Stay wire manufacturing tool

Abstract

The technical problem to be solved by the utility model is to provide the stay wire manufacturing tool which is small in size, light in weight, simple in structure, convenient to fold and carry, high in efficiency compared with manual manufacturing, and capable of effectively avoiding scratches. The stay wire manufacturing tool comprises a connecting base, a bending structure is arranged on the connecting base, the bending structure comprises a first movable plate, a second movable plate and a first connecting block, the first movable plate and the second movable plate are rotationally arranged on the connecting base through a first rotating shaft, and a concave wheel is arranged on the first rotating shaft in a sleeving mode; a cam is arranged between the first movable plate and the second movable plate through a space adjustable structure, a first stress application rod is arranged on the first connecting block, a second stress application rod is arranged on the lower middle portion of the connecting base, the first stress application rod is rotated to enable the cam to rotate around a first rotating shaft, and in the cam rotating process, the cam extrudes a pull wire to be bent along a groove of a concave wheel. The pull wire manufacturing device is easy to operate and suitable for being applied and popularized in the technical field of electric power tools.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric power tool technical field, concretely relates to a stay wire making tool. BACKGROUND

[0002] The electric power enterprise must guarantee the safe, stable and reliable operation of the power grid to deliver the green, environmental protection and clean electric power energy for the leap-forward development of the economic society. With the climate change and the deterioration of the natural environment, the electric power facilities suffer more and more influences, mainly showing that the wind frequency is high and the wind area is large, and the non-wind area also often blows strong wind to threaten the safe operation of the electric power line. Therefore, the stay wire is widely used in the overhead power transmission and distribution line, and the electric pole is often fixed by the stay wire in the special section of the line and the electric power construction process to ensure the safe and stable operation of the line and improve the safety in the construction process. The current stay wire manufacturing method is pure manual operation, and the manufacturing process is poor, so it is not easy to meet the requirements of the regulations and standards, and it leaves serious safety hazards for the safe operation of the line, and the manual stay wire manufacturing is easy to cause abrasion to the manufacturing personnel. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problem to provide a stay wire making tool, the stay wire making tool is small, light in weight, simple in structure and convenient to fold and carry, and is high in efficiency compared with the manual manufacturing, and effectively avoids abrasion.

[0004] The utility model adopts the technical scheme that the stay wire making tool comprises a connecting seat, and a bending structure is arranged on the connecting seat.

[0005] The bending structure comprises a first movable plate, a second movable plate and a first connecting block, one end of the first movable plate and the second movable plate is arranged at both ends of the first connecting block respectively and jointly forms a U-shaped structure.

[0006] One end of the first movable plate and the second movable plate is rotatably arranged on the connecting seat through a first rotating shaft.

[0007] A concave wheel is arranged on the first rotating shaft and located between the first movable plate and the second movable plate.

[0008] An adjustable spacing structure is arranged between the first movable plate and the second movable plate and is provided with a cam matched with the concave wheel.

[0009] A first force bar is arranged on the connecting block, and a second force bar is arranged on the middle and lower part of the connecting seat.

[0010] Further, the adjustable spacing structure comprises a third movable plate, a fourth movable plate and a second connecting block, one end of the third movable plate and the fourth movable plate is respectively arranged at two ends of the second connecting block and together forms a U-shaped structure and is located between the first movable plate and the second movable plate;

[0011] The first movable plate and the second movable plate are symmetrically provided with a sliding groove, the second rotating shaft is arranged in the sliding groove, two ends of the second rotating shaft respectively penetrates the third movable plate and the fourth movable plate, and the cam is sleeved on the second rotating shaft;

[0012] A threaded hole is arranged at the center position of the first connecting block, and a lead screw matched with the threaded hole is arranged in the threaded hole;

[0013] A circular hole is arranged at the center position of the second connecting block, one end of the lead screw is located in the circular hole and is movably connected with the second connecting block, and the other end of the lead screw is connected with one end of the first force rod.

