O-shaped fire safety hook

Abstract

The utility model discloses an O-shaped fire safety hook which is characterized in that a connecting section of a C-shaped main hook body is connected with a movable rod through a pin shaft, the movable rod is matched with an internal thread sleeve through a second thread, and one end, far away from the connecting section, of the C-shaped main hook body is provided with a first thread connected with the second thread so as to be matched with the internal thread sleeve; when the internal thread sleeve is matched with the first thread and the second thread at the same time, the internal thread sleeve does not shake, the stability of the internal thread sleeve is guaranteed, and therefore the internal thread sleeve is prevented from being separated from the C-shaped main hook body, and safety is improved; a first rod body of the positioning rod is matched with a first positioning groove and a first arc-shaped extension channel of the C-shaped main hook body, and a second rod body of the positioning rod is matched with a second positioning groove and a second arc-shaped extension channel of the C-shaped main hook body, so that positioning is realized; and the stability of the movable rod is further improved through the stepped positioning rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire safety hook technical field, concretely is a kind of O-shaped fire safety hook. BACKGROUND

[0002] Safety hook, also called "main lock", is the most commonly used connecting tool to connect rope, flat band and anchor point, equipment, etc., O-shaped safety hook is widely used in the field of fire protection, as its name implies, it is similar to "O" shape. The traditional O-shaped safety hook generally has no limit between the movable rod and the C-shaped main hook body, which leads to difficult alignment, increases the operation difficulty and increases the lock time. At present, some O-shaped safety hooks also use straight rod type positioning structure. When this positioning structure is used for a long time and the pin shaft is loose, the movable rod will also be loose when locking, especially for the structure in which the internal thread sleeve is only connected with the movable rod by thread, thus having certain safety hazards. Therefore, an improved technology is urgently needed to solve the problem existing in the prior art. SUMMARY

[0003] The utility model discloses a kind of O-shaped fire safety hook, when internal thread sleeve is cooperated with first thread and second thread simultaneously, internal thread sleeve cannot shake, guarantee the stability of internal thread sleeve, to avoid internal thread sleeve from C-shaped main hook body, improve security, when internal thread sleeve is connected with the first thread of C-shaped main hook body, the stability of movable rod is further improved by stepped positioning rod, to solve the problem proposed in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of O-shaped fire safety hook, including C-shaped main hook body, movable rod and internal thread sleeve, the lower part one end of the C-shaped main hook body is provided with connecting section, the outer surface of the upper part one end of the C-shaped main hook body is equipped with first thread, the C-shaped main hook body is located first thread one end and is equipped with positioning slot, the recess of the movable rod one end is inserted with the connecting section of the lower part of the C-shaped main hook body and is connected with connecting section rotationally by pin shaft, the outer surface of the movable rod other end is equipped with second thread, the second thread is mutually linked with first thread, the internal thread sleeve is set in movable rod and is thread cooperated with second thread, the internal thread sleeve is also thread cooperated with first thread, the end of the movable rod is also provided with positioning rod in second thread one end;

[0005] The positioning rod includes first rod body and second rod body, the first rod body one end is connected with movable rod, the first rod body is provided with second rod body away from movable rod one end, the outer diameter of the second rod body is greater than the outer diameter of the first rod body;

[0006] The positioning slot comprises a first positioning slot, a second positioning slot, a first arc-shaped extension channel and a second arc-shaped extension channel, the first positioning slot and the second positioning slot are coaxially arranged and are in communication with each other, the first positioning slot is provided with the first arc-shaped extension channel at one end close to the inner side of the C-shaped main hook body, the second positioning slot is provided with the second arc-shaped extension channel at one end close to the inner side of the C-shaped main hook body, the first arc-shaped extension channel and the second arc-shaped extension channel are in communication with each other and are in communication with the outside of the C-shaped main hook body, the cross section of the first positioning slot and the first arc-shaped extension channel is consistent and matches the first rod body, and the cross section of the second positioning slot and the second arc-shaped extension channel is consistent and matches the second rod body.

