JPH0683882B2 - Blind riveting tool - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a housing, an abutting member having a rivet engaging surface at a front end that engages a head of a rivet at the time of rivet caulking operation, and a rivet caulking operation. A means for pulling the shaft portion of the mandrel with respect to the abutting member, which is reciprocable in the housing, is provided, and the abutting member and the mandrel pulling means are respectively arranged around a common axis along which the mandrel is pulled. It has a plurality of rivet assembly engaging portions, and these rivet assembly engaging portions open and close with respect to the common shaft. In the open state, the mandrel with a pulling head is allowed to be introduced between the engaging portions, while the rivet assembly engaging portions are closed. In this state, the abutment member and the head of the rivet are engaged with each other, the mandrel tensioning means and the mandrel inside the tensioning head are engaged, and the abutment member and mandrel Each rivet assembly engaging portion of the tensioning means is elastically biased to its respective open state and an annular actuating element surrounding the outer periphery is arranged to close by advancing onto the rivet assembly engaging portion of the abutment member. Blind riveting tool.

(Prior Art) A blind riveting tool configured as described above is described in, for example, U.S. Pat.No. 2400354, but this tool has a structure of manual operation and manual feeding, and has an annular shape. The actuating member is also manually retracted to open each rivet assembly engaging portion of the abutment member and mandrel tensioning means, allowing the introduction of a new rivet assembly mandrel. It is inconvenient and slow to load a tool with a new rivet, and the operator has only two hands, but practically three hands: holding the tool, operating the actuating member, and pinching and inserting a new rivet. Is a work that requires.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to apply to a blind rivet assembly having a pulling head on a mandrel, and to receive and engage the mandrel of such a rivet assembly. A blind riveting tool having means is provided.

(Means for Solving the Problems) According to the present invention, the above-mentioned object is such that the actuating element is mounted in the housing so as to be reciprocable along the common axis behind the front extending sleeve portion of the housing. The member and the mandrel pulling means are also between a rear position, a portion of which can be opened and closed after the front extension sleeve portion of the housing, and a front position where the rivet engaging surface of the abutment member is exposed and provides a rivet to the workpiece. This is achieved by being able to reciprocate along a common axis.

Preferably, in the tool according to the invention, the actuating actuating element of the tool is configured to be advanced along the abutment member before the abutment member enters the forward extension sleeve portion of the housing, the abutment member being forward. It is kept closed as it passes through the extension sleeve portion. Also preferably, the front extending sleeve portion of the housing has the same inner diameter as the operating sleeve, and the operating sleeve is advanced to the rear end of the front extending sleeve portion during operation of the tool, and the abutting member and the mandrel pulling means are located at the forward positions, that is, When the rivet is in the crimped position, it is kept closed by the front extending sleeve portion.

Preferably, in the tool according to the invention, pneumatic means are provided for advancing and retracting the actuating sleeve over the abutment member and for advancing and retracting the abutment member through the forward extension sleeve portion of the housing to operate the tool. When the abutment member advances, the advancing of the actuating sleeve occurs after the abutment member closes. It is also possible to provide hydraulic means for causing relative axial displacement between the mandrel pulling means and the abutment member to crimp the rivet.

Also preferably, in the tool according to the present invention, the mandrel engaging portion of the mandrel pulling means is housed within the rivet engaging portion of the abutment member and keyed thereto, each mandrel engaging portion retracting the abutment member. It opens and closes as it moves forward, and mutual axial displacement is restricted by keying means.

