JPH0612591U - Guide shell foot pad - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent deformation near the bonding surface between the elastic padding member and the base member of the foot pad to increase the adhesive force and improve the durability. [Structure] A cylindrical rib 8 surrounding a rear side surface of an elastic rock-bonding member 4 bonded to a front surface of a base member 5 fixed to a tip portion of a guide shell is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a foot pad provided at the tip of a guide shell of a punching device.

[0002]

[Prior art]

 As shown in FIG. 3, a guide shell 2 equipped with a punching machine 1 is provided with a foot pad 3 at its tip. When drilling, the foot pad 3 is pressed against the face to guide the guide. Secure the shell 2. As shown in FIG. 4, the foot pad 3, which serves as a contact point between the rock face of the face and the guide shell, has an elastic rock contact member 4 for absorbing the unevenness of the rock face of the face and vibration during drilling, and this elastic rock contact member 4. And a base member 5 for mounting and holding.

In general, a steel material is used for the base member 5 and a hard rubber material is used for the elastic rock contact member 4. In many cases, the rubber material is vulcanized and bonded on the plane of the steel material, but the adhesive force is increased. Therefore, a protrusion may be provided inside to increase the bonding area.

[0004]

[Problems to be solved by the device]

 However, since the foot pad 3 is pressed against the bedrock 6 with a strong force F as shown in FIG. 5 in order to prevent the guide shell 2 from being displaced, the elastic rock contact member 4 is deformed and the front surface is uneven. 6 and is deformed laterally, and this deformation causes peeling of the adhesive surface 7 between the elastic rock contact member 4 and the base member 5. In addition, if a protrusion is provided inside in order to increase the adhesive force, the protrusion causes a crack in the elastic rock-bonding member, and there is a problem that the durability of the foot pad 3 is reduced.

The present invention solves such a problem in the foot pad, and prevents deformation of the elastic rock-bonding member near the bonding surface with the base member to prevent bonding between the elastic rock-bonding member and the base member. The purpose is to increase the force and provide a highly durable guide shell foot pad.

[0006]

[Means for Solving the Problems]

 The present invention relates to a foot pad base member including a base member fixed to a tip end portion of a guide shell of a drilling device and an elastic rock contact member bonded to a front surface of the base member, and a rear member of the elastic rock contact member. The above problem is solved by providing a tubular rib surrounding the side surface.

[0007]

[Action]

 The cylindrical ribs prevent lateral deformation of the elastic rock-bonding member near the bonding surface with the base member, preventing peeling of the bonding surface, and the cylindrical ribs increase the area of the bonding surface and increase the adhesive strength. Will increase. Therefore, the durability is improved.

[0008]

【Example】

 FIG. 1 is a sectional view showing the structure of a foot pad according to the present invention. Here, in the foot pad 3, the elastic rock-growing member 4 is bonded to the front surface of the base member 5, and the base member 5 surrounds the rear side surface of the elastic rock-growing member 4 so as to surround the tubular member. Mold ribs 8 are provided.

Similar to the conventional foot pad 3, the base member 5 is fixed to the tip portion of the guide shell 2 mounted with the punching machine 1 as shown in FIG. In the case of drilling, as shown in FIG. 2, the foot pad 3 is pressed against the rock face 6 of the face to fix the guide shell 2. The foot pad 3 is pressed against the bedrock 6 with a strong force F, and the elastic rock-bonding member 4 is deformed, so that the footpad 3 comes into close contact with the bedrock 6 having an uneven front surface. However, in the vicinity of the bonding surface 7 of the elastic rock contact member 4 to the base member 5 at the rear portion, the tubular ribs 8 prevent lateral deformation, and peeling does not occur.

The present invention can also be applied to anti-vibration rubber, stoppers and the like.

[0011]

[Effect of device]

 As described above, the foot pad of the guide shell according to the present invention can increase the adhesive force between the elastic rock contact member and the base member and improve the durability.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a foot pad according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a state where a foot pad is pressed against a rock mass.

FIG. 3 is a side view of a guide shell.

FIG. 4 is a vertical cross-sectional view of a conventional foot pad.

FIG. 5 is an explanatory diagram of a state where a conventional foot pad is pressed against rock.

[Explanation of symbols]

 1 Drilling machine 2 Guide shell 3 Foot pad 4 Elastic rock contact member 5 Base member 6 Bedrock 7 Bonding surface 8 Tubular rib

Claims (1)

[Scope of utility model registration request] 1. A foot pad comprising a base member fixed to the tip of a guide shell of a drilling device and an elastic rock contact member bonded to the front surface of the base member, wherein the elastic rock contact member is attached to the base member. A foot pad for a guide shell, comprising a tubular rib surrounding a rear side surface of the member.