JPH0432037Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an improvement in a claw attachment device for attaching conveyance claws to a chain used for lifting stem culms in a harvester or other conveyance device. .

[Conventional technology]

When rotatably attaching a lifting or transporting claw to a chain used for lifting or transporting stem culms in a harvester such as a binder or combine harvester,
Insert a pin into the through hole provided in the protruding part of the upper and lower chain plates through the insertion hole provided in the attachment part of the proximal end of the claw, and fix the pin inserted through the insertion hole of the claw.
For example, it is known to provide a split pin between the attachment part of the proximal end of the claw and the pin, or to do so as in Japanese Utility Model Publication No. 15706/1983.

[Problem that the invention attempts to solve]

However, since the above-mentioned known technology requires a hole in the pin for inserting the cotter pin, processing costs are high, installation of the cotter pin is troublesome, and the claws become old and need to be replaced. If the cotter pin is pulled out in such a case, the cotter pin may break and cannot be easily removed.

Furthermore, the method disclosed in Japanese Utility Model Publication No. 53-15706 is complicated and requires processing to attach a head and a retaining protrusion to the pin, resulting in high manufacturing costs, and the retaining protrusion is inserted into a synthetic resin claw by pressure. However, there is a problem in that the pins tend to come off during long-term use, making them unsuitable for practical use.

[Purpose of invention]

Therefore, the present invention was devised to solve the above-mentioned problems.The purpose of this invention is to make the nails easy to install, sufficiently durable for long-term use, and inexpensive to manufacture; An object of the present invention is to provide a claw attachment device for a stem culm lifting or conveying chain, which allows the user to easily recognize the direction in which the pin is pulled out when replacing the stem culm.

[Means for solving problems]

In order to achieve the above object, the claw attachment device for the chain for lifting or conveying stem culms according to the present invention has an insertion hole in the attachment part of the base end of the claw and a through hole provided in the protruding part of the upper and lower chain plates. In a stem culm pulling or conveyance chain claw attachment device in which a claw is rotatably attached to a chain by an inserted pin, the pin is divided into a long piece and a short piece to form a protrusion in the circumferential direction. However, the length L of the long piece is the distance l between the inlet side surface of the first insertion port and the second contact surface of the chain, and the distance l between the first contact surface and the exit part of the second insertion port. is larger than the distance m between the short piece and the surface of the first insertion hole, and when the pin is attached to the insertion hole, the pin protrudes to the outside of the second insertion hole, and the short piece is The length is approximately the same as the distance between the surface of the insertion hole and the first contact surface, and when the pin is attached to the insertion hole, the short end surface of the pin and the surface of the first insertion hole are approximately flush with each other. It is characterized by being configured so that

[Effect]

In this way, the pin is divided into a long piece and a short piece to form a protrusion in the circumferential direction, and the length L of the long piece is between the entrance side surface of the first insertion port and the second contact surface of the chain. and the distance m between the first contact surface and the exit surface of the second insertion port,
In the state where the pin is attached to the insertion hole, the pin protrudes outward from the second insertion hole, and the short piece is connected to the surface of the first insertion hole and the first insertion hole.
The length is approximately the same as the distance between the abutting surfaces of the pin, and the short end surface of the pin and the surface of the first insertion hole are configured to be approximately in a plane when the pin is attached to the insertion hole.

Therefore, when the long piece 4c of the pin 4 is inserted into the insertion hole 2c, the tip of the long piece 4c is inserted into the second insertion hole 2g.
held within. When the end of the short piece 4b is tapped or pressed, the end of the long piece 4c is guided by the insertion hole 2g, making it easy to insert and fix the pin 4. Also, the piece 4c is longer than the distance m between the first contact surface 2h and the surface of the exit portion of the second insertion hole 2g.
is long, and the tip of the long piece 4c protrudes from the outlet of the insertion hole 2g.
It is located within the recess 2e, which is the inner surface of the cam portion 2b, and is in a protected state. Therefore, the hitting side when removing the pin 4 can be easily recognized, and the protrusion 4a can be removed from the first insertion opening 2f side.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

1 is a chain supported on a suitable chain case such as a grain culm lifting case for a combine harvester;
Place the upper and lower chain plates 1 at appropriate intervals.
A, 1a is provided with a protrusion 1c having a through hole 1b. A through tube 1 is provided in the through hole 1b.
d is fitted and fixed.

