JPH071173Y2 - Backnet frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a backnet frame that is used by stretching a backnet when practicing baseball, for example.

2. Description of the Related Art A conventional frame of this type is disclosed in, for example, Japanese Utility Model Laid-Open No. 59-38970.

As a ballet lesson bar, for example, as disclosed in Japanese Utility Model Publication No. 58-22193, the upper end of a sheet metal adjuster is connected to the lower surface of a bar receiving pipe, and a pair of front and rear L-shaped adjusters are connected to both sides of the adjuster. There is also one in which the leg member is attached with bolts and nuts so that the column member and the leg member can be assembled.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The above-mentioned conventional frame for a back net is bent vertically at both ends and protrudes upward from the center of the grounding pipe which is used as a grounding leg, and a vertical pipe is formed on a protruding shaft which is considered to be formed by welding. The bottom ends of the horizontal pipes are connected to each other by connecting the pair of left and right ground pipes and vertical pipes in a T shape, and the small diameter shafts at both ends of the horizontal pipes are inserted into the connection pipes welded inward to the lower ends of the vertical pipes. , The lower horizontal pipe is connected, and the upper horizontal pipe connects the upper and lower horizontal pipes and the left and right vertical pipes by inserting the small diameter shafts at both ends into the bent portions at the upper ends of the vertical pipes. While assembling the framework and the grounding leg part below it so that they can be disassembled, the lower end of the vertical pipe connected to the grounding pipe and the T-shape is flattened at both ends to sway the support arm with screw holes. It was configured to be screwed as possible, and the other end of the supporting arm should be inclined in a bracing shape and screwed to the ground pipe.

This conventional back net frame is, as described above,
Weld the salient shaft to the upper center of the grounding pipe, fit the lower end of the vertical pipe, and insert the small diameter shafts at both ends of the horizontal pipe into the connecting tube welded inward to the lower end of the vertical pipe. Since the fitting portion is configured, when manufacturing the frame, welding processing is required in addition to press processing such as pipe bending processing, diameter drawing processing, and cutting processing.

As described above, in manufacturing the frame portion, the number of man-hours is increased and the cost is increased in the conventional back net frame which requires special welding. Unlike press work and cutting work, there are some production defects in that the frame is likely to have non-uniform accuracy due to distortion or the like.

Further, this type of backnet frame is often used while being left outdoors during the season or throughout the year. For this reason, rainwater or the like intrudes into a connecting portion having a welded portion, and rust is easily generated from a welded portion which has been deteriorated by thermal processing to easily cause corrosion.

Even in the conventional ballet lesson bar, there is a welding point between the adjuster and the bar receiver, and this kind of equipment, which is only for indoor use, has a heat treatment like a frame for outdoor use. Although the presence or absence of the welded portion due to the processing does not hinder the use, it is the same as the former that the processing requires special labor and the cost becomes high.

For this reason, in the frame for backnet that is often used while being left outdoors for a long time, it is possible to manufacture the frame without welding and reduce the cost, while suppressing the occurrence of rust as much as possible. It has been desired to improve the durability of the device, and it has been a subject to improve the assembly more easily.

SUMMARY OF THE INVENTION Therefore, according to the present invention, a pair of left and right strut members having connection ports formed at upper and lower ends, and left and right end portions fitted to the connection ports are detachably connected to the strut members. A pair of upper and lower beam members, the upper end of which is attached to the lower part of the pillar member from the front and the back, and the pillar member and the bolts and nuts are detachably fixed to the pillar member. A pair of left and right leg members, and the front and rear leg members and the lower end of the column member are laterally sandwiched from both sides, and two left and right members are detachably fixed to each other by separate bolts and nuts. The present invention provides a frame for a back net, which is a combination of a pair of left and right connecting members.

Action As described above, the present invention connects the pair of left and right column members and the pair of upper and lower beam members only by fitting the connection port and the end portion,
A pair of left and right strut members and a pair of left and right leg members that form a pair in the front and rear are detachably fixed by bolts and nuts, and a pair of left and right connecting members are attached to the strut member and leg members by another bolt and nut. Since it is fixed laterally, there is no welded part at the fitting part of the frame for backnet which can be assembled and disassembled. Therefore, the above-mentioned conventional defects are eliminated all at once.