[0007] Preferably, the O-shaped fire safety hook further comprises a hexagonal hole formed in the second rod body away from the first rod body.

[0008] Preferably, the O-shaped fire safety hook further comprises a threaded column arranged on the first rod body away from the second rod body, a screw hole formed in the movable rod away from the connecting segment, and a positioning rod fastened to the movable rod through the threaded column.

[0009] Preferably, the O-shaped fire safety hook further comprises anti-skid lines arranged on the outer surface of the internally-threaded sleeve.

[0010] Compared with the prior art, the O-shaped fire safety hook has the following beneficial effects:

[0011] (1) The connecting segment of the C-shaped main hook body is connected with the movable rod through the pin shaft, the movable rod is matched with the internally-threaded sleeve through the second thread, the C-shaped main hook body is provided with the first thread matched with the second thread at one end away from the connecting segment, and the internally-threaded sleeve will not shake when matched with the first thread and the second thread, so that the stability of the internally-threaded sleeve is ensured, and the internally-threaded sleeve is prevented from being separated from the C-shaped main hook body, thereby improving the safety.

[0012] (2) The movable rod is provided with the positioning rod at one end away from the connecting segment, the first rod body of the positioning rod is matched with the first positioning slot and the first arc-shaped extension channel of the C-shaped main hook body, the second rod body is matched with the second positioning slot and the second arc-shaped extension channel of the C-shaped main hook body, so that the positioning is realized, and the stability of the movable rod is further improved through the stepped positioning rod when the internally-threaded sleeve is connected with the first thread of the C-shaped main hook body. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The figure is a structural schematic view of the O-shaped fire safety hook;

[0014] Figure 2 The figure is a structural schematic view of the O-shaped fire safety hook (without showing the internally-threaded sleeve);

[0015] Figure 3 This is a schematic diagram of the positioning rod structure;

[0016] Figure 4 This is a schematic diagram of the positioning slot structure;

[0017] Figure 5 For the appendix Figure 4 A schematic diagram of the structure viewed from below.

[0018] In the diagram: C-shaped main hook body 1, movable rod 2, internal threaded sleeve 3, connecting section 4, first thread 5, positioning slot 6, second thread 7, positioning rod 8, first positioning groove 601, second positioning groove 602, first arc-shaped extension channel 603, second arc-shaped extension channel 604, first rod body 801, second rod body 802, internal hexagonal hole 803, threaded post 804. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Please see Figures 1-2This utility model provides a technical solution: an O-shaped fire safety hook, including a C-shaped main hook body 1, a movable rod 2, and an internally threaded sleeve 3. A connecting section 4 is provided at the lower end of the C-shaped main hook body 1, and a first thread 5 is provided on the outer surface of the upper end of the C-shaped main hook body 1. A positioning groove 6 is provided at the end of the C-shaped main hook body 1 located at the first thread 5. A groove is provided at one end of the movable rod 2. The groove at one end of the movable rod 2 is inserted and engaged with the connecting section 4 at the lower part of the C-shaped main hook body 1 and is rotatably connected to the connecting section 4 via a pin shaft. A second thread 7 is provided on the outer surface of the other end of the movable rod 2. The second thread 7 is connected to the first thread 5. The internally threaded sleeve 3 is sleeved on the movable rod 2 and threadedly engaged with the second thread 7. The internally threaded sleeve 3 is also threadedly engaged with the first thread 5. The outer surface of the internally threaded sleeve 3 is provided with anti-slip texture to increase friction so that the internally threaded sleeve 3 can be rotated directly by fingers. A positioning rod 8 is also provided at the end of the movable rod 2 located at the end of the second thread 7.

