JPH0720408Y2 - Lock pin attachment - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a fixture for a locking pin protruding from a plate-shaped fixing portion when a lateral impact or large force is applied to the locking pin. .

[Conventional technology]

Conventionally, there are various kinds of attachments that can be attached to the attachment holes opened in the plate-shaped fixing portion only by fitting work. For example, a locking pin is embedded in the central portion and the attachment holes opened in the plate-shaped fixing portion around the periphery. A synthetic resin fitting with an annular groove that fits the rim of the mounting hole, and elasticity that has claws that engage with the back surface of the rim of the mounting hole are formed on both sides of the buried portion that is inserted into the mounting hole. There is provided a fixture having an engaging piece projecting therefrom.

[Problems to be solved by the device]

However, in the case where the peripheral groove is formed, when it is made of hard synthetic resin, the depth of the groove is set to be shallow from the viewpoint of mounting work and a sufficient engaging part is not formed, and the soft synthetic resin is used. In the case of resin, the groove can be set deep, but the rigidity of the material itself is poor, and in the case where the engaging pieces are provided on both sides, it is not possible to increase the strength to give elasticity to the engaging pieces. In either case, there is a problem in that, when an impact force or a large force is applied to the locking pin from the side, the locking pin comes off from the plate fixing portion.

In view of the above-mentioned situation, the present invention is to solve the problem by providing an attachment tool that can be attached to an attachment hole opened in a plate-shaped fixing portion only by a fitting operation, and an impact force applied to a locking pin from a specific direction. Another object of the present invention is to provide a fitting for a locking pin that does not easily come off from the mounting hole even when a large force is applied.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a mounting structure in which a locking pin is provided on the surface of a plate-shaped fixing portion so as to have a locking pin in the center and a plate around the locking pin. Forming a flange portion abutting on the surface of the rim of the mounting hole opened in the fixed portion, and extending a buried portion to be inserted into the mounting hole on the back surface of the flange portion, and one side of the buried portion. An arm portion that abuts the back surface of the plate-shaped fixing portion is provided in a projecting manner, and the other side extends diagonally laterally from the outer surface of the insertion end portion of the buried portion into the notch formed in the flange portion and the tip portion A laterally elastic engaging piece is formed integrally with an outwardly protruding claw that engages with the rear surface of the rim of the mounting hole, and the tip of the engaging piece is plate-shaped fixed from the notch. The fitting for the locking pin, which is made to face the front side through the mounting hole of the section, was constructed.

[Action]

The fitting of the locking pin of the present invention having the above contents,
At the same time as inserting the buried part of the mounting fixture in the inclined state into the mounting hole opened from the arm part to the plate-shaped fixing part and rotating the mounting part to bring the arm part into contact with the back surface of the plate-shaped fixing part, The engaging piece on the side is pushed inward by the rim of the mounting hole and is sunk inward, and is restored by the elastic force after the claw portion of the engaging piece has passed, and the claw portion is the rear surface of the rim portion of the mounting hole. And the flange portion comes into contact with the surface of the rim portion in a mounted state. In this attached state, when an impact force or a large force is applied to the locking pin from a specific lateral direction, that is, the protruding direction of the arm portion, the locking pin receives a rotational force, but the arm portion and the flange portion Since no external force acts on the engaging piece, the mounting strength in the specific direction is high. Further, a claw portion that extends obliquely laterally from the outer surface of the insertion end of the buried portion into the notch formed in the flange portion and that protrudes outward of the tip end portion that engages with the rear surface of the rim portion of the mounting hole is provided. The engaging piece having lateral elasticity is integrally formed, and the tip end portion of the engaging piece is made to face the surface side from the notch through the mounting hole of the plate-shaped fixing portion. The outer surface of the plate slides while pushing the rim of the mounting hole of the plate-shaped fixing part inward, and when removing it, through the notch of the flange part, it engages the surface facing from the mounting hole of the plate-shaped fixing part. This is done by pushing and bending the tip of the joint piece toward the locking pin, and pulling it out while rotating the fixture.

〔Example〕

The present invention will be further described in detail with reference to the embodiments shown in the accompanying drawings.

1 and 2 show a typical embodiment of a fitting for a locking pin of the present invention, in which 1 is a locking pin and 2 is a plate-shaped fixing portion 3 with the locking pin 1 fixed. The fixtures to be attached to each are shown.

The locking pin 1 is a metal rod, and is a shaft for releasably relating to a latch device to be described later or pivotally mounting other members in a state of protruding from the plate-shaped fixing portion 3. The use is not limited, such as being used as a body or simply mounting a shelf board or the like.

