JP2022186146A - Intermediate fixing metal fitting unit - Google Patents

Abstract

To provide an intermediate fixing metal fitting unit for holding an intermediate part of a safety wire which guides a safety unit which is attached to a worker in high place work.SOLUTION: An intermediate fixing metal fitting unit 1 comprises: at least one pair of intermediate fixing metal fittings 2 comprising, a wire holding part 3 for holding a safety wire 50 for guiding a safety unit which prevents falling of a worker, and a lock structure 7 for switching an opening/closing of the wire holding part 3, the intermediate fixing metal fittings arranged on the safety wire 50; a fixing member 5 for fixing the respective intermediate fixing metal fittings 2 to a structure being an installation object thereof; and a key 6 which is provided separately from the intermediate fixing metal fittings 2, shared in all of the lock structures 7, and releases the lock structure 7 for making the wire holding part 3 into an open state.SELECTED DRAWING: Figure 1

Description

The present invention relates to an intermediate fixture unit for holding an intermediate portion of a safety wire that guides a safety device used by a worker during high-place work on a structure such as a steel tower.

First, the situation during high-place work on a steel tower or the like will be described with reference to FIGS. 12 and 13. FIG.
FIG. 12 is a side view of a pylon equipped with safety wires, and FIG. 13 is a side view showing how the pylon is being worked.
As shown in FIG. 12, a steel safety wire 50 that is used by a worker 57 (see FIG. 13) to move up and down is permanently installed on a steel tower 51 that supports power lines and the like.
In addition, when the worker 57 works on the steel tower 51, the safety belt 56 (safety belt) is worn around the waist, and the hook 58 provided on the safety device 54 (so-called “Rolip: registered trademark”) is attached to the safety belt 56. , and a safety device 54 is slidably engaged with the safety wire 50 to prevent the worker 57 from falling.
In general, cutout 54 is connected to safety harness 56 via band 55 . Therefore, even if the worker 57 accidentally falls while working at height, a fall accident can be prevented by activating the lock mechanism provided in the safety device 54 via the band 55 .
More specifically, when the worker 57 moves toward the upper side of the steel tower 51, the safety device 54 is pulled upward via the band 55 as the worker 57 moves, so that the safety wire 50 is lifted. The cutout 54 slides.
On the other hand, when the worker 57 moves toward the lower side of the steel tower 51 , the worker 57 moves by suspending the safety device 54 via the band 55 .
The safety device 54 normally has a wedge-shaped claw inside it. When the worker 57 moves on the safety wire 50, the weight of the worker 57 is not applied to the safety device 54, and the safety device 54 hangs from the safety wire 50 only by its own weight. , the claw built in the safety device 54 slides on the safety wire 50 together with the safety device 54 without being pushed into the safety wire 50 .
On the other hand, when the worker 57 is unintentionally suspended from the safety device 54 via the band 55 while the worker 57 is moving toward the lower side of the steel tower 51, the The above-mentioned claws are pushed into the safety wire 50 to fix the safety device 54 on the safety wire 50 . That is, the safety device 54 is locked, and the safety device 54 stops sliding on the safety wire 50 . As a result, the fall accident of the worker 57 can be prevented. The locked state of the safety device 54 can be released by the operator 57's operation.

In general, as shown in FIG. 12, the safety wire 50 provided on the steel tower 51 has a length of several tens of meters, and has an intermediate support metal fitting 52 to prevent damage or disconnection due to wind vibration or the like. held by It should be noted that when the worker 57 passes through the place where the intermediate support fitting 52 is installed on the safety wire 50 , the worker 57 does not need to remove the safety device 54 from the safety wire 50 .
On the other hand, in the installation area of the safety wire 50, at a location where the safety wire 50 needs to be bent, that is, at a “bending point” (bent point) of the safety wire 50, when the worker 57 passes through The safety wire 50 is held by an intermediate fixture (not shown) that requires the cutout 54 to be removed from the safety wire 50 .
12 and intermediate fixing metal fittings (not shown) installed at the above-described "bending points" are installed on a structure such as a steel tower 51 by means of fixing members 53. As shown in FIG.
At the "bending point" where the intermediate fixing metal fitting is installed in the safety wire 50, the intermediate fixing metal fitting becomes an obstacle and the cutout 54 cannot be slid on the safety wire 50. - 特許庁Therefore, when the steel tower 51 is lifted or lowered, the worker 57 has to remove the safety device 54 from the safety wire 50 once to avoid the intermediate fixture, and then attach the safety device 54 to the safety wire 50 again.
In this case, when the safety device 54 is removed from the safety wire 50, the worker 57 may fall, which is extremely dangerous.
In view of such circumstances, a prior application has been known which relates to an intermediate fixing metal fitting that allows the safety wire 50 to be released as necessary to allow the cutout 54 to pass through without being removed from the safety wire 50 .

In Patent Document 1, a guard wire attached along the main pillar is attached under the name of "fixing metal fitting for bending part of guard wire of pylon" so that a worker who climbs up and down the pylon locks the lifeline. Disclosed is an invention related to a metal fitting for fixing a bent portion of a guard wire of a steel tower, which is fixed while maintaining an appropriate distance from a main pole at a bent portion that changes from a steeply inclined state to an almost upright state at the top.
The bending part fixing bracket of the guard wire of the steel tower disclosed in Patent Document 1 is explained by using the reference numerals described in FIGS. 1 to 4 in the same document as it is. In the bending part fixing bracket (4) for fixing the guard wire (3) at the bending part that changes from the state to the almost upright position, the longitudinal connection to the outside of the leg member (5) fixed to the bending part of the main column (2) The member (6) is attached, and metal fitting bodies (7, 7) are installed at the upper and lower ends of the connecting member (6) to clamp the guard wire (3). The members (8, 8) are pivotally supported at one end thereof so as to be openable and closable, and a hole (9) is formed in the other end of one clamping member (8) and the corresponding end of the other clamping member (8). A lock lever (10) is rotatably provided to be inserted into the hole (9), and a locking piece (11) which cannot be detached from the hole (9) by its rotation is provided at the tip of the lock lever (10). , and a head (12) for turning the lock lever (10) is provided at the proximal end of the lock lever (10).
The invention disclosed in Patent Document 1 has a pair of metal fitting bodies (7) that hold the guard wire (3), so that one metal fitting body is pulled in an attempt to slide the safety device along the guard wire (3). Even when opened, the guard wire (3) is firmly held by the other fitting body (7).
For this reason, even when the guard wire (3) is slid over the guard wire (3) at the installation position of the bending portion fixing bracket disclosed in Patent Document 1, the guard wire (3) may swing due to wind or the like. There is no

