JP2020008121A - Fall prevention metal fitting - Google Patents

Abstract

To provide a fall prevention metal fitting capable of safely and rapidly performing the work when attaching fall prevention metal fittings such as split pins and snap pins to the tip of other members such as bolts without the need of tools, and eliminating human errors.SOLUTION: A fall prevention metal fitting 1 that is inserted into an insertion hole 16 of a bolt 15 and deforms a portion protruding from the insertion hole 16 to prevent the bolt 15 from coming off, comprises an insertion pin 2 and a pull-out pin 3 where tips 11 and 13 are joined together. The insertion pin 2 includes: a head 6 that prevents the movement when inserted into the insertion hole 16; a locking part 4 protruding from the insertion hole 16; and an insertion part 5 that remains in the insertion hole 16. The locking part 4 is formed with fragile parts 9, 10, 10, and 11, and inserted through the insertion hole 16 together with the insertion pin 2, and then the pull-out pin 3 is pulled out to bend and deform the locking part 4 of the insertion pin 2 to thereby prevent the bolt 15 from coming out of the insertion hole 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fall-off prevention fitting for preventing a bolt from coming off a structural member after a bolt, a pin, a shaft, or the like is penetrated through a structural member or a mechanical component, and particularly to easily attach the bolt to a bolt or the like. The present invention relates to a fall-off prevention fitting which can be used.

  For example, drop-off prevention fittings are generally called split pins or snap pins, which are inserted into split pin insertion holes formed at the tip of another member such as a bolt, and the tip of the split pin is expanded to form a bolt or the like. Prevents the member from coming off.

  In order to attach such a split pin to the tip of the bolt, it is necessary to penetrate the bolt through the structural member and then insert the split pin into the split pin insertion hole at the tip of the bolt. At this time, the operator holds down the bolt with one hand, and inserts the split pin into the split pin insertion hole at the tip of the bolt with the other hand. Next, the attachment is completed by bending the tips of the split pins in directions away from each other.

  However, the work of inserting the split pin into the split pin insertion hole and then bending the tip of the split pin is to fix the split pin or bolt with one hand and bend the tip of the split pin with the other hand and holding the tool. It had to be troublesome and troublesome.

  Further, the bending of the tip of the split pin is performed with the skill (feeling) of the installer, and if the opening angle is insufficient, an accident that the bolt falls off from the structural member is induced.

  In addition, when working in high places such as power transmission line work, it is extremely difficult to perform the work while ensuring personal safety.

  To solve such a problem, Patent Literature 1 discloses a split pin including a short axis and a long axis, one end of which is joined and a head is formed at the other end of the short axis.

  This split pin is inserted into the split pin insertion hole such as a bolt so that both ends protrude, and then the long axis protruding from the short axis is driven in with a hammer etc. The split pin is prevented from falling out of the split pin insertion hole by the deformation.

Japanese Utility Model Publication No. 7-25319

  However, in the invention of Patent Document 1, a tool such as a hammer for hitting the long axis is required, and handling the tool at a high place has a risk of falling.

  In addition, hitting with a hammer must be performed accurately, and there is also a problem that detailed work is required and lack of quickness.

  In addition, the bolt must be firmly fixed with one hand and the other hand must be hammered with a hammer, and both hands must be used.Working with both hands is extremely unstable and dangerous at high places. There was a problem that is.

  Therefore, an object of the present invention is to provide a fall-off prevention bracket that does not require tools, eliminates human error regardless of the skill of the installer, and can therefore perform work safely and quickly even at high places such as a steel tower. To provide.