[0014] Further, a threaded hole is arranged at the upper end face of the second connecting block and communicates with the circular hole, and a jam nut matched with the threaded hole is arranged in the threaded hole.

[0015] Further, an auxiliary positioning structure is arranged on the second rotating shaft;

[0016] The auxiliary positioning structure comprises an expansion plate, and the expansion plate comprises a fixed plate and an adjusting plate;

[0017] A second sliding groove matched with the fixed plate is arranged at the lower end face of the adjusting plate, one end of the fixed plate is located in the second sliding groove and is tightly matched with the second sliding groove, and the other end of the fixed plate is sleeved on one end of the second rotating shaft close to the second movable plate;

[0018] A fixed rod with a rectangular cross section is arranged on one side of the adjusting plate close to the second movable plate and is located directly above the cam, and a baffle is arranged at the other end of the fixed rod;

[0019] The first clamping plate and the second clamping plate are symmetrically arranged on the fixed rod through an elastic assembly, the upper end face of the first clamping plate and the second clamping plate is flush with the upper end face of the adjusting plate, and the first clamping plate and the second clamping plate are used for clamping the wire and ensuring that the wire is located at the central position.

[0020] Further, the elastic assembly comprises a first compression spring arranged between the first clamping plate and the adjusting plate;

[0021] A second compression spring is arranged between the second clamping plate and the baffle and has the same specification as the first compression spring;

[0022] In the initial state, the first compression spring and the second compression spring are in a natural elongation state, and the first clamping plate and the second clamping plate are in contact with each other.

[0023] Further, a side surface of the fixed plate away from the second movable plate is provided with a first scale line;

[0024] A side surface of the adjusting plate is provided with a second scale line and is located on the same side as the first scale line.

[0025] Further, the outer sides of the first force rod and the second force rod are each sleeved with a force arm lengthening pipe, which is in interference fit with the first force rod or the second force rod.

[0026] The utility model discloses the beneficial effects of:

[0027] 1. Through the interval adjustable structure, the cam is moved, the gap between the concave wheel and the cam is increased, the end of the pull wire is passed through the gap between the concave wheel and the cam, the cam is reversely moved through the interval adjustable structure, the gap between the cam and the concave wheel is reduced and the pull wire is clamped, then the first force rod is rotated, the cam rotates around the first rotation shaft, in the process of cam rotation, the cam extrudes the pull wire and bends along the groove of the concave wheel, thereby realizing the production of the pull wire, the whole process does not need to directly contact the pull wire, effectively avoids the scratch, through the first force rod and the second force rod, the production efficiency is effectively improved.

[0028] 2. The device is composed of a first movable plate, a second movable plate, a first connecting block, a first rotation shaft, a concave wheel, a cam, a first force rod, a second force rod, an interval adjustable structure and the like, which has simple structure, low production cost, small size, light weight and portability. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structure schematic view of the pull wire production tool of the utility model;

[0030] Figure 2 It is the structure schematic view of the bending structure of the utility model;

[0031] Figure 3 It is the bending structure of the utility model and the structure schematic view of the auxiliary positioning structure combination;

[0032] Figure 4 It is the bending structure of the utility model and the structure schematic view of the auxiliary positioning structure combination;

[0033] Figure 5 It is the structure schematic view of the auxiliary positioning structure of the utility model;

[0034] Figure 6Another specific embodiment structure diagram of the stay wire manufacturing tool is disclosed by the utility model.