2 is a synthetic resin lifting or conveying claw attached to the protrusion 1c of the chain 1,
The mounting portion 2a at the base end is provided with cam portions 2b, 2b which are guided by contacting the guide plate 3 (Fig. 5) of the chain case A, and a recess 2e surrounded by the cam portions 2b, 2b. (Fig. 1) Insertion hole 2c
When the chain plates 1a, 1a are inserted into the mounting portion 2a (FIG. 1, FIG. 4), which has a U-shaped cross section, a gap 〓H (FIG. 1) is formed. A space 2d for inserting the protrusion 1c that can be formed is formed.

4 is a pin for attaching the claw 2, and its shape is a straight round bar as shown in Fig. 2 a, b, and c.
The diameter is smaller than that of the insertion hole 2c provided in the claw 2 and the through hole 1b provided in the chain 1, and a protrusion with a diameter slightly larger than the diameter of the insertion hole 2c is provided on the surface circumferential surface thereof, biased to one side. An appropriate number of 4a are formed in the circumferential direction by an automatic extrusion processing machine.

The protrusion 4a provided around the pin 4 is shown in Fig. 2a.
There are those in which discontinuous protrusions are arranged in an annular shape as shown in FIG. It is divided into a piece 4c and a short piece 4b, and when attaching the claw 2 to the chain 1, the long piece 4c side is inserted into the insertion hole 2c.

In this case, as shown in FIGS. 1 and 3, the insertion hole 2c on the side into which the pin 4 is inserted is the first insertion hole 2f,
Further, the side from which the long piece 4c of the pin 4 projects is referred to as a second insertion hole 2g. Therefore, when the pin 4 is inserted through the lower insertion hole 2g, the insertion hole 2g is interpreted as the first insertion hole.

Similarly, the surface that engages with the chain on the side of the first insertion hole 2f is defined as a first abutting surface 2h, and the surface opposite to this first abutting surface 2h is defined as a second abutting surface 2i.
Therefore, when the pin 4 is inserted from the second insertion hole 2g side, the first contact surface is the 2i side, and the second contact surface is the 2h side.

Now, in the present invention, the insertion hole 2c and the pin 4
The dimensions have the following relationship.

The length L of the long piece 4c of the pin 4 is the first insertion hole 2f.
It is larger than the distance l between the inlet portion of and the second contact surface 2i. That is, before the pin 4 is driven into the insertion hole 2c of the claw 2 as shown in FIG. 3, the tip of the long piece 4c is inserted and held in the second insertion hole 2g. As shown in FIG. 3, the distance m between the first contact surface 2h and the outlet of the second insertion hole 2g
is configured to be shorter than the length L of the long piece 4c.

The long piece 4c of the pin 4 is protected in the recess 2e formed on the back surface of the cam part 2b when it is driven into the claw 2 as shown in FIG. Satoru.

The structure of the protrusion 4a may be shown by the dotted line in FIG. 2b, or it may be protruded annularly around the entire circumference as shown in FIG. 2c. They can also be formed by combining them.

Therefore, when assembling the claw 2 as shown in FIG.
The annular protrusion 4a is brought into contact with the first contact surface 2h by hitting or pushing it in from above until it passes through.
and the chain plate 1a, and insert the tip of the long piece 4c of the pin 4 downward into the insertion hole 2c of the mounting part 2a, so that the tip protrudes into the recess 2e. be stored in the same condition.

When the pin 4 is inserted into the claw 2 and chain 1 in this way, the protrusion 4a is inserted into the insertion hole 2c of the claw 2.
It resists the elasticity of the inner wall surface of (the first insertion hole 2f), and after passing through the inner wall surface while slightly damaging it, it returns to its original diameter.

Therefore, the protrusion 4a that has reached the space H between the first abutment surface 2h and the chain plate 1c can be easily assembled without coming off upward or downward during use.

Also, when replacing the claw 2, use the second insertion hole 2.
The end of the long piece 4c protruding into the recess 2e on the g side is tapped or pressed. In this case, since the length L of the long piece 4c is larger than the distance l between the first contact surface 2h and the second insertion hole 2g, the direction in which the pin 4 is removed can be easily determined, and the length The pin 4 can be used again because the piece 4c can be easily driven in and the pin 4 can be easily removed by passing the protrusion 4a through the first insertion hole 2f again.