The front extension sleeve portion of the housing of the tool according to the invention has a longitudinal opening in its wall, through which said opening the blind rivet assembly is located when the abutment member is in the rear position behind the front extension sleeve portion of the housing. May be introduced to allow insertion of the mandrel shank between the abutment member and each open rivet engagement portion of the mandrel tensioning means. The blind rivet assembly is received from the blowing hose and the received assembly is axially directed into the open abutment member and mandrel pulling means through the opening in the forward extension sleeve portion of the housing. Rivet assembly feeding means for
It can also be provided in the tool housing. Further, the feeding means comprises an arcuate pipe element mounted so as to swing about a center of curvature on an axis located along a direction perpendicular to the reciprocating direction of the contact member, and the feeding position advanced. When the tubular element is inserted into the housing through the opening and the delivery end of the tubular element is aligned with the open abutment member, the other end or inlet of the tubular element is at the delivery end of the hose. When aligned and in the retracted position, the tube element may be withdrawn from the path of the abutment member through the forward extension sleeve portion of the housing. The advance and retreat of the pipe element is performed by the operation of the operation sleeve during the operation of the tool,
The tool comprises a rack and pinion means for advancing and retracting the pipe element, which rack is connected to the actuation sleeve by a movement connection from which the movement of the pipe element can only occur near the end of the back and forth stroke of the actuation sleeve. .

The abutment member of the tool according to the invention consists of a sleeve with a rear end of a piston slidable in a fluid pressure cylinder,
The mandrel pulling means is composed of a sleeve having a piston at the rear end, which protrudes forward into the sleeve of the abutment member and is slidable, and which is slidable inside the cylinder behind the piston of the abutment member. A fluid passage is provided in the housing for acting on the rear side of the piston of the pulling means to advance the two pistons and moving on the front side of the piston of the abutting member to retract the two pistons. There is further provided a fluid passage which penetrates near the piston and opens between the two pistons into the cylinder, through which pressurized fluid is introduced to separate the two pistons when they are at the front end of the cylinder. The rivet crimping stroke of the mandrel pulling means can be achieved during the operation of the tool. Such a tool includes means for supplying pressurized air to the cylinder in front of the piston of the abutting member and rearward of the piston of the mandrel tensioning means, and hydraulic oil in the sleeve of the mandrel tensioning means, so that the pressure between the pistons is increased. Can have means for guiding it into the cylinder. A hollow cylindrical rod or sleeve extends forwardly through the annular seal in the piston of the mandrel tensioning means and forwardly from the end cap at the rear end of the sillida, terminating within the annular seal abutting the inner surface of the sleeve of the mandrel tensioning means. The hydraulic oil introduced into the cylinder between the two pistons passes through the passage in the wall of the hollow rod formed immediately behind the annular seal and the annular chamber between the hollow rod and the sleeve of the mandrel means, and then to the piston of the mandrel tensioning means. It can flow from the rear through a hollow rod into a passage through the adjacent wall. In this case, the hollow rod has a double cylindrical wall, the hydraulic oil flows through the space between the two walls sealed at each end, and can serve as a rear discharge passage of the mandrel shaft portion whose inner wall is broken. .

Hereinafter, an exemplary blind riveting tool according to the present invention will be described in detail with reference to the accompanying drawings. It will be appreciated that this exemplary tool was chosen as an illustrative example and is not a limitation of the present invention.

EXAMPLE Referring to FIG. 1, an exemplary tool is a pneumatic / hydraulic cylinder.
Consists of a housing 10 with a front portion including a rear extension portion providing a 12 and a front extension sleeve 14. A pistol-shaped grip handle 18 hangs from the central body 16 of the housing 10 (see also FIG. 4). The central body 16 of the housing 10 has an intermediate annular wall 26 which separates the interior front and rear bores 28, 30 respectively, the rear bore 30 extending within the cylinder 12 to extend the front bore 28.
Much longer.

The abutting member 50 (FIG. 1) of the illustrated tool is mounted in the housing 10 so as to be reciprocally movable in the axial direction.
Is an annular seal 54 (FIGS. 5 and 7) in the intermediate annular wall 26.
It comprises a hollow cylindrical sleeve 52 having a hollow piston 56 slidable therethrough and slidable in the rear bore 30 at its rear end. A nose piece 58 (Figs. 2 and 3) is screwed to the end of the hollow cylindrical sleeve 52, and the nose piece 58 is a hollow steel cylinder having an inner hole terminating in a conical inner surface 60 having an obtuse apex angle. Are formed from. The outside of the nosepiece 58 terminates in a flat or hollow end surface 62 that engages the head of the rivet, which end surface 62 is surrounded by a frustoconical surface 64. A hole 66 having a diameter capable of receiving the shank of the mandrel extends through the end wall thus formed. The nose piece 58 is divided into eight arcuate divided pieces 68 by eight slots, and these divided pieces are urged to the normally open state by their elasticity by expanding outward and tempering. It extends to the rear enough. In the open state, the tips of the split pieces 68 that cooperate to provide the end surface 62 are sufficiently wide apart to allow for the introduction of a mandrel pulling head. When the pieces 68 are pushed towards the center and closed, the pieces generally come into contact with each other, creating a substantially continuous annular engagement with the head of the rivet.

