JPH0244896Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an automatic crimp nut fastening machine that is used to attach a crimp nut to a thin base material by caulking.

(Prior art and problems) When screwing to a base material such as a thin metal plate with a thickness of 0.5 to 1.0 mm, it cannot be attached with a normal nut, so a so-called crimp nut is used. Nuts are used.

Conventionally, as shown in Utility Model Application No. 60-131717, etc., a crimp nut is attached to a base material by buckling the middle of the cylindrical part of the crimp nut by tightening the screw using a hand-operated screw tightening tool. Generally, the base material is held between the locking flange at the tip of the cylindrical part and the bulging part by forming the base material.

However, since this method is performed by hand, there is a limit to the ability to apply strong fastening force to swage, and it is difficult to fasten a large number of crimp nuts in a continuous operation in a short period of time, resulting in poor workability. But there's a problem.

(Technical Problem) Therefore, the technical problem of the present invention is to make it possible to easily and quickly install a crimp nut in accordance with the specifications, powerfully and reliably using power instead of manual labor.

(Means for solving the problem) In order to solve the above technical problem, the present invention
This is a crimp nut fastening device that swells the middle of the cylindrical part of the crimp nut into a brim shape due to a buckling load to swage it against the base material.It is guided by a guide post 2 installed upright on a pedestal 1 and supported so that it can move up and down. The first lifting platform 10, its drive device 11, and the first
When the lifting platform 10 descends, the abutting piece 3 comes into contact with it at a fixed position, and the subsequent depression is performed by the first air cylinder 15 provided on the first lifting platform, and the return to the upward movement is performed by the spring 4. It consists of a second lifting platform 20 supported by the guide post 2 and a base 30 fixed to the bottom of the pedestal 1. A crimp nut is inserted into the second lifting platform 20 through a chute 5.
The base table is equipped with a material supply section 6 that feeds the material downward one by one, and a clamp 9 that has a spring 8 biased in the recessed direction so as to forcibly push out the fed crimp nut with a pushing rod 7 and grip it. 30 includes a retractable crimping core 12 that protrudes upward so as to fit into the cylindrical lower end opening of the crimp nut from below, and a crimping core 12 that pushes up this core to buckle the crimp nut between the pushing rod 7 and the core 12. A second air cylinder 16 that operates to apply a load is provided.

(Operation) The above technical means operates as follows. 1st
Figure 1 shows the state before crimping in which the material crimp nut N is inserted into the base material b.From this state, when a load is simultaneously applied to compress both the upper and lower ends of the cylindrical part m, as shown in Figure 12. The middle part of the cylindrical part buckles and protrudes like a flange, and the locking flange f at the upper end and the bulging part g pinch the base material b, and the crimp nut N is attached to the base material.
are installed integrally. By screwing together screws, bolts, etc. using the female threads d of the cylindrical portion, an appropriate object can be attached to the base material b by screwing.

The automatic crimp nut fastening machine of the present invention mechanically fastens the crimp nut N to the base material b.

1 to 6, when a crimp nut N serving as a material is fed into the chute 5, the crimp nut N is fed into the material supply section 6 of the second lifting platform 20 along an inclination or by the blowing force of air.

When the drive device 11 provided at the upper part of the pedestal 1 is operated and the piston 11a extends downward, it pushes the first elevating table 10, and the elevating table 10 moves toward the guide post 2.
Descend while being guided by.

When the first lifting platform 10 descends, the upper end 7
The pushing rod 7 supported by the point a also moves downward, and the lower end 7b pushes out the clip nut N of the material supply section 6 from the supply section 6 and forcibly pushes it into the clamp 9 to grip it. When the first lifting table 10 descends to a predetermined position, the contact piece 3 hits the second lifting table 20 and stops at that position. At the same time, the first air cylinder 15 provided in the first lifting platform 10 operates and the piston 15
a, and push the second elevating table 20 with the contact piece 3 to lower it until the positioning rod 25 touches the base table 30.

For this reason, the crimp nut N held by the clamp 9 is fitted into the tip protruding shaft portion 12a of the caulking core bar 12 that protrudes upward on the base 30, and continues to be held while being supported by the shoulder portion 12b. The core metal 12 is retracted against the bias of the push-down spring 13 and separated from the clamp 9.

Next, when the second air cylinder 16 provided on the base 30 acts and pushes up the piston 16a while supporting the core metal 12, the crimp nut N moves between the core metal 12 and the pushing rod 7 as shown in FIG. Since the cylindrical portion m is sandwiched between the cylindrical portions and compressed from above and below, a buckling load acts on the middle of the cylindrical portion m, and the bulging portion g protrudes into a flange shape as shown in FIG. By forming this bulge g, the base material b is compressed between the locking flange f at the upper end of the cylindrical portion m and the bulge g, and caulking is completed.

When the caulking is completed, the first air cylinder 11 acts to pull up the pushing rod 7. Then, spring 13
The core metal 12, which had been compressed and pushed in, is released and moves upward under the force of the spring, releasing the base material b from the base 30.

(effect) The present invention has the following unique effects.

The first and second elevating tables operate in sequence to feed the crimp nuts one by one, and the crimp nuts are strongly and reliably crimped against the base material, so crimping is performed fully automatically.

Compared to buckling caused by tightening screws, caulking is instantaneous by vertical compression, which makes the work faster and improves work efficiency.

Since the crimping force is applied mechanically, the accuracy can be kept constant and standards can be unified.

It can be easily used as a single unit or as a multi-stage type with multiple units arranged in parallel, and can be selected from small to large sizes according to the purpose of use.

It has a relatively simple structure, is durable, easy to implement, and has high practicality.

(Example) A preferred embodiment of the invention is shown below.

