JP2001280337A - Roller device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller device capable of preventing the generation of the collision noise between a roller shaft and a bracket with a simple structure. SOLUTION: A pin hole 25 is formed on an end part 21 of a roller shaft 19, and one of leg parts 29 of a snap pin 27 is inserted into the pin hole 25. A projecting part 33 is formed on a center of the other leg part 31 of the snap pin 27, outwardly expanded parts 37 and 39 larger than the projecting part 33 are formed at both sides of the projecting part 33, and the other leg part 31 is press fitted between a rear surface of a top table 7 and the end part 21 of the roller shaft 19 in inserting the leg part 29 into the pin hole 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller device provided on a top table of a band packing machine.

[0002]

2. Description of the Related Art A roller device is provided on a top table or a work table of a band packing machine in order to facilitate movement of an object to be packed on the table and improve workability. In the roller device, a plurality of, often elongated, roller windows are formed on the top table (plate body), and the rollers are placed on the back side of the top table so that the upper portion of the roller body is located in the roller windows. It is configured by attaching. The installation of the roller
It is performed by inserting the ends of the roller shafts to which the roller body is rotatably attached, respectively, into the support holes of the brackets provided on the back side of the top table at both end positions of the roller window, and at least the roller shafts One end is provided with retaining means for preventing the end from falling out of the bracket support hole.

[0003]

In the roller device having such a configuration, the support hole of the bracket is usually formed to have a diameter slightly larger than the end of the roller shaft so that the roller can be easily mounted. When the object to be packed is placed on the top table or when the roller body rotates, the end of the roller shaft vibrates in the support hole of the bracket, generating an unpleasant collision sound between the roller shaft and the bracket. Worsen the working environment.

Accordingly, an object of the present invention is to provide a roller device that can prevent the generation of a collision sound between a roller shaft and a bracket with a simple configuration.

[0005]

According to the present invention, there is provided a roller device having a roller window formed therein.
A plate body such as a work table or a transport table, a bracket provided at both end positions of the roller window on the back side of the plate body, and a roller shaft having an end inserted into and supported by a support hole of the bracket. A roller device comprising: a retaining means provided at the end of the roller shaft; and a roller body rotatably attached to the roller shaft such that an upper portion is located in the roller window. Wherein the retaining means is configured to press the end of the roller shaft against the inner surface of the support hole of the bracket. The retaining means prevents the end of the roller shaft from falling out of the support hole of the bracket, and is normally provided at both ends of the roller shaft. I do. Since the end of the roller shaft is always pressed against the inner surface of the support hole, the roller shaft does not vibrate and collide with the bracket when the roller rotates. The roller body is usually provided so as to slightly protrude from the roller window, i.e., slightly protrude from the surface of the plate body, but such that the upper end is at the same or almost the same height position as the surface of the plate body. It may be provided.