[0035] Marked in the figure: connecting seat 1, bending structure 2, first movable plate 201, second movable plate 202, first connecting block 203, first rotating shaft 204, concave wheel 205, convex wheel 206, first force adding rod 3, second force adding rod 4, spacing adjusting structure 5, third movable plate 501, fourth movable plate 502, second connecting block 503, sliding groove 504, second rotating shaft 505, screw rod 506, auxiliary positioning structure 6, telescopic plate 601, fixed plate 6011, adjusting plate 6012, fixed rod 602, baffle 603, first clamping plate 604, second clamping plate 605, first compression spring 606, second compression spring 607, jacking bolt 7, first scale line 8, second scale line 9, force arm lengthening pipe 10, stay wire 11. DETAILED DESCRIPTION

[0036] The specific embodiments of the utility model will be further described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0037] It should be noted that all directional instruction terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like as used in the present application, indicate the orientation or position relation based on the drawings shown, and are only for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application, and are only used to explain the relative position relation, movement condition and the like between the components in a certain posture, if the certain posture changes, the directionality indication also changes accordingly.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relation between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0040] like Figures 1-6 As shown, the wire drawing tool includes a connector 1, which is generally rectangular in shape, and a bending structure 2 is provided on the connector 1.

[0041] The bending structure 2 includes a first movable plate 201, a second movable plate 202, and a first connecting block 203. One end of the first movable plate 201 and the second movable plate 202 are respectively disposed at both ends of the first connecting block 203 and together form a U-shaped structure. The thickness of the first connecting block 203 is greater than the thickness of the first movable plate 201 and the second movable plate 202.

[0042] One end of the first movable plate 201 and the second movable plate 202 are rotatably mounted on the connecting seat 1 via the first rotating shaft 204. One end of the first rotating shaft 204 is provided with a hexagonal head, similar to the head of a bolt, and the other end is provided with threads and a nut to prevent the first rotating shaft 204 from falling off. Alternatively, a screw clip and a nut can be used. The first movable plate 201 and the connecting seat 1 slide in contact to avoid interference or excessive resistance. In other words, the U-shaped structure formed by the first movable plate 201, the second movable plate 202, and the first connecting block 203 can rotate freely around the first rotating shaft 204.

[0043] A concave wheel 205 is sleeved on the first rotating shaft 204 and located between the first movable plate 201 and the second movable plate 202. The two ends of the concave wheel 205 are in sliding contact with the first movable plate 201 and the second movable plate 202 respectively. The concave wheel 205 is tangent to the three end faces of the first movable plate 201 or the second movable plate 202 that are close to the concave wheel 205.

[0044] The first movable plate 201 and the second movable plate 202 are provided with a cam 206 matched with the concave wheel 205 through the spacing adjustable structure 5, the spacing adjustable structure 5 is used to move the cam 206 so as to adjust the spacing between the concave wheel 205 and the cam 206, the spacing adjustable structure 5 is convenient for the pull wire 11 to pass through or clamp the pull wire 11, and meanwhile, the spacing adjustable structure 5 can be matched with different specifications and models of the pull wire 11, so that the application range is wide, and the spacing adjustable structure 5 is not limited to a certain specification and model of the pull wire 11;

[0045] The first connecting block 203 is provided with the first force adding rod 3, and the middle and lower part of the connecting seat 1 is provided with the second force adding rod 4, in use, the cam 206 is moved through the spacing adjustable structure 5, so that the spacing between the concave wheel 205 and the cam 206 is increased, then the end of the pull wire 11 is passed through a certain length, generally 40-50 cm, from the gap between the concave wheel 205 and the cam 206, the cam 206 is reversely moved through the spacing adjustable structure 5, so that the gap between the cam 206 and the concave wheel 205 is reduced and the pull wire 11 is clamped, then the first force adding rod 3 is rotated, so that the cam 206 rotates around the first rotating shaft 204, in the rotating process of the cam 206, the cam 206 extrudes the pull wire 11 to bend along the groove of the concave wheel 205, so that the production of the pull wire 11 is realized.

