JPH04220132A - Riveter - Google Patents

Abstract

PURPOSE:To provide a riveter having the hole drilling function for setting the rivet inserting hole to tighten the blind rivet together. CONSTITUTION:The riveter consists of a shaft 1, a rolling nut 2, a jaw mechanism 3, a head frame 4, a rotary driving power shaft 5, a clutch mechanism at the rear side which connects this rolling nut 2 to the driving power shaft 5 freely attachably/detachably, a tubular main frame 8, a front cover 9, a rear cover 10, and a clutch mechanism of the front side 11. After a blind rivet 40 providing a drilling blade 41 is inserted in a nose piece 39 of this riveter, the rotary driving power shaft 5 is properly driven with normal rotation or reverse rotation, so the hole drilling for inserting the rivet and the rivetting work can be executed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a riveter, and more particularly to a riveter having a punching function for forming a hole for inserting a blind rivet into a plate material to which the blind rivet is fastened.

0002

[Prior art] Conventional riveters include electric riveters,
Including air riveters and hand riveters, regardless of the complexity, simplicity or difficulty of operation, when riveting work is performed, for example, in the case of an electric riveter, first an electric drill is applied to the plate material. The rivet insertion hole is opened by a method such as the above, and then the rivet loaded in the riveter is inserted into the hole to perform the intended riveting operation.

0003

[Problems to be Solved by the Invention] As mentioned above, in the case of a conventional riveter, two operations are performed using two types of tools: drilling a hole in a plate material using a drilling tool such as an electric drill, and riveting operation using a riveter. Because of this, there is a problem that workability is poor and it is not possible to perform riveting work efficiently.This problem is further aggravated when working in high places with poor footing, and when changing two types of tools, the tool may be dropped. There is a danger that this may lead to unforeseen accidents.

[0004] In order to solve the above problems, the present invention
Although it is not yet known, first, the distal end side is connected to the jaw mechanism, a threaded rod is provided on the rear side, and a detent pin is inserted through the intermediate portion at an appropriate position across the axial direction, and both ends of the pin are connected. A shaft configured by protruding, a rolling nut screwed onto the rear end side of the shaft, a clutch mechanism that removably connects the rolling nut to the rotating power shaft, and a clutch mechanism fitted to the shaft. a cylindrical bearing frame having two long holes facing each other along the axial direction into which protrusions at both ends of the locking pin of the shaft are inserted; and a one-way clutch interposed in the bearing frame. and a cylindrical main frame which is fitted so that the bearing frame can be rotated in only one direction by the one-way clutch, and the main frame has a cylindrical main frame that is fitted so that the bearing frame can be rotated in only one direction by the one-way clutch, and the A deep bottomed hole is provided to enable the rotating shaft to retreat and the clutch mechanism to be disconnected, and a stopper is provided protruding from the inner peripheral surface of the tip end of the main frame to prevent rotation by moving the shaft forward and backward. We have successfully solved the above problems by developing and filing an application (Japanese Patent Application No. 185582/1999) on a riveter characterized by a structure in which the pin and the stopper can be detached from and engaged with each other.

However, in the subsequent test process, in the case of the above invention, it is easy to make a mistake in the insertion angle position of the rotation stop pin with respect to the shaft when assembling the riveter or during maintenance and inspection, and if this is done incorrectly, the rotation It has been confirmed that there is a serious problem in that riveting cannot be achieved because the protruding end of the stop pin cannot engage with the stopper and the shaft cannot move backward.

[0006] Furthermore, it has been confirmed that the above-mentioned detent pin has a small diameter and is therefore susceptible to impact, and is likely to break off when colliding with the stopper, and in this case as well, there is a problem in that riveting cannot be achieved.

The present invention was researched and developed with the aim of solving the above problems, and by adding several improvements to the above invention, it provides a riveter that can solve the above problems at once. The purpose is to

[0008]

