JPH0330326Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to an automatic roller chute conveyor, etc., which includes a bottom piece and a rising side piece formed by bending both ends of the bottom piece so as to face each other. A pair of left and right bearing holes facing each other are provided at predetermined intervals in the longitudinal direction of the frame in the rising side piece of the frame, which has a substantially U-shaped cross section, and the shaft end of the idling roller is pivotally supported in these bearing holes. This invention relates to an improvement of a simple roller conveyor.

[Conventional technology]

As a conventional example of the above-mentioned simple roller conveyor, for example, as shown in Japanese Utility Model Application Publication No. 58-53710, with both side walls of the rail material expanded left and right, both ends of the spindle supporting the idle rollers are There is a device that is inserted into a drop hole and fitted into a bearing hole, and then the both side walls are deformed so as to be parallel to each other.

[Problem that the invention attempts to solve]

However, in the structure described above, the side walls have a straight shape, and the only bending parts are the bent parts of the rail material body and both side walls, and a large number of idle rollers are installed between the both side walls. If the both side wall portions are repeatedly expanded and restored by removal, etc., there are drawbacks such as deformation and strain remaining in the bent portions and the side wall portions being prone to warping in the longitudinal direction.

The present invention has been developed with the above-mentioned considerations in mind, and its purpose is to prevent deformation and distortion from remaining even if the side wall is repeatedly expanded and restored when attaching and removing the idler roller. To provide a simple roller conveyor in which both side wall parts do not warp in the longitudinal direction and in which idle rollers can be easily attached and removed.

[Means for solving problems]

In order to achieve the above-mentioned object, the simple roller conveyor according to the present invention has a reinforcing protrusion formed in the longitudinal direction of the bottom piece, and these rising side pieces are formed on the lower side of the bearing holes of the rising side pieces. A bending fulcrum capable of elastically deforming outward is formed by a bent portion projecting outward in a dogleg shape.

[Effect]

According to the above configuration, even if both rising side pieces are expanded by applying an outward pressurizing force to both rising side pieces when attaching or removing the idle roller, there is no outward force on both rising side pieces. Since a protruding bent part is formed in the shape of a letter, both rising side pieces expand around this bent part, and the base on one side of the bottom of both rising side pieces also deforms.
Even if a strong force is applied during expansion, there will be no deformation strain, and since bent parts are formed on both rising side pieces and a reinforcing protrusion is formed in the longitudinal direction of the bottom piece, The entire frame does not warp in the longitudinal direction even if a large number of idle rollers are repeatedly attached and detached, and the above object is completely achieved.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1 to 3, A is a frame having a substantially U-shaped cross section, and includes a bottom piece 4 and rising side pieces 1a and 1b formed by bending both ends of this bottom piece 4 so as to face each other. , these rising side pieces 1
Top piece 2 bent from the upper end of each of a and 1b
a, 2b, and hanging pieces 3a, 3b bent further downward from the tips of these side pieces 2a, 2b. A reinforcing protrusion 5 is formed on the bottom piece 4 over the entire length of the frame A, and on the rising side pieces 1a and 1b at a portion relatively closer to the bottom piece 4, that is, as shown in FIGS. As shown in
Bent portions 6a projecting outward in a dogleg shape on the lower side of bearing holes 7a and 7b, which will be described later.
6b is formed.

These bent portions 6a, 6b are formed on the rising side piece 1.
It serves as a flexure fulcrum for elastic deformation when a and lb are held in hand or bent outward using a suitable tool, and the bent portions 6a and 6b are expanded by the bending force. By performing such a movement, the above-mentioned elastic deformation is suitably tolerated. Therefore, the frame A is made of a thin strip metal plate (for example, a galvanized steel plate) which is susceptible to elastic forces.

Reference numeral B designates an idling roller made of synthetic resin, which is fitted around the roller shaft C so that it can freely rotate and slide freely in the axial direction.