[0022] like Figure 3 As shown, the positioning rod 8 includes a first rod body 801 and a second rod body 802. One end of the first rod body 801 is connected to the movable rod 2, and the second rod body 802 is provided at the end of the first rod body 801 away from the movable rod 2. The outer diameter of the second rod body 802 is larger than the outer diameter of the first rod body 801, so that the positioning rod 8 has a stepped structure, which makes the movable rod 2 have better stability in the axial direction.

[0023] like Figures 4-5 As shown, the positioning slot 6 includes a first positioning slot 601, a second positioning slot 602, a first arc-shaped extension channel 603, and a second arc-shaped extension channel 604. The first positioning slot 601 and the second positioning slot 602 are coaxially arranged and interconnected. The first positioning slot 601 extends into the first arc-shaped extension channel 603 at one end near the inner side of the C-shaped main hook body 1, and the second positioning slot 602 extends into the second arc-shaped extension channel 604 at one end near the inner side of the C-shaped main hook body 1. The first arc-shaped extension channel 603 and the second arc-shaped extension channel 604 are interconnected and both communicate with the outside of the C-shaped main hook body 1. The first positioning slot 601 and the first arc-shaped extension channel 604... The cross section of rod 3 is consistent with that of the first rod 801. The cross sections of the second positioning groove 602 and the second arc-shaped extension channel 604 are consistent with that of the second rod 802. The second rod 802 has an internal hexagonal hole 803 at the end away from the first rod 801 so that the positioning rod 8 can be rotated by a hexagonal wrench, thereby facilitating the installation and disassembly of the positioning rod 8. The first rod 801 has a threaded post 804 at the end away from the second rod 802. The movable rod 2 has a screw hole at the end away from the connecting section 4. The positioning rod 8 is fastened to the movable rod 2 through the threaded post 804. The isomorphic threaded post 804 is connected to the movable rod 2 to realize the installation and disassembly of the positioning rod 8.

[0024] The installation method and use principle are as follows: firstly, a groove is formed at one end of the steel pipe, and a thread is formed at the end close to the groove; the other end is pressed to obtain the connecting section 4; then the thread part of the steel pipe is cut to obtain the initial straight rod of the C-shaped main hook body 1 and the initial movable rod 2; then the positioning clamping groove 6 is formed at the corresponding end of the initial straight rod of the C-shaped main hook body 1 through a machine tool; then the initial straight rod of the C-shaped main hook body 1 is bent to obtain the C-shaped main hook body 1; the thread part of the C-shaped main hook body 1 is the first thread 5; the thread part of the movable rod 2 is the second thread 7; then a screw hole is formed at the end of the movable rod 2 away from the groove; the prefabricated positioning rod 8 is tightly connected with the screw hole of the movable rod 2 through a screw rod; finally, the groove of the movable rod 2 is movably connected with the connecting section 4 of the C-shaped main hook body 1 through a pin shaft; the assembly is completed; before use, the internal thread sleeve 3 is connected with the second thread 7 of the movable rod 2 to complete the assembly. When in use, the movable rod 2 is rotated around the pin shaft, and the positioning rod 8 is slidably positioned in the positioning clamping groove 6; specifically, the first rod body 801 reaches the first positioning groove 601 through the first arc-shaped extension passage 603, and the second rod body 802 reaches the second positioning groove 602 through the second arc-shaped extension passage 604; then the internal thread sleeve 3 is rotated to cooperate with the first thread 5 of the C-shaped main hook body 1, and the closing of the O-shaped safety hook is completed. The utility model has the advantages of reasonable structure, the connecting section 4 of the C-shaped main hook body 1 is connected with the movable rod 2 through a pin shaft, the movable rod 2 cooperates with the internal thread sleeve 3 through the second thread 7, the C-shaped main hook body 1 is provided with the first thread 5 connected with the second thread 7 at the end away from the connecting section 4 to cooperate with the internal thread sleeve 3, when the internal thread sleeve 3 cooperates with the first thread 5 and the second thread 7 at the same time, the internal thread sleeve 3 will not shake, the stability of the internal thread sleeve 3 is guaranteed, the internal thread sleeve 3 is prevented from being separated from the C-shaped main hook body 1, and the safety is improved; in addition, the movable rod 2 is provided with the positioning rod 8 at the end away from the connecting section 4; the first rod body 801 of the positioning rod 8 cooperates with the first positioning groove 601 and the first arc-shaped extension passage 603 of the C-shaped main hook body 1; the second rod body 802 cooperates with the second positioning groove 602 and the second arc-shaped extension passage 604 of the C-shaped main hook body 1; therefore, the positioning is realized; and when the internal thread sleeve 3 is connected with the first thread 5 of the C-shaped main hook body 1, the stability of the movable rod 2 is further improved through the stepped positioning rod 8.

