Pipe thread mounting structure of iron art clamp

Abstract

The utility model belongs to the technical field of pipe installation, and particularly relates to an iron art clamp pipe thread installation structure which comprises an installation hoop piece and a spiral installation mechanism and further comprises an auxiliary clamping mechanism, the auxiliary clamping mechanism comprises a fixing block, the fixing block is fixed on the installation hoop piece, an installation opening is formed in the fixing block, and the spiral installation mechanism is arranged on the installation hoop piece. An inclined guide chute is formed in the inner wall of the mounting opening; the moving block is located in the mounting opening and slides; the guide sliding block is fixed on the moving block and is embedded into the guide sliding groove; the second arc-shaped clamping plate is mounted on the moving block; the reset spring is fixed between the inner wall of the mounting opening and the moving block; according to the pipe fitting clamping device, through the arranged auxiliary clamping mechanism, when the pipe fitting shakes, the second arc-shaped clamping plate can further clamp a pipeline, so that the pipe fitting is prevented from shaking or slipping greatly, and the installation stability of the pipe fitting is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe installation, and in particular relates to a threaded installation structure for an ironwork clamp pipe. Background Art

[0002] A pipeline is a device connected by pipes, pipe connectors and valves for conveying gas, liquid or fluid with solid particles. Usually, the fluid is pressurized by blowers, compressors, pumps and boilers, and then flows from the high-pressure part of the pipeline to the low-pressure part. The fluid can also be transported by its own pressure or gravity. Pipeline mounting brackets are used wherever pipelines are laid.

[0003] At present, the most commonly used method is to use two semicircular clamps to form a clamp to fix and install pipe fittings. It is easy to install, but the stability is insufficient, especially for pipes fixed on the surface of buildings. Since the medium passes through the pipe, it will cause the pipe to shake, causing the semicircular clamp to loosen or even fall off after a period of use.

[0004] Based on the above technical problems, it was retrieved that there are many improved pipe installation brackets in the relevant public patents. For example, in the prior art, the Chinese utility model patent with authorization announcement number CN220540464U discloses a "fixed frame for pipe installation", which includes a frame, an electric hoist is slidably installed on the bottom of the frame, and the bottom of the electric hoist is fixedly connected to the fixed frame, the fixed frame includes a support frame, the top of the support frame is fixedly connected to an arc plate, the bottom of the support frame is connected to a buffer leg, a bandage located above the arc plate is wrapped around the support frame, a locker is installed on the bandage, and a connector slidably installed on the outside of the bandage is provided above the arc plate, which is fixed by the support frame, the arc plate, the bandage and the locker.

[0005] Although the pipe installation brackets in the prior art, including those mentioned above, can improve the stability of the bracket and pipe installation to a certain extent, they only have high stability for horizontal or slightly inclined pipes. When the pipes are vertical or inclined at a large angle, due to the influence of shaking and gravity, a certain relative sliding will occur between the pipes and the bracket. After long-term use, there is still a risk of loosening or even falling.

[0006] In order to solve the above problems, the present application proposes a threaded installation structure for ironwork clamp pipes. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the utility model provides a threaded installation structure for an ironwork clamp pipe, which has the characteristics of being easy to use and having high stability.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a threaded installation structure for ironwork clamp pipes, comprising an installation hoop and a spiral installation mechanism, wherein the spiral installation mechanism is connected to the installation hoop and is used to fix the pipe on the building, and further comprises an auxiliary clamping mechanism, and the auxiliary clamping mechanism comprises:

[0009] A fixing block, wherein the fixing block is fixed on the mounting hoop, and the fixing block is provided with a mounting opening, and an inclined guide slot is provided on the inner wall of the mounting opening;

[0010] A moving block, the moving block is located in the installation opening and slides;

[0011] A guide slide block, the guide slide block is fixed on the moving block and embedded in the guide slide groove;

[0012] A second arc-shaped clamping plate, the second arc-shaped clamping plate is installed on the moving block;

[0013] A return spring is fixed between the inner wall of the mounting opening and the moving block.