JP-A-4-124386

In the case of the invention disclosed in Patent Document 1, opening and closing of the fitting body (7) holding the guard wire (3) is performed by operating the lever (22).
Therefore, in the invention disclosed in Patent Document 1, both the pair of metal fitting bodies (7, 7) can be kept open due to its structure.
In other words, in the invention disclosed in Patent Document 1, when both the pair of metal fitting bodies (7, 7) are opened due to an unintentional erroneous operation by the operator, the guard wire (3) is connected to the pair of metal fitting bodies ( In any of 7), there is a concern that a problem such as being unable to be held may occur.
In this case, the invention disclosed in Patent Literature 1 cannot exhibit the intended functions and effects.

The present invention has been made in response to such a conventional situation, and its object is to hold the safety wire by the intermediate fixing metal fitting and to pass the cutout to the installation position of the intermediate fixing metal fitting. To provide an intermediate fixing fitting unit which eliminates the need to remove a safety device from a safety wire and can always hold the safety wire by the intermediate fixing fitting.

A first invention for solving the above-mentioned problems is an intermediate fixing bracket unit for holding an intermediate portion of a safety wire that guides a safety device that prevents a worker from falling, the intermediate fixing bracket unit consists of at least one pair of intermediate fixing metal fittings provided on the safety wire, fixing members for fixing each intermediate fixing metal fitting to the structure to be installed, and all locks provided separately from the intermediate fixing metal fittings. a key that is shared with the structure and unlocks the lock structure to open the wire holding part; and a lock structure for switching states.
In the first aspect of the invention configured as described above, the intermediate fixing fitting has a function of holding a desired intermediate position of the safety wire to retain the safety wire. Furthermore, the fixing member has the function of fixing each intermediate fixing metal fitting to the structure to which it is to be installed.
In addition, the wire holding portion of the intermediate fixing fitting has the function of sandwiching and holding the safety wire and releasing the safety wire from the held state (locked state) as necessary. In addition, the locking structure of the intermediate fixture has the effect that the closed state of the wire holding portion can be switched to the open state only by an operation using a key.
Further, in the first invention, the key is used to unlock all the lock structures of at least one pair of intermediate fixing fittings. This means that if one worker uses only one key during work, when one of the pair of intermediate fixing metal fittings is opened, the other intermediate fixing metal fitting can be opened. means that you cannot Therefore, in the first invention, both of the paired intermediate fixing fittings cannot be opened at the same time.

The second aspect of the present invention is an intermediate fixture unit according to the first aspect, wherein the wire holding portion comprises a pair of clamping arms that clamp the safety wire and a side of the pair of clamping arms that does not clamp the safety wire. a pivot shaft that rotatably connects the ends of the pair of clamping arms, and the lock structure includes an elastic member that biases the ends of the pair of clamping arms that clamp the safety wire to an open state; and a ratchet mechanism for restricting the pivoting motion of the holding arms trying to open the holding arms, and releasing the ratchet mechanism with a key to open the pair of holding arms from the closed state. and
In the second invention configured as described above, the pair of clamping arms has a function of clamping and holding the safety wire. In addition, the rotating shaft has the function of rotatably connecting the ends of the pair of clamping arms that do not clamp the safety wire.
Furthermore, the elastic member in the lock structure has a function of urging the ends of the pair of clamping arms on the side that clamps the safety wire to open. In addition, the ratchet mechanism has the effect of regulating the pivoting motion to open the pair of clamping arms and maintaining the closing rotation of the pair of clamping arms step by step.
Also, the key has the effect of releasing the ratchet mechanism to open the pair of clamping arms.
Therefore, in the second invention, when an external force is applied to the pair of clamping arms in the open state to rotate them so as to close them, the closed state is maintained by the ratchet mechanism. Furthermore, when the pair of clamping arms are completely closed, the closed state is maintained. In this case, the pair of clamping arms are locked.
Thus, in the second invention, there is no need to perform a special operation (such as a locking operation using a key) in order to completely close the pair of clamping arms and lock the state.

A third aspect of the present invention is an intermediate fixture unit according to the second aspect of the present invention, in which the ends of the pair of clamping arms that clamp the safety wire are provided with a belt extending between the ends. It is characterized by
The third invention configured as described above has the same effect as the above-described second invention. Furthermore, in the third invention having the above configuration, the pair of clamping arms can be operated to close by pressing the belt toward the rotating shaft side of the wire holding portion using the safety wire.

A ground terminal operation unit according to a fourth aspect of the invention is the above-described first aspect of the invention, wherein the lock structure is a motor drive mechanism built into the intermediate fixing bracket, and the intermediate fixing bracket has a hole into which a key can be inserted. A switch for operating the motor driving mechanism is provided in the hole, and the wire holding portion is opened by inserting a key into the hole and operating the switch.
The fourth invention configured as described above has the same effects as those of the first invention described above. Furthermore, in the fourth invention having the above configuration, the motor drive mechanism has a configuration corresponding to the elastic member and the ratchet mechanism in the above-described second invention. Further, the motor driving mechanism has an action of opening or closing the wire holding portion by operating the switch. Also, the switch has the action of being operated by the key to operate the motor drive mechanism.
Furthermore, in the fourth invention, the switch is formed in the intermediate fixture and is provided in the hole into which the key can be inserted, so that the switch can be operated only by inserting the key.
That is, in the fourth invention, since the switch cannot be operated without using the key, erroneous operation of the switch does not occur. Therefore, it is possible to prevent the wire holding portion of the intermediate fixing fitting from being unintentionally opened.