The fitting 2 press-fits and fixes a part of the locking pin 1,
It can be attached to the attachment hole 4 opened in the plate-like fixing portion 3 only by a fitting operation, and the locking pin 1 is provided in the central portion.
Has a hole 5 for press-fitting, and a flange portion 7 that abuts the surface of the rim portion 6 of the mounting hole 4 is formed around the hole 5, and is inserted into the mounting hole 4 on the back surface of the flange portion 7. The buried portion 8 is extended, and the plate-shaped fixing portion 3 is provided on one side of the buried portion 8.
The arm portion 9 that abuts the back surface of the
Is provided so as to project to the side orthogonal to the axis of, and an engaging piece 10 having lateral elasticity is integrally formed on the other side.
On the outer side of the tip end portion 11 of the above, a claw portion 12 having a beveled tip side surface that engages with the back surface of the rim portion 6 of the mounting hole 4 is projected, and the tip end portion 11 of the engaging piece 10 is It faces the notch 13 formed in the flange portion 7.

More specifically, the hole 5 is formed at a position closer to one side of the substantially square flange portion 7, is formed through the buried portion 8 or leaves a bottom portion, and a reinforcing ring is formed at the edge of the flange portion 7.
14 is provided to increase the mounting strength against the rotational force acting on the locking pin 1. In this embodiment, the locking pin 1
Although it is press-fitted into the hole 5 in the above, the locking pin 1 can be formed integrally with the fixture 2. Further, the arm portion 9 extends laterally from the side provided with the hole 5 on one side, and the tip end portion thereof has a flat convex surface 15 that comes into contact with the back surface of the plate-shaped fixing portion 3.
To form an arcuate surface 16 from the tip of the convex surface 15 to the outer surface of the buried portion 8, and to facilitate insertion into the mounting hole 4 with a concave portion 15 ′ that is located on the base end side of the convex surface 15. There is.
Due to the existence of the recess 15 ', it is possible to absorb the droop on the back side of the rim portion 6 that occurs when the mounting hole 4 is punched in the plate-shaped fixing portion 3. Further, the engaging piece 10 extends obliquely laterally from the outer surface of the insertion end portion of the buried portion 8 into the notch 13 formed in the flange portion 7, and the tip portion 11 extends from the notch 13 to the plate-shaped fixing portion 3. The front side is exposed through the mounting hole 4. Then, the side surface of the tip portion 11 and the entire claw portion 12 are slightly protruded laterally from the contour line of the buried portion 8 and are fitted in the mounting hole 4, and the tip portion 11 of the engaging piece 10 is The rim portion 6 is pressed laterally. The presence of the notch 13 is for integrally molding the fixture 2 and imparting elasticity to the engaging piece 10. Here, in this embodiment, the fixture 2 is made of a highly rigid material such as polyacetal resin. Here, the extended surface of the back surface of the flange portion 7, the convex surface 15 of the arm portion 9 and the claw portion of the engaging piece 10
The distance between the tip end side sloped surface 12 and the thickness of the plate-shaped fixing portion 3 is made equal or the former is set to be slightly smaller.

Then, in order to mount the mounting tool 2 in a state in which a part of the locking pin 1 is press-fitted and fixed in the hole 5, to mount the mounting pin 4 in the mounting hole 4 of the plate-shaped fixing portion 3, as shown in FIG. While the mounting fixture 2 is inclined, it is inserted into the mounting hole 4 from the arm portion 9 and the tip of the arm portion 9 is entirely rotated in a direction approaching the back surface of the plate-shaped fixing portion 3. Then, the convex surface 15 of the arm portion 9 comes into contact with the back surface of the plate-shaped fixing portion 3, and at the same time, the outer surface of the engaging piece 10 slides on the other side of the rim portion 6 of the mounting hole 4, and finally the claw portion 12 is formed. Is overridden and the claw portion 12 has the rim portion 6
Engage the back side of. Thus, as shown in FIG. 4, the flange portion 7 abuts on the surface of the rim portion 6 of the plate-shaped fixing portion 3,
The convex surface 15 of the arm portion 9 abuts on the back surface of the plate-shaped fixing portion 3, and the claw portion 12 of the engaging piece 10 engages with the back surface of the rim portion 6 to sandwich the plate-shaped fixing portion 3 from the front and back. It is fitted in the state. It should be noted that when detaching from the plate-like fixing portion 3, it can be easily performed by bending the tip end portion 11 of the engaging piece 10 inward and pulling it out while rotating the fixture 2.