[0014] As a preferred technical solution of the utility model, the auxiliary clamping mechanism also includes:

[0015] A No. 2 adjusting screw is installed on the moving block by means of a threaded engagement, and an end of the No. 2 adjusting screw passes through the moving block and is rotatably connected to the No. 2 arc-shaped clamping plate.

[0016] As a preferred technical solution of the utility model, the auxiliary clamping mechanism also includes:

[0017] A No. 2 handle is fixed to an end of the No. 2 adjusting screw rod away from the No. 2 arc-shaped clamping plate.

[0018] As a preferred technical solution of the utility model, the auxiliary clamping mechanism also includes:

[0019] The second anti-skid lining is fixed on the clamping surface of the second arc-shaped clamping plate, and the second anti-skid lining is evenly distributed with second anti-skid convex strips.

[0020] As a preferred technical solution of the utility model, the mounting hoop comprises:

[0021] Semicircular clamps, two of which are symmetrically distributed and hingedly combined;

[0022] A locking bolt, wherein a connecting block is fixed to the free ends of the two semicircular clamps, and the locking bolt passes through the connecting block;

[0023] A No. 1 locking nut is installed on the protruding end of the locking bolt by threaded engagement.

[0024] As a preferred technical solution of the utility model, the spiral installation mechanism includes:

[0025] A fixing plate having a fixing hole;

[0026] A connecting plate, wherein the connecting plate is supported and fixed on the fixing plate by a fixing rod;

[0027] A threaded rod, the threaded rod is fixed on the semicircular clamp and passes through the connecting plate;

[0028] No. 2 locking nuts are distributed on both sides of the connecting plate and are installed on the threaded rod by threaded engagement.

[0029] As a preferred technical solution of the utility model, there are four fixing rods distributed diagonally.

[0030] As a preferred technical solution of the utility model, it also includes an adjustable clamping mechanism, and two symmetrically distributed adjustable clamping mechanisms are provided on the two semicircular clamps, and the adjustable clamping mechanisms include:

[0031] A first arc-shaped clamping plate, the first arc-shaped clamping plate is located on the inner side of the semicircular clamping hoop;

[0032] A No. 1 adjusting screw is installed on the semicircular clamp by threaded engagement, and the end of the No. 1 adjusting screw passes through the semicircular clamp and is rotatably connected to the No. 1 arc clamp.

[0033] As a preferred technical solution of the utility model, the adjustable clamping mechanism also includes:

[0034] A handle No. 1 is fixed to an end of the No. 1 adjusting screw rod away from the No. 1 arc-shaped clamping plate.

[0035] As a preferred technical solution of the utility model, the adjustable clamping mechanism also includes:

[0036] A No. 1 anti-skid lining is fixed on the clamping surface of the No. 1 arc-shaped clamping plate, and a No. 1 anti-skid convex strip is evenly distributed on the No. 1 anti-skid lining.

[0037] Compared with the prior art, the beneficial effects of the utility model are:

[0038] In the utility model, by providing the auxiliary clamping mechanism, when the pipe fitting vibrates, the second arc-shaped clamping plate can further clamp the pipe, thereby preventing the pipe fitting from vibrating or slipping, and ensuring the stability of the pipe fitting installation.

[0039] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0041] Figure 1 It is a schematic diagram of the structure of the utility model;

[0042] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure of the spiral mounting mechanism;

[0043] Figure 3 For this utility model Figure 1 An enlarged structural diagram of the adjustable clamping mechanism;

[0044] Figure 4 It is a schematic diagram of the axonometric structure of the auxiliary clamping mechanism in the utility model.

