JP4521960B2 - Scaffolding bolt hook - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scaffold bolt hook used for wiring work or electrical work on a pillar.
[0002]
[Prior art]
In general, when working on a pillar, an auxiliary rope is used together with a safety belt on the pole having a rope for U-shaped suspension. This auxiliary rope is connected to an annular body attached to the waist belt of the safety belt on the pole, and a hook that can be engaged with a scaffold bolt provided on the electric pole is attached to the tip.
[0003]
When working on the pole, work in a U-shaped hanging state that embeds the utility pole with the rope on the pole safety belt. When changing the work position, if there is an obstacle such as a sleeve signboard, the tip of the auxiliary rope The hook is engaged with the scaffold bolt to ensure safety, and then the rope on the pillar safety belt is removed to move.
[0004]
Here, the scaffold bolt has a large-diameter portion at the tip, and the hook engaged with the scaffold bolt is prevented from coming off by the large-diameter portion.
[0005]
For this reason, even if the hook is engaged with the tip of the scaffold bolt, the hook is not likely to come off from the scaffold bolt. Otherwise, the scaffold bolt may be bent or broken.
[0006]
For this reason, it is instructed that the hook engages with the base portion near the surface of the electric pole of the scaffold bolt.
[0007]
By the way, in the hook conventionally known, since the opening of the collar part engaged with the scaffold bolt is larger than the outer diameter of the scaffold bolt, even if the hook is engaged with the base part of the scaffold bolt, There has been a problem that the hook cannot move to the tip side of the scaffolding bolt due to the swinging movement of the auxiliary rope accompanying the change of position, and the engagement position cannot be maintained.
[0008]
In order to solve such problems, Japanese Utility Model Registration No. 2586922 proposes a hook for a scaffold bolt that can maintain the position of engagement with the scaffold bolt. This scaffold bolt hook swings on the abdomen side of the hook body with a swingable single-opening blade that opens and closes the buttock opening of the hook body, and swings in the opening direction in conjunction with the swinging movement of the single-opening blade. Gripping wings are provided on the back side of the hook body, and the hooks move in the axial direction (lateral direction) of the scaffolding bolt by pressing and engaging the tip of the gripping wing to the outer periphery of the scaffolding bolt with which the hook is engaged I try to prevent it.
[0009]
[Problems to be solved by the invention]
By the way, in the scaffold bolt hook described in the above publication, the tip edges of the pair of side plates provided on the gripping wing are engaged with the outer peripheral surface of the scaffold bolt so as to prevent lateral movement of the hook. The width dimension between the engagement positions of the side plates with respect to the outer peripheral surface of the scaffold bolt is as small as several millimeters.
[0010]
For this reason, if the auxiliary rope swings as the work position changes, the hook may tilt around the position of engagement with the scaffolding bolt, and the gripping wing may swing in the open direction, causing the hook to move laterally. The point to be improved in securing the engagement position remains.
[0011]
Here, by increasing the pressing force of an elastic member such as a spring that presses the gripping wing in the closing direction, it is possible to prevent the hook from moving in the lateral direction. At this time, an operating force greater than the resultant force of the two elastic members, that is, an elastic member that presses the single-opening blade in the closing direction and an elastic member that presses the gripping blade in the closing direction is applied to the single-opening blade. Necessity arises and operability deteriorates.
[0012]
In general, an auxiliary rope is attached with an eight-shaped ring having a hole through which the rope is inserted and a hole with which the hook is engaged, and when the auxiliary rope is used around a utility pole arm or the like, the eight-shaped ring is used. A hook is engaged with the auxiliary rope, and a loop for engagement is provided at the tip of the auxiliary rope. At this time, it is necessary to open the opening of the buttock by opening the one-sided blade. At this time, similarly to the above, the one-sided blade includes an elastic member that presses the one-sided blade, a pressing force, and a gripping blade. There is a problem in operability because it is necessary to apply an operating force that exceeds the resultant force of the pressing force of the elastic member that presses.
[0013]
A first object of the present invention is to improve the effect of preventing lateral movement of a hook engaged with a scaffold bolt.
[0014]
A second object of the present invention is to improve the operability when the hook is engaged with the 8-ring.
