JP2572819Y2 - Screw grommet - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw grommet for interconnecting a plurality of panels by screwing a screw into a hollow shaft.

[0002]

2. Description of the Related Art A screw grommet for interconnecting a plurality of panels by screwing a screw into a hollow shaft is known. Japanese Utility Model Publication No. 54-22839 discloses a screw grommet provided with a thick flange, a shaft portion below the flange, and an anchor leg type locking claw extending from the shaft portion to the flange side. In this screw grommet, the first panel is supported between the screw and the flange by screwing the screw from the flange to the shaft portion, and the anchor claw is inserted into the second panel by inserting the anchor leg-type engagement claw. Both panels are interconnected by being supported between the lower surface of the flange.

[0003]

In the above screw grommet, the support of the first panel can be firmly carried out by tightening the screws, but the support of the second panel is made of anchor-type locking claws, so that the support is firm. Not something. Therefore, the panels could not be firmly connected. Further, in the above screw grommet, since the two panels are connected with the flange interposed therebetween, the panels cannot be connected in a state of being in close contact with each other.

[0004] Accordingly, an object of the present invention is to provide a screw grommet capable of firmly and closely connecting panels to each other.

[0005]

According to the present invention, in order to achieve the above object, according to the present invention, a main body member having a flange and a hollow shaft portion is housed in the hollow shaft portion so as to slide in the axial direction but not rotate. A locking member that slides in a shaft portion of the main body member, the cylindrical portion having a hole formed in the axial direction, and a locking extending from the cylindrical portion to the flange side of the main body member. An opening is formed in the shaft of the main body member to project the tip of the locking claw outward, and the locking claw has a spring property in which the tip of the locking claw projects outward from the opening. When the screw inserted toward the shaft portion is screwed into the cylindrical portion of the locking member and the locking member is slid to the flange side, the locking claw protrudes outward from the opening of the main body member shaft portion. Lock the panel, abut the panel against the flange, and reverse the screw When allowed to slide away the locking member from the flange, the engagement pawl being adapted to disengage the engagement between the panel is pulled into the body member shaft portion side,
A screw grommet is provided in which the locking member has a thin cylindrical portion connected to the shaft with the locking claw slightly protruding from the shaft of the main body member.

[0006]

With the above screw grommet, the panels can be firmly and closely connected to each other simply by inserting the grommet shaft and rotating the screw in a state where the panel is in close contact. The connection can be easily disengaged, and re-use is only required to rotate the screw through the grommet shaft. And, since the cylindrical portion is thinly connected to the shaft portion with the locking claw slightly protruding from the shaft portion of the main body member, when the locking claw is inserted into the mounting hole of the panel, After the locking claw is retracted from the shaft portion, it comes out and engages with the back surface of the panel, whereby the panel can be temporarily fixed without using a screw, and further, the locking member and the main body member are integrally formed. This facilitates handling of the screw grommet.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show the screw grommet 1 according to the present invention, and FIGS. 7 to 9 show how the panels are connected to each other using the screw grommet 1.

1 to 6, a screw grommet 1 according to the present invention is made of plastic and a flange 2 is provided.
A main body member 4 having a hollow shaft portion 3; and a locking member 5 housed in the hollow shaft portion 3 so as to be slidable in the axial direction but not to rotate. As is apparent from FIGS. 3 and 4, the hollow shaft portion 3 is formed in a rectangular tube so as not to rotate with respect to the mounting hole of the panel to be connected, and is slidably housed therein. The member 5 is also formed in a rectangular tube so as not to rotate with respect to the hollow member 3. These shapes may be arbitrary as long as they do not rotate.

As shown in FIGS. 5 and 6, the locking member 5 has a cylindrical portion 6 which slides inside the body member shaft 3.
And a locking claw 7 extending from the cylindrical portion 6 to the flange 2 side. The outer shape of the cylindrical portion 6 is formed in a square tube,
A hole 8 into which a screw is screwed is formed in the shaft center. As shown in FIG. 5, a pair of locking claws 7 are formed on the upper part of the cylindrical portion 6 to obtain a high locking effect, and as shown in FIG. 6 and have a complementary shape with a half width to facilitate the formation of each locking claw. Further, each locking claw 7 has a locking surface 9 at its tip for locking to a corner of the panel,
Each locking claw 7 is formed with a hinge at the cylindrical portion 6, and a locking surface 9 of the locking claw is formed in this portion by the main body member shaft portion 2.
The spring is provided so as to protrude outside.

An opening 11 is formed in the shaft portion 2 of the main body member 4 so as to project the locking surface 9 at the tip of the locking claw 7 to the outside. The opening 11 is formed to have a size including two locking claws 7 so as to be convenient for molding the locking claws 7. Through the opening 11, the locking surface 9 at the tip of the locking claw 7 projects outward due to the nature of the spring described above. In the locking member 5, the cylindrical portion 6 is connected to the shaft portion 3 by a thin portion 12 with the locking claw 7 locking surface 9 protruding from the main body member shaft portion 3.
By this connection, since the main body member 4 and the locking member 5 can be handled integrally, one of the members is not lost, so that the management becomes easy and the handling becomes easy.

In the center of the flange 2, there is a hole 14 for passing a screw.
A ring-shaped protrusion 15 is formed around the hole 14 so that the screwed-in screw head is tightly sealed. Further, a short claw 16 that protrudes radially inward is formed in the screw hole 14, so that the inserted screw can be temporarily fixed.