[0045] In the figure: 1. mounting hoop; 11. semicircular clamp; 12. connecting block; 13. locking bolt; 14. No. 1 locking nut; 2. spiral mounting mechanism; 21. fixing plate; 211. fixing hole; 22. connecting plate; 23. fixing rod; 24. threaded rod; 25. No. 2 locking nut; 3. adjustable clamping mechanism; 31. No. 1 arc splint; 32. No. 1 adjusting screw; 33. No. 1 handle; 34. No. 1 anti-skid lining; 341. No. 1 anti-skid convex strip; 4. auxiliary clamping mechanism; 41. fixing block; 411. mounting port; 412. guide slide; 42. moving block; 421. guide slide; 43. No. 2 arc splint; 44. No. 2 adjusting screw; 45. No. 2 handle; 46. reset spring; 47. No. 2 anti-skid lining; 471. No. 2 anti-skid convex strip. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] See also Figure 1-Figure 4 The utility model provides the following technical solutions: a threaded installation structure for ironwork clamp pipes, comprising an installation hoop 1 and a spiral installation mechanism 2, the spiral installation mechanism 2 is connected to the installation hoop 1, and is used to fix the pipe on the building, and also comprises an auxiliary clamping mechanism 4, and the auxiliary clamping mechanism 4 comprises: a fixed block 41, a moving block 42, a guide slider 421, a second arc-shaped clamping plate 43 and a reset spring 46.

[0048] Further, by Figure 1 and Figure 4 As shown, in this embodiment, the fixed block 41 is fixed on the mounting hoop 1, and the fixed block 41 has a mounting opening 411, and the inner wall of the mounting opening 411 has an inclined guide slot 412, the moving block 42 is located in the mounting opening 411 and slides, the guide slider 421 is fixed on the moving block 42 and embedded in the guide slot 412, the second arc clamping plate 43 is installed on the moving block 42, and the return spring 46 is fixed between the inner wall of the mounting opening 411 and the moving block 42. After adopting the above scheme, when in use, the mounting hoop 1 is used to fix with the pipe fitting, and the spiral mounting mechanism 2 is fixed The pipe fittings are installed on the building, and the second arc-shaped clamping plate 43 is arranged to clamp the pipe fittings inwardly to ensure the stability of the pipe fittings. When idle, the return spring 46 is used to support the moving block 42. When the pipe fittings vibrate, the pipe fittings will drive the moving block 42 to move. When the moving block 42 moves down, it will drive the guide slider 421 to move along the guide slot 412. Since the guide slot 412 is inclined, the moving block 42 will further push the second arc-shaped clamping plate 43 to squeeze the pipe fittings inwardly when it moves down, thereby avoiding large shaking or slipping of the pipe fittings and ensuring the stability of the pipe fittings installation.

[0049] It should be noted that this embodiment is introduced by taking the installation of the pipe in the vertical direction as an example, so that the auxiliary clamping mechanism 4 is fixed only at the lower end of the installation hoop 1. The dead weight of the pipe and the influence of shaking will cause the moving block 42 to move downward. In actual use, the auxiliary clamping mechanism 4 can also be fixed at the upper end of the installation hoop 1.

[0050] It is worth noting that if the pipeline is installed horizontally, it is preferred to fix the auxiliary clamping mechanism 4 at both ends of the installation hoop 1. When the pipeline swings left and right, the moving block 42 will move. The two-way movement can further push the second arc clamp 43 to squeeze the pipe fitting inward, and the stability performance is better.

[0051] Preferably, by Figure 1 and Figure 4 As shown, in this embodiment, the auxiliary clamping mechanism 4 also includes: a No. 2 adjusting screw 44, which is installed on the moving block 42 by threaded engagement, and the end of the No. 2 adjusting screw 44 passes through the moving block 42 and is rotatably connected to the No. 2 arc-shaped clamping plate 43. After adopting the above scheme, when in use, by rotating the No. 2 adjusting screw 44, the initial position of the No. 2 arc-shaped clamping plate 43 can be adjusted by threaded engagement to adapt to pipes of different diameters and ensure that the No. 2 arc-shaped clamping plate 43 can reliably clamp the pipes.

[0052] It should be noted that the No. 2 adjusting screw 44 includes but is not limited to the use of bearings to be rotatably connected to the No. 2 arc-shaped clamping plate 43, and the No. 2 adjusting screw 44 and the No. 2 arc-shaped clamping plate 43 can also be rotatably connected using structures such as a circular groove or a circular slide rail.