[Means for Solving the Problems] As a means for solving the above-mentioned problems and achieving the above-mentioned objects, in the present invention, the distal end side is connected to a jaw mechanism, and a threaded rod portion is provided on the rear side,
and a shaft having a locking pin extending across the axial direction at a proper position in the middle portion, and having both ends of the pin protrude;
a rolling nut screwed onto the rear end of the shaft; a clutch mechanism on the rear side that removably connects the rolling nut to the rotary power shaft; a cylindrical bearing frame having two long holes facing each other along the axial direction into which protrusions at both ends of a rotation stopper pin are inserted; a front clutch mechanism fitted into the bearing frame; It is composed of a cylindrical main frame that is fitted onto the bearing frame with the front clutch mechanism interposed therebetween, and the front clutch mechanism is connected to the two elongated holes provided opposite to the bearing frame. A front clutch is provided with two elongated holes extending in the axial direction into which the protrusions at both ends of the locking pin are inserted, and which is biased toward the rear by a spring, and a main clutch that rotates at the same time as the main frame. It consists of a rear clutch that is integrally fitted to the frame, and a bottomed hole of a required depth is provided on the tip side of the rotary power shaft to allow the rotary shaft to retreat and the rear clutch mechanism to be disconnected. We have developed a riveter in which the front clutch and rear clutch of the front side clutch mechanism can be engaged and disengaged by forward and reverse rotation of the rotating shaft,
Adopted.

Further, in the present invention, in the riveter configured as described above, a clutch integrally formed on the tip end surface of the rotary power shaft and a movable clutch movable back and forth provided on the rear surface of the rolling nut are used. The riveter constituting the rear clutch mechanism and the rear clutch of the front clutch mechanism are directly or indirectly spring-biased forward by a spring member directly or indirectly disposed on the rear side. We developed and adopted a riveter consisting of each of the following.

0010

[Operation] In the riveter configured as described above, when the jaw 20 of the jaw mechanism 3 is in the open state as shown in FIGS. 1 and 14, the blind rivet 40 with the drill bit 41 at the tip After inserting into the jaw 20,
The main frame 8 is fixed by hand so that it does not rotate (the rear clutch 36 of the front clutch mechanism 11, which is integrally fitted to the main frame 8, is also fixed), and in this state, the rotary power shaft 5 is connected to the motor. By rotating the rolling nut 2 forward slightly via the clutch mechanism 6 on the rear side, the front clutch 35 and the rear clutch 36 of the clutch mechanism 11 on the front side engage with each other. Since the shaft 1 is moved backward through the elongated holes 30, 30 and the detent pin 14,
As shown in FIG. 2, the blind rivet 40 has jaws 20
It is held by

Next, when the hand is released from the main frame 8 and the tip of the drill bit 41 of the blind rivet 40 held by the jaw 20 is pressed against the required plate material 42, the rotary power shaft is rotated in the forward direction. A hole is drilled in the plate material 42 by a drill bit 41, and at the same time, a blind rivet 40 is inserted into the hole (not shown).

In this state, when the main frame 8 is fixed by hand so that it does not rotate and the rotary power shaft 5 is rotated in the forward direction, the front clutch 35 of the front side clutch mechanism 11 and the main frame 8 are fixed together. The rear clutch 36 has a rivet 4 as shown in FIGS. 3 and 10.
Since it is engaged when setting 0, the rotation of the bearing frame 7 is restricted in this case, and therefore the shaft 1 is moved back as shown in FIG. 3 via the above-mentioned transmission means to perform the riveting operation. finish.

After the riveting work is completed, the main frame 8 is fixed by hand so that it does not rotate, and when the rotary power shaft 5 is reversely rotated in this state, the rotation stop pin 14
When the front clutch 35 moves forward and reaches the tip of the elongated hole 35b provided in the front clutch 35, the pin 14 moves the front clutch 35 forward against the spring S1 biasing the front clutch 35 backward. As shown in FIG. 11, the front clutch mechanism 11 is disengaged.
At this point, the restraint is released, and everything except the main frame 8, rear clutch 36, and rear cover 10 begins to spin freely.

Further, the cut rivet shaft is inserted into the jaw immediately before the rotation of the locking pin 14 is released.
It is discharged when the biting force caused by No. 20 is released.

Next, the operation of the rear clutch mechanism 6 in the present invention will be explained.

After completing the riveting work as described above, if the rotary power shaft 5 continues to rotate in the forward direction with the main frame 8 fixed, the shaft 1 will move as shown in FIG.
The shaft moves further backward from the position shown in FIG. (as particularly shown in Figures 4 and 5) the power shaft 5
A gap is formed between the side clutch 29, the movable clutch 28, and the rolling nut 2, and the engagement relationship between the two clutches 28 and 29 is broken, and the torque of the power shaft 5 is no longer transmitted to the movable clutch 28 side. The rolling nut 2 stops rotating and the backward movement of the shaft 1 stops.