[0015]
[Means for Solving the Problems]
In order to solve the first problem, in the first invention, a swingable one-sided wing that opens and closes the opening of the hook portion provided with a hook portion at the tip of the hook body connected to the tip of the auxiliary rope. Is provided on the abdomen side of the hook body, the opening of the hook part is shielded over a predetermined range on the back side of the hook body, and the opening of the hook part is interlocked with the swinging of the one-side blades in the opening direction. A pair of side plates provided on the gripping wing. In the hook for a scaffolding bolt, which is engaged with the outer periphery of the scaffolding bolt with which the heel part is engaged to prevent the hook from moving in the axial direction of the scaffolding bolt, a pair of gripping wings When the side plate is bent outward, To form a engaging piece that is inclined toward the abdomen side from the back side of the hook body, the bending angles relative to the side plates of the engaging piece is to that a structure in which a 90 ° or more.
[0016]
When configured as described above, the single open blade is pressed in the opening direction, the single open blade and the gripping blade swinging in conjunction with the single open blade are opened, and the hook portion of the hook body is engaged with the scaffold bolt. When the pressing force of the single blade is released, the outer edges of the pair of engaging pieces provided on the gripping wing are engaged with the scaffold bolt, and the engagement prevents the hook from moving in the axial direction of the scaffold bolt. Is done.
[0017]
In this way, the outer edges of the pair of engaging pieces are engaged with the outer peripheral surface of the scaffolding bolt, thereby comparing the tip edges of the pair of side plates provided on the gripping wing with the outer peripheral surface of the scaffolding bolt. Thus, the dimension between the engagement positions becomes long, and the hook body can be prevented from being tilted due to the swinging movement of the auxiliary rope connected to the rear end portion of the hook body. Therefore, the effect of preventing the lateral movement of the hook is extremely high, and it is possible to reliably prevent the hook from moving in the axial direction of the scaffold bolt.
[0018]
In order to solve the second problem, in the second invention, in the scaffold bolt hook according to the first invention, the auxiliary rope is inserted between one end of the engagement piece and the inner surface of the collar portion. And an interval corresponding to the size of the gap between the one-side open blade and the gripping blade. A configuration with direction play was adopted.
[0019]
If comprised as mentioned above, it engages with a collar part by the hole of an 8-shaped ring by pressing a piece open blade and rocking the piece open blade until there is no play formed between holding blades. Can be made. At this time, the single blade needs only to compress and deform the elastic member that presses the single blade, and does not need to compress and deform the elastic member that presses the gripping blade. Is small and the operability can be improved.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the hook body 1 has a flange portion 2 at the front end, a rope connection hole 3 is formed at the rear end, and the auxiliary rope L shown in FIG. 2 is connected to the rope connection hole 3. A connecting tool 4 is attached.
[0021]
On the abdomen side of the hook body 1, a single blade 5 is provided. The single blade 5 has a pair of side plates 5 a, and the rear end portion of the side plates 5 a is supported on the rear end portion of the hook body 1 via a pin 6 so as to be swingable. This one-sided blade 5 opens and closes the opening of the collar part 2 by swinging around the pin 6, and closes the collar part 2 by an elastic member 7 made of a spring provided between the hook body 1 and the abdomen. It is pressed toward.
[0022]
A pair of side plates 5 a provided on the single blade 5 has an arc-shaped long hole 8 centered on the pin 6 and the end of the long hole 8 on the hook body 1 side toward the rear end of the single blade 5. And an engagement hole 9 facing the surface.
[0023]
The back of the hook body 1 is provided with an auxiliary wing 10 on the rear end side and a gripping wing 11 on the front end side. The auxiliary wing 10 has a pair of L-shaped side plates 10 a, and the center portion of the side plates 10 a is supported by the hook body 1 via a pin 12 so as to be swingable.
[0024]
The front end portions of the pair of side plates 10a face the outer surface of the single-sided blade 5, and an engagement pin 13 is provided between the front end portions. The engagement pin 13 locks the single-opening blade 5 in a closed state while being inserted into an engagement hole 9 provided in the single-opening blade 5, and locks the single-opening blade 5 in a state of facing one end of the long hole 8. Is released to open and close the one-sided blade 5 freely.
