摘要:
Repulsive magnetic forces in the axial direction of cylinder tubes act between the rows 11 of inner magnets of pistons 10, 10 accommodated in two cylinder tubes 2, 2, and the inner magnets 12 of the pistons 10 come to a halt being slightly deviated relative to the outer magnets 22 in the axial direction of the tube. Due to this deviation, a magnetic holding force Fc is produced between the inner and outer magnets 12, 22. Since the magnetic holding force Fc is produced in a static state, a smooth movement can be attained from a static state suppressing the occurrence of a stick slip phenomenon at the start of movement as compared to the prior art, which does not produce the magnetic holding force in a static state.
摘要:
According to a rotary clamp cylinder of this invention, in a rod cover 5, attachment holes 18 are formed so as not to intersect an axis CL of a piston rod 11, and pin members 19 are rotatably fitted in the attachment holes 18, respectively. An amount L of engagement between each pin member 19 and each turning guide groove 14 becomes greater, on the side of the axis CL of the piston rod 11 in the pin member 19 than on the side opposite to the side of the axis CL of the piston rod 11, and the outer circumferential face 21 of each pin member 19 on the side opposite to the side of the axis CL of the piston rod 11 can be supported by the inner face of each attachment hole 18, over substantially the entire length thereof. Accordingly, excessively large load and/or impact could be received by the pin members 19, as such the increase of the transfer speed upon clamping or unclamping, and/or attachment of a longer clamper 12 to the piston rod 11 can be further facilitated.
摘要:
A magnet type rodless cylinder provided with a slide magnetically coupled with a piston arranged in a cylinder tube and a slide able to move outside of the cylinder tube. The slide has a connection mount detachably attached to it. When attaching the connection mount, the position where the connection mount and an end cap strike/contact becomes the striking/contacting position of the piston. When using a rodless cylinder without a connection mount, the distance between the slide and an end cap when the piston is positioned at the striking/contacting position becomes longer than the striking/contacting distance due to the removal of the connection mount. Therefore, external dampers able to strike/contact the slide are detachably attached to the end caps at the slide sides. Due to this, regardless of the use or nonuse of a connection mount, the piston and slide can always stop at the striking/contacting position.
摘要:
A safety lever (safety control member) is provided in its inner surface with first, second and third positioning holes. The tapered outer end part of a safety lock (trigger blocking member) is engaged in the first positioning hole of the safety lever to retain the safety lever at a perfect lock position. In this state, the forward turning of the upper arm of the trigger is blocked by the safety lock. Thus, the trigger cannot turn even if the same is pulled. Since the safety lock is fitted in a sliding hole formed in a casing so as to be slidable in directions perpendicular to a plane in which the trigger turns, and force applied to the trigger is born by the casing, the safety lock does not deform and is able to block the movement of the trigger with reliability even if the trigger is pulled strongly. In this state where the safety lever is at the perfect lock position, the bolt blocking part of the safety lever is engaged in a groove formed in a bolt. In this state, the bolt is locked perfectly and cannot be turned to open the chamber. When the safety lever is turned to a safety position, the bolt can be operated, while the trigger is still restrained from turning by the trigger blocking part of the safety lock.
摘要:
When a spindle unit 1 rises to a tool change position P1 of a printed-circuit board drilling apparatus, a pair of cam followers 27, which have been spaced downward from a pair of operating pins 38, are brought into engagement with conical portions 39 of the operating pins 38 and caused to move toward each other. As a result, a pair of opening/closing arms 24 that are provided under a pressure foot 20 and that serve as suppressing members for preventing floating of the printed-circuit board are moved away from their suppressing positions A in which the opening/closing arms 24 are kept closed by the force of a spring 28, to their retracted positions B. Consequently, forward end portions of the opening/closing arms 24 are positioned outside a tool passage zone S through which a tool post passes when a tool is changed. As a result, the suppressing members 24 used to prevent floating of the printed-circuit board are retracted without using a drive source, when tool change is made, so that the suppressing members do not become an obstacle to performing the tool change operation.