Further, as shown in FIG. 5, the shape of the mounting hole 4 is set to be trapezoidal in plan view, and accordingly, the cross-sectional shape of the base portion continuous with the flange portion 7 of the buried portion 8 of the mounting tool 2 is set to be trapezoidal. When the mounting tool 2 is mounted in the mounting hole 4, the mounting direction can be surely set.

An embodiment will be described below in which the present invention is used in combination with the latch 17 shown in FIG.

The latch 17 includes a movable body 18 and a main body case 19 that rotatably houses the movable body 18.

The movable body 18 is made of synthetic resin and is integrally molded.
A hook portion 21 is formed by projecting 0, 20 and extending to one side with respect to the support shaft 20, and a seesaw type operation is symmetrical near the other side with respect to the axis of the support shaft 20. A portion 22 is formed, and further, in a suitable place separated from the support shaft 20, in the illustrated example, a base portion of the hook portion 21 is integrally formed with a leaf spring-like spring portion 23 having a substantially Z shape in a side view, and the movable portion is formed. The spring portion 23 is sufficiently elastically deformed as the body 18 rotates.

The main body case 19 has an internal space 24 capable of accommodating the movable body 18.
The support shaft 2 in the vicinity of the openings of the opposite side walls 25, 25.
Axial holes 26, 26 for rotatably supporting the 0, 20 are formed, and spring receivers 27, 27 open to the opening side for guiding and supporting the tip of the spring portion 23 are formed therein. Guide recesses 28, 28 for receiving the locking pin 1 opened from the central portion of the side walls 25, 25 to the other side opposite to the shaft hole 26 are formed, and as shown in FIG. The locking pin 1 is surrounded by the hook portion 21 of the movable body 18. In addition, the inspection panel 29 shown in FIG.
As a structure for fixing to the mounting holes 30 opened at both side ends of the main body case 19, a flange portion 31 is provided so as to project at the periphery of the opening, and both side walls 25, 25 are provided on the rear surface of the rim of the mounting hole 30. An appropriate number of claw pieces 32, ... that are engaged with the retainer are provided. Then, move the movable body 18 from the hook portion 21 side to the main body case 19
Is inserted into the internal space 24, and the support shafts 20, 20 are rotatably fitted in the shaft holes 26, 26, and at the same time, the tip of the spring portion 23 is spring-loaded.
It is supported by 27 and 27, and the spring portion 23 constantly elastically biases the movable body 18 in the direction in which the hook portion 21 engages with the locking pin 1. FIG. 8 shows that the latch 17 is attached to the inspection hole of the inspection panel 29.
When the locking pin 1 is inserted into the guide recess 28 while opening the hook portion 21 while expanding the hook portion 21, the locking pin 1 passes through the tip of the hook portion 21, and then the spring portion is inserted. The elastic force of 23 restores the engaged state, and the one side of the operating portion 22 is pushed in to push the hook portion 21 against the elastic force of the spring portion 23 from the guide recess 28 of the main body case 19 to both side walls. It is set between 25 and 25, and the locking pin 1 is released.

The inspection panel 29 is a desk 33 as shown in FIGS. 10 and 11.
It is for closing the front surface of the wiring duct 36 installed in the space sectioned by the both leg plates 34, 34 and the curtain plate 35 so that it can be freely opened and closed. Locking pin 1 pivotally attached or detachably pivoted, and latches 17 attached to both sides of the upper end portion are projectingly provided on the leg plates 34, 34 via the fixture 2.
Related to. In addition, attach the lower end of the inspection panel 29 to the leg plate 34.
In the case of pivotal attachment to the same, the locking pin 1 is projected through the fixture 2 in the same manner as described above, and the locking pin 1 is rotatably received by the bearings 37 fixed to both sides of the lower end of the inspection panel 29. It is also possible.

Further, FIG. 9 shows another embodiment, in which an inspection panel 29 is provided with a holding piece 38 capable of elastically holding the locking pin 1 from above and below instead of the latch 17. As described above, the present invention is not limited to the application, and can be used for various applications as long as the locking pin 1 protruding from the plate-shaped fixing portion 3 is used.

Finally, as shown in FIG. 10, when the inspection panel 29 is used as a rear stop of the wagon 38 having a drawer, a rearward impact force acts on the locking pin 1. In this case, if the arm portion 9 of the fixture 2 is attached to the front, the above-mentioned impact force gives a rearward rotational force to the locking pin 1. Since it is supported by the flange portion 7, no external force acts on the engaging piece 10 which is weak in strength, and as a result, the strength against the impact force from this direction is high. For example,
For static stress from three directions shown by F ₁ , F ₂ and F ₃ in Fig. ₁ ,
When comparing the strength when attached to the plate-shaped fixing part 3,
F ₁ is 30 kgf (kg) or more, F ₂ is 15 kgf or more, F ₃ is
It has a breaking strength of 10 kgf or more, and the strength in a specific direction in which the arm portion 9 projects is significantly higher than the strength in other directions. The strength in the specific direction can be set as appropriate by changing the distance from the axis of the locking pin 1 of the arm portion 9 and the contact area of the convex surface 15.