  In order to achieve the above object, the invention according to claim 1 is a fall-off prevention fitting that is inserted into an insertion hole of another member, deforms a portion protruding from the insertion hole, and prevents the portion from being removed from the other member, At the same time, the insertion pin and the extraction pin are inserted into the insertion hole, and in a state where the extraction pin is inserted into the insertion hole of the insertion pin, or in a state where the insertion pin and the extraction pin are arranged in parallel, the tips of the insertion pin and the extraction pin are The insertion pin is coupled by coupling means, and the insertion pin has a head that prevents movement in the insertion direction when inserted into the insertion hole, a locking portion protruding from the insertion hole, and an insertion portion that stays in the insertion hole. A weak portion is formed in the locking portion, and after being inserted into the insertion hole together with the insertion pin, by pulling out the removal pin, the weak portion of the locking portion of the insertion pin is bent and deformed. From the insertion hole of the other member Only to prevent, characterized in that.

  According to the present invention, it is possible to prevent another member from falling out of the insertion hole only by pulling out the extraction pin.

  According to a second aspect of the present invention, in the fall prevention metal fitting according to the first aspect, the coupling means for coupling the distal end of the insertion pin and the distal end of the extraction pin is a detachable means.

  According to a third aspect of the present invention, in the fall-off prevention fitting according to the first or second aspect, a plurality of fragile portions are provided in the locking portion of the insertion pin, and the plurality of fragile portions are selectively provided according to the length of the insertion hole of another member. Wherein the fragile portion is bent.

  According to a fourth aspect of the present invention, in the fall prevention metal fitting according to any one of the first to third aspects, a head formed on the locking portion is formed of a separate member from the locking portion. The head is provided at a position corresponding to the length of the insertion hole of the other member of the locking portion.

  According to the invention of claim 1, after the insertion pin is inserted into the insertion hole together with the insertion pin, the weak portion of the locking portion is bent and deformed only by pulling out the extraction pin to prevent another member from falling out of the insertion hole. Therefore, the work can be performed with only one hand without the need for a tool, and thus the work can be performed simply and quickly. In addition, work can be performed safely and promptly even at high places such as work on power transmission lines.

  Further, when the pull-out pin is pulled out and disengaged from the insertion pin, the locking portion of the insertion pin becomes substantially perpendicular to the insertion portion, so that the insertion pin can be reliably prevented from falling out of the insertion hole. Conventionally, the bending of the tip of the split pin depends on the skill (feeling) of the installer, and there has been an accident that the split pin falls out of the insertion hole due to insufficient bending. According to this, it is possible to reliably prevent the insertion pin from being pulled out of the insertion hole only by pulling out the extraction pin, and to eliminate the human error as described above.

  According to the second aspect of the present invention, the connecting means for connecting the distal end portion of the insertion pin and the distal end portion of the punching pin is detachable means. Can be used.

  According to the third aspect of the present invention, a plurality of fragile portions formed in the locking portion of the insertion pin are provided, and the fragile portion is selectively bent according to the length of the insertion hole of the other member. Can be used to prevent the removal of a plurality of types of different members (shaft diameters differ in the case of bolts).

  According to the invention of claim 4, the head formed on the locking portion is formed of a member different from the locking portion, and the head is formed according to the length of the insertion hole of the other member of the locking portion. Since it is provided at a different position, it can be used to prevent a plurality of other members having different wall thicknesses (in the case of bolts, different shaft diameters) from coming off.

FIG. 2 is a perspective view illustrating the first embodiment of the present invention, in which the entirety of the fall prevention fitting is disassembled into an insertion pin and a removal pin. It is sectional drawing which shows the process (a)-(e) which attaches the fall prevention metal fitting of FIG. 1 to the insertion hole of a bolt. FIG. 9 is an enlarged sectional view of a main part showing the second embodiment. FIG. 14 is an enlarged sectional view of a main part showing a modification of the second embodiment. It is sectional drawing which shows Embodiment 3 of this invention and shows the process (a) (b) which attaches to a bolt with a large shaft diameter. It is sectional drawing which shows the process (a) (b) which attaches the fall prevention metal fitting of FIG. 5 to the bolt with a small shaft diameter. FIG. 13 is a perspective view showing the fourth embodiment of the present invention, in which the entirety of a fall prevention fitting is shown by disassembling an insertion pin and a removal pin. FIG. 13 is a perspective view showing the fifth embodiment of the present invention, in which an entirety of a fall prevention fitting is shown by disassembling an insertion pin and a removal pin. It is sectional drawing which shows the process (a) (b) which attaches the fall prevention metal fitting of FIG. 8 to an insertion hole.