[0053] Preferably, by Figure 1 and Figure 4 As shown, in this embodiment, the auxiliary clamping mechanism 4 also includes: a No. 2 handle 45, which is fixed to the end of the No. 2 adjusting screw 44 away from the No. 2 arc-shaped clamping plate 43, and the No. 2 adjusting screw 44 is easily rotated by the provided No. 2 handle 45.

[0054] Preferably, by Figure 1 and Figure 4 As shown, in this embodiment, the auxiliary clamping mechanism 4 also includes: a No. 2 anti-slip lining 47, which is fixed on the clamping surface of the No. 2 arc-shaped clamping plate 43, and has No. 2 anti-slip ridges 471 evenly distributed on the No. 2 anti-slip lining 47. The No. 2 anti-slip lining 47 includes but is not limited to being fixed by adhesive bonding, and can also be fixed by bolts. The No. 2 anti-slip lining 47 preferably uses a rubber component to make the No. 2 anti-slip lining 47 flexible, and cooperates with the No. 2 anti-slip ridges 471 to ensure the stability and safety of the pipe fittings.

[0055] Optionally, by Figure 1As shown, in this embodiment, the mounting hoop 1 includes: a semicircular hoop 11, a locking bolt 13 and a No. 1 locking nut 14. The two semicircular hoop 11 are symmetrically distributed and hingedly combined. A connecting block 12 is fixed to the free ends of the two semicircular hoop 11. The locking bolt 13 passes through the connecting block 12. The No. 1 locking nut 14 is installed on the protruding end of the locking bolt 13 by threaded engagement. After adopting the above scheme, the semicircular hoop 11 is first opened, and the pipe fitting is placed on the inner side of the two semicircular hoop 11, and then the semicircular hoop 11 is closed, so that the locking bolt 13 passes through the connecting block 12, and the No. 1 locking nut 14 is tightened on the protruding end of the locking bolt 13, and the semicircular hoop 11 can be used to fix the pipe fitting.

[0056] It should be noted that in other available embodiments, both ends of the two semicircular hoops 11 can also be closed by using locking bolts 13 and No. 1 locking nuts 14.

[0057] Optionally, by Figure 1 and Figure 2 As shown, in this embodiment, the spiral installation mechanism 2 includes: a fixing plate 21, a connecting plate 22, a threaded rod 24 and a No. 2 locking nut 25. A fixing hole 211 is provided on the fixing plate 21. The connecting plate 22 is supported and fixed on the fixing plate 21 by the fixing rod 23. The threaded rod 24 is fixed on the semicircular clamp 11 and passes through the connecting plate 22. No. 2 locking nuts 25 installed on the threaded rod 24 by threaded engagement are distributed on both sides of the connecting plate 22. After adopting the above scheme, the fixing plate 21 is fixed to the building through the fixing hole 211 and conventional means. The semicircular clamp 11 is connected to the fixing plate 21 through the threaded rod 24 and the No. 2 locking nut 25. It is easy to install and has high stability.

[0058] It should be noted that, by adopting the above solution, after loosening the No. 2 locking nut 25, the semicircular clamp 11 can be rotated around the threaded rod 24 as the axis, and the angle of the semicircular clamp 11 can be adjusted to meet different installation requirements.

[0059] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, four fixing rods 23 are distributed diagonally, which improves the stability of the connecting plate 22 and thus improves the installation stability of the semicircular clamp 11.

[0060] Preferably, by Figure 1 and Figure 3As shown, in this embodiment, an adjustable clamping mechanism 3 is also included. Two symmetrically distributed adjustable clamping mechanisms 3 are provided on the two semicircular clamps 11, and the adjustable clamping mechanism 3 includes: a No. 1 arc-shaped clamping plate 31 and a No. 1 adjusting screw 32. The No. 1 arc-shaped clamping plate 31 is located on the inner side of the semicircular clamp 11, and the No. 1 adjusting screw 32 is installed on the semicircular clamp 11 by threaded engagement. The end of the No. 1 adjusting screw 32 passes through the semicircular clamp 11 and is rotatably connected to the No. 1 arc-shaped clamping plate 31. After adopting the above scheme, when in use, by rotating the No. 1 adjusting screw 32, the initial position of the No. 1 arc-shaped clamping plate 31 can be adjusted by threaded engagement to adapt to pipes of different diameters, and ensure that the No. 1 arc-shaped clamping plate 31 can reliably clamp the pipes.

