guide 9 is provided with a guide groove 10 having a U-shaped cross section inwardly. By engaging the side edge portion of the staff 11 with the guide groove 10, the sandwiching edges 7a, 8a and 7b, 8b are formed. Make sure that the staff 11 is slidably held between them.

In order to use the coupling fitting having the above-mentioned configuration, two staffs 11 are provided between the holding edges 7a, 8a and 7b, 8b of the one-side fittings 1a, 1b through the guide groove 10 of each guide 9. When sandwiched and rotated so that the two staffs 11 intersect at a right angle as shown in FIG. 3, the protruding tongue piece 3 of the overlapping portion 2a is engaged with the locking hole 6 of the overlapping portion 2b, and the protrusion 2 The staff 11 of the book is held at right angles. In this state, as shown in FIG. 4, for example, the depth and width of the gutter can be simultaneously measured. Further, when carrying, it is possible to hold the staffs in parallel in a state in which the staff is coupled through the engagement of the protruding tongue piece 3 and the locking hole 6. Although spring steel was used as the material for the pair of metal fittings on the one side, only the metal fitting on one side having the tongue piece may be made of spring steel. Further, the direction of the tongue and the position of the engaging hole that engages with the tongue are sufficient as long as they can be positioned, so any direction and position that allows positioning can be used.

[0011]

[Effect of device]

 According to the present invention, as described above, a pair of one-sided metal fittings are formed by using spring steel as a material, and a tongue piece is formed on one surface of the overlapped portion and the other surface is engaged with the tongue piece. By forming a dowel hole, and by axially attaching both polymerized parts in a crimped state by means of rivets inserted in the central part of both polymerized parts, a bullet plate can be separately formed as in the conventional case, or the bullet plate can be fitted. The work of providing the fitting holes in both of the above-mentioned overlapping parts is not required, and as a result, the number of parts and the work process are reduced, and the manufacturing cost can be reduced.

Further, as described above, since it is only necessary to pivotally attach the back-to-back overlapping portion insertion holes by tacks, the assembling work becomes easier and the workability thereof is improved. It has become possible to improve.

[Brief description of drawings]

FIG. 1 is a front view of a staff for connecting rods according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a front view showing a usage state.

FIG. 4 is an explanatory diagram showing a usage example of the above.

FIG. 5 is a side cross-sectional view showing a connection structure of a conventional staff-level fitting.

[Explanation of symbols]

 1a, 1b Metal fittings on one side 2a, 2b Overlapping part 3 Tongue piece 4 Tack 6 Locking hole 11 Scale

Claims (1)

[Scope of utility model registration request] 1. A pair of one-side metal fittings to which two staffs are slidably mounted are overlapped back to back to rotatably connect both overlapped parts, and both overlapped parts are fixed at orthogonal and parallel positions, respectively. As described above, in the leveling coupling metal fitting in which the locking hole and the engagement projection are provided in the overlapping portion in the opposed shape, the pair of one-side metal fittings are formed by using spring steel as a material, and the one-side metal fitting portion of the one-side metal fitting is formed. Is provided with a tongue piece protruding in the back direction from the center toward the outer edge and having a circular convex portion at the tip, and the surface of the other overlapping portion is engaged with the circular convex portion of the tongue piece. A leveling fitting, characterized in that a fitting hole is provided, and the surfaces of both overlapping portions are pivotally attached in a crimped state so that the surfaces of both overlapping portions are rotatably supported by rivets inserted through the centers of both overlapping portions.