  Hereinafter, the present invention will be described based on the illustrated embodiment.

(Embodiment 1)
FIG. 1 is a perspective view schematically showing a fall prevention fitting 1 according to the first embodiment, and FIGS. 2A to 2E illustrate a case where the fall prevention fitting 1 is attached to the tip of another member 15 (for example, a bolt). It is sectional drawing which shows the process of attaching to a part.

  The fall-off prevention fitting 1 is inserted into an insertion hole 16 formed at the tip of the bolt 15, and is bent substantially half of the entire length to prevent the bolt 15 from coming off. And the pull-out pin 3 which bends the insertion pin 2 by being pulled out from the insertion hole 16 after being inserted into the insertion hole 16.

  The insertion pin 2 is a cylindrical body whose outer diameter is slightly smaller than the inner diameter of the insertion hole 16 of the bolt 15 and has a length almost twice as long as the insertion hole 16. Used to be inserted into.

  The insertion pin 2 has a locking portion 4 that is bent at substantially the distal end side to prevent the insertion pin 2 from falling out of the insertion hole 2, an insertion portion 5 that remains in the insertion hole 16, and a base end of the insertion portion 5. And a head 6 provided in a flange shape are integrally formed.

  The center hole of the insertion pin 2 of the cylindrical body is an insertion hole 7 into which the above-mentioned extraction pin 3 is inserted.

  The engaging portion 4 of the insertion pin 2 is provided with a slit 8 over substantially the entire length except for the distal end.

  Concave portions are formed in the base end portion 9, the intermediate portion 10, and the distal end portion 11 of the slit 8 of the locking portion 4 of the insertion pin 2, and are formed as fragile portions that are easily bent. Further, the distal end 11 of the slit 8 is also the distal end 11 of the insertion hole 7 of the insertion pin 2, and the insertion hole 7 is closed.

  The punching pin 3 is slightly longer than the length of the insertion hole 7 of the insertion pin 2, and a ring 12 into which a finger of a human enters is integrally formed at a base end.

  Then, the punching pin 3 is inserted into the insertion hole 7 of the insertion pin 2, and the tip 13 of the extraction pin 3 is in contact with the tip 11 of the insertion hole 7. Are joined by welding to form the fall-off prevention fitting 1.

  The falling-off prevention fitting 1 configured as described above has a shape in which the locking portion 4 is bent in a rectangular shape so that the intermediate portions 10 and 10 of the slit 8 of the insertion pin 2 are expanded. As will be described later, the enlarged outer peripheral surface of the locking portion 4 is locked to the opening edge of the insertion hole 16 when a force is applied in a direction in which the locking portion 4 is pulled out with the locking portion 4 inserted into the insertion hole 16. That's why.

  A process of attaching the fall prevention fitting 1 to the insertion hole 16 of the bolt 15 will be described with reference to FIGS.

  FIG. 2A shows a state before the fall prevention fitting 1 is inserted into the insertion hole 16 of the bolt 15.

  FIG. 2B shows a state in which the fall prevention fitting 1 is inserted into the insertion hole 16 of the bolt 15. The distal end 11 of the fall prevention fitting 1 (the distal end 11 of the insertion pin 2) is inserted into the insertion hole 16 from one opening. As the insertion pin 2 is inserted into the insertion hole 16, the widened slit 8 of the locking portion 4 becomes narrower and can be inserted.