[0025] The parts not described in the utility model are the known technology of the person skilled in the art.

[0026] Finally, it should be pointed out that the above specific embodiments are only used to illustrate the technical scheme of the utility model and not to limit it; although the utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical scheme of the utility model can be modified and replaced equivalently without departing from the spirit and range of the technical scheme of the utility model, and they should all be covered in the claim range of the utility model.

Claims

1. An O-shaped fire safety hook, characterized by: The utility model provides a hook, including C main hook body (1), movable rod (2) and internal thread sleeve (3), one end of lower part of C main hook body (1) is provided with connecting section (4), the outer surface of one end of upper part of C main hook body (1) is seted up with first thread (5), and C main hook body (1) is seted up with positioning slot (6) at one end of first thread (5), one end of movable rod (2) is seted up with recess, and the recess of one end of movable rod (2) is inserted with connecting section (4) of lower part of C main hook body (1) and is connected with connecting section (4) rotationally through pin, the outer surface of other end of movable rod (2) is seted up with second thread (7), and second thread (7) and first thread (5) are connected with each other, and internal thread sleeve (3) is seted up with movable rod (2) and is connected with second thread (7) threadedly, and internal thread sleeve (3) is also connected with first thread (5) threadedly, and the end of movable rod (2) at one end of second thread (7) is also provided with positioning rod (8). The positioning rod (8) includes a first rod body (801) and a second rod body (802), one end of the first rod body (801) is connected with the movable rod (2), the second rod body (802) is arranged at the end of the first rod body (801) away from the movable rod (2), and the outer diameter of the second rod body (802) is greater than that of the first rod body (801). The positioning slot (6) includes a first positioning slot (601), a second positioning slot (602), a first arc-shaped extension channel (603), and a second arc-shaped extension channel (604), the first positioning slot (601) and the second positioning slot (602) are coaxially arranged and communicate with each other, the first positioning slot (601) is extended to form the first arc-shaped extension channel (603) at one end close to the inner side of the C main hook body (1), the second positioning slot (602) is extended to form the second arc-shaped extension channel (604) at one end close to the inner side of the C main hook body (1), the first arc-shaped extension channel (603) and the second arc-shaped extension channel (604) communicate with each other and with the outside of the C main hook body (1), the cross section of the first positioning slot (601) and the first arc-shaped extension channel (603) is consistent and matched with the first rod body (801), and the cross section of the second positioning slot (602) and the second arc-shaped extension channel (604) is consistent and matched with the second rod body (802).

2. An O-shaped fire safety hook according to claim 1, characterized in that: The second rod body (802) is provided with an internal hexagonal hole (803) at the end away from the first rod body (801).

3. An O-shaped fire safety hook according to claim 1, characterized in that: The first rod body (801) is provided with a threaded column (804) at the end away from the second rod body (802), the movable rod (2) is provided with a threaded hole at the end away from the connecting section (4), and the positioning rod (8) is fastened to the movable rod (2) through the threaded column (804).

4. An O-shaped fire safety hook according to claim 1, characterized in that: The outer surface of the internal thread sleeve (3) is provided with anti-skid lines.

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