[0061] It should be noted that the No. 1 adjusting screw 32 includes but is not limited to being rotatably connected to the No. 1 arc-shaped clamping plate 31 using a bearing, and may also use a structure such as a circular groove or a circular slide rail to realize the rotatable connection between the No. 1 adjusting screw 32 and the No. 1 arc-shaped clamping plate 31.

[0062] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, the adjustable clamping mechanism 3 also includes: a No. 1 handle 33, which is fixed to the end of the No. 1 adjusting screw 32 away from the No. 1 arc-shaped clamping plate 31, and the No. 1 adjusting screw 32 is easily rotated by the setting of the No. 1 handle 33.

[0063] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, the adjustable clamping mechanism 3 also includes: a No. 1 anti-slip lining 34, the No. 1 anti-slip lining 34 is fixed on the clamping surface of the No. 1 arc-shaped clamping plate 31, and a No. 1 anti-slip ridge 341 is evenly distributed on the No. 1 anti-slip lining 34, the No. 1 anti-slip lining 34 includes but is not limited to being fixed by adhesive bonding, and can also be fixed by bolts. The No. 1 anti-slip lining 34 preferably adopts a rubber component to make the No. 1 anti-slip lining 34 flexible, and cooperates with the No. 1 anti-slip ridge 341 to further ensure the stability and safety of the pipe fittings.

[0064] Components not described in detail herein are prior art.

[0065] Working principle and use process of the utility model: The installation structure of the utility model adopts a combination of an installation hoop 1 and a spiral installation mechanism 2 to install the pipe fitting. When in use, firstly use conventional means to fix the fixing plate 21 on the building, open the semicircular clamp 11, place the pipe fitting inside the two semicircular clamps 11, and then close the semicircular clamp 11, so that the locking bolt 13 passes through the connecting block 12, and tighten the No. 1 locking nut 14 on the protruding end of the locking bolt 13, and then the semicircular clamp 11 can be used to fix the pipe fitting;

[0066] The first adjusting screw 32 is rotated so that the first adjusting screw 32 pushes the first arc clamping plate 31 to move under the action of the screw thread, and the first arc clamping plate 31 is used to clamp the pipe fitting;

[0067] The second adjusting screw 44 is rotated so that the second adjusting screw 44 pushes the second arc clamping plate 43 to move under the action of the screw thread, and the second arc clamping plate 43 is used to clamp the pipe fitting;

[0068] When idle, the return spring 46 is used to support the moving block 42. When the pipe shakes, the pipe will drive the moving block 42 to move, and the moving block 42 will drive the guide slider 421 to move along the guide slot 412. Since the guide slot 412 is inclined, the moving block 42 will further push the second arc clamping plate 43 to squeeze the pipe inward when moving, thereby avoiding the pipe from shaking or slipping, and ensuring the stability of the pipe installation.

[0069] The installation structure of the utility model is applicable to the installation of pipes in different angles and directions.

[0070] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A threaded installation structure for ironwork fixture pipes, comprising a mounting hoop (1) and a spiral installation mechanism (2), wherein the spiral installation mechanism (2) is connected to the mounting hoop (1) and is used to fix the pipe on a building, characterized in that: It also includes an auxiliary clamping mechanism (4), and the auxiliary clamping mechanism (4) includes: A fixing block (41), the fixing block (41) being fixed on the mounting hoop (1), and having a mounting opening (411) on the fixing block (41), and having an inclined guide slot (412) on the inner wall of the mounting opening (411); A moving block (42), the moving block (42) being located in the installation opening (411) and sliding; A guide slider (421), wherein the guide slider (421) is fixed on the moving block (42) and embedded in the guide slot (412); A second arc-shaped clamping plate (43), wherein the second arc-shaped clamping plate (43) is mounted on the moving block (42); A return spring (46), wherein the return spring (46) is fixed between the inner wall of the installation opening (411) and the moving block (42).