The screw grommet 1 having such a configuration
The operation of interconnecting two panels with each other will be described. First, as shown in FIGS. 7A and 7B, a packing 18 is provided on the lower surface of the flange 2, and a screw 19 is manually inserted from above the flange 2. In this state, the screw 19 is not screwed into the hole 8 of the locking member tubular portion 6. However, the claw 1 provided in the hole 14 of the flange 2
6 temporarily engages the screw 19 by engaging the shaft of the screw 19.

After the screws 19 are temporarily fixed, as shown in FIG.
With the first panel 21 and the second panel 22 in close contact with each other,
The shaft 3 of the screw grommet 1 is pushed into the mounting hole 23. By this pushing, the shaft portion 2 passes through the mounting hole 23, the locking claw 7 is also tilted inward, passes through the mounting hole, and the flange 2 comes into contact with the surface of the first panel 21. Then, the locking surface 9 of the locking claw 7 comes out of the shaft portion 2 again by the spring property of the locking claw. Thus, the preparation for engaging the locking claw 7 with the back surface of the second panel 22 is completed. Next, when the screw 19 is screwed into the cylindrical portion 6, the locking member having the cylindrical portion 6 and the locking claw 7 is slid toward the flange 2. The slide breaks the thin portion 12 of FIG. Screw 1
By rotating 9 and pulling up the cylindrical part 6,
While the locking claw 7 extends outward from the opening 11 of the shaft portion 2,
The second panel 22 is brought into close contact with the first panel 21 by being strongly locked to the panel 22, and the first panel 21 is brought into contact with the lower surface of the flange 2 via the packing 18.

When removing the screw grommet 1,
The screw 19 is reversed to slide the tubular portion 6 of the locking member away from the flange 2. Thereby, the locking claw 7 is pulled inward of the main body member shaft portion 2, and the locking of the locking claw 7 with the second panel 22 is released. This state is shown in FIG. As is clear from this figure, the screw grommet 1 has a straight cylindrical body with a shaft portion, and can be pulled out as it is. Thereafter, in the case of re-use, the screw 19 is rotated forward, and the tubular portion 6 may be slid so as to be pulled up. In this case, although the thin portion 12 has already been broken, the screw 19 connects the locking member to the main body member, and the ease of management is not impaired.

[0015]

According to the screw grommet of the present invention, the panels can be firmly and closely connected to each other simply by inserting the grommet shaft and rotating the screw with the panels in close contact with each other. By reversing the screw, the connection can be easily released, and re-use can be made simply by turning the screw through the grommet shaft. When the screw grommet is inserted into the mounting hole of the panel, since the cylindrical portion is thinly connected to the shaft with the locking claw slightly protruding from the shaft of the main body member, the locking member is engaged. After the pawl is retracted from the shaft portion, it comes out and engages with the back surface of the panel, whereby the plurality of panels can be temporarily fixed without using screws, and furthermore, the main body member and the locking member are integrated. Can be handled, and one member is not lost, so that the management becomes easy and the handling becomes easy.

[Brief description of the drawings]

FIG. 1 is a front view of the screw grommet according to the present invention.

FIG. 2 is a plan view of the screw grommet according to the present invention.

FIG. 3 is a bottom view of the screw grommet according to the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a sectional view taken along line BB of FIG. 1;

FIG. 6 is a sectional view taken along line CC of FIG. 2;

FIG. 7 shows a state in which a packing is attached to the screw grommet according to the present invention and a screw is inserted, and FIG.
Is a front view thereof, and (B) is a sectional view taken along line DD of (A).

FIG. 8 is a cross-sectional view showing a state where panels are connected using the screw grommet according to the present invention.

FIG. 9 is a cross-sectional view showing a state in which the screw grommet according to the present invention is disconnected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screw grommet 2 Flange 3 Shaft part 4 Main body member 5 Locking member 6 Shaft part 7 Locking claw 8 Hole 9 Locking surface 11 Opening 12 Thin part 14 Hole 15 Ring-shaped protrusion 16 Claw 18 Packing 19 Screw 21, 22 Panel

Claims (1)

(57) [Scope of request for utility model registration] 1. A screw grommet for connecting a plurality of panels to each other by screwing a screw into a hollow shaft portion, wherein a body member having a flange and a hollow shaft portion slides in the hollow shaft portion in an axial direction. A locking member housed so as to be able to rotate, but not rotatable. The locking member slides in a shaft portion of the main body member, and includes a cylindrical portion having a hole formed in the axial direction, and a cylindrical portion. A locking claw extending to the flange side of the main body member, an opening is formed in the body member shaft portion to project the tip of the locking claw outward, and the tip of the locking claw extends outward from the opening. When the screw inserted from the flange of the main body member toward the shaft portion is screwed into the cylindrical portion of the locking member and the locking member is slid to the flange side, the locking is performed. Claws are extended outward from the opening of the body member shaft Then, the panel is brought into contact with the flange, the panel is brought into contact with the flange, the screw is reversed, and the locking member is slid away from the flange. it so engaging is out of the
The locking member has a locking claw slightly from the shaft portion of the main body member.
When it comes out, make sure that the cylindrical part is thinly connected to the shaft.
Screw grommet characterized by the following .