[0046] As shown in Figure 2 , Figure 3 In the embodiment, as preferred, the spacing adjustable structure 5 comprises a third movable plate 501, a fourth movable plate 502 and a second connecting block 503, one end of the third movable plate 501 and one end of the fourth movable plate 502 are respectively arranged at two ends of the second connecting block 503 to jointly form a U-shaped structure and are located between the first movable plate 201 and the second movable plate 202, the thickness of the second connecting block 503 is greater than the thickness of the third movable plate 501 and the fourth movable plate 502, that is, the two sides of the U-shaped structure formed by the third movable plate 501, the fourth movable plate 502 and the second connecting block 503 are respectively in sliding contact with the first movable plate 201 and the second movable plate 202;

[0047] The first movable plate 201 and the second movable plate 202 are symmetrically provided with a sliding groove 504, the second rotating shaft 505 is arranged in the sliding groove 504, and the cam 206 is sleeved on the second rotating shaft 505;

[0048] The first connecting block 203 is provided with a threaded hole in the center position, and a screw rod 506 matched with the threaded hole is arranged in the threaded hole;

[0049] The center of the second connecting block 503 is provided with a circular hole, one end of the lead screw 506 is located in the circular hole and the two are movably connected, generally bearing connection, the other end of the lead screw 506 is connected with one end of the first force rod 3, by rotating the first force rod 3, the lead screw 506 moves along the threaded hole, the lead screw 506 will drive the second connecting block 503 to move, thereby making the second rotating shaft 505 move along the sliding groove 504, that is, the cam 206 is close to or away from the concave wheel 205, so as to adjust the distance between the concave wheel 205 and the cam 206.

[0050] As shown in Figure 2 , Figure 3 In the embodiment, in order to avoid the distance between the concave wheel 205 and the cam 206 being changed randomly by rotating the first force rod 3 in the bending process, the upper end surface of the second connecting block 503 is provided with a threaded hole which is in communication with the circular hole, and a jam nut 7 matched with the threaded hole is arranged in the threaded hole, after adjusting the distance between the concave wheel 205 and the cam 206, the jam nut 7 is tightened to prevent the lead screw 506 from rotating, thereby preventing the distance between the concave wheel 205 and the cam 206 from being changed randomly.

[0051] As shown in Figure 4 , Figure 5 , Figure 6 In the embodiment, since the end of the pull wire 11 passes through a certain length, generally 40-50 cm, from the gap between the concave wheel 205 and the cam 206, the end of the pull wire 11 will randomly swing, which is not conducive to positioning and bending. Therefore, the second rotating shaft 505 is provided with an auxiliary positioning structure 6.

[0052] The auxiliary positioning structure 6 includes an extension plate 601, and the extension plate 601 includes a fixed plate 6011 and an adjusting plate 6012.

[0053] The lower end surface of the adjusting plate 6012 is provided with a second sliding groove 504 matched with the fixed plate 6011, one end of the fixed plate 6011 is located in the second sliding groove 504 and the two are tightly matched, the other end of the fixed plate 6011 is fixedly sleeved on one end of the second rotating shaft 505 close to the second movable plate 202, that is, the fixed plate 6011 cannot rotate around the second rotating shaft 505, and in the initial state, the lower end surface of the adjusting plate 6012 is in contact with the upper end surface of the second movable plate 202.

[0054] The upper end of the adjusting plate 6012 facing the second movable plate 202 is provided with a fixed rod 602 with a rectangular cross section and located directly above the cam 206. The other end of the fixed rod 602 is provided with a baffle 603. The fixed rod 602 with a rectangular cross section is used to ensure that the first clamping plate 604 and the second clamping plate 605 can only move along the length of the fixed rod 602 and will not rotate around the fixed rod 602.

[0055] The fixing rod 602 is symmetrically fitted with a first clamping plate 604 and a second clamping plate 605 via an elastic component. The upper surfaces of the first clamping plate 604 and the second clamping plate 605 are flush with the upper surface of the adjusting plate 6012. The first clamping plate 604 and the second clamping plate 605 are used to clamp the pull wire 11 and ensure that it is in the center position. By adjusting the relative lengths of the fixing plate 6011 and the adjusting plate 6012, the height of the end of the pull wire 11 is adapted. By clamping and fixing the end of the pull wire 11 with the first clamping plate 604 and the second clamping plate 605, it can be prevented from swinging randomly and kept in the center, which is convenient for the cam 206 to squeeze and bend.