As a specific mode, a pin hole is formed at an end of the roller shaft, and one leg is inserted into the pin hole as a retaining means, and the other leg is pressed against the back side of the plate body. Using a bifurcated retaining pin, the end of the roller shaft is placed on the inner surface of the bracket support hole (usually below the inner surface) due to the opening restoring force of one leg and the other leg of the retaining pin. Although the roller device of the present invention may be configured to be pressed, preferably, a pin hole is formed at an end of the roller shaft, and as one of retaining means, one leg inserted into the pin hole, A hairpin-shaped snap pin or pinching pin having the other leg pressed against the outer periphery or outer peripheral surface (usually, the outer peripheral upper side or upper peripheral surface upper side) of the end (formed in a circular or square cross section) of the end of the roller shaft ( Pine needle pin etc.) , Is pressed against the other leg of the snap pin on the back side of the plate member, the ends of the roller shaft constitutes a roller device of the present invention so as to be pressed against the inner surface of the support hole of the bracket. By pressing the other leg against the plate body, the end of the roller shaft is pressed by the other leg, usually downward. The pin hole is generally formed in a portion protruding outward from the bracket support hole at the end of the roller shaft so as to penetrate in the radial direction or the thickness direction. Or,
In the roller device of the present invention, the other leg of the forked retaining pin (including a snap pin or a pine needle) is formed so as to undulate, and the other leg is provided between the back side of the plate body and the end of the roller shaft. And the end of the roller shaft is pressed against the inner surface of the support hole of the bracket. Here, the end of the roller shaft is pressed against the inner surface of the support hole of the bracket by the restoring force of the other leg from the deformation due to the press-fitting. The press-fitting of the other leg is performed such that a deformation is applied to the end of the roller shaft so as to exert a pressing force that presses against the inner surface of the support hole. In one aspect of the present invention, the other leg of the retaining pin or the snap pin is formed so as to have a wavy shape with outwardly bulging portions provided on the base side and the tip side, and the two bulging portions form the back surface of the plate body. It is configured to press against the side and to press against the outer periphery of the end of the roller shaft in the middle of both bulging portions. The contact portion of the other leg with the outer periphery of the end of the roller shaft is usually curved along the upper side of the outer periphery of the end. If two parts are provided to be pressed against the back side of the plate body, and the end of the roller shaft is pressed in the middle of the pressed part to the plate body, a stable pressing structure to the roller shaft end is formed. it can.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic perspective view of a packing machine provided with a roller device according to the present invention.

The packing machine 1 pulls out a packing band (not shown) from the band reel 3 and guides it to the arch 5, and the packing object A placed on the metal top table 7 is banded by the packing band. The top table 7 (plate body) is provided with a plurality of roller structures 9 for facilitating movement of the article A to be packed on the table 7 and facilitating the packing operation. ing. Each roller structure 9 is provided on the top table 7,
A roller window 11 which is elongated along the arch 5 and a roller 13 which is attached to a position of the roller window 11 on the back side of the top table 7, and the upper end of the roller body 15 slightly protrudes from the roller window 11. (See also FIG. 2).

FIG. 2 is a sectional view showing the structure of the roller structure 9, FIG. 3 is an enlarged view of an end portion of the roller shaft, and FIG. 4 is a side view of the roller structure 9.

On the back side of the top table 7, metal brackets 17 are provided at both end positions (end positions in the longitudinal direction) of the roller window 11.
Is formed by opening a roller window 11 in the top table 7 in a state where bracket pieces are continuous on both side ends, and bending the bracket pieces so as to extend vertically downward. The roller 13 is composed of a metal roller shaft 19 formed in a circular cross section over the entire length and a roller body 15 rotatably provided on the roller shaft 19, and ends 21 of the roller shaft 19 are respectively attached to the bracket 17. It is attached by inserting it into the support hole 23 provided. The support hole 23 of the bracket 17 is
Roller shaft 1 so that the
9 has a slightly larger diameter than the end 21.

A pin hole 25 is provided in the end portion 21 of the roller shaft 19 at a portion (end portion of the end portion) located outside the bracket 17 in a radial direction.
Inserting one leg 29 of a hairpin-shaped snap pin or pine needle 27 into this pin hole 25 prevents the roller shaft 19 from falling off the bracket 17.
One leg 29 is formed in a straight line, and the other leg 31 is slightly bulged outward (or upward) at the center, and a convex portion 33 (a convex portion 33) for accommodating the outer peripheral upper side of the end 21 of the roller shaft 19. The shape is formed so as to cover the outer periphery of the end portion 21 of the roller shaft 19), and one of the leg portions 29 is inserted into the pin hole 25 so that the snap pin 27 is formed.
Is attached to the end 21 of the roller shaft 19, the one leg 29 and the other leg 31 are pushed apart by the end 21, and the upper inner surface of the pin hole 25 and the upper outer periphery of the end 21 of the roller shaft 19. Is one leg 29 and the other leg 3
1 between the projections 33, and
The snap-in prevention shape prevents the snap pin 27 from coming out of the pin hole 25. The other leg 31
Are formed on the base 35 side and the distal end side, that is, on both sides of the convex portion 33, so that bulging portions 37 and 39 which bulge outward (or upward) larger than the convex portion 33 are formed and are wavy. When attaching pin 27,
The other leg 31 is press-fitted between the back surface of the top table 7 and the end 21 of the roller shaft 19, and both bulging portions 37 and 39 are pressed against the back surface of the top table 7,
The convex portion 33 (inside) presses the outer peripheral upper side of the end portion 21 of the roller shaft 19 to press the end portion 21 downward. Therefore, the function of preventing the projection 33 from coming off the pin hole 25 with respect to the snap pin 27 increases.

