JPS6315636Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device that converts reciprocating rotational motion, that is, swinging motion, into reciprocating linear motion.More specifically, the present invention relates to a device that converts reciprocating rotational motion, that is, swinging motion, into reciprocating linear motion. In work, etc., it is required that a tool repeatedly make reciprocating linear motion, and in order to meet such requirements, the present invention relates to a device that converts the reciprocating rotational motion of a rotating shaft into reciprocating linear motion of a slide on which the tool is attached. .

BACKGROUND ART Conventionally, as a device for converting reciprocating rotational motion into reciprocating linear motion, a device in which a roller follower is attached to the end of an arm that reciprocates to cause a driven member to perform reciprocating linear motion is generally used. However, in such a device, it is necessary to interpose a spring so that the slide comes into pressure contact with the roller follower, which has the drawback of causing damage to the roller and vibration during high-speed driving. Furthermore, if the spring force needs to be adjusted, the device becomes unavoidably complicated.

Therefore, the present invention improves the deficiencies of the above-mentioned prior art, and provides desired motion characteristics at high speeds.
The rotating shaft is driven using a cam-based rocking device, which has a simple structure that does not cause parts damage or vibration even during high-speed operation, and also allows for easy adjustment of spring force and easy lubrication of sliding surfaces of parts. It is an object of the present invention to provide a device that converts reciprocating rotational motion into reciprocating linear motion.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a rotating shaft 2 connected to a drive device 1 extends into a cavity 9 formed inside the housing 3. As shown in FIG. In the drive device 1, a swinging mechanism using a cam is used, and this mechanism is a known mechanism as shown in FIGS. 3 and 4, for example. In Figures 3 and 4,
A turret 20 having a cam follower 21 protruding from its periphery and fitted onto an output shaft 22
and a three-dimensional cam 24 fitted on the input shaft 23.
When the input shaft 23 and the three-dimensional cam 24 integrated with this shaft are driven to continuously rotate in one direction, the cam surface 25 of the three-dimensional cam 24 and the cam follower 21 engage with each other. The turret 20 and the output shaft 22 are designed to swing. The rotating shaft 2 is driven by the above-mentioned swing mechanism.

The rotating shaft 2 is driven by the above-mentioned cam-based swinging mechanism to make a reciprocating rotational movement, that is, a swinging movement, over a certain angular range around the axis X-X shown in FIG. Ru. The rotating shaft 2 has a circular cross section, and the lower half of its free end is cut out to form a notch 2a, forming a semicylindrical body with a semicircular cross section. A plate 4 is fixed by bolts 10 to the surface of the rotating shaft 2 where the notch 2a is provided. FIG. 2 is a sectional view taken along the line M-M in FIG. 1 and seen in the direction of the arrow.
has a U-shape having a top wall 3a, a side wall 3b and a bottom wall 3c. A hollow cylindrical liner 11 is fixed to the inner surface of the through hole provided in the bottom wall 3c of the housing 3, and a cylindrical slide 6 is fitted inside this liner. The housing 3 is configured to slide on the inner circumferential surface of the housing 3 so as to be able to perform reciprocating linear movement in the vertical direction with respect to the housing 3. A semicylindrical concave groove 6a with a semicircular cross section is formed in the upper end surface of the slide 6, and a semicylindrical engagement member with a semicircular cross section bulging downward is formed in this groove. 5 is engaged. The plate 4 fixed to the rotating shaft 2 is connected to the slide 6 in FIG.
The engaging member 5, which extends upward and is held between the plate 4 and the concave groove 6a of the slide 6, engages the lower surface of the plate 4 and the concave groove according to the vertical linear movement of the slide 6. It is designed to be able to slide on the surface of 6a. A cavity 14 having an upper opening 12 and a lower opening 13 is formed in the top wall 3a of the housing 3, and the threaded rod 8 is inserted into the openings 12, 1.
3 and the space 14 so as to be movable in the vertical direction. The threaded rod 8 is fixed to the slide 6 by threading a male thread provided at its lower end with a female thread provided on the slide 6. Through holes 15 and 16 are formed substantially coaxially in the plate 4 and the engaging member 5, respectively, and the threaded rod 8 is loosely fitted into these through holes and passes through these holes. A somewhat wider gap is formed between the threaded rod 8 and these holes. A spring receiver 17 is provided at the upper end of the threaded rod 8.
A spring 7 is compressed between the lower surface of 7 and a surface 18 of the top wall 3a of the housing 3 defining the cavity 14, and the slide 6 is screwed by the elasticity of the spring 7 acting on the spring receiver 17. It is pulled upward via a rod 8. Below the slide 6, there are
Work tools such as press punches, cutters for cutting wire rods, plate materials, etc., and tools for embedding work such as caulking are attached.