  FIG. 2C shows a state in which the fall prevention fitting 1 has been inserted into the insertion hole 16. The insertion of the falling-off prevention fitting 1 into the insertion hole 16 is completed when the head 6 of the insertion pin 2 comes into contact with the opening edge of the insertion hole 16. In this state, the locking portion 2 of the insertion pin 2 projects from the insertion hole 16, the slit 8 is expanded again, and the locking portion 4 is expanded.

  FIG. 2D shows a state in which the pull-out pin 3 of the fall prevention fitting 1 is pulled out from the insertion pin 2, and the locking portion 4 is bent and locked to the bolt 15. When the pull-out pin 3 is pulled in the direction of pulling out from the insertion pin 2, the distal end 11 of the insertion pin 2 and the distal end 13 of the pull-out pin 3 are connected, so that the distal end 11 of the locking portion 4 moves in the pull-out direction. Forces arise. At this time, the enlarged outer peripheral surface of the locking portion 4 is locked to the opening edge of the insertion hole 16, so that movement in the pulling-out direction is prevented, and the fragile portions 9, 10, 10, 11 formed in the slit 8 are broken. The bending and locking portion 4 further expands, and the insertion pin 2 is deformed into a T-shape to prevent the insertion pin 2 from falling out of the insertion hole 16.

  In the positions where the fragile portions 9, 10, 10, and 11 are formed, the interval between the fragile portions 10 and 11 is slightly longer than the interval between the fragile portions 9 and 10. This is because, by keeping such a length relationship, the angle formed between the insertion portion 5 and the portion locked by the bolt 15, that is, the portion between the weak portion 9 and the weak portion 10 becomes perpendicular. In addition, the insertion pin 5 can be reliably prevented from falling out of the insertion hole 16.

  The distal end portion 11 of the insertion pin 2 and the distal end portion 13 of the extraction pin 3 are coupled until the deformation of the locking portion 4 is completed, that is, the locking portion 4 is opened with respect to the insertion portion 5. It is so bent that it does not come off until the insertion pin 2 becomes T-shaped. Accordingly, when the pulling pin 3 is pulled in the pulling direction, the locking portion 4 is deformed substantially at right angles to the insertion portion 5, so that the locking portion 4 can be reliably prevented from falling out of the insertion hole 16.

  If the connection between the insertion pin 2 and the extraction pin 3 is loose, the extraction pin 3 separates from the insertion pin 2 in a state where the locking portion 4 is not sufficiently deformed, and the insertion pin 2 is T-shaped, that is, The locking part 4 does not form a right angle with the part 5. It is more preferable that the insertion pin 2 be formed in a T-shape in order to surely prevent the insertion pin 2 from dropping out of the insertion hole 16.

  FIG. 2E shows a state in which the pull-out pin 3 is further pulled in the pull-out direction from the state where the insertion pin 2 is attached to the insertion hole 16 in a state where the insertion pin 2 is prevented from coming off, and is separated from the insertion pin 2.

  The detaching pin 3 can be relatively easily detached from the insertion pin 2 by twisting the extraction pin 3 with respect to the insertion pin 2 in the state shown in FIG. Since the connection between the distal end portion 11 of the insertion pin 2 and the distal end portion 13 of the punching pin 3 is performed by welding in a relatively small area, welding can be relatively easily broken only by twisting the punching pin 3.

  The operation of attaching such a fall prevention fitting 1 to the insertion hole 16 of the bolt 15 can be performed with almost one hand.

  That is, the user can grasp the drop-off prevention fitting 1 with one hand, insert the tip 11 of the insertion pin 2 into the insertion hole 16 of the bolt 15, and then pull out the pull-out pin 3 to complete the mounting work. There is no need to use Therefore, work can be performed safely even at high places such as work on power transmission lines.

(Embodiment 2)
FIG. 3 is an enlarged cross-sectional view showing a main part of the second embodiment. In the second embodiment, the connection between the insertion pin and the pull-out pin is made removable.

  A small screw hole 22a that penetrates in the axial direction is formed at the tip of the insertion pin 22 of the fall prevention metal fitting 21, and a small screw 23a is formed at the tip of the removal pin 23.