Next, when both clutches 28 and 29 are in the position shown in FIG.
The portions A of the two engage with each other, and the rotation of the power shaft 5 is transmitted to the rolling nut 2, causing the shaft 1 to advance to the left in the figure and return to the initial position shown in FIG. This completes one cycle of the riveting operation.

[0018]

[Embodiment] An electric riveter according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
Ring nut 2, jaw mechanism 3, and head frame 4
, a rotating power shaft 5, a clutch mechanism 6 on the rear side that removably connects the rolling nut 2 and the power shaft 5, a deformed cylindrical bearing frame 7, and a cylindrical main frame. 8, front cover 9, and rear cover 1
0 and a clutch mechanism 11 on the front side.

The shaft 1 has a bottomed hole (for accommodating a part of the jaw member of the jaw mechanism 3) on the distal end side.
A concave hole) 12 is provided, a threaded rod portion 13 is provided on the rear side, and a detent pin 14 is provided approximately in the middle portion perpendicular to the axial direction.
The push rod 15 is provided through the rear end, with both ends protruding, and a push rod 15 protruding from the rear end.

The rolling nut 2 is screwed onto the rear end of the threaded rod portion 13 of the shaft 1, and a flange 16 is provided at the rear end of the nut. A connecting pin 17 to which the movable clutch of the clutch mechanism 6 is attached so that it can move forward and backward slightly, and a spring 18 for pressing the movable clutch are provided, respectively.

The jaw mechanism 3 is composed of well-known jaw members, namely, a jaw 20 housed in a jaw case 19, a jaw pusher 21, and a jaw pusher spring 22. , the jaw pusher 21 and the jaw pusher spring 22 therein are housed in the bottomed hole 12 of the shaft 1, and the jaw case 19 is connected to the tip of the shaft 1 via a rotation stopper ring 23. It is attached to the outer periphery.

The head frame 4 is fitted over the jaw mechanism 3 and the distal ends of the shaft 1, and its rear end is fitted onto the distal end of a bearing frame 7, which will be described later.

[0023] The rotary power shaft 5 has a bottomed hole (concave hole) with a required depth on the distal end side to enable the shaft 1 to retreat.
24, and in this embodiment, a steel ball 26 is fitted to the bottom of the steel ball 26 via an O-ring 25, and the push rod 15 of the retracting shaft 1 collides with the steel ball 26, causing the power shaft 5 to retract. The other clutch of the clutch mechanism 6 on the rear side described below is integrally formed on the front surface of the flange 27 of the opening of the bottomed hole 24. It is set up.

The clutch mechanism 6 on the rear side includes a movable clutch 28 attached to the rear surface of the rear end flange 16 of the rolling nut 2 via a connecting pin 17 and a pressing spring 18 so as to be able to move slightly back and forth. and the movable clutch 2
8 and a clutch 29 on the power shaft side that is integrally formed on the front surface of a flange 27 of the opening of the bottomed hole 24 in the power shaft 5.

The bearing frame 7 is of an unusual shape in which a small diameter frame part 7a in the front half, a medium diameter frame part 7b in the middle part, and a large diameter frame part 7c in the rear part are connected together. It is composed of a cylindrical body, and approximately in the middle of its small diameter frame part 7a,
Two elongated holes 30 located vertically in the axial direction as shown in FIG.
, 30 are provided oppositely.

Then, this small-diameter frame portion 7a is fitted onto the shaft 1, and both protruding ends of the detent pin 14 of the shaft 1 are fitted into the elongated holes 30, 30, and the small-diameter frame portion 7a is inserted into the long holes 30, 30. The tip of the frame portion 7a is fitted into the rear end of the head frame 4, and the rear end is fitted into the narrow diameter portion of the rolling nut 2. A thrust bearing 31, a rear end flange 16 of the rolling nut 2, a rear clutch mechanism 6, etc. are arranged inside the portion 7b, and a power bearing 32 is arranged inside the large diameter frame portion 7c. In the first half, a track ring 33, a spacer 34, etc. are arranged.

The main frame 8 is connected to the bearing frame 7 mentioned above.
It is composed of a cylindrical body fitted into the bearing frame 7, extending from the large diameter frame 7c to the middle diameter frame part 7b and the rear half of the small diameter frame part 7a, and the front cover 9 is inserted from the head frame 4 side, and its base end is screwed to the tip of the main frame 8. Furthermore, the rear cover 10 is inserted from the rear end of the rotary power shaft 5. The tip is inserted into the main frame 8 and its tip is screwed onto the rear end of the main frame 8.