The device of the present invention configured as described above operates as follows. When the swing rotation shaft 2 of the drive device 1 swings around its axis X-X over a certain angular range, that is, performs a reciprocating rotational movement, the plate 4 fixed to the rotation shaft 2 also rotates. Similar to the shaft 2, it performs reciprocating rotational movement around the axis XX. At this time, in FIG. 2, the swing rotation shaft 2 is aligned with the arrow A
When it rotates in the direction shown, the plate 4 rises, so
The engaging member 5 tries to disengage from the lower surface of the plate 4, but since the slide 6 is pulled upward via the threaded rod 8 by the elasticity of the spring 7, the engaging member 5 is pushed up. , for that purpose the engagement member 5 is the plate 4
will rise following the rise in At this time, the engaging member 5
The engaging member 5 rotates while its upper surface slides on the lower surface of the plate 4, and its semi-cylindrical lower surface 5a slides on the semi-cylindrical surface of the concave groove 6a of the slide 6,
The slide 6 moves linearly upward. Further, in FIG. 2, when the swing rotation shaft 2 rotates around its axis X-X in the direction shown by arrow B, the plate 4 presses the slide 6 via the engagement member 5, so the slide 6 moves downward. moves in a straight line. At this time, the engaging member 5
The upper surface engages with the lower surface of the plate 4, and the semi-cylindrical lower surface 5a of the member engages with the concave groove 6 of the slide 6.
The engaging member 5 rotates while sliding on the semi-cylindrical surface of a. As the slide 6 descends, the threaded rod 8 also compresses the spring 7 and descends.

The device of the present invention operates as described above, converting the reciprocating rotational motion of the swing rotation shaft 2 of the drive device 1 into reciprocating linear motion of the slide 6, and operates various tools attached to the slide 6. .

Since the device of the present invention is constructed as described above and operates as described above, it produces the following effects.

(1) A threaded rod 8 whose one end is fixed to the slide 6 is
It extends upward through through holes 16 and 15 formed in the engaging member 5 and the plate 4, and is configured to pull the slide 6 upward under the action of the elastic force of the spring 7. , the spring force can be easily adjusted, the number of parts is small, and the structure is simple.

(2) The engaging member 5 and the plate 4 have through holes 16 and 15.
A somewhat wide gap is formed between these holes and the threaded rod 8 passing through these holes, so that the cross section of the engaging member 5 can be adjusted using this gap. The sliding surfaces of the semicircular lower surface 5a and the surface of the semicylindrical concave groove 6a provided in the slide 6 can be well lubricated.

(3) Since the threaded rod 8 is always pulled upward by the elasticity of the spring 7 and the surface of the concave groove 6a of the slide 6 is pressed against the lower surface of the engaging member 5, the slide 6 and the engaging member 5 are Since there is no risk of creating a gap between the slide 6 and the bottom surface of the engaging member 5, and since the surface of the concave groove 6a of the slide 6 and the bottom surface of the engaging member 5 are in contact with each other at a surface with a semicircular cross section, the device can be driven at high speed. be.

[Brief explanation of the drawing]

FIG. 1 is a front view of the device of the present invention, with a part thereof cut away, and FIG. 3 and 4 are a front view and a side view showing a rocking mechanism using a cam for driving the device of the present invention. DESCRIPTION OF SYMBOLS 1... Drive device, 2... Rocking rotation shaft, 3... Housing, 4... Plate, 5... Engaging member, 6... Slide, 6a... Concave groove, 7... Spring, 8... threaded rod.

Claims (1)

[Claims for Utility Model Registration] (1) A drive device that has a rotating shaft and that rotates the rotating shaft back and forth around the axis over a certain angular range, and a top wall that faces each other with a space in between. and a bottom wall; and a slide attached to the bottom wall of the housing so as to move linearly in a vertical direction with respect to the housing, and having a concave groove with a semicircular cross section formed on the top surface. and is disposed between the concave groove of the slide and the lower surface of the plate fixed to the rotating shaft, and is held slidably with respect to the lower surface of the plate and the surface of the concave groove. an engaging member having a semicircular cross section bulging downward; one end fixed to the slide, the other end supported by the top wall of the housing, and capable of reciprocating up and down with respect to the housing. a connecting rod, and a spring disposed on the top wall of the housing that constantly pulls the slide upward via the connecting rod and exerts an elastic force so as to force the slide into press-fitting engagement with the engaging member. a through hole is formed in substantially the center of the engaging member and the plate, the connecting rod is loosely inserted into the through hole, and the rotating shaft moves in the direction in which the plate is raised. When the plate rotates, the slide moves up together with the engagement member due to the elasticity of the spring, following the rise of the plate, and when the rotating shaft rotates in a direction that lowers the plate, the plate moves upward. A device for converting reciprocating rotational motion of a rotary shaft into reciprocating linear motion of a slide, which presses the slide via a mating member to compress the spring and lower the slide. (2) Utility Model Registration The device according to claim 1, wherein the drive device reciprocates the rotating shaft by a rocking device using a cam.