  Such a fall prevention metal fitting 21 is formed by screwing a small screw 23a of a removal pin 23 into a small screw hole 22a at the tip of the insertion pin 22, and connecting the two.

  When the fall prevention metal fitting 21 is attached to the insertion hole 16 of the bolt 15, the following procedure is performed. First, the stopper fitting according to the first embodiment is inserted until the stopper fitting 21 is inserted into the insertion hole 16 and the pulling pin 23 is moved in the pulling direction to bend the locking portion so that the whole is deformed into a T-shape. Same as 1.

  Then, the detachment of the connection from the insertion pin 22 of the removal pin 23 rotates the removal pin 23 in a direction in which the screw is released.

  Thereby, the removal pin 23 can be easily separated from the insertion pin 22. In addition, since the connection between the extraction pin 23 and the insertion pin 22 is performed by a detachable means, the extraction pin 23 can be connected to another insertion pin 22 without breaking the extraction pin 23 and the insertion pin 22. Can be reused.

  FIG. 4 is a cross-sectional view showing another example of Embodiment 2 (meaning means for detachably connecting the insertion pin and the removal pin), in which main parts are enlarged.

  A locking claw 26a is formed inside the distal end portion of the insertion pin 26 of the fall-off preventing bracket 25, and a locking claw 27a that engages with the locking claw 26a is formed on the distal end portion of the pullout pin 27, respectively.

  The latching claw 26a of the insertion pin 26 and the latching claw 27a of the pullout pin 27 are engaged by rotating the pullout pin 27 and changing its direction, or disengaged. .

  When the fall prevention metal fitting 25 is attached to the insertion hole 16 of the bolt 15, the following procedure is performed. First, the stopper metal fitting according to the first embodiment is inserted until the stopper part 25 is inserted into the insertion hole 16 and the pulling pin 27 is moved in the pulling-out direction to bend the locking portion so that the whole is deformed into a T-shape. Same as 1.

  Thereafter, the engaging pin 27 is rotated to release the engagement between the locking claws 26a, 27a.

  Thereby, the removal pin 27 can be easily detached from the insertion pin 26. In addition, since the connection between the extraction pin 27 and the insertion pin 26 is performed by a detachable means, the extraction pin 27 can be connected to another insertion pin 26 without breaking the extraction pin 27 and the insertion pin 26. Can be reused.

(Embodiment 3)
FIGS. 5 and 6 are cross-sectional views showing a fall prevention fitting 31 according to the third embodiment. The third embodiment can be used for any of the bolts 15 and 15a having different shaft diameters. is there. 5 (a) and 5 (b) show a process of attaching to a bolt 15 having a large shaft diameter, and FIGS. 6 (a) and 6 (b) show a process of attaching to a bolt 15a having a small shaft diameter.

  The insertion pin 32 of the fall-off prevention fitting 31 is formed so that approximately 1/5 of the entire length thereof is formed as the insertion portion 35 and approximately 4/5 of the entire length is formed as the locking portion 34. The locking portion 34 excludes the tip portion 41. A slit 38 is formed in the portion.

  Four concave portions are formed inside the slit 38 from the base end toward the distal end, and become a first weak portion 39, a second weak portion 40, a third weak portion 42, and a fourth weak portion 43. I have. Further, the distal end portion 41 of the locking portion 34 is a coupling portion to which the distal end portion 13 of the punch pin 3 is coupled. The connection between the distal end portion 41 of the locking portion 34 and the distal end portion 13 of the punch pin 3 is performed by welding as in the first embodiment.