Inside the abutting member 50, a second hollow piston assembly constituting the mandrel pulling means 70 of the illustrated tool is mounted. The mandrel pulling means 70 is attached to the rear end of the piston 56
It has a hollow piston 71 (Figs. 1 and 5) that can slide in the rear hole 30 of the cylinder 12 at the rear. Piston 71 is a sleeve that slides through an annular seal in piston 56.
It is fixed at 72. Sleeve 72 is an adapter at its front end
74 is received by screw engagement, and the adapter 74 is a cylindrical collet 76.
It is screwed to receive the threaded rear end (see also FIG. 2). The collet 76 has a plurality of resilient fingers 80 that are spaced apart from each other like the split piece 68 and are always biased against the inner wall of the split piece 68, but the collet inner end wall is flat and has a nose. Inner surface 60 of piece 58
And a frustoconical outer end wall that is complementary to. That is, each finger 80 has a rearward facing shoulder 82 perpendicular to the axis of the cylinder 12 for engaging the underside of the mandrel pulling head during the rivet swaging operation.

Since each finger 80 is always urged to open and spread by its own elasticity, it opens and closes together with the split piece 68 during the operation of the tool.

Axial displacement of the pulling means 70 within the abutment member 50 results in two stepped stopper pieces 86 housed in diametrically opposed radial slots 88 in two of the split pieces 68 of the abutment member 50.
(Figs. 2 and 5). Each stopper piece 86
Is a projection housed in a wide annular groove 92 around the collet 76.
Have 90. The stopper piece 86 is in each slot,
It is held by the elastic band 94.

Opening and closing each segment 68 of the nosepiece 58 of the abutment member 50 and each finger 80 of the collet 76 of the mandrel tensioning means 70 under its action causes actuation elements in the form of a sleeve 100 during operation of the exemplary tool. It is made by moving back and forth over the outer surface of the nosepiece. When the actuating sleeve 100 is in the rearward position (as shown in FIG. 7), the segments 68 are elastic and freely openable or expandable to an overall diameter greater than the diameter of the cylinder formed by each segment. . The sleeve 100 has a content that slide-fits with the original diameter of the nose piece. Thus, as the sleeve 100 moves forward over the nosepiece 58, the pieces 68 close when they are almost in contact (actually the slot faces separating the pieces are adjacent in parallel). at the same time,
Push finger 80 of collet 76 inward as well. When opened, there is room for pulling and introducing the head of the mandrel between the split pieces 68 and between the fingers 80, and when closed, the split pieces and fingers closely surround the mandrel shank.

A housing sleeve portion 96 extending further forward is screwed into the front extension sleeve portion 14 of the housing 10, the sleeve portion 96 having the same inner diameter as the operating sleeve 100, and the abutment member 50 operating the tool. It sometimes serves to keep the nosepiece 58 closed when the sleeve 100 is advanced.

The actuation sleeve 100 slides within an annular seal 102 in the forward extension sleeve portion 14 of the housing 10. Sleeve 100
Has a flange 104 (constituting a piston) at its rear end. The flange 104 includes an outer seal ring 106 that slides in the front hole 28 of the housing 10 and an inner seal ring 10 that slides on the outer surface of the sleeve 52 of the abutment member 50.
Supports 7 and.