[0056] like Figure 5 As shown, in this embodiment, preferably, the elastic component includes a first compression spring 606 disposed between the first clamping plate 604 and the adjusting plate 6012;

[0057] A second compression spring 607 is provided between the second clamping plate 605 and the baffle 603, and the second compression spring 607 is exactly the same as the first compression spring 606.

[0058] In the initial state, the first compression spring 606 and the second compression spring 607 are in the natural elongation state, and the first clamping plate 604 and the second clamping plate 605 are in contact with each other and located in the middle of the fixed rod. In use, only the first clamping plate 604 and the second clamping plate 605 need to be separated, and the end of the pull wire 11 is placed between the first clamping plate 604 and the second clamping plate 605, while keeping the end of the pull wire 11 flush with the upper end surface of the first clamping plate 604 and the second clamping plate 605. Since the second compression spring 607 is completely the same in specification as the first compression spring 606, when the pull wire 11 is located between the first clamping plate 604 and the second clamping plate 605, the pressure on the second compression spring 607 is the same as that on the first compression spring 606, so that the pull wire 11 can be kept centered, facilitating the extrusion and bending of the cam 206. It should be noted that during the extrusion and bending of the cam 206 on the pull wire 11, the pull wire 11 may be separated from the first clamping plate 604 and the second clamping plate 605. The positioning and extrusion is suitable for the initial extrusion stage, and the pull wire 11 may be separated from the first clamping plate 604 and the second clamping plate 605 in the subsequent stage. However, since the extrusion in the early stage causes part of the bent area of the pull wire 11 to be located in the groove of the concave wheel 205, the groove of the concave wheel 205 can be relied on for positioning, and the subsequent separation of the pull wire 11 from the first clamping plate 604 and the second clamping plate 605 does not affect the continued extrusion and bending.

[0059] As shown in Figure 5 In this embodiment, in order to conveniently determine the length of the end of the pull wire 11, a first scale line 8 is arranged on the surface of the fixed plate 6011 away from the second movable plate 202, and preferably, the 0 scale line of the first scale line 8 is flush with the upper end surface of the second movable plate 202.

[0060] A second scale line 9 is arranged on one side surface of the adjusting plate 6012 and located on the same side as the first scale line 8. By withdrawing the adjusting plate 6012, the vertical distance between the upper end surface of the adjusting plate 6012 and the concave wheel 205 is the required length of the end of the pull wire 11, that is, the length of the adjusting plate 6012 plus the withdrawn length is the length of the end of the pull wire 11.

[0061] As shown in Figure 6As shown, in order to easily and labor-saving rotate the first force bar 3, the outer side of the first force bar 3 and the second force bar 4 is sleeved with a force arm lengthening pipe 10, the length of the force arm lengthening pipe 10 is determined according to actual situation, the force arm lengthening pipe 10 is in interference fit with the first force bar 3 or the second force bar 4, the force arm lengthening pipe 10 is pulled outwards in use, the force arm is lengthened, the first force bar 3 can be rotated more easily and labor-saving to realize the bending of the pull wire 11, when not in use, the force arm lengthening pipe 10 is pushed inwards to reduce the occupied space, in addition, a layer of silica gel protective sleeve can be arranged at the end of the force arm lengthening pipe 10 away from the connecting seat 1 to avoid the direct contact between the hand and the force arm lengthening pipe 10 and improve the comfort of holding.