According to the first invention as described above, it is possible to release (open state) only the intermediate fixing metal fitting operated by the key out of the pair of intermediate fixing metal fittings holding the safety wire.
This means that the intermediate fixtures that are not operated with the key can be securely locked (closed).
For this reason, in the first invention, one of the pair of intermediate fixing fittings is opened (opened) by operating the key, and the opened intermediate fixing fitting is slid on the safety wire, which is the installation position. It can pass through the safety device. After that, after closing (locking) one of the open intermediate fixing metal fittings, the other of the pair of intermediate fixing metal fittings is opened by operating the same key, and the other intermediate fixing metal fitting thus opened is opened. It is possible to pass the safety device by sliding it on the safety wire, which is the installation position of the. Furthermore, by closing (locking) the other intermediate fixing fitting that is open, the safety device can be passed through the holding positions of both of the pair of intermediate fixing fittings that hold the safety wire without removing it.
That is, in the first invention, either one of the pair of intermediate fixing fittings that hold the safety wire cannot be opened by the key, so the closed state (locked state) is maintained. Therefore, the safety wire can be held by either one of the pair of intermediate fixing fittings when the safety wire is passed through the safety device. Therefore, there is no concern that the safety wire will come off both of the pair of intermediate fixing fittings.
Therefore, according to the first invention, it is possible to preferably prevent the safety wire from being completely detached from the intermediate fixing fittings due to unintentional opening of both the pair of intermediate fixing fittings holding the safety wire. can be done.
Moreover, according to the first invention, it is not necessary to remove the safety device from the safety wire when passing the safety device through the installation position of the intermediate fixing fitting on the safety wire. Therefore, it is possible to ensure the safety of workers moving along the safety wire.

The second invention has the same effects as those of the first invention described above. Further, in the second invention, when the pair of clamping arms are closed, the ratchet mechanism maintains the closed state. Furthermore, according to the second invention, by providing the ratchet mechanism, the state in which the pair of clamping arms are completely closed becomes the state in which the wire holding portion is locked. Therefore, in the second invention, it is not necessary to perform a locking operation using a key in order to bring the wire holding portion into the locked state.
Furthermore, according to the second aspect of the invention, when the ratchet mechanism is released by operating the key, the pair of clamping arms are instantly opened by the elastic member, so that the wire holding portion can be opened very easily.
Therefore, according to the second invention, it is possible to provide an intermediate fixing fitting unit with excellent operability.

The third invention has the same effect as the above-described second invention. Furthermore, in the third invention, a belt is provided at the end of the clamping arm on the side of clamping the safety wire, so that the belt can be simply pressed by the safety wire toward the rotation shaft of the intermediate fixing fitting. The pair of clamping arms can be easily closed (locked).
Therefore, according to the third invention, it is possible to provide an intermediate fixing fitting unit which is more excellent in operability than the above-mentioned second invention.

The fourth invention has the same effects as those of the first invention described above. In addition, the switch for operating the motor drive mechanism is formed in the intermediate fixture and is provided in the hole into which the key can be inserted. In comparison, the risk of erroneous switch operation can be greatly reduced.
In addition, since the motor drive mechanism is provided as the lock structure, the wire holding portion can be reduced compared to the case where the combination of the elastic member and the ratchet mechanism (see the second and third inventions described above) is provided as the lock structure. It is possible to greatly reduce the work by a person for opening and closing the.
Therefore, according to the fourth invention, it is possible to provide an intermediate fixing fitting unit which is more excellent in operability than the second or third invention.
Furthermore, in the fourth invention, the only operation that the operator should perform on the intermediate fixture is switch operation using the key. Therefore, it is possible to greatly reduce the risk of a fall accident or the like by mistake while the worker is performing complicated work on the intermediate fixing metal fittings. Therefore, according to the fourth aspect, it is possible to significantly improve the safety of the worker during work.

FIG. 4 is an image diagram showing an enlarged main part of the intermediate fixing bracket unit according to the embodiment; 4(a) and 4(b) are image diagrams for explaining the procedure for using the intermediate fixture unit according to the present embodiment. FIG. It is a perspective view which shows the state which disassembled the intermediate fixing metal fitting which concerns on this embodiment. FIG. 4 is a perspective view showing a state in which a pair of clamping arms of the intermediate fixing bracket according to the embodiment are integrated; It is a horizontal cross-sectional view of an intermediate fixing bracket according to the present embodiment. FIG. 4 is a horizontal cross-sectional view showing a state in which the wire holding portion of the intermediate fixture according to the embodiment is opened; FIG. 5 is a horizontal cross-sectional view showing a state immediately before starting closing movement of the wire holding portion of the intermediate fixing fitting according to the present embodiment; FIG. 5 is a horizontal cross-sectional view showing a state in the middle of closing the wire holding portion of the intermediate fixing fitting according to the present embodiment; (a) is a perspective view showing a state in which an intermediate fixing metal fitting according to the present embodiment is locked, and (b) is a perspective view showing a state in which the intermediate fixing metal fitting is opened. (a) is a perspective view showing a state before starting the closing operation of the intermediate fixing bracket according to the present embodiment, and (b) is a perspective view showing a state in the middle of closing the intermediate fixing bracket. (a) is a perspective view showing a state in which an intermediate fixing metal fitting according to Modification 1 of the present embodiment is closed, and (b) is a perspective view showing a state in which the intermediate fixing metal fitting is opened. It is a side view of a steel tower provided with safety wires. FIG. 4 is a side view showing a state during work on the steel tower;

An intermediate fixture unit according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 11. FIG.

<1; Basic configuration of the present invention>
[1-1; Structure of basic configuration]
First, with reference to FIG. 1, the outline of the intermediate fixing bracket unit according to the present embodiment will be described.
FIG. 1 is an image diagram showing an enlarged main part of an intermediate fixing bracket unit according to this embodiment. 12 and 13 are denoted by the same reference numerals, and description of the configuration thereof will be omitted.
The intermediate fixture unit 1 according to the present embodiment includes an intermediate portion of the safety wire 50 (=excluding the end of the safety wire 50) that guides the safety device 54 (see FIG. 13) that prevents the worker 57 from falling. A unit comprising a plurality of supports for holding the entire area of the safety wire 50, e.g. and a key 6 for operating the intermediate fixing metal fitting 2 in a closed state (a state in which the safety wire 50 is held) in an open state (a state in which the safety wire 50 can be removed). , and a fixing member 5 for fixing each intermediate fixing metal fitting 2 to a structure (for example, a steel tower 51 as shown in FIG. 12) to which it is to be installed.