A tube 110 projects rearwardly from the adapter 74 to provide a continuous passage therethrough and is free to pass into the hollow sleeve 112. The sleeve 112 has a large-diameter head 114 at its front end, and the large-diameter head 114 has an annular seal 115 that abuts the inner wall of the sleeve 72. The length of the sleeve 112 between the two bearing portions 116 (just behind the large diameter head 114 in FIGS. 5 and 7) and 118 (FIG. 8) is small, and both bearing portions support the hollow rod 120. An annular chamber 122 is formed in the hollow rod 120 between the bearing portions. Hollow rod 120 is piston 71
It extends through the inner seal 117 and extends rearward. Hollow rod 120
Has an outer diameter smaller than the inner diameter of the sleeve 72, and the communication between the two annular chambers 122 and 123, which provides the annular chamber 123 therebetween, is made by the bearing portion 1.
Hollow rod 120 adjacent to each of 16 and 118, port at each end
Obtained by 124; as can be seen, the total stroke length of the piston 71 corresponds between both ports. The sleeve 112 is fixed at its rear end to an end cap 126 mounted on the cylinder 12; that is, this fixes the sleeve 112 and the head 114 in the housing 10.

The housing 10 of the exemplary tool includes oil and air passages for advancing and retracting strokes of each piston 56, 71, 104. That is, there is an inlet 130 in the handle 18 from which oil can pass through the pipe 128 to the end cap 126.
Can flow in and out. The means for connecting the inlet 130 to the hydraulic thickener is not shown in the figure and is of conventional construction. Oil flows from tube 128 through passage 131 in end cap 126 and through sleeve 124 through port 124 at the rear end of hollow rod 120.
2. It flows into the annular chamber 122 between the hollow rods 120 and further into the sleeve 72 of the mandrel pulling means 70 via the port 124 at the front end of the hollow rod 120. Piston 7 on port 136
Opening through the sleeve 72 just in front of 1; that is, pressure oil flowing through the port 136 into the rear bore 30 of the cylinder 12 exerts pressure on both pistons 56, 71, causing them to separate. When the hydraulic pressure is released, the oil flows in the opposite direction through the above system.

The rear surface of the piston 56 and the front surface of the piston 71 are constantly exposed to the pressure oil supplied to the inlet 130, while the front surface of the piston 56 and the rear surface of the piston 71 are always exposed to air. Thus, air is provided to the cylinder 12 via appropriate ports 156 (Fig. 6), 158 (Fig. 8) and passages in the housing 10 which are provided according to normal practice in double acting cylinders, not described in detail herein. It is introduced into and discharged from the front and rear.

The operation cycle of each part of the rivet caulking of the illustrated tool is such that the blind rivet assembly B including the rivet R and the mandrel M is loaded into the divided piece 68 and the finger 80, and the contact member 50 and the mandrel pulling means 70 are shown in FIG. It is most convenient to consider starting from the respective forward positions as shown in FIG. 7; the blind rivet assembly is shown in FIG. 7 when it is fed to the nosepiece. The nose piece 58 slightly protrudes from the sleeve portion 96 of the housing 10 and is kept closed by its longitudinal extension. Each segment and finger closely surround the mandrel M and their shoulders overlap the pulling head P of the mandrel so that the mandrel does not fall off.

A means for controlling the flow of air and hydraulic oil and sequentially operating each part of the tool is schematically shown in FIG. When the tool is stationary as shown in FIG. 1, air from the compressed air source 200 passes through the two-position valve 202 into the rear end of the cylinder 12 behind the piston 71 and into the front hole 28 behind the sleeve 100. Flows in. That is, the contact member 50 is held in the housing at the foremost position by the pressurized air in the cylinder 12 behind the piston 71 that is in contact with the piston 56, and the hydraulic pressure at the inlet 130 is atmospheric pressure. The air behind the actuation sleeve 100 is also under pressure.