[Effect of device]

According to the fitting for a locking pin of the present invention as described above, in the mounting structure in which the locking pin is projected on the surface of the plate-like fixing portion, the locking pin is provided at the center, A flange portion is formed around the pin that abuts the surface of the rim of the mounting hole opened in the plate-shaped fixing portion, and a recessed portion to be inserted into the mounting hole is provided on the back surface of the flange to extend the recessed portion of the recessed portion. On one side, an arm portion that abuts the back surface of the plate-shaped fixing portion is provided in a protruding manner, and on the other side, a claw portion that engages with the rear surface of the rim portion of the mounting hole is provided on the outside of the tip portion. Since an engaging piece having elasticity toward one side is integrally formed and the tip end portion of the engaging piece faces the notch formed in the flange portion, a part of the locking pin is press-fitted into the hole of the fitting. In this state, insert the tilted embedded part of the fitting into the mounting hole opened from the arm to the plate-shaped fixing part, and By simply turning the arm part, the arm part is brought into contact with the back surface of the plate-shaped fixing part, and at the same time, the claw part of the engaging piece on the other side is engaged with the back surface of the rim of the mounting hole, and the flange part It can be attached only by fitting work while it is in contact with the surface, and when an impact force or a large force acts on the locking pin from the protruding direction of the arm portion in this attached state, the force is the same as that of the arm portion. Since it can be supported by the flange portion and no external force acts on the weakly engaging piece, the attachment strength in the specific direction can be increased. In addition, the tip of the engaging piece facing the front side from the mounting hole of the plate-shaped fixing part through the notch of the flange part is pushed and bent toward the locking pin side, and it can be easily removed by pulling out while rotating the mounting tool. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a fitting of a locking pin according to the present invention, FIG. 2 is a side view of the same as seen from the engaging piece side, and FIG. 3 is a main part showing a state in which the fitting is attached to a plate-shaped fixing portion. Partial cross-section plan view of
FIG. 4 is a cross-sectional plan view of the main part with the same attachment, FIG.
The figure is a plan view of the mounting hole, FIG. 6 is an exploded perspective view of the latch, FIG. 7 is a perspective view of the inspection panel, and FIG. 8 is a partial vertical side view showing a state in which the latch is attached to the inspection panel. The figure is a vertical side view showing a state in which an inspection panel is attached by using a holding piece instead of a latch, FIG. 10 is a perspective view of a desk, and FIG. 11 is a vertical side view. 1: Locking pin, 2: Fixture, 3: Plate fixing part, 4: Mounting hole, 5:
Hole, 6: rim part, 7: flange part, 8: buried part, 9: arm part,
10: Engaging piece, 11: Tip part, 12: Claw part, 13: Notch, 14: Reinforcing ring, 15: Convex surface, 16: Arc surface, 17: Latch, 18: Movable body, 19:
Main body case, 20: support shaft, 21: hook part, 22: operating part, 23: spring part, 24: internal space, 25: side wall, 26: shaft hole, 27: spring receiver,
28: guide recess, 29: inspection panel, 30: mounting hole, 31: flange part, 32: claw piece, 33: desk, 34: leg plate, 35: curtain plate, 36: wiring duct, 37: bearing, 38: wagon.

Claims (1)

[Scope of utility model registration request] 1. A mounting structure in which a locking pin is provided on a surface of a plate-shaped fixing portion so that the locking pin is provided in a central portion, and the locking pin is opened around the locking pin. A flange portion that contacts the surface of the rim of the hole is formed, and a buried portion that is inserted into the mounting hole is extended on the back surface of the flange portion, and one side of the buried portion is the back surface of the plate-shaped fixing portion. An arm portion that abuts is projected, and on the other side, it extends obliquely laterally from the outer surface of the insertion end portion of the buried portion into the notch formed in the flange portion, and on the outer side of the tip end portion of the mounting hole. A laterally elastic engaging piece is formed integrally with a protruding claw portion that engages with the rear surface of the rim portion, and the front end of the engaging piece is passed from the notch through the mounting hole of the plate-shaped fixing portion. The fitting for the locking pin, which is characterized by facing the.