Although FIGS. 1 and 2 show the case where a single unit is incorporated into the fuselage 40, a plurality of units may be arranged in parallel to form a multistage type.

The crimp nuts N serving as the material are taken out one by one from an automatic feeding device 50 shown in FIG.

The automatic feeding device 50 feeds a large number of crimp nuts NN from an inclined gutter 51 to a receiving tray 52 in a row so as to flow downward, and each rotation of a rotary plate 53 in the receiving tray feeds a number of crimp nuts NN into a recess 54 on the periphery of each rotation. Receive the crimp nuts one by one at the chute opening 5a.
By applying compressed air to the chute opening through an air pipe 55, the crimp nuts carried to the chute opening 5a are fed into the supply section 6 through the chute 5 at once.

A drive device 1 that raises and lowers the first lifting platform 10
1, an air cylinder is provided in a downward direction on the upper shelf 1a of the pedestal 1, and a piston 11a that moves telescopically is connected to the first
It is connected to the lifting platform 10 of 1, so that it can be raised and lowered integrally.

Guide posts 2 are placed on the left and right with intervals,
This supports a first lifting table 10 and a second lifting table 20 so as to face each other vertically, and each lifts and lowers by sliding on the guide posts 2, 2 as a guide.

The first air cylinders 15 are provided as a pair of left and right on the first lifting platform 10.

The material supply section 6 of the second lifting platform 20 is a chute 5
The vertical hole 6b is provided so that the inclined passage 6a intersects with the vertical hole 6b in which the pushing rod 7 slides vertically, and when the pressing rod 7 is pulled upward, the vertical hole 6b is empty. When the received crimp nut N is pushed out from the lower end opening 6c at the lower end 7b by the push rod 7, the push rod 7 moves the crimp nut N through the passage 6a. Block to prevent further supply of crimp nuts.

The clamp 9 has two claw pieces 9a and 9b facing each other on the left and right, and the upper ends of the clamps 9a and 9b are connected to hinge pins 9c and 9d, respectively.
It is pivoted so that it can be opened and closed, and is normally biased in the closing direction by a spring 21 stretched between the left and right claw pieces 9a and 9b.

When grasping the crimp nut as a material with the clamp 9, force the crimp nut N from above the middle part of both claw pieces, and both claw pieces 9
a and 9b open to the left and right against the bias of the spring 21 to grip and hold it, and are thereafter held by the spring pressure.

The second air cylinder 16 is provided upwardly on the base 30 from below, and a plunger 16a moves by extension and contraction.The caulking core bar 12 is provided on the plunger 16a by applying a spring 13 from below.

A pedestal 1, first and second elevating tables 10 and 20, a base 30, and a drive device 1 disposed thereon.
The entire first class is made into one unit and installed in the fuselage 40.

A single unit to a plurality of units can be freely incorporated into the fuselage 40.

Each unit may be fixed immovably to the fuselage 40 or may be freely movable. 1st to 2nd
In the figure, 41 is a traversing rail fixed to the body 40 side, 42 is a traversing guide that supports and guides the pedestal 1 so that it traverses, and 43 is a traversing guide roller.

The base stand 30 is made to match the base 44 on the body 40 side.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, the first
The figure is a side view of the entire automatic crimp nut tightening machine of the present invention, Figure 2 is a front view of the same, Figure 3 is a side view of the main parts,
Figure 4 is a front view of the same, Figures 5 and 6 are further enlarged longitudinal sectional side views of the main parts, Figure 7 is a front view of the same, and Figure 8 is a cross-sectional plane seen from line A-A in Figure 7. Figure 9 is a sectional view of the main part showing the operating state when crimping is completed, Figure 10 is a plan view of the supply device, Figure 11 is a sectional view of the crimp nut before crimping, and Figure 12 is a sectional view of the crimp nut after it is crimped. FIG. 1... Frame, 2... Guide post, 3... Hit piece, 4... Spring, 5... Chute, 6... Material supply section, 7... Push rod, 8... Spring, 9... Clamp , 10... first lifting platform, 11... drive device,
12... Core metal for caulking, 13... Spring, 15...
First air cylinder, 16... second air cylinder, 20... second lifting platform, 30... base platform.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A crimp nut fastening device that swells the middle of the cylindrical part of the crimp nut into a brim shape under a buckling load to swage it against the base material, and includes a guide installed upright on a frame 1. A first lifting platform 10 guided by a post 2 and supported so as to be able to rise and fall freely
When the drive device 11 and the first elevating table 10 descends, the abutting piece 3 abuts at a fixed position, and the subsequent depression is performed by the first air cylinder 15 provided on the first elevating table, and then the first elevating table 10 is raised. The second elevating table 20 is supported by the guide post 2 so as to return with a spring 4, and the base table 30 is fixed to the bottom of the pedestal 1. a material supply section 6 that feeds the crimp nuts downward one by one through the crimp nuts 5; and a clamp 9 that has a spring 8 biased in the recessed direction so as to forcibly push out the crimp nuts that have been fed in with a push rod 7 and grip them.
The base 30 includes a retractable caulking core 12 that protrudes upward so as to fit into the cylindrical lower end opening of the crimp nut from below, and a pushing rod 7 that pushes up this core to move the crimp nut. Core metal 12
and a second air cylinder 16 that operates to apply a buckling load. (2) When the pushing rod 7 supplies the crimp nut to the material supply section, it is in the upper position to allow the crimp nut to pass through, but at the same time as it is pushed down, the first lifting platform 10 is pushed so as to close the supply port. The automatic crimp nut fastening machine according to claim 1, characterized in that the automatic crimp nut fastening machine operates in accordance with claim 1. (3) The automatic crimp nut fastening machine according to claim 1, wherein the crimping core metal 12 is biased by a spring 13 in a direction in which it projects upward so that it also serves to position the base material. .