The tool is now applied to the work piece (not shown), the rivet R is inserted into the hole in the work piece and the rivet head is pressed against the work piece by the nose piece 58. The handgrip 18 is provided with a push button switch of an electric control circuit. When the operator presses this switch, the solenoid valve 206 in the hydraulic circuit is energized, and the pressure oil from the pressure intensifier 208 is introduced into the inlet 130 and further into both pistons. It is introduced into the cylinder 12 between 56 and 71. At the same time, the 2-position valve 202 is energized and the piston 7
1 Immediately open the passage for exhausting the air behind. Pressure oil separates both pistons 56, 71 and crimps the rivet by pulling on the mandrel while pressing the head of the rivet; the mandrel eventually breaks at the neck of the rivet with a reduced cross section of the mandrel shaft and the mandrel The broken portion of the shaft M (shown in FIG. 5) is rubbed against the fingers.
If not held between 80, it will be expelled rearward along tube 110 and sleeve 112 and into hose 150 leading to a suitable receiver. The separation between pistons 56 and 71 is limited by slot 88 and stopper piece 86. The tool is now in the condition shown in FIG. Preferably, for example, the air pressure in the receiver is reduced to generate suction through the hose, and the air is slowly and continuously flowed backward along the tube, the sleeve, and the hose to facilitate discharge of the mandrel shaft portion. .

The bias of the valve 202 opens the front hole 28 behind the sleeve 100 to generate exhaust gas, and the air line 21 leading to the front part of the cylinder 12.
Press 0. However, at this point in time, the pulling means 70 is held by the mandrel at the front, so that the piston 56 cannot move backward. However, when the mandrel breaks, the piston 56 moves backwards, pushing the piston 71 backwards. After a time delay preset in the electrical control circuit, solenoid valve 206
Is de-energized and the pressure oil is reversed by the spring pressure and both pistons 56
It flows out from the inside of the cylinder 12 between 71. When the piston 71 reaches the rear end of its stroke, it engages the spring-loaded plunger 212 of the valve 214 and directs pressurized air from the line 210 into the front hole 28 at the front of the piston 104, retracting the working sleeve 100. At the same time, the split piece 68 of the nose piece 58 and the finger 80 of the mandrel pulling means 70 are opened (see FIG. 7), and if the broken mandrel shaft portion is not released yet, it is released and discharged to the rear of the tool.

As explained below, in the entire operation cycle of the example tool,
The new blind rivet assembly is nosepiece 58
And the fingers 80, and by reversing the air pressure in the front hole 28, the operating sleeve 100 advances and the split piece 68
And close the finger 80 and rear hole behind the piston 71.
When air is introduced into the inside 30, the contact member 50 and the mandrel pulling means 70 are moved forward, and the respective parts for rivet swaging are returned to the state shown in FIG. The advancement of the sleeve 100 and both pistons 56, 71 is accomplished by deactivating the solenoid of the valve 202 and switching the valve 202, which is operated by the pushbutton 14.
It occurs when a predetermined time set by the time delay of the electric control circuit elapses after pressing 8. However, since the valve 204 is provided in the line following the rear part of the cylinder 12, the pistons 56 and 71 are moved forward.
The front pressure is reduced and the valve 204 is delayed until it opens the cylinder 12 behind the piston 71. Thus, the tool returns to the state shown in FIG. 1 regardless of whether the operator has released pushbutton 148, but the second cycle does not begin until the operator releases pushbutton 148 and presses it again.

The means of an exemplary tool for loading a new rivet assembly into the mandrel tensioning means 70 while the abutment member 50 is retracted will now be described. The assembly feeding structure itself is the subject of pending Japanese patent application 61-41360 by the applicant.

The sleeve portion 14 of the housing 10 of the exemplary tool has a drooping extension portion 160 (FIGS. 4, 5 and 7) having a substantially flat side surface,
One side 162 is integrated with the sleeve portion 14, and the other side is a cover 1
Make 64. Both parts 162, 164 carry a rotatable lateral pivot pin 166 to which a pinion 168 is fixed. The pinion 168 engages a rack 170 that is longitudinally reciprocable below the sleeve 100 in a bearing 172 provided by the sleeve portion 14 of the housing. The rack 170 has teeth along its lower edge that mesh with the teeth of the pinion 168. An elongated slot 174 extends along the back of the rack and a pin 176 secured to a ledge 178 depending from a collar 177 screwed to the sleeve 100 moves within the slot 174.