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

In FIG. 1, reference numeral 1 denotes a pair of left and right column members each having a connection port 2 formed at both upper and lower ends by bending both ends of a metal pipe at right angles in the same direction, and 3 left and right formed by drawing a small diameter. Both ends 4 of which are fitted into the connection port 2 and detachably connected to the support member 1 and which are also made of metal pipe and which make a pair of upper and lower beams 5 are provided at the bottom of the support member 1 and As shown in the figure, with the upper end in the front-back direction, it is fixed to the strut member 1 with bolts and nuts 6,
Open the lower part in the front-back direction and make the tip the grounding part 7,
A pair of left and right metal leg members, each of which is made up of a pair of front and rear a and b, respectively, and 8 from the both sides of the front and rear a, b 1 set of leg members 5 and the lower end of the pillar member 1 located at the center thereof. As shown in FIG. 2, it is a pair of left and right connecting members made of sheet metal which are detachably fixed to each other by separate bolts and nuts 6 along the side.

In the figure, N is a tensioning wire rod 10 inserted through the mounting holes 9 provided in the upper and lower bent portions of the strut member 1 as shown in FIG. It is a back net stretched between the beam member 3.

In this embodiment, as shown in FIG. 3, the support member 1 and the beam member 3 are connected to each other at the edge of the end portion 4 of the beam member 3 which is formed into a small diameter so as to be in close contact with the inner surface of the connection port 2. From
The spring material 11 which is folded in two in a U shape and bent in an L shape and a V shape at the side as shown in FIG.
By fitting the end portion 4 of the beam member 3 while bending the outer end of the beam so as to follow the inner surface of the connection port 2, the beam member 3 is relatively firmly and detachably fitted.

The fixing structure of the fitting portion of the present invention is not limited to the use of the spring member.

Effects of the Invention As described above, a pair of left and right support members, a beam member, a pair of front and rear leg members, and a connecting member are formed, and the support member and the beam member are connected by fitting the connection port and the end portion, According to the present invention, in which the column member, the leg members, and the connecting member are detachably connected to each other by bolts and nuts, respectively.
Since there are no welded parts in the fitting part, it is easy to work, and it is possible to manufacture it only by simple processing methods such as bending processing that can maintain uniform accuracy and plastic deformation such as drawing processing and cutting processing for making holes. it can.

Therefore, compared with the conventional product, the protrusion for inserting the lower part of the vertical pipe was welded to the center upper surface of the ground pipe, and the connecting tube for connecting the horizontal pipe was welded inside the lower part of the vertical pipe. It becomes very easy and the cost can be reduced. Further, since there is no deformation or rust that easily occurs at the welded portion of the fitting portion, the durability of this type of product, which is often used in the field, is significantly improved.

Also, the frame of the present invention is a frame of a leg portion, which is formed by assembling a pillar member and a beam member into a rectangular frame, and connecting a leg member to the pillar member, and further connecting the connecting members for strengthening the connection in the front-rear direction. Since they can be separated from each other, they are easy to assemble and convenient for disassembly, transportation and storage.

The present invention has the practical effects described above.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view showing a use state, FIG. 2 is a partially cutaway vertical side view in an assembled state, and FIG. 3 is a connecting portion of a column member and a beam member. It is a partially notched exploded view. 1 ... Strut member, 2 ... Connection port, 3 ... Beam member, 4 ... End part, 5
... leg member, a ... front leg, b ... rear leg, 6 ... bolt / nut,
7 ... grounding part, 8 ... connecting member, N ... back net, 9 ... mounting hole, 10 ... tensioning wire, 11 ... spring material.

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right support members 1 having connection ports 2 formed at both upper and lower ends thereof, and upper and lower parts which are detachably connected to the support member 1 by fitting both left and right ends 4 into the connection ports 2. The pair of beam members 3 and the lower end of the pillar member 1 are detachably fixed by the upper and lower ends of the pillar member 1 and the bolts and nuts 6, and the lower portions are opened and closed in the front-rear direction.
A pair of left and right leg members 5 in which a and b are a set, the leg members 5 of the front and rear a and b and the lower end of the column member 1 are laterally sandwiched from both sides, and detached from each other by separate bolts and nuts 6. A frame for a back net, which is composed of a pair of left and right connecting members 8 which are freely fixed and each of which is a pair of left and right.