The front clutch mechanism 11 is composed of a cylindrical front clutch 35 and a rear clutch 36 that are fitted into the small diameter frame 7a of the bearing frame 7, and the front clutch 35 is engaged with the rear end. The two elongated holes 30, 30 are provided with teeth 35a and are provided opposite to each other in the bearing frame 7.
It is provided with two long holes 35b, 35b along the axial direction that coincide with the clutch 35.
A returning spring S1 is press-fitted between the front end surface of the main frame 8 and the rear end surface of the head frame 4 to bias the clutch 35 rearward under normal conditions. The front part and the rear part of the front cover 9 are fitted.

The rear clutch 36 also has engagement teeth 3 at its front end that engage and disengage with the engagement teeth 35a of the front clutch 35.
6a, and is configured to be press-fitted into the main frame 8, fixed together with the main frame 8, and rotated. In accordance with the operating procedure described in section 1, the front cover 9 and the main cover are moved by the jaw 20 engaging the blind rivet 40, the drill blade 41 drilling the plate material 42, the riveting operation, and the clutch mechanism 11 being disengaged. Each member other than the rear clutch 36 of the front clutch mechanism 11 and the rear cover 10, which are integrally fitted to the frame 8 and the main frame 8, is allowed to rotate freely.

Further, at the rear end of the rear clutch 36, a spring member S2 made of a wave washer is press-fitted between the stepped portion of the small-diameter frame portion 7a and the medium-diameter frame portion 7b of the bearing frame 7. As shown in FIGS. 1 to 3, this spring member S2 is caused by an error in manufacturing the rivet between the main frame 8 and the step between the medium diameter frame portion 7b and the large diameter frame portion 7c in the bearing frame 7. When a gap B is generated, the spring biasing force of the spring member S2 causes the bearing frame 7 and the main frame 8 to
In addition to preventing rattling by relatively repulsively moving the
Smoothly and reliably engages and disengages the front clutch 35 and rear clutch 36 of the front side clutch mechanism 11,
This is useful in achieving the various operations described above without any problems.

The electric riveter is constructed as described above, and in FIGS. 1 to 3, 37 is a needle bearing, 38 is a power bearing spring, 39 is a nosepiece, and 40 indicates a blind rivet integrally equipped with a drill bit 41 at the tip, 42 indicates a plate material to be riveted, and a handle equipped with a forward/reverse rotation motor, a switch mechanism, etc. is removably attached to the power shaft 5. It is. (not shown).

The electric riveter of the embodiment constructed as described above is operated by operating as detailed in the operation section, and performs the intended drilling and riveting operations in a single electric riveter. This can only be achieved by
The riveting operation can be accomplished extremely efficiently and economically. Further, due to the arrangement configuration in which the front clutch 35 and the rear clutch 36 of the front side clutch mechanism 11 can be engaged and disengaged, the shaft 1 and the jaw mechanism 3 are brought to a predetermined position by reverse rotation of the rotary power shaft 5 after the riveting work is completed. After the backward movement, these members, together with the rolling nut 2, are in a free rotation state and do not rotate the front cover 9, main frame 8, and rear cover 10, so that the rotation motor of the power shaft 5 is Even if the timing of stopping the machine is delayed, it is possible to reliably prevent the danger of giving a strong shock to the hands of the workers who are holding the main frame 8, etc., and there is an advantage that the riveting work can be carried out smoothly and repeatedly. .

Further, since the front clutch mechanism 11 has a robust structure, it will not be damaged even if the front clutch 35 and the rear clutch 36 are repeatedly engaged and disengaged, and as described in the prior art described above. It has the advantage of being able to withstand use for a much longer period of time than the previous model, and also being free from assembly errors.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can also be applied to, for example, an air riveter using an air motor. Therefore, in short, the purpose of the present invention can be achieved,
It goes without saying that various design changes can be made without departing from the spirit of the invention.