Further, as shown in FIG. 1, the intermediate fixing bracket 2 of the intermediate fixing bracket unit 1 according to the present embodiment is housed inside the wire holding portion 3 that holds the safety wire 50 and the base Q of the wire holding portion 3. A lock structure 7 is provided to open the wire holding portion 3 by operating the key 6 .
In the intermediate fixing bracket unit 1 according to the present embodiment, at least one pair of intermediate fixing brackets 2, 2 (see FIG. 1) are provided along the safety wire 50. The key 6 used for unlocking the built-in lock structure 7 is common to all the intermediate fixtures 2. As shown in FIG.
Furthermore, in the intermediate fixing bracket unit 1 according to the present embodiment, when the pair of intermediate fixing brackets 2, 2 are arranged on the safety wire 50, the gap L between the intermediate fixing brackets 2 is the gap L shown in FIG. It is necessary to set to such an extent that the safety device 54 shown in 1 can be arranged.
In the intermediate fixing bracket unit 1 according to the present embodiment, the reason why the pair of intermediate fixing brackets 2 provided along the safety wire 50 is more than "one set" is that the "bending point" on the safety wire 50 is the same. This is because there may be more than one location.

[1-2; How to use the basic configuration]
Here, how to use the intermediate fixing bracket unit 1 according to this embodiment will be described with reference to FIG.
2(a) and 2(b) are image diagrams for explaining the procedure for using the intermediate fixture unit according to the present embodiment. 1, 12, and 13 are denoted by the same reference numerals, and descriptions of their configurations are omitted.
Here, it is assumed that the worker 57 (not shown in FIG. 2) equipped with the safety device 54 shown in FIG. 13 moves vertically above the safety wire 50 from below. Furthermore, in FIG. 2, the two intermediate fixtures 2 forming a pair have the same structure. attached.

A worker 57 (see FIG. 13), not shown, first places a safety device 54 connected through a hook 58 to a safety belt 56 wrapped around the waist and fixed to a position indicated by symbol A in FIG. 2(a). (vertically below the intermediate fixing member 2), the key 6 is inserted into the key insertion hole 19a provided in the wire holding member 3 of the intermediate fixing member 2 to open the wire holding member 3. .
Due to the above operation by the operator 57, the lock structure 7 incorporated in the intermediate fixing bracket 2 shown in FIG. can be removed.
In this state, the operator 57 slides the safety device 54, which is placed at the position indicated by symbol A in FIG. 2(a), to the position indicated by symbol B in the same figure.
After that, the worker 57 manually operates the wire holding portion 3 of the intermediate fixture 2 to close it, so that the safety wire 50 can be sandwiched and held by the wire holding portion 3 again. That is, the intermediate fixture 2 is locked. After that, the operator 57 removes the key 6 from the closed (locked) intermediate fixture 2 .
Each of the intermediate fixing fittings (for example, the intermediate fixing fittings 2 and 2') according to this embodiment has an interlock mechanism that prevents the key 6 from being removed from the key insertion hole 19a when the wire holding portion 3 is open. I have it. That is, in the intermediate fixing bracket unit 1 according to the present embodiment, only when the pair of wire holding portions 3 constituting the intermediate fixing brackets (for example, the intermediate fixing brackets 2 and 2') are in the closed state (locked state), The key 6 can be extracted from the key insertion hole 19a.

Next, the operator 57 inserts the key 6 used for the opening operation of the intermediate fixing member 2 into the key insertion hole 19a of the intermediate fixing member 2' and opens it again, so that the key 6 is incorporated in the intermediate fixing member 2'. Lock structure 7 is released. By this operation, the wire holding portion 3 of the intermediate fixing member 2' is opened, so that the safety wire 50 can be removed from the intermediate fixing member 2' as shown in FIG. 2(b).
In this state, the operator 57 slides the safety device 54, which is placed at the position indicated by symbol B in FIG. 2(b), to the position indicated by symbol C in the same figure.
Thereafter, the worker 57 manually operates the wire holding portion 3 of the intermediate fixture 2' to close it, so that the safety wire 50 can be held by the wire holding portion 3 again. That is, the intermediate fixture 2' is locked. Thereafter, the operator 57 removes the key 6 from the closed (locked) intermediate fixture 2'.
Therefore, by the series of operations described above, the operator 57 can pass the safety device 54 to the position supported by the intermediate fixing metal fittings 2 and 2 ′ on the safety wire 50 .
When the worker 57 moves from the vertically downward side to the upward side of the safety wire 50 together with the safety device 54, the above procedure may be reversed.

[1-3; Actions and effects of basic configuration]
In the intermediate fixing bracket unit 1 according to the present embodiment as described above, when one of the pair of intermediate fixing brackets 2 and 2' holding the safety wire is operated with the key 6, the other is operated. Therefore, one of the paired intermediate fixtures 2, 2' is maintained in the closed state (locked state).
Therefore, when the safety device 54 is passed through the holding position by the intermediate fixing metal fittings 2, 2' on the safety wire 50, the safety wire 50 must be held by one of the pair of intermediate fixing metal fittings 2, 2'. can be done.
That is, according to the intermediate fixing bracket unit 1 according to this embodiment, both the pair of intermediate fixing brackets 2, 2' holding the safety wire 50 cannot be opened at the same time. Therefore, when the safety device 54 is passed through the holding position by the intermediate fixing metal fittings 2, 2' on the safety wire 50, the safety wire 50 is prevented from unintentionally coming off from both the intermediate fixing metal fittings 2, 2'. can be suitably prevented.
Further, according to the intermediate fixing bracket unit 1 according to the present embodiment, it is necessary to remove the safety device 54 from the safety wire 50 when passing the safety device through the installation position of the intermediate fixing metal fittings 2, 2' on the safety wire 50. There is no Therefore, the safety of the worker 57 moving along the safety wire 50 can be significantly improved.

<2; Detailed structure of the present invention>
Next, the detailed structure of the intermediate fixture 2 according to this embodiment will be described with reference to FIGS. 3 to 10. FIG.
The intermediate fixing fitting 2 according to this embodiment includes a lock structure 7 for switching between the open and closed states of the pair of clamping arms 4a and 4b that constitute the wire holding portion 3. The lock structure 7 connects the pair of clamping arms 4a and 4b. is built in the base Q of the
Further, the lock structure 7 includes an opening structure for keeping the pair of clamping arms 4a and 4b open, and a ratchet mechanism for maintaining the closing state of the pair of clamping arms 4a and 4b in stages. I have.
Further, in the intermediate fixing bracket 2 according to the present embodiment, the pair of holding arms 4a and 4b are released by releasing the ratchet mechanism by operating the key 6 as described above, and the wire holding portion 3 is opened. It is configured so that the safety wire 50 can be removed from the.

[2-1; Open Structure of Wire Holding Portion]
An opening structure for keeping the wire holding portion 3 of the intermediate fixing fitting 2 in the open state according to this embodiment will be described with reference to FIGS.
FIG. 3 is a perspective view showing an exploded state of the intermediate fixing metal fitting according to the present embodiment, and FIG. 4 is a perspective view showing an integrated state of a pair of clamping arms of the intermediate fixing metal fitting. The same parts as those shown in FIGS. 1, 2, 12, and 13 are denoted by the same reference numerals, and descriptions of the configurations thereof are omitted. Furthermore, FIGS. 3 and 4 omit the description of the ratchet mechanism, which will be described later.
As shown in FIGS. 3 and 4, the wire holding portion 3 of the intermediate fixture 2 according to this embodiment is composed of a pair of holding arms 4a and 4b.
Further, the holding arm 4a includes an arm body 9a that holds the outer surface of the safety wire 50, and a hollow container-like casing 11a provided at the base Q of the arm body 9a. Further, the arm body 9a has a recessed wire accommodation groove 10a on the surface facing the safety wire 50. As shown in FIG.
Similarly, the clamping arm 4b includes an arm body 9b that holds the outer surface of the safety wire 50, and a hollow container-like casing 11b provided at the base Q of the arm body 9b. Furthermore, the arm main body 9b has a concave wire housing groove 10b on the surface facing the safety wire 50. As shown in FIG.
FIG. 4 shows a state in which the clamping arms 4a and 4b as described above are combined and integrated.

As shown in FIGS. 3 and 4, the casing 11a formed at the base Q of the clamping arm 4a and the casing 11b formed at the base Q of the clamping arm 4b overlap each other while facing each other, so that the clamping arms 4a and 4b A hollow portion is formed in the base portion Q of the .
Further, in the hollow portion, a rotary shaft 8 for rotatably connecting the clamping arms 4a and 4b and a torsion spring 14 for biasing the paired clamping arms 4a and 4b apart from each other are housed. be.

More specifically, as shown in FIG. 3, the rotary shaft 8 has a hollow tubular fitting portion 8b having an insertion hole 8d on the central axis and an insertion hole 8d formed in the fitting portion 8b. It has a shaft body 8c that can be inserted, and a fitting portion 8a that is fixed to the end of the shaft body 8c that is not inserted into the insertion hole 8d.
In such a rotating shaft 8, the shaft body 8c is rotatable with respect to the fitting portion 8b by inserting the shaft body 8c into the insertion hole 8d formed in the fitting portion 8b.
Further, the rotating shaft 8 is configured such that the end of the fitting portion 8b (the end on the vertically lower side in FIG. 3) is connected to the hollow of the casing 11a in a state where the shaft main body 8c is inserted into the fitting portion 8b. The fitting portion 8a is fitted into a fitting bearing 12a projecting from the bottom surface (ceiling surface) of the hollow portion of the casing 11b, and the fitting portion 8a is fitted into a fitting bearing 12b projecting from the bottom surface (ceiling surface) of the hollow portion of the casing 11b. .

In this case, the clamping arm 4b and the shaft body 8c are interlocked. That is, the clamping arm 4b rotates in the direction indicated by symbol D in FIG. 3 with the shaft body 8c as the base axis.
Also, the clamping arm 4a and the fitting portion 8b are interlocked. In other words, the clamping arm 4a rotates in the direction indicated by symbol E in FIG. 3 with the shaft body 8b as the base axis.
Therefore, by integrally connecting the clamping arms 4a and 4b with the rotating shaft 8, the clamping arms 4a and 4b can be rotated about the rotating shaft 8 so as to open or close each other. can.

Further, a torsion spring 14 is accommodated in the hollow portion formed by the casings 11a and 11b, and a locking end 14a of the torsion spring 14 is locked to a spring locking portion 13a formed in communication with the hollow portion of the casing 11a. At the same time, by locking the other locking end 14b to a spring locking portion 13b formed in communication with the hollow portion of the casing 11b, the clamping arms 4a and 4b (arm The bodies 9a, 9b) can always be biased open.
That is, in the intermediate fixing metal fitting 2 according to this embodiment, the combination of the rotating shaft 8 and the torsion spring 14 is the opening structure of the clamping arms 4a and 4b.

Although not shown, when the holding arms 4a and 4b are connected by the rotating shaft 8, the end of the shaft body 8c on the side where the fitting portion 8a is not fixed (the end on the vertically lower side in FIG. 3) ) is led out of the casing 11b through the bottom surface of the casing 11b, and a nut (not shown) is provided at this lead-out portion, so that the clamping arms 4a and 4b can be inseparably integrated. In this case, it is possible to prevent the clamping arms 4a and 4b from unintentionally separating while the intermediate fixture 2 is in use.

[2-2; About the ratchet mechanism (closed structure) of the wire holding part]
Next, the ratchet mechanism that constitutes the lock structure in the intermediate fixing bracket 2 according to this embodiment will be described with reference to FIG.
The intermediate fixture 2 according to this embodiment has a ratchet mechanism inside.
Here, the structure of the ratchet mechanism of the wire holding portion 3 in the intermediate fixture 2 according to this embodiment will be described with reference to FIG.
FIG. 5 is a horizontal cross-sectional view of the intermediate fixture according to this embodiment. 1 to 4, 12 and 13 are denoted by the same reference numerals, and the description of the configuration thereof will be omitted.
The ratchet mechanism incorporated in the intermediate fixing bracket 2 according to the present embodiment is accommodated in a hollow portion formed by combining casings 11a and 11b as shown in FIG. A ratchet gear 15 that is fitted in and rotates in conjunction with the rotation of the fitting portion 8b, saw-toothed ratchet teeth 15a formed on the outer periphery of the ratchet gear 15, and the ratchet teeth 15a. It comprises a floating pawl 16 having an engaging end 16a which is detachably engaged, and a coil spring 21 which always biases the floating pawl 16 toward the ratchet gear 15 side.