摘要:
A sliver piecing unit 80 includes three sets of separable rollers 804 and 844, 806 and 846, and 808 and 848 for nipping a sliver S1 fed from a consumed can to a spinning machine. A throttling nozzle 870 is arranged between the second and third sets of rollers 806 and 846, and 808 and 848. The draft ratio between the first and second sets of rollers 804 and 844, and 806 and 846 can be varied between 1.0 and 2.0. A sliver feed unit 70 includes a separable first and second roller 702a and 702b for feeding a sliver S2 from a full can to the piecing unit 80 so that the slivers S1 and S2 are combined. The draft ratio between the first and second sets of rollers 804 and 844, and 806 and 846 is controlled to obtain combined slivers of a thickness corresponding to that of a single sliver. A nipping belt 884 and nipping roller 886 are provided at the outlet from the third set of the rollers 808 and 804 for obtaining a rubbing movement in the combined slivers. A breaking element 802 is provided at the inlet to the first set of the rollers 804 and 844 to break the first sliver S1 after the completion of the piecing operation.
摘要:
A creel device for a drawing frame, having a drive train for lifting rollers for taking out slivers from respective cans. In one embodiment, the cans are divided into two groups each constructed at consecutively located cans. The drive train is divided into two sections for driving respective lifting rollers for respective groups of cans. The basic section is for driving lifting rollers for the group adjacent the draft part, and the second section is for driving lifting rollers from the group remote from the drafting part. The first section is connected to a rotating movement source in the machine frame, while the second section is connected to a variable speed motor. The speed of the variable motor is set so that a predetermined ratio is obtained between the rotational speed of the lifting rollers of the second group and the rotational speed of the lifting rollers of the first group, so that a substantially equal tension is obtained between the sliver taken out from the can adjacent the draft part in the first group and the sliver taken out from the can adjacent the draft part in the second group.
摘要:
A top-comb driving mechanism applied to a conventional combing machine, wherein cycles of forward amd rearward reciprocal swinging displacing motions of a nipper body of each combing head are carried out, is provided with a motion transmission mechanism each one round rotation of a driving shaft in synchronism with a combing cylinder to each top-comb holding arms in a condition such that the reciprocal upward and downward swinging motion of a top-comb holding arm is created so that the above-mentioned forward end rearward reciprocal swinging displacing motion of the nipper body is combined with the above-mentioned reciprocal upward and downward swinging motion of the top-comb holding arms of each combing head, whereby each top-comb is reciprocally displaced along a locus of a forward displacement thereof which is a gentle convex curve directed slightly downward, and displaced along a locus of a rearward displacement thereof which is a gentle concave curve directed slightly upward, between a front terminal point of the forward displacement motion and a rear terminal point, located a little higher than the front terminal point, of a rearward displacing motion thereof.
摘要:
A tool change apparatus for a machining center and the like comprises a spindle head vertically slidably mounted on a column, and a spindle rotatably mounted in the spindle head. The spindle has at the lower end thereof a tapered tool reception bore in which a tool is releasably held. When a draw bar is shifted upwards, resilient clamper arms are forced to enter a reduced bore to be contracted thereby so that a head of the tool is clamped. When the draw bar is shifted downwards, engageable end portions are moved into an enlarged recess-like portion whereby the clamper arms are allowed to expand outwards to release the head of the tool. Even when the head is released, a stop pin urged by a spring continues to engage the head of the tool whereby the tool is still held by the spindle.Tools are held by a series of magazine pots. Each pot is indexed to a tool change station. A tool change shaft has two oppositely extending pairs of tool change arms which function to transfer tools between an indexed tool pot and the spindle.
摘要:
A method and apparatus for piecing rovings introduced from almost exhausted roving bobbins suspended by two rows of bobbin hangers mounted on a creel of a conventional ring spinning frame provided with a roving bobbin supply rail disposed in front of the creel, with rovings introduced from full packaged roving bobbins previously carried to the respective supply positions of the supply rail, said for exchanging the almost exhausted roving bobbins for the full packaged roving bobbins. A piecing rovings operation is carried out for each pair of almost exhausted roving bobbins suspended by a front row bobbin hanger and a back row bobbin hanger of the creel, facing each other, together with two corresponding adjacent full packaged roving bobbins of the supply rail, respectively. A roving bobbin exchanging operation is carried out for each pair of almost exhausted roving bobbins having completed the roving piecing operation for corresponding full packaged roving bobbins of the supply rail having completed the roving piecing operation. The roving bobbin exchanging operation and the roving piecing operation are performed in parallel and at the same time.