[0025]
The auxiliary wing 10 is pressed in the locking direction in which the engaging pin 13 fits into the engaging hole 9 by an elastic member 14 made of a spring provided between the auxiliary blade 10 and the back portion of the hook body 1.
[0026]
The gripping wing 11 is provided with a pair of side plates 11 b on both sides of a plate body 11 a disposed to face the back portion of the hook body 1. The rear end portions of the pair of side plates 11 b are rotatably supported by the pins 12 that support the auxiliary wings 10.
[0027]
The gripping wing 11 is urged in a direction (closing direction) in which the plate body 11 a abuts against the back portion of the hook body 1 by an elastic member 15 made of a kick spring supported by the pin 12. The tip portions of the pair of side plates 11b shield the opening of the flange portion 2 over a required range while being in contact with the back portions.
[0028]
A pair of engagement pieces 16 that are bent outward are provided at the tips of the pair of side plates 11 b in the gripping wing 11. The engagement piece 16 is inclined from the back side of the hook body 1 toward the abdomen side, and an interval is provided between the end of the abdomen side and the inner surface of the collar 2 so that the 8-ring 18 shown in FIG. It has been.
[0029]
Here, the 8-shaped ring 18 has two holes 18a and 18b, the auxiliary rope L is inserted into one hole 18a, and the other hole 18b is engageable with the flange portion 2 of the hook body 1. Yes.
[0030]
As shown in FIG. 4, the bending angle α of the pair of engaging pieces 16 with respect to the pair of side plates 11b is 90 ° or more.
[0031]
An interlocking pin 19 is provided at the center of one side of the pair of side plates 11 a in the gripping wing 11. The interlocking pin 19 is pressed by the single-opening blade 5 when the single-opening blade 5 is swung in the opening direction, and there is a play δ between the interlocking pin 19 and the single-opening blade 5. Is provided. This play δ corresponds to the size of the gap formed between the end of the engagement piece 16 and the inner surface of the flange 2, and the eight-shaped ring 5 is swung until the play δ is eliminated. The flange 2 can be removed from the 18 holes 18b.
[0032]
The scaffold bolt hook shown in the embodiment has the above structure, and FIGS. 3 and 4 show a state in which the hook is engaged with the scaffold bolt A provided on the utility pole. When the hook is engaged, the auxiliary wing 10 is gripped, and the auxiliary wing 10 is swung to the unlocking position where the engagement pin 13 faces the end of the long hole 8 from the engagement hole 9. Is pressed to swing in the opening direction, and the interlocking pin 19 is pressed by the one-side blade 5 to swing the gripping blade 11 in the opening direction. With the opening of the heel part 2 open, the heel part 2 is engaged with the scaffold bolt A, and after the engagement, the pressing of the one-sided blade 5 is released.
[0033]
When the pressing of the one-sided blade 5 is released, the one-sided blade 5 swings in the closing direction by the pressing of the elastic member 7 and closes the opening of the flange 2, while the gripping blade 11 is closed in the closing direction by the pressing of the elastic member 15. The pair of engaging pieces 16 engage with the scaffold bolt A during the swinging. At this time, since the bending angle α of the engaging piece 16 with respect to the side plate 11b of the gripping piece 11 is 90 ° or more, the outer edge 16a of the engaging piece 16 engages with the outer peripheral surface of the scaffold bolt A, As a result, the hook is held in the engaged state.
[0034]
Thus, by engaging the outer edges 16a of the pair of engaging pieces 16 provided at the tips of the side plates 11b of the gripping piece 11 with the outer peripheral surface of the scaffold bolt A, the hook will move in the axial direction of the scaffold bolt A. Then, the edge 16a acts so as to bite into the scaffold bolt A, and the hook can be prevented from moving in the axial direction of the scaffold bolt A.
[0035]
Further, by engaging the outer edges 16a of the pair of engaging pieces 16 with the outer peripheral surface of the scaffold bolt A, the tip edges of the pair of side plates of the gripping wing are engaged with the outer peripheral surface of the scaffold bolt A. The size between the engagement positions can be made larger than that of the hook. For this reason, there is no inconvenience that the hook is inclined even if the auxiliary rope L is swung when the utility pole is raised and lowered, and the hook is stably held at the engagement position.