  However, when the fall prevention metal fitting 31 is attached to the bolt 15 having a relatively large shaft diameter, when the insertion pin 32 is inserted into the insertion hole 16, the opening edge of the insertion hole 16 is positioned near the second weak portions 40, 40. Is done. When the pulling pin 3 is pulled in the pulling-out direction from this state, the outer peripheral surfaces of the second fragile portions 40 and 40 of the locking portion 34 are locked in the insertion holes 16, and the movement in the pulling-out direction is prevented. The fragile portions 40, 40 and the fourth fragile portions 43, 43 are bent to deform the insertion pin 32 into a substantially T-shape, thereby preventing the insertion pin 32 from falling out of the insertion hole 16.

  Next, when the fall-off prevention fitting 31 is attached to the bolt 15a having a relatively small shaft diameter, when the insertion pin 32 is inserted into the insertion hole 16a, the opening edge of the insertion hole 16a is positioned near the first fragile portions 39, 39. Is done. When the pulling pin 3 is pulled in the pulling-out direction from this state, the outer peripheral surfaces of the first fragile portions 39, 39 of the locking portion 34 are locked in the insertion holes 16a, and the movement in the pulling-out direction is prevented, and The fragile portions 39, 39 and the third fragile portions 42, 42 are bent to deform the insertion pin 32 into a substantially T-shape, thereby preventing the insertion pin 32 from falling out of the insertion hole 16.

  By forming a plurality of fragile portions 39, 40, 42, 43,... In the slit 38 of the insertion pin 32 in this manner, the bolts 15 and 15a having different shaft diameters can be used to prevent the bolts 15 and 15a from coming off.

(Embodiment 4)
FIG. 7 is a perspective view schematically showing a fall prevention fitting 51 according to the fourth embodiment. In the fall prevention fitting 51 according to the fourth embodiment, the head of the insertion pin 52 is formed integrally with the insertion portion. The bolts 15 and 15a have different shaft diameters and are formed separately from each other.

  A plurality of annular grooves 56, 56,... Are formed on the outer peripheral surface of the insertion portion 55 of the insertion pin 51 of the fall prevention metal fitting 51, and the E-ring 58 is fitted into any of these annular grooves 56, 56,. To use. The E-ring 58 functions as a head for preventing further insertion by contacting the opening edge of the insertion hole 16 when the fall prevention metal fitting 51 is inserted through the insertion hole 16 of the bolt 15.

  Thus, by selecting the annular groove 56 into which the E-ring 58 is fitted in accordance with the shaft diameter of the bolt 15, it can be used to prevent the bolts 15 and 15a having different shaft diameters from coming off.

(Embodiment 5)
8 and 9 show a fall prevention fitting 61 according to the fifth embodiment. FIG. 8 is a perspective view schematically showing the fall prevention fitting 61, and FIGS. 9 (a) and 9 (b) show the fall prevention fitting 61. FIG. 6 is a cross-sectional view showing a step of attaching the cable to the insertion hole 16 of the bolt 15.

  In the fifth embodiment, the insertion pin 62 has a shape obtained by dividing the insertion pin 2 of the cylindrical body described in the first embodiment into two in the axial direction.

  More specifically, the insertion pin 62 of the fall prevention metal fitting 61 has a shape obtained by cutting a cylindrical body whose outer diameter is slightly smaller than the inner diameter of the insertion hole 16 of the bolt 15 in the axial direction into two parts at its axis. I have.

  The locking portion 64, the insertion portion 65, and the head 66 of the insertion pin 62 also have a semicircular cross-sectional shape, and an insertion groove 67 having a semicircular cross-section is formed on the upper surface of the insertion pin 62. I have.

  Recesses 69 and 70 extending in the width direction are respectively formed in the locking portion 64 of the insertion pin 62 to form weak portions. The locking portion 64 is bent in a direction in which the recess 69 is slightly opened, and the recess 70 is slightly narrowed. It is formed in a character shape without being flat as a whole.

  Then, the removal pin 3 is fitted into the insertion groove 67, and the distal end portion 13 of the removal pin 3 and the distal end portion 71 of the insertion pin are joined by welding to form the falling-off prevention metal fitting 61.