2. The threaded installation structure for ironwork fixture pipe according to claim 1, characterized in that: The auxiliary clamping mechanism (4) further comprises: A No. 2 adjusting screw (44), wherein the No. 2 adjusting screw (44) is installed on the moving block (42) by means of a threaded engagement, and an end of the No. 2 adjusting screw (44) passes through the moving block (42) and is rotatably connected to the No. 2 arc-shaped clamping plate (43).

3. The threaded installation structure for ironwork fixture pipe according to claim 2, characterized in that: The auxiliary clamping mechanism (4) further comprises: A No. 2 handle (45), the No. 2 handle (45) is fixed to an end of the No. 2 adjusting screw (44) away from the No. 2 arc-shaped clamping plate (43).

4. The threaded installation structure for ironwork fixture pipe according to claim 1, characterized in that: The auxiliary clamping mechanism (4) further comprises: The second anti-skid lining (47) is fixed on the clamping surface of the second arc-shaped clamping plate (43), and the second anti-skid convex strips (471) are evenly distributed on the second anti-skid lining (47).

5. The threaded installation structure for ironwork fixture pipe according to claim 1, characterized in that: The mounting hoop (1) comprises: A semicircular clamp (11), wherein two semicircular clamps (11) are symmetrically distributed and hingedly combined; A locking bolt (13), a connecting block (12) is fixed to the free ends of the two semicircular clamps (11), and the locking bolt (13) passes through the connecting block (12); A No. 1 locking nut (14), the No. 1 locking nut (14) being installed on the protruding end of the locking bolt (13) by means of threaded engagement.

6. The ironwork fixture pipe thread installation structure according to claim 5, characterized in that: The spiral mounting mechanism (2) comprises: A fixing plate (21), wherein the fixing plate (21) has a fixing hole (211); A connecting plate (22), wherein the connecting plate (22) is supported and fixed on the fixing plate (21) by a fixing rod (23); A threaded rod (24), wherein the threaded rod (24) is fixed on the semicircular clamp (11) and passes through the connecting plate (22); No. 2 locking nuts (25), which are installed on the threaded rods (24) by means of threaded engagement, are distributed on both sides of the connecting plate (22).

7. The ironwork fixture pipe thread installation structure according to claim 6, characterized in that: There are four fixing rods (23) distributed diagonally.

8. The threaded installation structure for ironwork fixture pipe according to claim 5, characterized in that: It also includes an adjustable clamping mechanism (3), wherein two symmetrically distributed adjustable clamping mechanisms (3) are provided on each of the two semicircular clamps (11), and the adjustable clamping mechanism (3) includes: A first arc-shaped clamping plate (31), the first arc-shaped clamping plate (31) being located on the inner side of the semicircular clamping hoop (11); A No. 1 adjusting screw (32), wherein the No. 1 adjusting screw (32) is installed on the semicircular clamp (11) by screwing, and the end of the No. 1 adjusting screw (32) passes through the semicircular clamp (11) and is rotatably connected to the No. 1 arc clamp (31).

9. The ironwork fixture pipe thread installation structure according to claim 8, characterized in that: The adjustable clamping mechanism (3) further comprises: A handle (33) is fixed to an end of the adjusting screw (32) away from the arc-shaped clamping plate (31).

10. The ironwork fixture pipe thread installation structure according to claim 8, characterized in that: The adjustable clamping mechanism (3) further comprises: A number one anti-skid lining (34), the number one anti-skid lining (34) is fixed on the clamping surface of the number one arc-shaped clamping plate (31), and number one anti-skid convex strips (341) are evenly distributed on the number one anti-skid lining (34).

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