The floating pawl 16 constituting the ratchet mechanism described above has a substantially circular base portion 16b at the end on the side not provided with the locking end 16a. It is housed in the communicating base housing hole 17 .
In addition, the communicating portion between the hollow portion formed by combining the casings 11a and 11b and the base housing hole 17 widens toward the hollow portion side, and the floating claw 16 moves freely (in the direction indicated by symbol F in FIG. 5). It has a structure that does not interfere with the rotation of the
Furthermore, a spring housing hole 20 is formed so as to intersect the communicating portion between the hollow portion formed by combining the casings 11a and 11b and the base housing hole 17. A coil spring 21 is housed in this spring housing hole 20, and the coil spring is 21 is always in contact with the floating pawl 16, the floating pawl 16 is always pressed toward the ratchet gear 15 side.
In addition, the floating pawl 16 that constitutes the ratchet mechanism described above has a key insertion hole 19b, which is aligned with the key insertion hole 19a (see FIGS. ).
Therefore, in the intermediate fixing bracket 2 according to the present embodiment, when the key 6 (see FIGS. 1 and 2) is inserted into the key insertion hole 19a formed on the outer surface of the clamping arm 4b, the tip of the key 6 side is inserted into the key insertion hole 19b formed in the floating claw 16. As shown in FIG.
Therefore, in the intermediate fixture 2 according to this embodiment, the key 6 can directly operate the floating pawl 16 that constitutes the ratchet mechanism.
That is, in the intermediate fixing metal fitting 2 according to the present embodiment, the ratchet gear is rotated by rotating the floating pawl 16 shown in FIG. The latching end 16a of the floating pawl 16 can be separated from the ratchet teeth 15a of 15, and this action releases the ratchet mechanism of the intermediate fixture 2 according to the present embodiment.
Although not particularly shown in FIGS. 3, 4, and 5, the intermediate fixing bracket 2 according to the present embodiment can It has an interlock mechanism that allows the key 6 to be removed from the key insertion hole 19a.
As such an interlock mechanism, a conventionally known interlock mechanism can be used without any trouble. More specifically, for example, when the pair of wire holding portions 3 constituting the intermediate fixing fitting 2 are in the open state, some locking structure engages the key 6, and the key 6 is pulled out from the insertion hole 19a. You may provide the structure which loses.

[2-3; Regarding the operation of the intermediate fixing bracket]
Here, a series of operations of the intermediate fixture 2 according to this embodiment will be described in more detail with reference to FIGS. 5 to 10. FIG.
FIG. 6 is a horizontal cross-sectional view showing a state in which the wire holding portion of the intermediate fixing fitting according to this embodiment is opened. FIG. 7 is a horizontal cross-sectional view showing the state immediately before starting the closing movement of the wire holding portion of the intermediate fixture according to the present embodiment. Furthermore, FIG. 8 is a horizontal cross-sectional view showing a state in which the wire holding portion of the intermediate fixing fitting according to this embodiment is opened. In addition, FIG. 9(a) is a perspective view showing a state in which the intermediate fixing fitting according to this embodiment is locked, and FIG. 9(b) is a perspective view showing a state in which the intermediate fixing fitting is opened. . FIG. 10(a) is a perspective view showing a state before the closing operation of the intermediate fixing member according to the present embodiment is started, and FIG. 10(b) shows a state during the closing operation of the intermediate fixing member. It is a perspective view showing. 1 to 5, 12 and 13 are denoted by the same reference numerals, and the description of the configuration thereof will be omitted.

5 and 9(a) show the intermediate fixture 2 according to the present embodiment in a closed state (locked state).
At this time, a force acts on the pair of clamping arms 4a and 4b (arm bodies 9a and 9b) by the torsion spring 14 so as to spread them apart.
At this time, as shown in FIG. 5, the engaging end 16a of the floating pawl 16 is engaged with the ratchet teeth 15a of the ratchet gear 15 interlocking with the pivoting movement of the fitting portion 8b on the pivot shaft 8. . As a result, the operation of opening the clamping arms 4a and 4b by the torsion spring 14 is prevented, and the closed state of the pair of clamping arms 4a and 4b is maintained. That is, as shown in FIG. 9A, the pair of clamping arms 4a and 4b are locked in a closed state.

When the key 6 is inserted into the key insertion hole 19a formed in the outer surface of the intermediate fixing member 2 in this state, the tip of the key 6 is also inserted into the key insertion hole 19b formed in the floating claw 16 (see FIG. 6). reference).
In this state, when the key 6 is rotated clockwise (in the direction indicated by symbol F in FIG. 5), the engagement between the floating pawl 16 and the ratchet gear 15 is released as shown in FIG. be. Along with this operation, the clamping arm 4b (arm body 9b) biased by the torsion spring 14 rotates in the counterclockwise direction (the direction indicated by symbol G in FIG. 6), thereby rotating the clamping arm. 4a, 4b (arm bodies 9a, 9b) are opened (see FIGS. 6 and 9(b)).
In this case, the safety wire 50 held by the pair of clamping arms 4a and 4b can be removed from the intermediate fixture 2, as shown in FIGS.

Further, FIG. 9(b) shows a state in which the key 6 inserted into the key insertion hole 19a (key insertion hole 19b; see FIG. 6) of the intermediate fixing member 2 is released from the turning operation by the operator. 7 and 10(a).
At this time, the floating pawl 16 of the ratchet mechanism is released from the external force acting to resist the pressing force of the coil spring 21 . As a result, the locking end 16a of the floating pawl 16 is again pressed toward the ratchet gear 15 by the coil spring 21, and the locking end 16a of the floating pawl 16 engages with the ratchet teeth 15a. As a result, the ratchet mechanism again restricts the rotation of the clamping arms 4a and 4b. That is, as shown in FIGS. 7 and 10(a), the clamping arms 4a and 4b are locked in an open state.