[Effect of idea]

As described above, the present invention divides the pin into a long piece and a short piece to form a protrusion in the circumferential direction, and the length L of the long piece is between the entrance side surface of the first insertion port and the chain. the distance l between the second abutting surface and the distance m between the first abutting surface and the surface of the exit portion of the second insertion port, and the pin is attached to the insertion port. In this state, the pin protrudes outward from the second insertion hole, and the short piece has a length that is approximately the same as the distance between the first insertion hole surface and the first abutting surface, and the pin protrudes outward from the second insertion hole. The short end surface of the pin and the surface of the first insertion port are configured to be substantially flush with each other when the pin is attached to the insertion hole.

Therefore, to assemble the pawl 4, first insert the chain 1 between the two-pronged attachment portions 2a of the pawl 2, and then insert the chain 1 into the insertion hole 2c (first insertion hole 2f, second insertion hole 2g) and the through hole. The long piece 4c of the pin 4 is inserted into the hole 1b.
Then, move the pin 4 from the short piece 4b side to the long piece 4c side.
The annular protrusion 4a is passed through the first insertion hole 2f by hitting or pushing the head of the holder, and the protrusion 4a is brought into the middle part H, thereby completing the process.

Furthermore, when removing the pin 4, it is sufficient to remove it in the opposite direction.

As shown in FIG. 3, in the state before the pin 4 is installed, the tip of the long piece 4c of the pin 4 is inserted and supported in the second insertion hole 2g, so even if the end of the short piece 4b is struck. The long piece 4c will not damage the second insertion hole 2g.

Therefore, according to the present invention, the claw 2 is attached to the chain 1 only by pushing or tapping the pin 4, and the protrusion 4b is prevented from coming off upward or downward between the attachment part 2a and the chain plate 1a. The straight pin 4 having the protrusion 4a in the middle can be mass-produced at low cost, and this type of device using a large number of claws 2 can be provided at low cost. There are benefits to be gained.

Furthermore, when the pawl is used for transportation, the protrusion also functions as a washer, so that the attachment portion and the chain plate do not come into direct contact with each other, and the up and down rotation of the pawl can be made even smoother.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main parts showing the completed installation of the claw according to the present invention, Figure 2a is a perspective view of the pin, Figure 2b is a plan view of the same pin, and Figure 2c is another type. FIG. Fig. 3 is a cross-sectional view of the main part showing the state before the claw is attached to the chain, Fig. 4 is a perspective view showing the state where the claw is attached to the chain, and Fig. 5 is a perspective view showing the state where the claw is attached to the chain.
The figure is a sectional view showing a case where the method is applied to a grain culm raising case. 1...Chain, 1a...Chain plate,
1b...Through hole, 1c...Protrusion, 1d...Through tube, 2...Claw, 2a...Mounting part, 2b...Cam part, 2c...Insertion hole, 2d...Space, 2e...Recess , 2f...first insertion hole, 2g...second insertion hole, 2h...first contact surface, 2i...second contact surface, 3...guide plate, 4...pin, 4a... ...Protrusion, 4b...Short piece, 4c...Long piece, H...Between
Department.

Claims (1)

[Scope of utility model registration request] A chain for lifting or transporting stem culms, in which the claws are rotatably attached to the chain by means of pins inserted into the insertion holes in the attachment part at the base end of the claws and through holes provided in the protruding parts of the upper and lower chain plates. In the claw attachment device, the pin is divided into a long piece and a short piece to form a protrusion in the circumferential direction, and the length L of the long piece is between the entrance side surface of the first insertion port and the second part of the chain. and a distance l between the contact surface of the first contact surface and a distance m between the first contact surface and the exit surface of the second insertion port, and the pin is attached to the insertion port. The pin protrudes outward from the second insertion hole, and the short piece has a length that is approximately the same as the distance between the first insertion hole surface and the first contact surface, and the pin protrudes outward from the second insertion hole. A claw attachment device for a chain for lifting or conveying a stem culm, the device being constructed such that when the pin is attached to the hole, the short end surface of the pin and the surface of the first insertion port are substantially flush with each other.