  The state in which the punching pin 3 is fitted in the insertion groove 67 corresponds to the state in which the insertion pin and the pulling pin in claim 1 are arranged in parallel.

  When attaching the thus-prevented metal fitting 61 to the insertion hole 16 of the bolt 15, first insert the metal fitting 61 until its head 66 comes into contact with the opening edge of the insertion hole 16 (FIG. 9). (A)). In this state, the fragile portion 69 is close to the opening edge of the insertion hole 16 on the side where the locking portion 64 protrudes.

  Next, when the pull-out pin 3 is pulled in the pulling-out direction, the outer peripheral surface of the fragile portion 69 of the locking portion 64 of the insertion pin 62 comes into contact with the opening edge of the insertion hole 16 to prevent its movement, and the fragile portion 69 is bent.

  Further, when the pulling pin 3 is pulled in the pulling-out direction, the locking portion 64 is bent substantially in an L shape, and the connection (welding) between the tip of the pulling pin 3 and the tip of the locking portion 64 is broken (FIG. 9 ( b)), the insertion pin 64 prevents the insertion.

  The embodiment of the present invention has been described above. However, the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like within a range not departing from the gist of the present invention, the present invention is not limited thereto. include.

  Further, although the present invention is referred to as a fall prevention fitting, it is not limited to a metal material, but may be a synthetic resin material such as plastic.

DESCRIPTION OF SYMBOLS 1 Fall prevention metal fitting 2 Insertion pin 3 Pullout pin 4 Locking part 5 Insertion part 6 Head 7 Insertion hole 8 Slit 9 Concave part (fragile part)
10 recesses (fragile parts)
11 Tip of insertion pin (fragile part)
13 Tip of the pin 15 Bolt (other member)
16 Insertion hole 21 Fall prevention metal fitting 22 Insertion pin 22a Small screw hole (coupling means)
23 operation pin 23a small screw (coupling means)
25 Fall prevention metal fitting 26 Insertion pin 26a Engagement claw (coupling means)
27 Removing Pin 26a Engaging Claw (Coupling Means)
15a bolt (other members)
16a Insertion hole 31 Drop-off prevention fitting 34 Locking part 35 Insertion part 36 Head 38 Slit 39 Fragmented part 40 Fragmented part 41 Tip 42 of insertion pin Fragmented part 43 Fragmented part 51 Fall-off prevention fitting 54 Locking part 55 Insertion part 57 Insertion Hole 58 E-ring (head)

Claims (4)

A fall prevention metal fitting that is inserted into an insertion hole of another member and deforms a portion protruding from the insertion hole to prevent the member from falling out of the other member,
At the same time, it consists of an insertion pin and a removal pin inserted into the insertion hole,
In a state where the punching pin is inserted into the insertion hole of the insertion pin, or in a state where the insertion pin and the pulling pin are arranged in parallel, the distal ends of the insertion pin and the pulling pin are connected by a connecting means,
The insertion pin has a head that prevents movement in the insertion direction when inserted into the insertion hole, a locking portion protruding from the insertion hole, and an insertion portion that stays in the insertion hole,
A fragile portion is formed in the locking portion,
By pulling out the removal pin inserted through the insertion hole together with the insertion pin, the fragile portion of the locking portion of the insertion pin was bent and deformed to prevent other members from falling out of the insertion hole,
A fall prevention fitting characterized by the following. A coupling means for coupling the distal end of the insertion pin and the distal end of the extraction pin is a detachable means,
The fall prevention metal fitting according to claim 1, wherein:   A plurality of fragile portions are provided in the locking portion of the insertion pin, and the fragile portions are selectively bent according to the length of an insertion hole of another member. The fall prevention metal fitting of any one of the above. The head formed in the locking portion is formed of a separate member from the locking portion, and the head is provided at a position corresponding to the length of the insertion hole of the other member of the locking portion,
The fall-off prevention fitting according to any one of claims 1 to 3, characterized in that:

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