Furthermore, in order to change the holding arms 4a and 4b from this state to the completely closed state, the holding arm 4b shown in FIG. 10(a) is moved toward the holding arm 4a side as shown in FIG. 10(b). What is necessary is just to press and rotate.
At this time, since the floating pawl 16 and the ratchet gear 15 are engaged with each other, the rotation of the clamping arm 4b toward the clamping arm 4a is prevented. Due to this pressing force, the coil spring 21 accommodated in the spring accommodation hole 20 is elastically contracted. As a result, the engaging relationship between the floating pawl 16 and the ratchet gear 15 is temporarily released, and the clamping arm 4b rotates toward the clamping arm 4a. , the nipping arms 4a and 4b are maintained as they are.
By continuing the above-described operation, the pair of clamping arms 4a and 4b are gradually closed, finally brought into a completely closed state, and maintained in that state.
5 and 9(a) show the state in which the clamping arms 4a and 4b are completely closed and locked. Further, the key 6 can be extracted from the insertion hole 19a in the state shown in FIGS. 5 and 9(a).

5 to 8, the case where the ratchet teeth 15a are provided all over the outer circumference of the ratchet gear 15 is described as an example, but the ratchet teeth 15a are provided only in a desired area on the outer circumference of the ratchet gear 15. A detent structure for the ratchet gear 15 may be provided adjacent to the ratchet teeth 15a (not shown, optional component).
In this case, the total number of ratchet teeth 15a formed on the outer circumference of the ratchet gear 15 (or the length of the formation area of the ratchet teeth 15a) can determine the amount of rotation of the clamping arm 4b. In this case, for example, when the clamping arms 4a and 4b are opened, it becomes easy to set the gap between the clamping arms 4a and 4b as desired.

Furthermore, in the intermediate fixing bracket 2 according to the present embodiment, the case where the ratchet mechanism is incorporated in the intermediate fixing bracket 2 has been described as an example, but a part of the ratchet mechanism (for example, the floating pawl 16 and its biasing means) coil spring 21, etc.) may be disposed outside the intermediate fixture 2 (an optional component).
More specifically, the floating claw 16 constituting the intermediate fixture 2 according to the present invention and the coil spring 21 as its urging means are housed in a dedicated storage space (not shown) between the connecting portion of the intermediate fixture 2 and the fixing member 5. A case may be provided separately and stored therein.
In this case, the clamping arms 4a and 4b constituting the intermediate fixing member 2 can be structured simply, and the floating claw 16 and the key insertion hole 19a (and the key insertion hole 19b) of the key 6 for operating the floating claw 16 can be made simple. can be set larger than shown in the figures of the present application.
In this case, the operation by the worker 57 using the key 6 to the intermediate fixture 2 can be made easier.

[2-4; Actions and effects of the intermediate fixing bracket having the lock structure]
According to the intermediate fixture 2 according to the present embodiment having the lock structure 7 as described above, the gripping arms 4a and 4b can be easily opened by operating the key 6. As shown in FIG.
Further, according to the intermediate fixing fitting 2 having the lock structure 7 as described above, no special operation is required to maintain the completely closed state of the clamping arms 4a and 4b.
Therefore, according to the intermediate fixture 2 having the lock structure 7 as described above, it is possible to provide an intermediate fixture with excellent operability.
In addition, the fact that it does not take time to open or close and lock the intermediate fixing bracket 2 greatly reduces the burden on the operator 57 when passing the safety device 54 through the supporting position of the intermediate fixing bracket 2. It means that it can be mitigated.
In this case, it is possible to reduce the risk of the worker 57 falling when passing through the supporting position of the intermediate fixture 2 .
Therefore, according to the intermediate fixing bracket unit 1 according to the present embodiment, it is possible to further improve the safety of the worker 57 during work.

<3; Modification of basic configuration>
When using the intermediate fixture 2 shown in FIGS. 5 to 10, and when closing the intermediate fixture 2 after passing the safety device 54 through the supporting position of the intermediate fixture 2, the worker 57 should While holding and fixing the wire 50 with one hand, it is necessary to operate the clamping arm 4b with the other hand to press and rotate the clamping arm 4a.
In this case, the physical burden on the operator 57 can be greatly reduced compared to opening and closing the pair of clamping arms by operating a handle or the like, for example. Since it is necessary to use both hands to fix the safety wire 50, the physical burden on the worker 57 is still great.
In view of such circumstances, an intermediate fixing member according to Modification 1 shown later is improved so that the closing operation of the intermediate fixing member 2 can be performed more easily.

[3-1; Intermediate fixing bracket according to modification 1]
FIG. 11(a) is a perspective view showing a closed state of an intermediate fixing member according to Modification 1 of the present embodiment, and FIG. 11(b) is a perspective view showing an open state of the same intermediate fixing member. 1 to 10, 12 and 13 are denoted by the same reference numerals, and the description of the configuration thereof will be omitted.
As shown in FIGS. 11(a) and 11(b), the intermediate fixing member 24 according to Modification 1 of the present embodiment is configured such that the ends P of the clamping arms 4a and 4b of the intermediate fixing member 2 shown in FIGS. , P is provided.
11(a) and 11(b), the belt 22 is fixed to each of the ends P and P of the clamping arms 4a and 4b of the intermediate fixing bracket 24 according to Modification 1 using fasteners 23 such as screws. Although the case where the belt 22 is attached is taken as an example, the fasteners 23 of the belt 22 may be fasteners other than screws.

Further, in the intermediate fixing bracket 24 according to Modification 1, as shown in FIG. 11(a), when the clamping arms 4a and 4b constituting the wire holding portion 3 are closed, the belt is placed on the peripheral side surface of the safety wire 50. The safety wire 50 is clamped by the wire holding portion 3 while the wire 22 is wound thereon.
Furthermore, in the intermediate fixing fitting 24 according to Modification Example 1, as shown in FIG. The safety wire 50 is pushed out from the wire receiving grooves 10a, 10b by the belt 22 pulled by the clamping arms 4a, 4b.