Bracket 1 that can be rotated back and forth integrally with the pinion 168
80 is fixed and fixed to a bracket 180 to a curved tube 182 concentric with the pinion 168. The piston is rotated clockwise to the limit (shown in FIGS. 5 and 7) by the stroke of the sleeve 100 or by the stopper surface 184 of the bracket 180 engaging the stopper surface 186 of the depending extension 160. When swung to, the delivery end of the curved tube 182 projects through the opening 187 in the sleeve portion 96 of the housing, aligns with the segment 68 of the nosepiece 58, and closely aligns with the segment. Also, when the curved tube 182 is in the delivery position described above, the other end or inlet of the tube is aligned with the delivery end of the hose 192 extending from the source of the blind bed assembly. The means for releasing the blind rivet assembly is one at a time with the mandrel pulling head facing forward.
The individual assemblies are released and each assembly (one shown in FIG. 7) is blown along the hose 192 when the curved tube 182 is in its delivery position, one assembly for each mandrel pulling means. However, this means will not be described further here. As shown in FIG. 7, the inlet end of the curved tube 182 and the hose 1
The 92 outlets have complementary, curved opposite ends to allow each assembly to pass from the hose to the curved tube across a minimum gap.

When the pinion 168 swings counterclockwise up to the other limit of the movement given by the engagement between the stopper surface 188 of the bracket 180 and the stopper surface 190 of the depending extension 160, or the stroke of the operating sleeve 100 (the fifth (See the figure),
The delivery end of the curved tube 182 exits the path of the abutment member 50 and pivots downwardly, and then the abutment member 50 is advanced as previously described to prepare the tool for the next blind riveting operation.

In order to swing the bracket 180 and the bending tube 182 at proper timing during the operation cycle of the example tool, the torsion spring 194
(Fig. 4) shows the hanging extension 160 and the pinion 168 of the housing.
Acts on the fixed pin 166 to urge the bracket 180 clockwise (in FIGS. 5 and 7). The slot and pin couplings 174, 176 allow movement to occur from between the actuating sleeve 100 and the rack 170 at the beginning of advancement of the actuating sleeve 100 and before the curved tube 182 leaves its delivery position 58. Also, the fingers 80 are closed to control the newly sent blind rivet assembly.

[Brief description of drawings]

FIG. 1 is a side elevational view of an exemplary tool, partially shown in longitudinal section, wherein the tool is loaded with a blind rivet assembly,
The tool is ready to be applied to the work piece for the blind rivet setting operation; FIG. 2 shows each rivet assembly engaging portion of the abutment member of the exemplary tool and a portion of the mandrel tensioning means in a radial direction. Partial view in section; FIG. 3 is a lateral sectional view taken along line III-III in FIG. 2; FIG. 4 is a lateral sectional view taken along line IV-IV in FIG. 5; 7 and 7 are similar to FIG. 1, but show the parts of the tool at successive stages in the working cycle of the exemplary tool, the rear part of the tool being omitted in each of these figures; FIG. A view mainly of the rear cross-section showing the parts in the positions they occupy in the stages shown in Figures 6 and 7;
And FIG. 9 is a circuit diagram of the fluid control means of the tool. 10 ...... Housing, 12 ...... Fluid pressure cylinder, 50 ...... Contact member, 52 ...... Same sleeve, 56 ...... Same piston, 62 ...... Rivet engaging surface, 68 ...... Riveting assembly of contact member Mating part, 70 …… Mandrel pulling means, 71 …… Same piston,
72 …… Same sleeve, 80 …… Same rivet assembly engaging part, 96
...... Front extension sleeve portion, 100 ...... Actuating element (sleeve), 122, 123, 124, 136, 156, 158 ...... Flow passage, 182
...... Rivet assembly feeding means, 187 ... Opening, 192 ... Hose, B ... Blind rivet assembly, R ... Rivets,
M: Mandrel, P: Pulling head.