[0036]
In the engaged state of the hook with respect to the scaffolding bolt A, when the operator falls, the auxiliary rope L is tensioned and the impact is received when the worker is received, or the scaffolding bolt A is bent due to the impact, and the hook is turned into the scaffolding bolt. When it moves to the front end side of A, one of the pair of engaging pieces 16 comes into contact with the head a of the scaffold bolt A, and the contact prevents the hook from falling off the scaffold bolt A.
[0037]
When the tip of the auxiliary rope L is hung around the arm of the utility pole, etc., after swinging the auxiliary wing 10 to the unlocking position, as shown in FIG. The one-sided blade 5 is swung in the opening direction until it disappears, and the collar part 2 is opened. After the collar part 2 is engaged with the hole 18b of the 8-shaped ring 18, the pressure on the one-sided blade 5 is released. Thus, the single-opening blade 5 is swung to the closed position where the opening of the flange portion 2 is closed by the pressing force of the elastic member 7.
[0038]
As described above, when the flange portion 2 is engaged with the engagement hole 18 b of the 8-ring 18, the play δ is generated against the elasticity of the elastic member 7 that presses the single blade 5 to press the single blade 5. Since the elastic member 15 that presses the gripping wing 11 toward the closing direction does not need to be deformed, it is possible to oscillate the one-side wing 5 in the opening direction with a small operating force. The operability can be improved.
[0039]
【The invention's effect】
As described above, in the present invention, a pair of engagement pieces that bend outward are provided at the tips of the pair of side plates provided on the gripping wing, and the bending angle of the engagement pieces with respect to the side plate is 90 ° or more. Since the outer edges of the pair of engaging pieces are engaged with the outer peripheral surface of the scaffolding bolt, the hook engaged with the scaffolding bolt moves in the axial direction of the scaffolding bolt, or the inclination is caused by the swinging motion of the auxiliary rope. Can be prevented, and the effect of preventing the lateral movement of the hook can be improved.
[0040]
In addition, by providing play between the one-sided blade and the gripping wing that swings in the opening direction in conjunction with the swinging of the one-sided blade in the opening direction, a hook portion is provided in the hole of the 8-shaped ring. When engaged, it is only necessary to swing the one-sided blade in the opening direction until there is no play, and the one-sided blade can be easily opened with a small operating force, and the operability can be improved. .
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing an embodiment of a scaffold bolt hook according to the present invention. FIG. 2 is a front view of a state where a hook portion of the scaffold bolt hook shown in FIG. 3 is a front view of the scaffold bolt hook shown in FIG. 1 engaged with the scaffold bolt. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
DESCRIPTION OF SYMBOLS 1 Hook main body 2 Gutter part 5 Single-opening blade 7 Elastic member 11 Holding blade 11b Side plate 15 Elastic member 16 Engagement piece 18 Eight ring

Claims (2)

A hook part is provided at the tip of the hook body connected to the tip of the auxiliary rope, and a swingable one-side wing for opening and closing the opening of the hook part is provided on the abdomen side of the hook body, and on the back side of the hook body. Providing a swingable gripping blade that shields the opening of the collar part over a predetermined range and swings in a direction to open the opening of the collar part in conjunction with swinging in the opening direction of the one-sided blade; Each of the one-sided wing and the holding wing is pressed toward the closing direction by an elastic member, and the tips of a pair of side plates provided on the holding wing are engaged with the outer periphery of the scaffold bolt with which the collar portion is engaged. In the scaffold bolt hook that prevents the hook from moving in the axial direction of the scaffold bolt, the hook is bent outwardly at the distal ends of the pair of side plates provided on the gripping wing, and the back of the hook body From the side to the abdomen Forming a scaffold bolt hook the bending angle with respect to the side plates of the engaging pieces, characterized in that a 90 ° or more. An interval is provided between the one end of the engagement piece and the inner surface of the flange portion so that an eight-shaped ring having a hole through which the auxiliary rope is inserted and a hole to which the flange portion is engaged can be detached. 2. The scaffold bolt hook according to claim 1, wherein a play in a swinging direction corresponding to the size of the gap is provided between the wing and the gripping wing.

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