In the state shown in FIG. 11(b), the intermediate fixing bracket 24 according to Modification 1 as described above can be easily removed by grasping the safety wire 50 and pushing it toward the rotating shaft 8 together with the belt 22. The clamping arms 4a and 4b can be closed as shown in 11(a).
Therefore, according to the intermediate fixing bracket 24 according to Modification 1 as shown in FIGS. 4b can be closed with only one hand.
Therefore, according to the intermediate fixing metal fitting 24 according to Modification 1, it is possible to provide an intermediate fixing metal fitting unit including the intermediate fixing metal fitting 24 with even better operability.
Although not shown, the intermediate fixture 24 according to Modification 1 also has an interlock mechanism that allows the key 6 to be pulled out only when the clamping arms 4a and 4b are closed.

[3-2; Intermediate fixing bracket according to modification 2]
In the intermediate fixture unit 1 according to the present embodiment, the clamping arms 4a and 4b are opened using the torsion spring 14 (see FIG. 3 above), and the ratchet mechanism (see FIGS. 6 to 8 above). Although the case where the lock structure 7 having good.
More specifically, a motor drive mechanism (not shown) may be used as lock structure 7 (optional component).
In this case, a gear (not shown) interlocking with the clamping arm 4b and the shaft body 8c is provided in the hollow portion formed by the casings 11a and 11b shown in FIGS. By providing an internal gear (not shown) interlocking with, further interposing another gear between the gear and the internal gear, and connecting this another gear to the motor built in the intermediate fixing bracket 2, A motor drive mechanism may be used to open and close clamping arms 4a and 4b (optional component).

Furthermore, when the clamping arms 4a and 4b are operated by a motor driving mechanism in the intermediate fixing bracket according to the modified example 2, it is necessary to provide the intermediate fixing bracket according to the modified example 2 with a switch for operating the motor.
In this case, if a switch is provided on the outer surface of the intermediate fixing bracket according to Modification 2, there is a possibility that the operator 57 may touch the switch unintentionally, causing the motor to malfunction.
In view of such circumstances, in the intermediate fixing bracket according to Modification 2, a hole (not shown) into which a key can be inserted is formed on the outer surface of the member (for example, the clamping arms 4a, 4b, etc.) that constitutes the intermediate fixing bracket. A switch for operating the motor may be provided in the hole.
In this case, the switch can be operated only by inserting the key provided separately from the intermediate fixing bracket according to Modification 2 into the hole, and erroneous operation of the switch can be prevented.
The intermediate fixing bracket according to Modification 2 also has an interlock mechanism that allows the key to be extracted only when the clamping arms 4a and 4b are closed.

Furthermore, the intermediate fixing bracket unit provided with the intermediate fixing bracket according to Modification 2 as described above has disadvantages such as the fact that it requires electric power for its operation and that it is likely to break down when exposed to rainwater. However, it has a unique effect that the work by the operator 57 can be done only by the switch operation with the key.
For this reason, the intermediate fixing bracket unit provided with the intermediate fixing bracket according to Modification 2 as described above can supply electric power for operating the intermediate fixing bracket, and the intermediate fixing bracket may be exposed to rainwater. It is particularly suitable for installation and use indoors where there is no
In this case, by using the intermediate fixing bracket according to Modification 2, the work to be performed by the operator 57 on the intermediate fixing bracket can be further reduced. be able to.
The effect of the intermediate fixing metal fitting unit using the intermediate fixing metal fitting according to Modification 2 is the same as the effect of the intermediate fixing metal fitting unit 1 according to the basic configuration described above.

INDUSTRIAL APPLICABILITY As described above, the present invention is an intermediate fixture unit for holding an intermediate portion of a safety wire that guides a safety device worn by a worker during work at height. It can be used in technical fields related to equipment for inspection and maintenance.

Reference Signs List 1 Intermediate fixing bracket unit 2, 2' Intermediate fixing bracket 3 Wire holding part 4a, 4b Clamping arm 5 Fixed member 6 Key 7 Lock structure 8 Rotating shaft 8a, 8b Fitting part 8c... Axis body 8d Insertion hole 9a, 9b Arm body 10a, 10b Wire housing groove 11a, 11b Casing 12a, 12b Fitting bearing 13a, 13b Spring locking portion 14 Torsion spring 14a, 14b Locking end DESCRIPTION OF SYMBOLS 15... Ratchet gearwheel 15a... Ratchet tooth 16... Floating claw 16a... Locking end 16b... Base part 17... Base part accommodation hole 19a, 19b... Key insertion hole 20... Spring accommodation hole 21... Coil spring 22... Belt 23... Fixing tool 24... Intermediate Fixing bracket 50 Safety wire 51 Steel tower (structure) 52 Intermediate support bracket 53 Fixing member 54 Safety device 55 Band 56 Safety belt 57 Worker 58 Hook P tip Q base L gap

Claims (4)

An intermediate fixture unit for holding an intermediate portion of a safety wire that guides a safety device that prevents a worker from falling,
The intermediate fixture unit is
at least one pair of intermediate fixing fittings provided on the safety wire, comprising: a wire holding portion for holding the safety wire; and a lock structure for switching between open and closed states of the wire holding portion;
a fixing member for fixing each of the intermediate fixing brackets to a structure to be installed;
a key that is provided separately from the intermediate fixing fitting, is shared by all the lock structures, and unlocks the lock structure to open the wire holding portion. Intermediate fixing bracket unit. The wire holding part is
a pair of clamping arms that clamp the safety wire;
a rotating shaft that rotatably connects the end portions of the pair of clamping arms that do not clamp the safety wire;
The lock structure is
an elastic member that biases the ends of the pair of clamping arms on the side that clamps the safety wire to an open state;
a ratchet mechanism that regulates the pivoting motion of the holding arms to open the pair of holding arms;
2. The intermediate fixture unit according to claim 1, wherein the ratchet mechanism is released by the key to open the pair of clamping arms from the closed state. 3. The intermediate fixture unit according to claim 2, wherein the ends of the pair of clamping arms that clamp the safety wire are provided with a belt extending between the ends. The lock structure is a motor drive mechanism built into the intermediate fixing bracket,
The intermediate fixing bracket has a hole into which the key can be inserted,
A switch for operating the motor drive mechanism is provided in the hole,
2. The intermediate fixture unit according to claim 1, wherein the wire holding portion is opened by inserting the key into the hole and operating the switch.

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