[0013]

As described above, in the roller device according to the present invention, since the stopper means presses the end of the roller shaft against the inner surface of the support hole of the bracket, the collision sound between the roller shaft and the bracket is reduced. The generation can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a packing machine provided with a roller device according to the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration of a roller structure.

FIG. 3 is an enlarged view of an end portion of a roller shaft.

FIG. 4 is a side view of a roller structure portion.

[Explanation of symbols]

 7 Top table (plate body) 11 Roller window 13 Roller 15 Roller body 17 Bracket 23 Support hole 27 Snap pin

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E052 BA01 CA01 FA02 LA20 3F033 GA06 GB01 GB04 GE01 3J012 AB06 BB01 CB04 FB01 HB02 3J037 AA07 BB06 HA05 3J103 AA02 BA38 CA03 CA36 CA75 CA78 DA03 FA04 FA15 FA26 GA02 GA32 HA03 HA03

Claims (4)

[Claims] 1. A plate body having a roller window formed thereon,
Brackets provided at both end positions of the roller window on the back side of the plate body, roller shafts each having an end inserted and supported in a support hole of the bracket, and provided at the end of the roller shaft The retaining means
A roller body rotatably attached to the roller shaft so that an upper portion is located in the roller window,
A roller device comprising: a roller device, wherein the stopper means is configured to press the end of the roller shaft against an inner surface of the support hole of the bracket. 2. A plate body having a roller window formed thereon,
Brackets provided at both end positions of the roller window on the back side of the plate body, roller shafts each having an end inserted and supported in a support hole of the bracket, and provided at the end of the roller shaft The retaining means
A roller body rotatably attached to the roller shaft so that an upper portion is located in the roller window,
Wherein a pin hole is formed at the end of the roller shaft, the retaining means includes one leg inserted into the pin hole, and the leg of the roller shaft. A hairpin-shaped snap pin having the other leg pressed against the outer periphery of the end, wherein the other leg of the snap pin is pressed against the back side of the plate body, and A roller device, wherein an end portion is pressed against an inner surface of the support hole of the bracket. 3. A plate body on which a roller window is formed,
Brackets provided at both end positions of the roller window on the back side of the plate body, roller shafts each having an end inserted and supported in a support hole of the bracket, and provided at the end of the roller shaft The retaining means
A roller body rotatably attached to the roller shaft so that an upper portion is located in the roller window,
A pin hole is formed at the end of the roller shaft, and the retaining means comprises a bifurcated retaining pin having one leg inserted into the pin hole. The other leg of the retaining pin is formed so as to be wavy, and is press-fitted between the rear surface side of the plate body and the end of the roller shaft, thereby attaching the end of the roller shaft to the bracket. A roller device pressed against an inner surface of the support hole. 4. The other leg portion is formed so as to be wavy with outwardly bulging portions provided on a base portion side and a distal end side, and the two bulging portions are pressed against the back side of the plate body, and The roller device according to claim 2, wherein the roller device is in pressure contact with an outer periphery of the end portion of the roller shaft at an intermediate portion between the bulging portions.