[0062] The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A stay making tool comprising a connecting seat (1), characterized in that: The connecting seat (1) is provided with a bending structure (2); The bending structure (2) comprises a first movable plate (201), a second movable plate (202) and a first connecting block (203), one end of the first movable plate (201) and the second movable plate (202) is respectively arranged at both ends of the first connecting block (203) and jointly forms a U-shaped structure; One end of the first movable plate (201) and the second movable plate (202) is rotatably arranged on the connecting seat (1) through a first rotating shaft (204); The first rotating shaft (204) is provided with a concave wheel (205) and is located between the first movable plate (201) and the second movable plate (202); The first movable plate (201) and the second movable plate (202) are provided with a cam (206) matched with the concave wheel (205) through an adjustable spacing structure (5); The first connecting block (203) is provided with a first force bar (3), and the lower part of the connecting seat (1) is provided with a second force bar (4).

2. The stay maker tool of claim 1, wherein: The adjustable spacing structure (5) comprises a third movable plate (501), a fourth movable plate (502) and a second connecting block (503), one end of the third movable plate (501) and the fourth movable plate (502) is respectively arranged at both ends of the second connecting block (503) and jointly forms a U-shaped structure and is located between the first movable plate (201) and the second movable plate (202); The first movable plate (201) and the second movable plate (202) are symmetrically provided with a sliding groove (504), the sliding groove (504) is provided with a second rotating shaft (505), both ends of the second rotating shaft (505) penetrates the third movable plate (501) and the fourth movable plate (502), and the cam (206) is sleeved on the second rotating shaft (505); The center of the first connecting block (203) is provided with a threaded hole, and a screw rod (506) matched with the threaded hole is arranged in the threaded hole; The center of the second connecting block (503) is provided with a circular hole, one end of the screw rod (506) is located in the circular hole and is movably connected with the second connecting block (503), and the other end of the screw rod (506) is connected with one end of the first force bar (3).

3. A stay making tool according to claim 2, wherein: The upper end surface of the second connecting block (503) is provided with a threaded hole which is in communication with the circular hole, and a jam nut (7) matched with the threaded hole is arranged in the threaded hole.

4. A stay making tool according to claim 3, wherein: The second rotating shaft (505) is provided with an auxiliary positioning structure (6); The auxiliary positioning structure (6) comprises a telescopic plate (601), and the telescopic plate (601) comprises a fixed plate (6011) and an adjusting plate (6012); The lower end surface of the adjusting plate (6012) is provided with a second sliding groove (504) matched with the fixed plate (6011), one end of the fixed plate (6011) is located in the second sliding groove (504) and is tightly matched with the second sliding groove (504), and the other end of the fixed plate (6011) is sleeved on one end of the second rotating shaft (505) close to the second movable plate (202). The side of the adjusting plate (6012) facing the second movable plate (202) is provided with a fixed rod (602) with a rectangular cross section and located directly above the cam (206), and the other end of the fixed rod (602) is provided with a baffle (603); The fixed rod (602) is provided with a first clamping plate (604) and a second clamping plate (605) through a symmetrical sleeve provided with an elastic component, the upper end faces of the first clamping plate (604) and the second clamping plate (605) are flush with the upper end face of the adjusting plate (6012), and the first clamping plate (604) and the second clamping plate (605) are used for clamping the pull wire (11) and ensuring that the pull wire (11) is located in the central position.

5. A stay creation tool according to claim 4, wherein: The elastic component includes a first compression spring (606) provided between the first clamping plate (604) and the adjusting plate; The second clamping plate (605) and the baffle (603) are provided with a second compression spring (607) which is completely the same in specification as the first compression spring (606); In the initial state, the first compression spring (606) and the second compression spring (607) are in a natural elongation state, and the first clamping plate (604) and the second clamping plate (605) are in contact with each other.

6. A stay making tool according to claim 5, wherein: The side surface of the fixed plate (6011) away from the second movable plate (202) is provided with a first scale line (8); The side surface of the adjusting plate (6012) is provided with a second scale line (9) and is located on the same side as the first scale line (8).

7. A stay making tool according to claim 6, wherein: The outer side of the first force rod (3) and the second force rod (4) is provided with a force arm lengthening tube (10), and the force arm lengthening tube (10) is in interference fit with the first force rod (3) or the second force rod (4).

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