Further, in the frame A, top pieces 2 are provided at each of the idle roller attachment portions in the longitudinal direction.
From a, 2b to the rising side pieces 1a, 1b, bearing holes 7a, 7b having an appropriate depth and a width equal to the roller axis C are cut out on opposite sides. In this case, the top pieces 2a, 2b are not completely removed, but engaging portions 8a, 8b are left on the top pieces 2a, 2b to prevent the roller shaft C from coming off. In addition, the axial length 1 of the roller shaft C
As shown in FIG. 3, the distance d is made slightly shorter than the distance d between the inner surfaces of the hanging pieces 3a and 3b so that the distance d falls comfortably within the distance d.

Next, the procedure for attaching and detaching the idle roller B to the frame A in the simple roller conveyor having the above structure will be explained with reference to FIGS. 4 and 5.

First, in order to attach the idler roller B to the frame A, as shown in FIG. The rising side pieces 1a, 1b are elastically deformed by expanding the bent portions 6a, 6b, which are the fulcrums, using the bent portions 6a, 6b as the fulcrums, respectively. Open the mouth part 9, and while maintaining this state, insert both ends of the roller shaft C into the bearing holes 7a, 7b, and drop the idle roller B into the frame A. Next, as shown in FIG. ,
The pressing force on the rising side pieces 1a and 1b is released to cause them to return to their original positions.

In this state, the roller shaft C is in the bearing hole 7.
a, 7b to be supported and rotatable, and the engaging portions 8a, 8b of the top pieces 2a, 2b are located directly above both ends of the roller shaft C, preventing the roller shaft C from slipping out above. blocked. Further, the roller shaft C is accommodated within the distance d between the hanging pieces 3a and 3b, and its movement in the left and right direction is restricted.

Then, the idle roller B can be removed by following the procedure reverse to the above-mentioned installation procedure.

[Effect of idea]

As explained above, in the simple roller conveyor according to the present invention, the bottom piece is provided with reinforcing protrusions in the longitudinal direction thereof, and these rising side pieces are placed on the lower side of the bearing holes of the rising side pieces. The bending point that can be elastically deformed to As a result, the idling roller can be easily attached or removed almost in one touch, and therefore, the number of steps required for attaching and detaching the idling roller can be greatly reduced.
When the idling roller is attached, the idling roller is pivotally supported by both rising side pieces that have returned to their natural shapes, so accidents of falling off due to insufficient rotation can be suitably prevented.

When attaching or removing the idle roller, when a force is applied to the above-mentioned rising side pieces to expand them outward, the bends formed on both rising side pieces protrude outward in a dogleg shape. Both rising side pieces expand around the center, and the base on one side of the bottom of both rising side pieces is also deformed. Therefore, when attaching or removing a large number of idle rollers, apply strong force to both rising side pieces, and expand. Even after repeated opening and restoring, deformation strain remains on both rising side pieces.

In addition, bent parts are formed on both rising side pieces, and reinforcing protrusions are formed in the longitudinal direction of the bottom piece, so even if a large number of idle rollers are repeatedly installed and removed, the entire frame remains intact. This prevents warping in the longitudinal direction.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention,
Fig. 1 is a plan view of a simple roller conveyor, Fig. 2 is a partially cutaway front view thereof, and Fig. 3 is a -
The cross-sectional view along the line, FIGS. 4 and 5 are explanatory diagrams for explaining the installation procedure of the idle roller. A... Frame, B... Idle roller, C... Roller shaft, 1a, 1b... Standing side piece, 4...
Bottom piece, 5... Convex portion, 6a, 6b... Bent portion.

Claims (1)

[Scope of utility model registration request] A pair of left and right bearing holes facing each other are inserted into the raised side pieces of the frame, which has a substantially U-shaped cross section and includes a bottom piece and rising side pieces formed so as to face each other by bending both ends of the frame. In a simple roller conveyor in which bearing holes are provided at predetermined intervals in the longitudinal direction and shaft ends of idle rollers are pivotally supported in these bearing holes, reinforcing protrusions are formed in the bottom piece in the longitudinal direction, and A simple roller characterized in that, on the lower side of the bearing hole of the rising side piece, a bending point that allows both rising side pieces to elastically deform outward is formed by a bent part projecting outward in a dogleg shape. conveyor conveyor.