Claims (5)

[Claims] 1. A housing (10), an abutment member (50) having a rivet engaging surface (62) at a front end for engaging a head of the rivet (R) when the rivet (R) is caulked, and a rivet (R). ) Is capable of reciprocating in the housing (10) during the crimping operation, and is provided with means (70) for pulling the shaft portion of the mandrel (M) with respect to the contact member (50). The means (70) each have a plurality of rivet assembly engaging portions (68, 80) centered about a common axis along which the mandrel (M) is pulled, the rivet assembly engaging portions (68, 80). 68, 80) open and close with respect to the common shaft to allow the mandrel (M) with a pulling head to be introduced between the engaging portions in the open state, while the contact member (50) and the rivet (R) in the closed state. ) Head and the mandrel pulling means (70) The mandrel (M) on the inner side of the tensioning head is engaged, and further, the abutment member (50) and the rivet assembly engaging portions (68, 80) of the mandrel pulling means (70) are elastically moved to their open states. A blind riveting tool, wherein an annular actuating element (100) that is biased and surrounds the outer periphery is arranged to close by advancing onto the rivet assembly engaging portions (68, 80) of the abutment member (50). The actuating element (100) is mounted in the housing (10) so as to reciprocate along a common axis behind the forward extending sleeve portion (96) of the housing (10), and the abutment member (50) and the mandrel. The pulling means (70) is also a rivet (R) in which the rear position where a part of the pulling means (70) can be opened and closed after the front extending sleeve part (96) and the rivet engaging surface (62) of the contact member (50) are exposed. Along the common axis between the Blind riveting tool characterized in that it is reciprocable Te. 2. A front extension sleeve portion (96) of the housing (10) having the same inner diameter as the sleeve of the actuating element (100),
During operation of the tool, the operating sleeve (100) advances to the rear end of the forward extending sleeve portion (96), and the rivet assembly engaging portions (68, 80) of the contact member (50) and the mandrel pulling means (70). )
Before advancing them, the rivet assembly engaging portions (68, 68) of the abutment member (50) and the mandrel pulling means (70) are closed.
Tool according to claim 1, characterized in that 80) is held closed in the respective forward position by the forwardly extending sleeve part (96) of the housing (10). 3. A front extension sleeve portion (96) of the housing (10) has an opening (187) in its wall, and an abutment member (5).
The blind rivet assembly (B) is introduced through the opening (187) when the (0) is in the rear position behind the front extension sleeve part (96) of the housing (10), and the shaft part of the mandrel (M) is introduced. The insert according to claim 1, characterized in that it can be inserted between the abutment member (50) and each open rivet assembly engaging portion (68, 80) of the mandrel tensioning means (70). tool. 4. A blind rivet assembly (B) is received from its suction hose (192), and the received assembly (B) is passed through an opening (187) in a front extension (96) of the housing (10). Open abutment member (50) and mandrel tensioning means (7
0) axially directed rivet assembly feeding means (182)
Tool according to claim 1, characterized in that it is provided in the housing (10) of the tool. 5. The abutting member (50) comprises a cylindrical sleeve (52) having a piston (56) slidable in a fluid pressure cylinder at a rear end thereof, and the mandrel pulling means (70) comprises the abutting member (70). The piston (56) of the abutting member (50) is slidable by protruding forward into the cylindrical sleeve (52) of the 50).
A piston (71) of the mandrel pulling means (70), which comprises a sleeve (72) having a piston (71) slidable in the cylinder (12) rearward and having a rear end, and pressurizing fluid.
Of the contact member (50) to move the pistons (56, 71) forward of the piston (56) and to move the pistons (56, 71) backward of the housing. Cylinder (12) provided in (10) and penetrating sleeve (72) of mandrel pulling means (70) near its piston (71) and between both pistons (56, 71).
A fluid passage that opens inside is further provided, and when both pistons (56, 71) are at the front end of the cylinder (12), the pressurized fluid is introduced through the fluid passage to both pistons (56, 71).
Separation and mandrel pulling means during tool movement (70)
Tool according to claim 1, characterized in that it fulfills the rivet (R) crimping stroke of