JPS5844476B2 - crane rail - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a composite strip tie pad comprising a metal strip core plate used for supporting a crane rail and rubber layers integrally fixed to both upper and lower surfaces of the core plate.

Conventionally, the band-shaped tie pads installed at the bottom of crane rails are of the type in which hard elastic outer layer bands made of fiber-mixed hard rubber are fixed to the upper and lower surfaces of a soft elastic middle band made of soft rubber, respectively. It is being

However, this type of band-shaped tie pad has low bending rigidity in the lateral direction, so if it is installed at the bottom of a crane rail where heavy wheel loads are applied and used for a long period of time, the band-shaped tie pad 10 will bend against the rail as shown in Fig. 1. It may partially curve laterally between the clips 11 and protrude to the side of the crane rail 12.

As a countermeasure to this problem, it is conceivable to embed a core plate made of a steel plate or other metal plate in the middle part of the rubber band-like tie pad in the thickness direction.

However, in this case, if the core plate is not buried at a uniform height over the entire surface of the strip-shaped tie pad, that is, if the height of the core plate varies in the longitudinal direction or width direction of the strip-shaped tie pad, the upper surface of the core plate Also, since the thickness of the rubber layer on the lower surface also changes in the longitudinal and width directions of the band-shaped tie pad, the spring constant of the band-shaped tie pad partially changes, making it impossible to support the crane rail with a uniform spring constant. occurs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a composite strip tie pad in which the entire metal strip core plate can be buried at a predetermined height using simple means.

Next, the present invention will be explained in detail using illustrated examples.

2 to 4 show a flat box-shaped mold used in the present invention, which is a flat box having a band-like space formed by a flat box-shaped lower mold 2 and a flat box-shaped upper mold 4. A shaped mold 1 is constructed, and a large number of truncated conical lower support protrusions 6 are arranged on the lower inner surface 3 of the belt-shaped lower mold 2 at two intervals in the width direction, and in the longitudinal direction. A large number of truncated cone-shaped upper support protrusions 7 are provided integrally with each other at intervals in the direction, and a large number of truncated conical upper support protrusions 7 are provided on the band-shaped lower support surface 5 of the upper mold 4. These molds 2,
A plurality of positioning holes 13 and positioning protrusions 14 are provided for positioning.

When manufacturing a composite band-shaped tie pad, as shown in the 51st audience, a metal band-shaped core plate 8 made of a band-shaped steel plate is fitted into the upper part of the lower mold 2, and the lower support protrusion 6 of the lower mold 2 is inserted.
and the upper support protrusion 7 of the upper mold 4, and a large number of sheet-like soft rubber materials 9 are interposed in a laminated state between the belt-shaped core plate 8 and the belt-shaped lower inner surface 3 and the belt-shaped upper inner surface 5. By heating and pressurizing the rubber material 9, the rubber material 9 is vulcanized and integrally fixed to the belt-shaped core plate 8.

FIG. 6 shows the obtained composite band-shaped tie pad, in which a soft rubber layer 9 is formed on the upper surface and one surface of the metal band-shaped core plate 8.
' is fixed in one piece by baking.

FIG. 7 shows the aforementioned flat box-shaped mold 1 in which a fiber-containing hard rubber layer 15 and a soft rubber layer 9' are sequentially arranged on both sides of a belt-shaped core plate 8.
1 shows a composite band-shaped tie pad manufactured by.

The seizure strength between the metal plate and the fiber-mixed hard rubber can be made greater than the seizure strength between the metal plate and the soft rubber, and the soft rubber and the fiber-mixed hard rubber can be easily bonded together by cross-linking during vulcanization. Moreover, since they are firmly integrated, the composite strip-shaped Quipad shown in FIG. 7 has lower strength than the composite strip-shaped Quipad shown in FIG. 6.

In the embodiment described above, the positioning hole 13 is provided in the lower mold 2 and the positioning protrusion 14 is provided in the upper mold 4; however, conversely, the positioning protrusion 14 is provided in the lower mold 2 and the positioning protrusion 14 is provided in the lower mold 2. 13 may be provided on the upper mold 4.

Moreover, if the depth of the lower mold 2 is made slightly larger than the depth of the upper mold 4 and the strip-shaped core plate 8 is fitted into the upper part of the lower mold 2 as in the above embodiment, The horizontal positioning of the strip core plate 8 can be easily performed.

According to this invention, the band-shaped lower inner surface 3 of the lower mold 2 and the -L portion mold 4 in the flat box-shaped mold 1 having a band-shaped space.
A plurality of lower bearing protrusions 6 and a plurality of upper bearing protrusions 7 are provided at intervals in the longitudinal direction on the inner surface 5 of the part in the form of a band, and each lower bearing protrusion 6 and each upper bearing protrusion 7 form a metal Since the band-shaped core plate 8 is held and a rubber material is interposed between the band-shaped core plate 8 and the band-shaped lower inner surface 3 and the band-shaped upper inner surface 5, heating and pressurization, that is, vulcanization is performed, the metal band-shaped core plate Vulcanization can be carried out while holding the core plate 8 at a substantially uniform height over its entire length and gold plate, thus preventing meandering deformation by having a rubber layer with a uniform thickness over the entire upper and lower surfaces of the metal strip core plate 8. Effects such as the ability to easily manufacture a type of composite band-shaped quill pad by using a cylindrical means can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing a conventional belt-shaped Quibad protruding from the side of a crane rail, Fig. 2 is a longitudinal sectional front view showing a flat box-shaped mold used in carrying out the present invention, and Fig. 4 is a perspective view showing the inside of the upper mold, FIG. 4 is a perspective view showing the inside of the lower mold, and FIG. 5 is a perspective view showing the metal core plate and rubber material housed in the box-shaped mold. The longitudinal front view, FIGS. 6 and 7 are longitudinal sectional perspective views showing an example of the manufactured composite band-shaped tie pad. In the figure, 1 is a flat box-shaped mold, 2 is a lower mold, 3 is a strip-shaped lower inner surface, 4 is a -L part mold, 5 is a strip-shaped inner part, and 6
7 is a lower bearing projection, 7 is a -L portion bearing projection, 8 is a metal belt-shaped core plate, 9 is a rubber material, 9' is a soft rubber layer, and 15 is a fiber-mixed hard rubber layer.

Claims (1)

[Claims] 1. In the flat box-shaped mold 1 having a band-shaped space, the band-shaped lower inner surface 3 of the lower mold 2 and the band-shaped upper inner surface 5 of the lower mold 4
A large number of lower bearing protrusions 6 and a large number of upper bearing protrusions 7 are provided at intervals in the width direction and longitudinal direction, respectively, and each lower bearing protrusion 6 and each upper bearing protrusion 7 support a metal strip-shaped core plate 8. A method for producing a composite band-shaped tie pad for a crane rail, which comprises gripping the band-shaped core plate 8, and interposing a rubber material 9 between the band-shaped lower inner surface 3 and the band-shaped upper inner surface 5 and heating and pressurizing them.