[0035]

Effects of the Invention The present invention has the above-mentioned configuration and is operated and used as described above, so that it has the following excellent effects. (1) When performing blind riveting work, two types of tools are used: first, a drill tool is used to perforate the plate material to be riveted, and then a riveter is used to perform the riveting work, unlike conventional riveters. There is no need to perform two types of work at all, and the drilling work and riveting work can be performed continuously using only this riveter, which is extremely economical and efficient, and also improves safety when working at heights. Moreover, since it is constructed as an attachment type that utilizes the forward and reverse rotation motor of an existing tool such as an electric drill and is attached to the tool, it can be provided at a lower cost. (2) The engagement of the front clutch mechanism is configured so that it can be released when the jaw mechanism and shaft are moved back to their original positions. Even if the rotating motor of the power shaft becomes idle and the timing of stopping the rotating motor of the power shaft is delayed, it is possible to reliably prevent the danger to workers due to the reasons mentioned above, and to continue the riveting work smoothly and repeatedly. It can be achieved. (3) Since the front side clutch mechanism 11 has a robust structure, the front clutch 3
5 and the rear clutch 36 are not damaged even if they are repeatedly engaged and disengaged, the present invention has the advantage that it can withstand use for a much longer period of time than the prior art described above, and there is no possibility of assembly errors.

[Brief explanation of the drawing]

[Figure 1] Longitudinal front view of the entire riveter,

[Figure 2] Longitudinal front view with blind rivet engaged,

[Figure 3] Longitudinal front view at the end of riveting work,

FIG. 4 is a partially omitted front view of the main parts showing a state in which the engagement relationship of the rear clutch mechanism starts to disengage;

[Fig. 5] A longitudinal sectional front view of the main parts of Fig. 4 with some parts omitted;

FIG. 6 is a partially omitted front view of the main parts showing a disengaged state of the clutch mechanism on the rear side;

[Fig. 7] A longitudinal sectional front view of the main part of Fig. 6 with some parts omitted;

FIG. 8 is a partially omitted front view of the main parts showing the state immediately before the rear clutch mechanism is engaged;

FIG. 9 is a front view of the main part of FIG. 8 with some parts omitted;

FIG. 10 is a partially omitted front view showing the engaged state of the front clutch mechanism during riveting;

FIG. 11 is a partially omitted front view showing a state in which the front clutch mechanism starts to disengage immediately after the rivet shaft is discharged;

12 is a partially omitted front view showing a state in which the disengaged state of the front side clutch mechanism has further advanced from the state shown in FIG. 11;

13 is a partially omitted front view showing a state where the disengaged state of the front side clutch mechanism has further advanced from the state shown in FIG. 12;

FIG. 14 is a partially omitted front view showing a state in which the front clutch mechanism is completely disengaged.

[Explanation of symbols]

1...shaft, 2...Rolling nut, 3... Jaw mechanism, 5...Rotating power shaft, 6... Rear side clutch mechanism, 7...Bearing frame, 8... Main frame, 11...Front side clutch mechanism, 13...screw part, 14... Detent pin, 24...Bottomed hole, 30...long hole, 35...front clutch, 35b...long hole, 36... Rear clutch, S1...Returning spring.

Claims (3)

[Claims] Claim 1: The distal end side is connected to the jaw mechanism, a threaded rod is provided on the rear side, and a detent pin is provided at a suitable position in the middle portion thereof across the axial direction, with both ends of the pin protruding. A rolling nut screwed onto the rear end of the shaft, a clutch mechanism on the rear side that removably connects the rolling nut to the rotating power shaft, and a clutch mechanism fitted onto the shaft. a cylindrical bearing frame having two long holes facing each other along the axial direction into which protrusions at both ends of the locking pin of the shaft are inserted; and a front side fitted into the bearing frame. and a cylindrical main frame fitted onto the bearing frame with the front clutch mechanism interposed therebetween. The front clutch has two long holes along the axis that match the long holes and into which the protrusions at both ends of the locking pin are inserted, and the front clutch is biased by a spring toward the rear and rotates at the same time as the main frame. It consists of a rear clutch that is integrally fitted to the main frame, and a bottomed hole of a required depth is provided on the tip side of the rotary power shaft to allow the rotary shaft to retreat and the rear clutch mechanism to operate. A riveter characterized in that the front clutch and the rear clutch of the front side clutch mechanism can be engaged and disengaged by forward and reverse rotation of the rotary power shaft. [Claim 2] A clutch mechanism on the rear side is configured by a clutch integrally formed on the distal end surface of the rotary power shaft and a movable clutch movable back and forth provided on the rear surface of the rolling nut. The riveter according to claim 1. [Claim 3] The rear clutch of the front clutch mechanism is configured to be directly or indirectly biased forward by a spring member disposed directly or indirectly on the rear side. The riveter according to claim 1, characterized in that: